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v8/test/cctest/interpreter/bytecode_expectations/StandardForLoop.golden

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[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
#
# Autogenerated by generate-bytecode-expectations.
#
---
wrap: no
test function name: f
---
snippet: "
function f() {
for (let x = 0; x < 10; ++x) { let y = x; }
}
f();
"
frame size: 2
parameter count: 1
Skip hole initialization of lexical variables when possible This patch expands scope analysis to skip hole initialization when it can be determined statically that no hole checks will be generated at runtime. Two conditions must be met to safely eliminate hole initialization: - There must not exist a VariableProxy referencing this Variable whose HoleCheckMode is kRequired - The Variable must be stack allocated; any other allocation implies that it may be accessed from not-yet-analyzed scopes (other modules, inner functions, or eval code) and that code may require hole checks. The new logic required removing debug code in full-codegen which is now incorrect in some cases. Also fixed Variable's bitfield helpers to take no more space than needed. Bug: chromium:651637 Change-Id: Ie5ac326af4e05b7a5c3c37cd4d0afba6a51a504d Reviewed-on: https://chromium-review.googlesource.com/494006 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45170}
2017-05-08 18:55:54 +00:00
bytecode array length: 26
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
bytecodes: [
/* 10 E> */ B(StackCheck),
/* 30 S> */ B(LdaZero),
B(Star), R(1),
/* 35 S> */ B(LdaSmi), I8(10),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 35 E> */ B(TestLessThan), R(1), U8(3),
Skip hole initialization of lexical variables when possible This patch expands scope analysis to skip hole initialization when it can be determined statically that no hole checks will be generated at runtime. Two conditions must be met to safely eliminate hole initialization: - There must not exist a VariableProxy referencing this Variable whose HoleCheckMode is kRequired - The Variable must be stack allocated; any other allocation implies that it may be accessed from not-yet-analyzed scopes (other modules, inner functions, or eval code) and that code may require hole checks. The new logic required removing debug code in full-codegen which is now incorrect in some cases. Also fixed Variable's bitfield helpers to take no more space than needed. Bug: chromium:651637 Change-Id: Ie5ac326af4e05b7a5c3c37cd4d0afba6a51a504d Reviewed-on: https://chromium-review.googlesource.com/494006 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45170}
2017-05-08 18:55:54 +00:00
B(JumpIfFalse), U8(15),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 17 E> */ B(StackCheck),
/* 56 S> */ B(Mov), R(1), R(0),
/* 43 S> */ B(Ldar), R(0),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Inc), U8(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(1),
Skip hole initialization of lexical variables when possible This patch expands scope analysis to skip hole initialization when it can be determined statically that no hole checks will be generated at runtime. Two conditions must be met to safely eliminate hole initialization: - There must not exist a VariableProxy referencing this Variable whose HoleCheckMode is kRequired - The Variable must be stack allocated; any other allocation implies that it may be accessed from not-yet-analyzed scopes (other modules, inner functions, or eval code) and that code may require hole checks. The new logic required removing debug code in full-codegen which is now incorrect in some cases. Also fixed Variable's bitfield helpers to take no more space than needed. Bug: chromium:651637 Change-Id: Ie5ac326af4e05b7a5c3c37cd4d0afba6a51a504d Reviewed-on: https://chromium-review.googlesource.com/494006 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45170}
2017-05-08 18:55:54 +00:00
B(JumpLoop), U8(17), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
/* 61 S> */ B(Return),
]
constant pool: [
]
handlers: [
]
---
snippet: "
function f() {
for (let x = 0; x < 10; ++x) { eval('1'); }
}
f();
"
frame size: 14
parameter count: 1
bytecode array length: 168
bytecodes: [
B(CreateFunctionContext), U8(3),
B(PushContext), R(3),
B(Ldar), R(this),
B(StaCurrentContextSlot), U8(4),
B(CreateMappedArguments),
B(StaCurrentContextSlot), U8(6),
B(Ldar), R(new_target),
B(StaCurrentContextSlot), U8(5),
/* 10 E> */ B(StackCheck),
B(Ldar), R(closure),
B(CreateBlockContext), U8(0),
B(PushContext), R(4),
B(LdaTheHole),
B(StaCurrentContextSlot), U8(4),
/* 30 S> */ B(LdaZero),
/* 30 E> */ B(StaCurrentContextSlot), U8(4),
B(LdaCurrentContextSlot), U8(4),
B(Star), R(0),
B(LdaSmi), I8(1),
B(Star), R(1),
/* 59 E> */ B(StackCheck),
B(Ldar), R(closure),
B(CreateBlockContext), U8(1),
B(PushContext), R(5),
B(LdaTheHole),
B(StaCurrentContextSlot), U8(4),
B(Ldar), R(0),
B(StaCurrentContextSlot), U8(4),
B(LdaSmi), I8(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(TestEqual), R(1), U8(3),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(7),
B(LdaZero),
B(Star), R(1),
B(Jump), U8(8),
/* 43 S> */ B(LdaCurrentContextSlot), U8(4),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Inc), U8(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 43 E> */ B(StaCurrentContextSlot), U8(4),
B(LdaSmi), I8(1),
B(Star), R(2),
/* 35 S> */ B(LdaCurrentContextSlot), U8(4),
B(Star), R(6),
B(LdaSmi), I8(10),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 35 E> */ B(TestLessThan), R(6), U8(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(4),
B(Jump), U8(6),
B(PopContext), R(5),
B(Jump), U8(77),
B(LdaSmi), I8(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(TestEqual), R(2), U8(6),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(54),
/* 17 E> */ B(StackCheck),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 48 S> */ B(LdaLookupGlobalSlot), U8(2), U8(9), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(6),
B(LdaConstant), U8(3),
B(Star), R(7),
B(LdaZero),
B(Star), R(11),
B(LdaSmi), I8(31),
B(Star), R(12),
B(LdaSmi), I8(48),
B(Star), R(13),
B(Mov), R(6), R(8),
B(Mov), R(7), R(9),
B(Mov), R(closure), R(10),
B(CallRuntime), U16(Runtime::kResolvePossiblyDirectEval), R(8), U8(6),
B(Star), R(6),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 48 E> */ B(CallUndefinedReceiver1), R(6), R(7), U8(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
B(Star), R(2),
B(LdaCurrentContextSlot), U8(4),
B(Star), R(0),
B(JumpLoop), U8(56), I8(1),
B(LdaSmi), I8(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 59 E> */ B(TestEqual), R(2), U8(11),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(6),
B(PopContext), R(5),
B(Jump), U8(7),
B(PopContext), R(5),
B(JumpLoop), U8(125), I8(0),
B(PopContext), R(4),
B(LdaUndefined),
/* 61 S> */ B(Return),
]
constant pool: [
FIXED_ARRAY_TYPE,
FIXED_ARRAY_TYPE,
ONE_BYTE_INTERNALIZED_STRING_TYPE ["eval"],
ONE_BYTE_INTERNALIZED_STRING_TYPE ["1"],
]
handlers: [
]
---
snippet: "
function f() {
for (let x = 0; x < 10; ++x) { (function() { return x; })(); }
}
f();
"
frame size: 6
parameter count: 1
Skip hole initialization of lexical variables when possible This patch expands scope analysis to skip hole initialization when it can be determined statically that no hole checks will be generated at runtime. Two conditions must be met to safely eliminate hole initialization: - There must not exist a VariableProxy referencing this Variable whose HoleCheckMode is kRequired - The Variable must be stack allocated; any other allocation implies that it may be accessed from not-yet-analyzed scopes (other modules, inner functions, or eval code) and that code may require hole checks. The new logic required removing debug code in full-codegen which is now incorrect in some cases. Also fixed Variable's bitfield helpers to take no more space than needed. Bug: chromium:651637 Change-Id: Ie5ac326af4e05b7a5c3c37cd4d0afba6a51a504d Reviewed-on: https://chromium-review.googlesource.com/494006 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45170}
2017-05-08 18:55:54 +00:00
bytecode array length: 108
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
bytecodes: [
/* 10 E> */ B(StackCheck),
/* 30 S> */ B(LdaZero),
B(Star), R(0),
B(Star), R(1),
B(LdaSmi), I8(1),
B(Star), R(2),
/* 78 E> */ B(StackCheck),
B(Ldar), R(closure),
B(CreateBlockContext), U8(0),
B(PushContext), R(4),
B(LdaTheHole),
B(StaCurrentContextSlot), U8(4),
B(Ldar), R(1),
B(StaCurrentContextSlot), U8(4),
B(LdaSmi), I8(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(TestEqual), R(2), U8(3),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(7),
B(LdaZero),
B(Star), R(2),
B(Jump), U8(8),
/* 43 S> */ B(LdaCurrentContextSlot), U8(4),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Inc), U8(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 43 E> */ B(StaCurrentContextSlot), U8(4),
B(LdaSmi), I8(1),
B(Star), R(3),
/* 35 S> */ B(LdaCurrentContextSlot), U8(4),
B(Star), R(5),
