cebfde6769
The function-entry stack check should dominate all other
instructions in a function. Prior to this CL it was possible to create
paths not including a stack check due to SwitchOnGeneratorState: the
generator-creation branch had a stack check, while generator-resume
branches did not.
0 : af fb 00 01 SwitchOnGeneratorState r0, [0], [1] { 0: @22 }
4 : 27 fe fa Mov <closure>, r1
7 : 27 02 f9 Mov <this>, r2
10 : 64 0a fa 02 InvokeIntrinsic [_CreateJSGeneratorObject], r1-r2
14 : 26 fb Star r0
16 : a7 StackCheck
17 : b0 fb fb 01 00 SuspendGenerator r0, r0-r0, [0]
22 : b1 fb fb 01 ResumeGenerator r0, r0-r0
[... no stack check here ...]
This CL moves the stack check to the beginning of the bytecode array,
i.e. before SwitchOnGeneratorState.
Bug: chromium:1020031
Change-Id: I8ba8cba99611ddbe50c76023129d926cc84b1d5e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1903440
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64888}
223 lines
5.1 KiB
Plaintext
223 lines
5.1 KiB
Plaintext
#
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# Autogenerated by generate-bytecode-expectations.
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#
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---
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wrap: yes
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---
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snippet: "
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var a = 1;
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var b = 2;
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return `${a}${b}string`;
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"
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frame size: 3
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parameter count: 1
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bytecode array length: 28
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(1),
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B(Star), R(0),
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/* 53 S> */ B(LdaSmi), I8(2),
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B(Star), R(1),
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/* 56 S> */ B(Ldar), R(0),
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B(ToString),
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B(Star), R(2),
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B(Ldar), R(1),
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/* 70 E> */ B(ToString),
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B(Add), R(2), U8(0),
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B(Star), R(2),
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B(LdaConstant), U8(0),
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B(Add), R(2), U8(0),
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/* 80 S> */ B(Return),
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]
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constant pool: [
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["string"],
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]
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handlers: [
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]
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---
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snippet: "
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var a = 1;
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var b = 2;
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return `string${a}${b}`;
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"
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frame size: 3
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parameter count: 1
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bytecode array length: 28
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(1),
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B(Star), R(0),
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/* 53 S> */ B(LdaSmi), I8(2),
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B(Star), R(1),
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/* 56 S> */ B(LdaConstant), U8(0),
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B(Star), R(2),
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B(Ldar), R(0),
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/* 72 E> */ B(ToString),
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B(Add), R(2), U8(0),
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B(Star), R(2),
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B(Ldar), R(1),
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/* 76 E> */ B(ToString),
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B(Add), R(2), U8(0),
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/* 80 S> */ B(Return),
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]
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constant pool: [
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["string"],
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]
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handlers: [
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]
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---
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snippet: "
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var a = 1;
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var b = 2;
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return `${a}string${b}`;
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"
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frame size: 3
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parameter count: 1
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bytecode array length: 28
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(1),
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B(Star), R(0),
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/* 53 S> */ B(LdaSmi), I8(2),
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B(Star), R(1),
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/* 56 S> */ B(Ldar), R(0),
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B(ToString),
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B(Star), R(2),
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B(LdaConstant), U8(0),
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B(Add), R(2), U8(0),
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B(Star), R(2),
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B(Ldar), R(1),
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/* 76 E> */ B(ToString),
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B(Add), R(2), U8(0),
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/* 80 S> */ B(Return),
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]
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constant pool: [
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["string"],
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]
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handlers: [
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]
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---
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snippet: "
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var a = 1;
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var b = 2;
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return `foo${a}bar${b}baz${1}`;
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"
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frame size: 3
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parameter count: 1
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bytecode array length: 50
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(1),
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B(Star), R(0),
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/* 53 S> */ B(LdaSmi), I8(2),
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B(Star), R(1),
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/* 56 S> */ B(LdaConstant), U8(0),
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B(Star), R(2),
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B(Ldar), R(0),
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/* 69 E> */ B(ToString),
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B(Add), R(2), U8(0),
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B(Star), R(2),
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B(LdaConstant), U8(1),
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B(Add), R(2), U8(0),
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B(Star), R(2),
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B(Ldar), R(1),
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/* 76 E> */ B(ToString),
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B(Add), R(2), U8(0),
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B(Star), R(2),
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B(LdaConstant), U8(2),
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B(Add), R(2), U8(0),
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B(Star), R(2),
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B(LdaSmi), I8(1),
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B(ToString),
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B(Add), R(2), U8(0),
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/* 87 S> */ B(Return),
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]
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constant pool: [
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["foo"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["bar"],
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["baz"],
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]
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handlers: [
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]
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---
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snippet: "
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var a = 1;
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var b = 2;
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return `${a}string` + `string${b}`;
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"
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frame size: 4
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parameter count: 1
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bytecode array length: 35
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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/* 42 S> */ B(LdaSmi), I8(1),
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B(Star), R(0),
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/* 53 S> */ B(LdaSmi), I8(2),
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B(Star), R(1),
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/* 56 S> */ B(Ldar), R(0),
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B(ToString),
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B(Star), R(2),
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B(LdaConstant), U8(0),
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B(Add), R(2), U8(1),
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B(Star), R(2),
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B(LdaConstant), U8(0),
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B(Star), R(3),
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B(Ldar), R(1),
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/* 87 E> */ B(ToString),
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B(Add), R(3), U8(2),
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/* 76 E> */ B(Add), R(2), U8(0),
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/* 91 S> */ B(Return),
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]
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constant pool: [
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["string"],
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]
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handlers: [
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]
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---
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snippet: "
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var a = 1;
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var b = 2;
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function foo(a, b) { };
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return `string${foo(a, b)}${a}${b}`;
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"
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frame size: 4
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parameter count: 1
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bytecode array length: 45
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bytecodes: [
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/* 30 E> */ B(StackCheck),
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B(CreateClosure), U8(0), U8(0), U8(2),
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B(Star), R(2),
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/* 42 S> */ B(LdaSmi), I8(1),
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B(Star), R(0),
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/* 53 S> */ B(LdaSmi), I8(2),
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B(Star), R(1),
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/* 80 S> */ B(LdaConstant), U8(1),
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B(Star), R(3),
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/* 96 E> */ B(CallUndefinedReceiver2), R(2), R(0), R(1), U8(1),
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B(ToString),
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B(Add), R(3), U8(0),
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B(Star), R(3),
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B(Ldar), R(0),
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/* 108 E> */ B(ToString),
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B(Add), R(3), U8(0),
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B(Star), R(3),
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B(Ldar), R(1),
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/* 112 E> */ B(ToString),
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B(Add), R(3), U8(0),
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/* 116 S> */ B(Return),
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]
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constant pool: [
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SHARED_FUNCTION_INFO_TYPE,
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ONE_BYTE_INTERNALIZED_STRING_TYPE ["string"],
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]
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handlers: [
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]
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