Reason for revert:
[Sheriff] Leads to crashes on all webrtc chromium testers, e.g.:
https://build.chromium.org/p/chromium.webrtc/builders/Mac%20Tester/builds/49664
Original issue's description:
> [heap] Parallel newspace evacuation, semispace copy, and compaction \o/
>
> All parallelism can be turned off using --predictable, or --noparallel-compaction.
>
> This patch completely parallelizes
> - semispace copy: from space -> to space (within newspace)
> - newspace evacuation: newspace -> oldspace
> - oldspace compaction: oldspace -> oldspace
>
> Previously newspace has been handled sequentially (semispace copy, newspace
> evacuation) before compacting oldspace in parallel. However, on a high level
> there are no dependencies between those two actions, hence we parallelize them
> altogether. We base the number of evacuation tasks on the overall set of
> to-be-processed pages (newspace + oldspace compaction pages).
>
> Some low-level details:
> - The hard cap on number of tasks has been lifted
> - We cache store buffer entries locally before merging them back into the global
> StoreBuffer in a finalization phase.
> - We cache AllocationSite operations locally before merging them back into the
> global pretenuring storage in a finalization phase.
> - AllocationSite might be compacted while they would be needed for newspace
> evacuation. To mitigate any problems we defer checking allocation sites for
> newspace till merging locally buffered data.
>
> CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_asan_rel,v8_linux64_tsan_rel,v8_mac64_asan_rel
> BUG=chromium:524425
> LOG=N
> R=hpayer@chromium.org, ulan@chromium.org
>
> Committed: https://crrev.com/8f0fd8c0370ae8c5aab56491b879d7e30c329062
> Cr-Commit-Position: refs/heads/master@{#33523}
TBR=hpayer@chromium.org,ulan@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:524425
Review URL: https://codereview.chromium.org/1643473002
Cr-Commit-Position: refs/heads/master@{#33539}
In a generator function, the parser rewrites a return statement into a "final"
yield. A final yield used to close the generator, which was incorrect because
the return may occur inside a try-finally clause and so the generator may not
yet terminate.
BUG=
Review URL: https://codereview.chromium.org/1634553002
Cr-Commit-Position: refs/heads/master@{#33537}
This patch stages the first part of RegExp subclassing--defining
Symbol.{match,replace,search,split}, but keeping their original
definitions which are restricted to a RegExp receiver and do not
call out to the core 'exec' method. This is being staged separately
because the two sets of extension points are separate features with
separate functionality. The amount of behavior which is held behind
the flag is very small, just exposing the symbols as properties of
Symbol--the behavior that the String methods call out to these Symbol
properties has already been shipping unflagged.
R=yangguo@chromium.org
BUG=v8:4305,v8:4343,v8:4344,v8:4345
LOG=Y
Review URL: https://codereview.chromium.org/1637703003
Cr-Commit-Position: refs/heads/master@{#33534}
Functions like DataView.prototype.getUint8 should have length 1,
and DataView.prototype.setUint8 should have length 2, as their
endianness arguments are optional. Additionally,
TypedArray.prototype.set.length should be 2. This follows the ES2015
specification, and a new test262 test tests for it. This patch
fixes the functions' lengths.
R=adamk
Review URL: https://codereview.chromium.org/1636953003
Cr-Commit-Position: refs/heads/master@{#33531}
ParseArrowFunctionLiteral was erroneously checking AllowsLazyCompilation
rather than AllowsLazyParsing when deciding whether to parse lazily.
This meant that lexically-scoped variables that had no other referents
wouldn't get closed over properly.
BUG=chromium:580934, v8:4255
LOG=y
Review URL: https://codereview.chromium.org/1630823006
Cr-Commit-Position: refs/heads/master@{#33530}
This makes it easier to see what behavior each test is verifying.
BUG=v8:3699
LOG=n
Review URL: https://codereview.chromium.org/1638853003
Cr-Commit-Position: refs/heads/master@{#33529}
They were already treated as a BindingPattern error; this patch simply
replaces that call with one marking them as both a binding and assignment
error, and adds parsing tests for both cases.
BUG=v8:4707
LOG=n
Review URL: https://codereview.chromium.org/1632303002
Cr-Commit-Position: refs/heads/master@{#33528}
It allows embedder to inject a stack sample on demand.
BUG=chromium:579191
LOG=N
Review URL: https://codereview.chromium.org/1631043002
Cr-Commit-Position: refs/heads/master@{#33527}
All parallelism can be turned off using --predictable, or --noparallel-compaction.
This patch completely parallelizes
- semispace copy: from space -> to space (within newspace)
- newspace evacuation: newspace -> oldspace
- oldspace compaction: oldspace -> oldspace
Previously newspace has been handled sequentially (semispace copy, newspace
evacuation) before compacting oldspace in parallel. However, on a high level
there are no dependencies between those two actions, hence we parallelize them
altogether. We base the number of evacuation tasks on the overall set of
to-be-processed pages (newspace + oldspace compaction pages).
Some low-level details:
- The hard cap on number of tasks has been lifted
- We cache store buffer entries locally before merging them back into the global
StoreBuffer in a finalization phase.
- We cache AllocationSite operations locally before merging them back into the
global pretenuring storage in a finalization phase.