B(LdaSmi), I8(10),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 35 E> */ B(TestLessThan), R(5), U8(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(4),
B(Jump), U8(6),
B(PopContext), R(4),
B(Jump), U8(45),
B(LdaSmi), I8(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(TestEqual), R(3), U8(6),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(22),
/* 17 E> */ B(StackCheck),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 48 S> */ B(CreateClosure), U8(1), U8(9), U8(2),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(5),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 74 E> */ B(CallUndefinedReceiver0), R(5), U8(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
B(Star), R(3),
B(LdaCurrentContextSlot), U8(4),
B(Star), R(1),
B(JumpLoop), U8(24), I8(1),
B(LdaSmi), I8(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 78 E> */ B(TestEqual), R(3), U8(10),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(6),
B(PopContext), R(4),
B(Jump), U8(7),
B(PopContext), R(4),
B(JumpLoop), U8(93), I8(0),
B(LdaUndefined),
/* 80 S> */ B(Return),
]
constant pool: [
FIXED_ARRAY_TYPE,
SHARED_FUNCTION_INFO_TYPE,
]
handlers: [
]
---
snippet: "
function f() {
for (let { x, y } = { x: 0, y: 3 }; y > 0; --y) { let z = x + y; }
}
f();
"
frame size: 6
parameter count: 1
Skip hole initialization of lexical variables when possible This patch expands scope analysis to skip hole initialization when it can be determined statically that no hole checks will be generated at runtime. Two conditions must be met to safely eliminate hole initialization: - There must not exist a VariableProxy referencing this Variable whose HoleCheckMode is kRequired - The Variable must be stack allocated; any other allocation implies that it may be accessed from not-yet-analyzed scopes (other modules, inner functions, or eval code) and that code may require hole checks. The new logic required removing debug code in full-codegen which is now incorrect in some cases. Also fixed Variable's bitfield helpers to take no more space than needed. Bug: chromium:651637 Change-Id: Ie5ac326af4e05b7a5c3c37cd4d0afba6a51a504d Reviewed-on: https://chromium-review.googlesource.com/494006 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45170}
2017-05-08 18:55:54 +00:00
bytecode array length: 68
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
bytecodes: [
/* 10 E> */ B(StackCheck),
[runtime] Don't store object literal boilerplates on first run Storing the boilerplate on the first run leads to memory ovehead for code that is run only once. Hence we directly return the creating literal on the first run and only start creating copies from the second run on. Bug: v8:6211 Change-Id: I69b96d124a5b594b991fdbcc76dbf935d973ffad Reviewed-on: https://chromium-review.googlesource.com/530688 Commit-Queue: Camillo Bruni <cbruni@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/heads/master@{#45975}
2017-06-16 10:07:41 +00:00
B(CreateObjectLiteral), U8(0), U8(3), U8(21), R(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Mov), R(4), R(3),
B(Ldar), R(3),
B(JumpIfUndefined), U8(6),
B(Ldar), R(3),
B(JumpIfNotNull), U8(16),
[parser] Better error message when destructuring against undefined/null Previously, when destructuring against null or undefined we would print: d8> var { x } = null (d8):1: TypeError: Cannot match against 'undefined' or 'null'. var { x } = null ^ TypeError: Cannot match against 'undefined' or 'null'. at (d8):1:1 The above message uses the term "match" which isn't a common term in JavaScript to describe destructuring. This message also doesn't provide the name of the property that fails destructuring. This patch changes the error message to be: d8> var { x } = null; (d8):1: TypeError: Cannot destructure property `x` of 'undefined' or 'null'. var { x } = null; ^ TypeError: Cannot destructure property `x` of 'undefined' or 'null'. at (d8):1:1 This patch changes the message to say "destructure" instead of "match". This patch adds support for printing property names that are string literals. We iterate through every property and pick the first string literal property name if it exists. This provides at least some feedback to the developer. This patch also makes the pointer point to the position of the property name that fails destructuring. For computed and numeric property names, we print a generic error: d8> var { 1: x } = null (d8):1: TypeError: Cannot destructure against 'undefined' or 'null'. var { 1: x } = null ^ TypeError: Cannot destructure against 'undefined' or 'null'. at (d8):1:1 Bug: v8:6499 Change-Id: I35b1ac749489828686f042975294b9926e2dfc53 Reviewed-on: https://chromium-review.googlesource.com/537341 Reviewed-by: Adam Klein <adamk@chromium.org> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org> Cr-Commit-Position: refs/heads/master@{#45965}
2017-06-15 21:24:37 +00:00
B(LdaSmi), I8(62),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(4),
B(LdaConstant), U8(1),
B(Star), R(5),
B(CallRuntime), U16(Runtime::kNewTypeError), R(4), U8(2),
[parser] Better error message when destructuring against undefined/null Previously, when destructuring against null or undefined we would print: d8> var { x } = null (d8):1: TypeError: Cannot match against 'undefined' or 'null'. var { x } = null ^ TypeError: Cannot match against 'undefined' or 'null'. at (d8):1:1 The above message uses the term "match" which isn't a common term in JavaScript to describe destructuring. This message also doesn't provide the name of the property that fails destructuring. This patch changes the error message to be: d8> var { x } = null; (d8):1: TypeError: Cannot destructure property `x` of 'undefined' or 'null'. var { x } = null; ^ TypeError: Cannot destructure property `x` of 'undefined' or 'null'. at (d8):1:1 This patch changes the message to say "destructure" instead of "match". This patch adds support for printing property names that are string literals. We iterate through every property and pick the first string literal property name if it exists. This provides at least some feedback to the developer. This patch also makes the pointer point to the position of the property name that fails destructuring. For computed and numeric property names, we print a generic error: d8> var { 1: x } = null (d8):1: TypeError: Cannot destructure against 'undefined' or 'null'. var { 1: x } = null ^ TypeError: Cannot destructure against 'undefined' or 'null'. at (d8):1:1 Bug: v8:6499 Change-Id: I35b1ac749489828686f042975294b9926e2dfc53 Reviewed-on: https://chromium-review.googlesource.com/537341 Reviewed-by: Adam Klein <adamk@chromium.org> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org> Cr-Commit-Position: refs/heads/master@{#45965}
2017-06-15 21:24:37 +00:00
/* 28 E> */ B(Throw),
/* 37 S> */ B(LdaNamedProperty), R(3), U8(1), U8(6),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(1),
[parser] Better error message when destructuring against undefined/null Previously, when destructuring against null or undefined we would print: d8> var { x } = null (d8):1: TypeError: Cannot match against 'undefined' or 'null'. var { x } = null ^ TypeError: Cannot match against 'undefined' or 'null'. at (d8):1:1 The above message uses the term "match" which isn't a common term in JavaScript to describe destructuring. This message also doesn't provide the name of the property that fails destructuring. This patch changes the error message to be: d8> var { x } = null; (d8):1: TypeError: Cannot destructure property `x` of 'undefined' or 'null'. var { x } = null; ^ TypeError: Cannot destructure property `x` of 'undefined' or 'null'. at (d8):1:1 This patch changes the message to say "destructure" instead of "match". This patch adds support for printing property names that are string literals. We iterate through every property and pick the first string literal property name if it exists. This provides at least some feedback to the developer. This patch also makes the pointer point to the position of the property name that fails destructuring. For computed and numeric property names, we print a generic error: d8> var { 1: x } = null (d8):1: TypeError: Cannot destructure against 'undefined' or 'null'. var { 1: x } = null ^ TypeError: Cannot destructure against 'undefined' or 'null'. at (d8):1:1 Bug: v8:6499 Change-Id: I35b1ac749489828686f042975294b9926e2dfc53 Reviewed-on: https://chromium-review.googlesource.com/537341 Reviewed-by: Adam Klein <adamk@chromium.org> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org> Cr-Commit-Position: refs/heads/master@{#45965}
2017-06-15 21:24:37 +00:00
/* 37 S> */ B(LdaNamedProperty), R(3), U8(2), U8(8),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(2),
/* 55 S> */ B(LdaZero),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 55 E> */ B(TestGreaterThan), R(2), U8(10),
Skip hole initialization of lexical variables when possible This patch expands scope analysis to skip hole initialization when it can be determined statically that no hole checks will be generated at runtime. Two conditions must be met to safely eliminate hole initialization: - There must not exist a VariableProxy referencing this Variable whose HoleCheckMode is kRequired - The Variable must be stack allocated; any other allocation implies that it may be accessed from not-yet-analyzed scopes (other modules, inner functions, or eval code) and that code may require hole checks. The new logic required removing debug code in full-codegen which is now incorrect in some cases. Also fixed Variable's bitfield helpers to take no more space than needed. Bug: chromium:651637 Change-Id: Ie5ac326af4e05b7a5c3c37cd4d0afba6a51a504d Reviewed-on: https://chromium-review.googlesource.com/494006 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45170}
2017-05-08 18:55:54 +00:00
B(JumpIfFalse), U8(19),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 17 E> */ B(StackCheck),
[inspector] moved var initialization break location before init expression (reland) This CL improves break locations for expressions like 'var a = <expr>'. Without CL we use <expr> position as break location for initialization statement, with this CL we use position of first character after '=' as position. Benefits (see test for details): - only one break in expressions which includes mix of property lookup and calls, e.g. var p = Promise.resolve().then(x => x * 2), - removed redundant break location for expressions like: let { x, y } = { x: 1, y: 2}. TBR=dgozman@chromium.org,rmcilroy@chromium.org,machenbach@chromium.org,marja@chromium.org,kozyatinskiy@chromium.org,devtools-reviews@chromium.org,v8-reviews@googlegroups.com # Not skipping CQ checks because original CL landed > 1 day ago. Bug: v8:5909 Change-Id: Ie84fa79afeed09e28cf8478ba610a0cfbfdfc294 Reviewed-on: https://chromium-review.googlesource.com/518116 Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45598}
2017-05-30 12:25:55 +00:00
/* 75 S> */ B(Ldar), R(2),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
/* 77 E> */ B(Add), R(1), U8(12),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(0),
/* 62 S> */ B(Ldar), R(2),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Dec), U8(11),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Star), R(2),
Skip hole initialization of lexical variables when possible This patch expands scope analysis to skip hole initialization when it can be determined statically that no hole checks will be generated at runtime. Two conditions must be met to safely eliminate hole initialization: - There must not exist a VariableProxy referencing this Variable whose HoleCheckMode is kRequired - The Variable must be stack allocated; any other allocation implies that it may be accessed from not-yet-analyzed scopes (other modules, inner functions, or eval code) and that code may require hole checks. The new logic required removing debug code in full-codegen which is now incorrect in some cases. Also fixed Variable's bitfield helpers to take no more space than needed. Bug: chromium:651637 Change-Id: Ie5ac326af4e05b7a5c3c37cd4d0afba6a51a504d Reviewed-on: https://chromium-review.googlesource.com/494006 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#45170}
2017-05-08 18:55:54 +00:00
B(JumpLoop), U8(20), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
/* 84 S> */ B(Return),
]
constant pool: [
FIXED_ARRAY_TYPE,
ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
ONE_BYTE_INTERNALIZED_STRING_TYPE ["y"],
]
handlers: [
]
---
snippet: "
function* f() {
for (let x = 0; x < 10; ++x) { let y = x; }
}
f();
"
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
frame size: 11
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
parameter count: 1
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
bytecode array length: 172
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
bytecodes: [
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Mov), R(new_target), R(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Ldar), R(new_target),
[Interpreter] Handle various generator intrinsics We can avoid some runtime calls by implementing intrinsics. BUG= Review-Url: https://codereview.chromium.org/2889973002 Cr-Commit-Position: refs/heads/master@{#45418}
2017-05-19 09:27:25 +00:00
B(JumpIfUndefined), U8(25),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(7), U8(1),
B(PushContext), R(9),
B(RestoreGeneratorState), R(7),
B(Star), R(8),
[ignition] Introduce Switch bytecode for generators Introduce a new SwitchSmiTable bytecode for generators, which does a table lookup for the accumulator value in a jump table stored in the constant array pool. This removes the if-else chains at resumable function/loop headers. As a drive-by, add a scoped environment saving struct to the bytecode graph builder. Bug: v8:6351 Bug: v8:6366 Change-Id: I63be15a8b599d6684c7df19dedb8860562678fb0 Reviewed-on: https://chromium-review.googlesource.com/500271 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#45314}
2017-05-15 16:31:05 +00:00
B(SwitchOnSmiNoFeedback), U8(0), U8(1), I8(0),
Revert "[compiler] Drive optimizations with feedback vector" This reverts commit e39c9e020f53f161fff2bf8c617aa01f9459f31a. Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561 Original change's description: > [compiler] Drive optimizations with feedback vector > > For interpreted functions, use the optimized code slot in the feedback vector > to store an optimization marker (optimize/in optimization queue) rather than > changing the JSFunction's code object. Then, adapt the self-healing mechanism > to also dispatch based on this optimization marker. Similarly, replace SFI > marking with optimization marker checks in CompileLazy. > > This allows JSFunctions to share optimization information (replacing shared > function marking) without leaking this information across native contexts. Non > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which > generalises the old CompileOptimized/InOptimizationQueue builtins and also > checks the same optimization marker as CompileLazy and > InterpreterEntryTrampoline. > > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae > Reviewed-on: https://chromium-review.googlesource.com/509716 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> > Cr-Commit-Position: refs/heads/master@{#45901} TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94 Reviewed-on: https://chromium-review.googlesource.com/532916 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45903}
2017-06-13 13:24:05 +00:00
B(LdaSmi), I8(79),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
B(CallRuntime), U16(Runtime::kAbort), R(9), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(8),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Mov), R(closure), R(9),
B(Mov), R(this), R(10),
B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(9), U8(2),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(3),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 11 E> */ B(StackCheck),
B(LdaZero),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Mov), R(3), R(7),
B(Mov), R(3), R(9),
/* 11 E> */ B(SuspendGenerator), R(7), R(0), U8(9), U8(0),
B(Ldar), R(9),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 62 S> */ B(Return),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(RestoreGeneratorRegisters), R(7), R(0), U8(9),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(8),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(7), U8(1),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(7), U8(1),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(SwitchOnSmiNoFeedback), U8(1), U8(2), I8(0),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(9),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
/* 11 E> */ B(Throw),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(9),
/* 62 S> */ B(Return),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 31 S> */ B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(2),
B(Star), R(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(5),
/* 60 E> */ B(StackCheck),
B(Mov), R(4), R(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(TestEqual), R(5), U8(3),
B(JumpIfFalse), U8(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Jump), U8(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 44 S> */ B(Ldar), R(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Inc), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(6),
/* 36 S> */ B(LdaSmi), I8(10),
/* 36 E> */ B(TestLessThan), R(1), U8(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Jump), U8(4),
B(Jump), U8(36),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(TestEqual), R(6), U8(6),
B(JumpIfFalse), U8(17),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 18 E> */ B(StackCheck),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 57 S> */ B(Mov), R(1), R(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(6),
B(Mov), R(0), R(4),
[ignition] Fix register flushing performance issue In some codes flushing the registers was costly: we processed each register whereas all the registers alone in their equivalence class need not to be processed. We now overapproximate easily which classes are of size 2 so as to save many iterations in the Flush() loop in some cases. Bug: v8:6432 Change-Id: I945e151736e8a515263ac76312127d930fd20d74 Reviewed-on: https://chromium-review.googlesource.com/525795 Commit-Queue: Alexandre Talon <alexandret@google.com> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45805}
2017-06-09 09:26:27 +00:00
B(Ldar), R(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(JumpLoop), U8(19), I8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 60 E> */ B(TestEqual), R(6), U8(7),
B(JumpIfFalse), U8(4),
B(Jump), U8(5),
B(JumpLoop), U8(68), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
/* 62 S> */ B(Return),
]
constant pool: [
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
Smi [45],
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
Smi [10],
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
Smi [7],
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
]
handlers: [
]
---
snippet: "
function* f() {
for (let x = 0; x < 10; ++x) yield x;
}
f();
"
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
frame size: 11
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
parameter count: 1
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
bytecode array length: 260
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
bytecodes: [
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Mov), R(new_target), R(6),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Ldar), R(new_target),
[Interpreter] Handle various generator intrinsics We can avoid some runtime calls by implementing intrinsics. BUG= Review-Url: https://codereview.chromium.org/2889973002 Cr-Commit-Position: refs/heads/master@{#45418}
2017-05-19 09:27:25 +00:00
B(JumpIfUndefined), U8(25),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(6), U8(1),
B(PushContext), R(8),
B(RestoreGeneratorState), R(6),
B(Star), R(7),
[ignition] Introduce Switch bytecode for generators Introduce a new SwitchSmiTable bytecode for generators, which does a table lookup for the accumulator value in a jump table stored in the constant array pool. This removes the if-else chains at resumable function/loop headers. As a drive-by, add a scoped environment saving struct to the bytecode graph builder. Bug: v8:6351 Bug: v8:6366 Change-Id: I63be15a8b599d6684c7df19dedb8860562678fb0 Reviewed-on: https://chromium-review.googlesource.com/500271 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#45314}
2017-05-15 16:31:05 +00:00
B(SwitchOnSmiNoFeedback), U8(0), U8(2), I8(0),
Revert "[compiler] Drive optimizations with feedback vector" This reverts commit e39c9e020f53f161fff2bf8c617aa01f9459f31a. Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561 Original change's description: > [compiler] Drive optimizations with feedback vector > > For interpreted functions, use the optimized code slot in the feedback vector > to store an optimization marker (optimize/in optimization queue) rather than > changing the JSFunction's code object. Then, adapt the self-healing mechanism > to also dispatch based on this optimization marker. Similarly, replace SFI > marking with optimization marker checks in CompileLazy. > > This allows JSFunctions to share optimization information (replacing shared > function marking) without leaking this information across native contexts. Non > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which > generalises the old CompileOptimized/InOptimizationQueue builtins and also > checks the same optimization marker as CompileLazy and > InterpreterEntryTrampoline. > > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae > Reviewed-on: https://chromium-review.googlesource.com/509716 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> > Cr-Commit-Position: refs/heads/master@{#45901} TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94 Reviewed-on: https://chromium-review.googlesource.com/532916 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45903}
2017-06-13 13:24:05 +00:00
B(LdaSmi), I8(79),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(8),
B(CallRuntime), U16(Runtime::kAbort), R(8), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(7),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Mov), R(closure), R(8),
B(Mov), R(this), R(9),
B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(8), U8(2),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(2),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 11 E> */ B(StackCheck),
B(LdaZero),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Mov), R(2), R(6),
B(Mov), R(2), R(8),
/* 11 E> */ B(SuspendGenerator), R(6), R(0), U8(8), U8(0),
B(Ldar), R(8),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 56 S> */ B(Return),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(RestoreGeneratorRegisters), R(6), R(0), U8(8),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(7),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(6), U8(1),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(8),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(6), U8(1),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(SwitchOnSmiNoFeedback), U8(2), U8(2), I8(0),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(8),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
/* 11 E> */ B(Throw),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(8),
/* 56 S> */ B(Return),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 31 S> */ B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(1),
B(Star), R(3),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(4),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Ldar), R(7),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(SwitchOnSmiNoFeedback), U8(4), U8(1), I8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
/* 54 E> */ B(TestEqualStrictNoFeedback), R(7),
[ignition] Introduce Switch bytecode for generators Introduce a new SwitchSmiTable bytecode for generators, which does a table lookup for the accumulator value in a jump table stored in the constant array pool. This removes the if-else chains at resumable function/loop headers. As a drive-by, add a scoped environment saving struct to the bytecode graph builder. Bug: v8:6351 Bug: v8:6366 Change-Id: I63be15a8b599d6684c7df19dedb8860562678fb0 Reviewed-on: https://chromium-review.googlesource.com/500271 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#45314}
2017-05-15 16:31:05 +00:00
B(JumpIfTrue), U8(11),
Revert "[compiler] Drive optimizations with feedback vector" This reverts commit e39c9e020f53f161fff2bf8c617aa01f9459f31a. Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561 Original change's description: > [compiler] Drive optimizations with feedback vector > > For interpreted functions, use the optimized code slot in the feedback vector > to store an optimization marker (optimize/in optimization queue) rather than > changing the JSFunction's code object. Then, adapt the self-healing mechanism > to also dispatch based on this optimization marker. Similarly, replace SFI > marking with optimization marker checks in CompileLazy. > > This allows JSFunctions to share optimization information (replacing shared > function marking) without leaking this information across native contexts. Non > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which > generalises the old CompileOptimized/InOptimizationQueue builtins and also > checks the same optimization marker as CompileLazy and > InterpreterEntryTrampoline. > > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae > Reviewed-on: https://chromium-review.googlesource.com/509716 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> > Cr-Commit-Position: refs/heads/master@{#45901} TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94 Reviewed-on: https://chromium-review.googlesource.com/532916 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45903}
2017-06-13 13:24:05 +00:00
B(LdaSmi), I8(79),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(8),
B(CallRuntime), U16(Runtime::kAbort), R(8), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(StackCheck),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Mov), R(3), R(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(TestEqual), R(4), U8(3),
B(JumpIfFalse), U8(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Jump), U8(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 44 S> */ B(Ldar), R(0),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Inc), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(5),
/* 36 S> */ B(LdaSmi), I8(10),
/* 36 E> */ B(TestLessThan), R(0), U8(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Jump), U8(4),
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
B(Jump), U8(103),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Ldar), R(7),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(SwitchOnSmiNoFeedback), U8(5), U8(1), I8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(TestEqualStrictNoFeedback), R(7),
[ignition] Introduce Switch bytecode for generators Introduce a new SwitchSmiTable bytecode for generators, which does a table lookup for the accumulator value in a jump table stored in the constant array pool. This removes the if-else chains at resumable function/loop headers. As a drive-by, add a scoped environment saving struct to the bytecode graph builder. Bug: v8:6351 Bug: v8:6366 Change-Id: I63be15a8b599d6684c7df19dedb8860562678fb0 Reviewed-on: https://chromium-review.googlesource.com/500271 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#45314}
2017-05-15 16:31:05 +00:00
B(JumpIfTrue), U8(11),
Revert "[compiler] Drive optimizations with feedback vector" This reverts commit e39c9e020f53f161fff2bf8c617aa01f9459f31a. Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561 Original change's description: > [compiler] Drive optimizations with feedback vector > > For interpreted functions, use the optimized code slot in the feedback vector > to store an optimization marker (optimize/in optimization queue) rather than > changing the JSFunction's code object. Then, adapt the self-healing mechanism > to also dispatch based on this optimization marker. Similarly, replace SFI > marking with optimization marker checks in CompileLazy. > > This allows JSFunctions to share optimization information (replacing shared > function marking) without leaking this information across native contexts. Non > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which > generalises the old CompileOptimized/InOptimizationQueue builtins and also > checks the same optimization marker as CompileLazy and > InterpreterEntryTrampoline. > > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae > Reviewed-on: https://chromium-review.googlesource.com/509716 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> > Cr-Commit-Position: refs/heads/master@{#45901} TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94 Reviewed-on: https://chromium-review.googlesource.com/532916 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45903}
2017-06-13 13:24:05 +00:00
B(LdaSmi), I8(79),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(8),
B(CallRuntime), U16(Runtime::kAbort), R(8), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(TestEqual), R(5), U8(6),
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
B(JumpIfFalse), U8(63),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 18 E> */ B(StackCheck),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
/* 47 S> */ B(LdaSmi), I8(1),
B(Mov), R(0), R(8),
B(SuspendGenerator), R(6), R(0), U8(8), U8(0),
B(LdaFalse),
B(Star), R(10),
B(Mov), R(8), R(9),
B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(9), U8(2),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 56 S> */ B(Return),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(RestoreGeneratorRegisters), R(6), R(0), U8(8),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(7),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(6), U8(1),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(8),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(6), U8(1),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(SwitchOnSmiNoFeedback), U8(6), U8(2), I8(0),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(8),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
/* 47 E> */ B(Throw),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(8),
/* 56 S> */ B(Return),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(5),
B(Mov), R(0), R(3),
[ignition] Fix register flushing performance issue In some codes flushing the registers was costly: we processed each register whereas all the registers alone in their equivalence class need not to be processed. We now overapproximate easily which classes are of size 2 so as to save many iterations in the Flush() loop in some cases. Bug: v8:6432 Change-Id: I945e151736e8a515263ac76312127d930fd20d74 Reviewed-on: https://chromium-review.googlesource.com/525795 Commit-Queue: Alexandre Talon <alexandret@google.com> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45805}
2017-06-09 09:26:27 +00:00
B(Ldar), R(3),
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
B(JumpLoop), U8(86), I8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 54 E> */ B(TestEqual), R(5), U8(7),
B(JumpIfFalse), U8(4),
B(Jump), U8(5),
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
B(JumpLoop), U8(156), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
/* 56 S> */ B(Return),
]
constant pool: [
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
Smi [45],
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
Smi [82],
Smi [10],
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
Smi [7],
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
Smi [56],
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
Smi [48],
Move closing of generators upon final return to the generator-resume builtin. Review-Url: https://codereview.chromium.org/2936813002 Cr-Commit-Position: refs/heads/master@{#45906}
2017-06-13 13:49:45 +00:00
Smi [10],
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
Smi [7],
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
]
handlers: [
]
---
snippet: "
async function f() {
for (let x = 0; x < 10; ++x) { let y = x; }
}
f();
"
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
frame size: 17
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
parameter count: 1
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
bytecode array length: 207
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
bytecodes: [
[ignition] Move generator object creation to BytecodeGenerator This lets us avoid allocating the "this" variable for every generator, since the BytecodeGenerator can directly read the receiver via BytecodeArrayBuilder::Receive() when passing it into %_CreateJSGeneratorObject. Bug: v8:6351 Change-Id: Ib5e1f3303b6b5d5fc051ce76ea62129fd6afac65 Reviewed-on: https://chromium-review.googlesource.com/500507 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Caitlin Potter <caitp@igalia.com> Cr-Commit-Position: refs/heads/master@{#45281}
2017-05-12 17:29:53 +00:00
/* 16 E> */ B(StackCheck),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(8),
B(CallJSRuntime), U8(%async_function_promise_create), R(8), U8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(7),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Mov), R(context), R(10),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Mov), R(context), R(11),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 36 S> */ B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(2),
B(Star), R(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(5),
/* 65 E> */ B(StackCheck),
B(Mov), R(4), R(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(TestEqual), R(5), U8(3),
B(JumpIfFalse), U8(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Jump), U8(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 49 S> */ B(Ldar), R(1),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Inc), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(6),
/* 41 S> */ B(LdaSmi), I8(10),
/* 41 E> */ B(TestLessThan), R(1), U8(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Jump), U8(4),
B(Jump), U8(36),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(TestEqual), R(6), U8(6),
B(JumpIfFalse), U8(17),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 23 E> */ B(StackCheck),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 62 S> */ B(Mov), R(1), R(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(6),
B(Mov), R(0), R(4),
[ignition] Fix register flushing performance issue In some codes flushing the registers was costly: we processed each register whereas all the registers alone in their equivalence class need not to be processed. We now overapproximate easily which classes are of size 2 so as to save many iterations in the Flush() loop in some cases. Bug: v8:6432 Change-Id: I945e151736e8a515263ac76312127d930fd20d74 Reviewed-on: https://chromium-review.googlesource.com/525795 Commit-Queue: Alexandre Talon <alexandret@google.com> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45805}
2017-06-09 09:26:27 +00:00
B(Ldar), R(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(JumpLoop), U8(19), I8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 65 E> */ B(TestEqual), R(6), U8(7),
B(JumpIfFalse), U8(4),
B(Jump), U8(5),
B(JumpLoop), U8(68), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(12),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(14),
B(Mov), R(7), R(13),
B(CallJSRuntime), U8(%promise_resolve), R(12), U8(3),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(8),
B(Mov), R(7), R(9),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Jump), U8(59),
B(Jump), U8(45),
B(Star), R(12),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Ldar), R(closure),
B(CreateCatchContext), R(12), U8(0), U8(1),
B(Star), R(11),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaTheHole),
B(SetPendingMessage),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Ldar), R(11),
B(PushContext), R(12),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(13),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaImmutableCurrentContextSlot), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(15),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaFalse),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(16),
B(Mov), R(7), R(14),
B(CallJSRuntime), U8(%promise_internal_reject), R(13), U8(4),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(PopContext), R(12),
[ignition] Re-use deferred return/rethrow commands Since deferred return/async return/rethrow commands don't have an associated statement, we can reuse their entries in the deferred command list. Bug: v8:4280 Bug: v8:6218 Change-Id: Ic51fb735d4ea13ebea1d5e456ec5689c0d98a4ac Reviewed-on: https://chromium-review.googlesource.com/506077 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45344}
2017-05-16 15:20:09 +00:00
B(LdaZero),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(8),
B(Mov), R(7), R(9),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Jump), U8(14),
B(LdaSmi), I8(-1),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(8),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Jump), U8(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(9),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(LdaSmi), I8(1),
B(Star), R(8),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaTheHole),
B(SetPendingMessage),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(10),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Star), R(11),
B(Mov), R(7), R(12),
B(CallJSRuntime), U8(%async_function_promise_release), R(11), U8(2),
B(Ldar), R(10),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(SetPendingMessage),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Ldar), R(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(SwitchOnSmiNoFeedback), U8(2), U8(2), I8(0),
[ignition] Re-use deferred return/rethrow commands Since deferred return/async return/rethrow commands don't have an associated statement, we can reuse their entries in the deferred command list. Bug: v8:4280 Bug: v8:6218 Change-Id: Ic51fb735d4ea13ebea1d5e456ec5689c0d98a4ac Reviewed-on: https://chromium-review.googlesource.com/506077 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45344}
2017-05-16 15:20:09 +00:00
B(Jump), U8(8),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Ldar), R(9),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 67 S> */ B(Return),
[Interpreter] Allocate context registers as temporary registers. Rather than trying to pre-calculate the number of contexts required during scope analysis, instead just allocate context registers in the register allocator. This reduces frame size a bit due to reusing of registers when the context isn't pushed. BUG=v8:6322, chromium:716265 Change-Id: I145e38fcb3797a3b86c91e90ea9326a6e55b9b89 Reviewed-on: https://chromium-review.googlesource.com/514087 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45522}
2017-05-24 15:48:27 +00:00
B(Ldar), R(9),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(ReThrow),
B(LdaUndefined),
/* 67 S> */ B(Return),
]
constant pool: [
ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
FIXED_ARRAY_TYPE,
[ignition] Use jump table for "finally" deferred commands Bug: v8:6218 Change-Id: I5d245ea485c93fcc03fcd95c82ae0474f31ffa5e Reviewed-on: https://chromium-review.googlesource.com/505491 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45341}
2017-05-16 11:36:04 +00:00
Smi [6],
Smi [9],
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
]
handlers: [
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
[13, 162, 168],
[16, 117, 119],
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
]
---
snippet: "
async function f() {
for (let x = 0; x < 10; ++x) await x;
}
f();
"
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
frame size: 18
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
parameter count: 1
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
bytecode array length: 356
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
bytecodes: [
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Mov), R(new_target), R(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Ldar), R(new_target),
[Interpreter] Handle various generator intrinsics We can avoid some runtime calls by implementing intrinsics. BUG= Review-Url: https://codereview.chromium.org/2889973002 Cr-Commit-Position: refs/heads/master@{#45418}
2017-05-19 09:27:25 +00:00
B(JumpIfUndefined), U8(25),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(7), U8(1),
B(PushContext), R(9),
B(RestoreGeneratorState), R(7),
B(Star), R(8),
[ignition] Introduce Switch bytecode for generators Introduce a new SwitchSmiTable bytecode for generators, which does a table lookup for the accumulator value in a jump table stored in the constant array pool. This removes the if-else chains at resumable function/loop headers. As a drive-by, add a scoped environment saving struct to the bytecode graph builder. Bug: v8:6351 Bug: v8:6366 Change-Id: I63be15a8b599d6684c7df19dedb8860562678fb0 Reviewed-on: https://chromium-review.googlesource.com/500271 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#45314}
2017-05-15 16:31:05 +00:00
B(SwitchOnSmiNoFeedback), U8(0), U8(1), I8(0),
Revert "[compiler] Drive optimizations with feedback vector" This reverts commit e39c9e020f53f161fff2bf8c617aa01f9459f31a. Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561 Original change's description: > [compiler] Drive optimizations with feedback vector > > For interpreted functions, use the optimized code slot in the feedback vector > to store an optimization marker (optimize/in optimization queue) rather than > changing the JSFunction's code object. Then, adapt the self-healing mechanism > to also dispatch based on this optimization marker. Similarly, replace SFI > marking with optimization marker checks in CompileLazy. > > This allows JSFunctions to share optimization information (replacing shared > function marking) without leaking this information across native contexts. Non > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which > generalises the old CompileOptimized/InOptimizationQueue builtins and also > checks the same optimization marker as CompileLazy and > InterpreterEntryTrampoline. > > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae > Reviewed-on: https://chromium-review.googlesource.com/509716 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> > Cr-Commit-Position: refs/heads/master@{#45901} TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94 Reviewed-on: https://chromium-review.googlesource.com/532916 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45903}
2017-06-13 13:24:05 +00:00
B(LdaSmi), I8(79),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
B(CallRuntime), U16(Runtime::kAbort), R(9), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(8),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Mov), R(closure), R(9),
B(Mov), R(this), R(10),
B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(9), U8(2),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(2),
[ignition] Move generator object creation to BytecodeGenerator This lets us avoid allocating the "this" variable for every generator, since the BytecodeGenerator can directly read the receiver via BytecodeArrayBuilder::Receive() when passing it into %_CreateJSGeneratorObject. Bug: v8:6351 Change-Id: Ib5e1f3303b6b5d5fc051ce76ea62129fd6afac65 Reviewed-on: https://chromium-review.googlesource.com/500507 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Caitlin Potter <caitp@igalia.com> Cr-Commit-Position: refs/heads/master@{#45281}
2017-05-12 17:29:53 +00:00
/* 16 E> */ B(StackCheck),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
B(CallJSRuntime), U8(%async_function_promise_create), R(9), U8(1),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(Star), R(3),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Mov), R(2), R(7),
[ignition] Fix register flushing performance issue In some codes flushing the registers was costly: we processed each register whereas all the registers alone in their equivalence class need not to be processed. We now overapproximate easily which classes are of size 2 so as to save many iterations in the Flush() loop in some cases. Bug: v8:6432 Change-Id: I945e151736e8a515263ac76312127d930fd20d74 Reviewed-on: https://chromium-review.googlesource.com/525795 Commit-Queue: Alexandre Talon <alexandret@google.com> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45805}
2017-06-09 09:26:27 +00:00
B(Mov), R(context), R(11),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Mov), R(context), R(12),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 36 S> */ B(LdaZero),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(1),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(Star), R(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(Star), R(5),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Ldar), R(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(SwitchOnSmiNoFeedback), U8(1), U8(1), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
/* 59 E> */ B(TestEqualStrictNoFeedback), R(8),
[ignition] Introduce Switch bytecode for generators Introduce a new SwitchSmiTable bytecode for generators, which does a table lookup for the accumulator value in a jump table stored in the constant array pool. This removes the if-else chains at resumable function/loop headers. As a drive-by, add a scoped environment saving struct to the bytecode graph builder. Bug: v8:6351 Bug: v8:6366 Change-Id: I63be15a8b599d6684c7df19dedb8860562678fb0 Reviewed-on: https://chromium-review.googlesource.com/500271 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#45314}
2017-05-15 16:31:05 +00:00
B(JumpIfTrue), U8(11),
Revert "[compiler] Drive optimizations with feedback vector" This reverts commit e39c9e020f53f161fff2bf8c617aa01f9459f31a. Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561 Original change's description: > [compiler] Drive optimizations with feedback vector > > For interpreted functions, use the optimized code slot in the feedback vector > to store an optimization marker (optimize/in optimization queue) rather than > changing the JSFunction's code object. Then, adapt the self-healing mechanism > to also dispatch based on this optimization marker. Similarly, replace SFI > marking with optimization marker checks in CompileLazy. > > This allows JSFunctions to share optimization information (replacing shared > function marking) without leaking this information across native contexts. Non > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which > generalises the old CompileOptimized/InOptimizationQueue builtins and also > checks the same optimization marker as CompileLazy and > InterpreterEntryTrampoline. > > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae > Reviewed-on: https://chromium-review.googlesource.com/509716 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> > Cr-Commit-Position: refs/heads/master@{#45901} TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94 Reviewed-on: https://chromium-review.googlesource.com/532916 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45903}
2017-06-13 13:24:05 +00:00
B(LdaSmi), I8(79),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(13),
B(CallRuntime), U16(Runtime::kAbort), R(13), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(StackCheck),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(Mov), R(4), R(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(TestEqual), R(5), U8(3),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(JumpIfFalse), U8(7),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(Star), R(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Jump), U8(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 49 S> */ B(Ldar), R(0),
Reland: [TypeFeedbackVector] Store optimized code in the vector Since the feedback vector is itself a native context structure, why not store optimized code for a function in there rather than in a map from native context to code? This allows us to get rid of the optimized code map in the SharedFunctionInfo, saving a pointer, and making lookup of any optimized code quicker. Original patch by Michael Stanton <mvstanton@chromium.org> BUG=v8:6246,chromium:718891 TBR=yangguo@chromium.org,ulan@chromium.org Change-Id: I3bb9ec0cfff32e667cca0e1403f964f33a6958a6 Reviewed-on: https://chromium-review.googlesource.com/500134 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45234}
2017-05-09 21:45:33 +00:00
B(Inc), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Star), R(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(Star), R(6),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
/* 41 S> */ B(LdaSmi), I8(10),
/* 41 E> */ B(TestLessThan), R(0), U8(5),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(JumpIfFalse), U8(4),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Jump), U8(4),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Jump), U8(115),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Ldar), R(8),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(SwitchOnSmiNoFeedback), U8(2), U8(1), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(TestEqualStrictNoFeedback), R(8),
[ignition] Introduce Switch bytecode for generators Introduce a new SwitchSmiTable bytecode for generators, which does a table lookup for the accumulator value in a jump table stored in the constant array pool. This removes the if-else chains at resumable function/loop headers. As a drive-by, add a scoped environment saving struct to the bytecode graph builder. Bug: v8:6351 Bug: v8:6366 Change-Id: I63be15a8b599d6684c7df19dedb8860562678fb0 Reviewed-on: https://chromium-review.googlesource.com/500271 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#45314}
2017-05-15 16:31:05 +00:00
B(JumpIfTrue), U8(11),
Revert "[compiler] Drive optimizations with feedback vector" This reverts commit e39c9e020f53f161fff2bf8c617aa01f9459f31a. Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561 Original change's description: > [compiler] Drive optimizations with feedback vector > > For interpreted functions, use the optimized code slot in the feedback vector > to store an optimization marker (optimize/in optimization queue) rather than > changing the JSFunction's code object. Then, adapt the self-healing mechanism > to also dispatch based on this optimization marker. Similarly, replace SFI > marking with optimization marker checks in CompileLazy. > > This allows JSFunctions to share optimization information (replacing shared > function marking) without leaking this information across native contexts. Non > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which > generalises the old CompileOptimized/InOptimizationQueue builtins and also > checks the same optimization marker as CompileLazy and > InterpreterEntryTrampoline. > > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae > Reviewed-on: https://chromium-review.googlesource.com/509716 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> > Cr-Commit-Position: refs/heads/master@{#45901} TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94 Reviewed-on: https://chromium-review.googlesource.com/532916 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45903}
2017-06-13 13:24:05 +00:00
B(LdaSmi), I8(79),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(13),
B(CallRuntime), U16(Runtime::kAbort), R(13), U8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(TestEqual), R(6), U8(6),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(JumpIfFalse), U8(75),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 23 E> */ B(StackCheck),
/* 52 S> */ B(LdaUndefined),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(13),
B(Mov), R(2), R(14),
B(Mov), R(0), R(15),
B(Mov), R(3), R(16),
/* 58 E> */ B(CallJSRuntime), U8(%async_function_await_uncaught), R(13), U8(4),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Mov), R(3), R(13),
B(SuspendGenerator), R(7), R(0), U8(13), U8(2),
B(Ldar), R(13),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 61 S> */ B(Return),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(RestoreGeneratorRegisters), R(7), R(0), U8(13),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(-2),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(8),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(7), U8(1),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(13),
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(7), U8(1),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(SwitchOnSmiNoFeedback), U8(3), U8(2), I8(0),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(13),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
/* 52 E> */ B(ReThrow),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(LdaZero),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
B(Mov), R(13), R(10),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(Jump), U8(103),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaZero),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
B(Star), R(6),
B(Mov), R(0), R(4),
[ignition] Fix register flushing performance issue In some codes flushing the registers was costly: we processed each register whereas all the registers alone in their equivalence class need not to be processed. We now overapproximate easily which classes are of size 2 so as to save many iterations in the Flush() loop in some cases. Bug: v8:6432 Change-Id: I945e151736e8a515263ac76312127d930fd20d74 Reviewed-on: https://chromium-review.googlesource.com/525795 Commit-Queue: Alexandre Talon <alexandret@google.com> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45805}
2017-06-09 09:26:27 +00:00
B(Ldar), R(4),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(JumpLoop), U8(98), I8(1),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaSmi), I8(1),
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
/* 59 E> */ B(TestEqual), R(6), U8(7),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(JumpIfFalse), U8(4),
B(Jump), U8(5),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(JumpLoop), U8(168), I8(0),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(13),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(15),
B(Mov), R(3), R(14),
B(CallJSRuntime), U8(%promise_resolve), R(13), U8(3),
[ignition] Re-use deferred return/rethrow commands Since deferred return/async return/rethrow commands don't have an associated statement, we can reuse their entries in the deferred command list. Bug: v8:4280 Bug: v8:6218 Change-Id: Ic51fb735d4ea13ebea1d5e456ec5689c0d98a4ac Reviewed-on: https://chromium-review.googlesource.com/506077 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45344}
2017-05-16 15:20:09 +00:00
B(LdaZero),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
B(Mov), R(3), R(10),
Make non-Module generators only context allocate parameters. In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume. The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change. I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit. Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish. BUG=v8:6368 Review-Url: https://codereview.chromium.org/2898163002 Cr-Commit-Position: refs/heads/master@{#45515}
2017-05-24 13:54:57 +00:00
B(Jump), U8(59),
B(Jump), U8(45),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Star), R(13),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(closure),
B(CreateCatchContext), R(13), U8(5), U8(6),
B(Star), R(12),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaTheHole),
B(SetPendingMessage),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(12),
B(PushContext), R(13),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaUndefined),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(14),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaImmutableCurrentContextSlot), U8(4),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(16),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(LdaFalse),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(17),
B(Mov), R(3), R(15),
B(CallJSRuntime), U8(%promise_internal_reject), R(14), U8(4),
B(PopContext), R(13),
[ignition] Re-use deferred return/rethrow commands Since deferred return/async return/rethrow commands don't have an associated statement, we can reuse their entries in the deferred command list. Bug: v8:4280 Bug: v8:6218 Change-Id: Ic51fb735d4ea13ebea1d5e456ec5689c0d98a4ac Reviewed-on: https://chromium-review.googlesource.com/506077 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45344}
2017-05-16 15:20:09 +00:00
B(LdaZero),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
B(Mov), R(3), R(10),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(Jump), U8(14),
B(LdaSmi), I8(-1),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(9),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(Jump), U8(8),
B(Star), R(10),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(LdaSmi), I8(1),
B(Star), R(9),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(LdaTheHole),
B(SetPendingMessage),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(11),
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
B(LdaUndefined),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Star), R(12),
B(Mov), R(3), R(13),
B(CallJSRuntime), U8(%async_function_promise_release), R(12), U8(2),
B(Ldar), R(11),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(SetPendingMessage),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(9),
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
B(SwitchOnSmiNoFeedback), U8(7), U8(2), I8(0),
[ignition] Re-use deferred return/rethrow commands Since deferred return/async return/rethrow commands don't have an associated statement, we can reuse their entries in the deferred command list. Bug: v8:4280 Bug: v8:6218 Change-Id: Ic51fb735d4ea13ebea1d5e456ec5689c0d98a4ac Reviewed-on: https://chromium-review.googlesource.com/506077 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45344}
2017-05-16 15:20:09 +00:00
B(Jump), U8(8),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(10),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
/* 61 S> */ B(Return),
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
B(Ldar), R(10),
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
B(ReThrow),
B(LdaUndefined),
/* 61 S> */ B(Return),
]
constant pool: [
This is a first step towards reducing the number of stores/loads when suspending/resuming a generator. Unfortunately, even for an empty generator, we still use 8 register for various things (try-finally, copies of generator object, parser-introduced temporaries). I will try to get rid of these in separate CLs. Changes: - SuspendGenerator bytecode now takes register list to save. - ResumeGenerator was split into two bytecodes: * Resume generator reads the state out and marks the generator as 'executing'. * RestoreGeneratorRegisters reloads the registers from the generator. + this required adding support for output register list. - Introduced generator_object_ register in the bytecode generator. * in subsequent CLs, I will make better use of it, the goal is to get rid if the .generator_object local variable. - Taught register optimizer to flush unassigned registers. BUG=v8:6379 Review-Url: https://codereview.chromium.org/2894293003 Cr-Commit-Position: refs/heads/master@{#45675}
2017-06-02 11:55:48 +00:00
Smi [57],
[inspector] removed break location right before suspension in async function In current implementation in expressions like await foo() we have break location right after foo call and before actual await. And we additionally have a lot of other statement locations because of do scope. Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call. Bug: v8:6425,v8:6162 Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644 Reviewed-on: https://chromium-review.googlesource.com/514046 Reviewed-by: Marja Hölttä <marja@chromium.org> Reviewed-by: Dmitry Gozman <dgozman@chromium.org> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45625}
2017-05-31 11:40:31 +00:00
Smi [56],
[generators] Remove generator_object_ member from Suspend AST node Now that the BytecodeGenerator has a dedicated register holding the generator object, BytecodeGenerator::VisitSuspend can access the generator directly from that register. This reduces by one the number of live registers at each suspend point. Bug: v8:6351, v8:6460 Change-Id: I380a9d2bd8ca7eec6720e5392c1ca07dd0df0e2d Reviewed-on: https://chromium-review.googlesource.com/522982 Commit-Queue: Adam Klein <adamk@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/master@{#45710}
2017-06-05 17:41:26 +00:00
Smi [55],
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
Smi [15],
[ignition] Use jump table for generator resume mode Bug: v8:6351 Change-Id: Iad82fcfb4172d7a9cbadffa1e40fd1cd26866895 Reviewed-on: https://chromium-review.googlesource.com/521107 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45705}
2017-06-05 13:23:20 +00:00
Smi [7],
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
FIXED_ARRAY_TYPE,
[ignition] Use jump table for "finally" deferred commands Bug: v8:6218 Change-Id: I5d245ea485c93fcc03fcd95c82ae0474f31ffa5e Reviewed-on: https://chromium-review.googlesource.com/505491 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#45341}
2017-05-16 11:36:04 +00:00
Smi [6],
Smi [9],
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
]
handlers: [
Move generator-close on exception from the generator function to the GeneratorResume builtin. The change also moves creation of the iterator result from the parser to the bytecode generator. Unfortunately, async generators will stay on the old scheme (try-finally around generator body) because I am not exactly sure how they work. Review-Url: https://codereview.chromium.org/2917263002 Cr-Commit-Position: refs/heads/master@{#45713}
2017-06-05 19:54:14 +00:00
[62, 311, 317],
[65, 266, 268],
[parser] avoid complex for-loop desugaring when possible let/const declarations in "standard" C-style for-loops have some complex desugaring to accommodate the case where loop loop variables may be captured. This slows down the baseline performance of for-loops with let variables. This change attempts to avoid this desugaring if it's known that the loop variable is not captured at any point. A side effect of this change is that let/const loop variables, when not captured within the loop body, are not necessarily shown in the debugger, similar to other stack-allocated vars. BUG=v8:4762, v8:5460 R=marja@chromium.org, adamk@chromium.org, yangguo@chromium.org Change-Id: I8dbe545a12c086f675972bdba60c94998268311a Reviewed-on: https://chromium-review.googlesource.com/472247 Commit-Queue: Caitlin Potter <caitp@igalia.com> Reviewed-by: Yang Guo <yangguo@chromium.org> Reviewed-by: Adam Klein <adamk@chromium.org> Reviewed-by: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#44731}
2017-04-18 14:56:06 +00:00
]
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