- AllocationSite might be compacted while they would be needed for newspace
evacuation. To mitigate any problems we defer checking allocation sites for
newspace till merging locally buffered data.
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_asan_rel,v8_linux64_tsan_rel,v8_mac64_asan_rel
BUG=chromium:524425
LOG=N
R=hpayer@chromium.org, ulan@chromium.org
Review URL: https://codereview.chromium.org/1577853007
Cr-Commit-Position: refs/heads/master@{#33523}
A statement could have several break positions. The entire statement
should be considered muted if break points across all these break
positions evaluate to false.
R=verwaest@chromium.org
BUG=chromium:429167
LOG=N
Review URL: https://codereview.chromium.org/1615903002
Cr-Commit-Position: refs/heads/master@{#33522}
This replace HeapType with a dedicated class that implements just what we need for field type tracking. In the next CL, I plan to remove FieldType::Iterator because FieldType can iterate over at most one map.
The ultimate plan is to get rid of templates in types.(h|cc) and remove type-inl.h.
TBR=rossberg@chromium.org
Review URL: https://codereview.chromium.org/1636013002
Cr-Commit-Position: refs/heads/master@{#33521}
Reason for revert:
FAilure on win32 bot, need to investigate webkit failures.
Original issue's description:
> Type Feedback Vector lives in the closure
>
> We get less "pollution" of type feedback if we have one vector per native
> context, rather than one for the whole system. This CL moves the vector
> appropriately.
>
> We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
> vector actually lives in the first slot of the literals array (indeed there is
> great commonality between those arrays, they can be thought of as the same
> thing). So we make greater effort to ensure there is a valid literals array
> after compilation.
>
> This meant, for performance reasons, that we needed to extend
> FastNewClosureStub to support creating closures with literals. And ultimately,
> it drove us to move the optimized code map lookup out of FastNewClosureStub
> and into the compile lazy builtin.
>
> The heap change is trivial so I TBR Hannes for it...
>
> TBR=hpayer@chromium.org
>
> BUG=
>
> Committed: https://crrev.com/a5200f7ed4d11c6b882fa667da7a1864226544b4
> Cr-Commit-Position: refs/heads/master@{#33518}
TBR=bmeurer@chromium.org,akos.palfi@imgtec.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1632993003
Cr-Commit-Position: refs/heads/master@{#33520}
We get less "pollution" of type feedback if we have one vector per native
context, rather than one for the whole system. This CL moves the vector
appropriately.
We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
vector actually lives in the first slot of the literals array (indeed there is
great commonality between those arrays, they can be thought of as the same
thing). So we make greater effort to ensure there is a valid literals array
after compilation.
This meant, for performance reasons, that we needed to extend
FastNewClosureStub to support creating closures with literals. And ultimately,
it drove us to move the optimized code map lookup out of FastNewClosureStub
and into the compile lazy builtin.
The heap change is trivial so I TBR Hannes for it...
TBR=hpayer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1563213002
Cr-Commit-Position: refs/heads/master@{#33518}
This increases the size of register operands to be 16-bit.
Not all bytecodes have wide register variants, so when they are
needed a register translator will copy them into a small area
reserved at the top of the 8-bit register range and these registers
are supplied as arguments to the bytecode with 8-bit operands.
This is non-intrusive for typical bytecode where the number of
registers is less than 120. For bytecodes with wide register
operands (above the window) their index needs to be translated
to avoid the reserved translation window.
Enables splay.js to run in Octane and a handful of mjsunit tests.
BUG=v8:4280,v8:4675
LOG=NO
Review URL: https://codereview.chromium.org/1613163002
Cr-Commit-Position: refs/heads/master@{#33516}
- Remove semispace target capacity: It's unused and adds some unneeded
complexity
- Enforcing decl order for SemiSpace
- Move forward declarations in spaces.h to top
- Add all members to default constructor
BUG=chromium:581076
LOG=N
Review URL: https://codereview.chromium.org/1631713002
Cr-Commit-Position: refs/heads/master@{#33515}
This fixes the translation of 'throw' bytecodes to TurboFan graphs. The
correct runtime function is being used now, also the frame states are
attached to the correct nodes now.
R=mythria@chromium.org
TEST=cctest/test-run-jsexceptions/ThrowMessageIndirectly
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1636033002
Cr-Commit-Position: refs/heads/master@{#33513}
Rename IntepreterExceptionEntryHandler builtin to InterpreterEnterBytecodeDispatch
and use it as the return address when building interpreter frames during deopt.
This ensures that we restart execution of the outer frame at the correct
bytecode.
BUG=v8:4280,v8:4678
LOG=N
Review URL: https://codereview.chromium.org/1633633002
Cr-Commit-Position: refs/heads/master@{#33512}
Adds support for calling native function literals. Moves the logic for building
the native function's SharedFunctionInfo out of full-codegen into compiler.cc
to allow it to be shared between fullcodegen and Ignition.
BUG=v8:4686
LOG=N
Review URL: https://codereview.chromium.org/1635553002
Cr-Commit-Position: refs/heads/master@{#33510}
This CL implements PrepareForTailCall() mentioned in ES6 spec for full codegen, Crankshaft and Turbofan.
When debugger is active tail calls are disabled.
Tail calling can be enabled by --harmony-tailcalls flag.
BUG=v8:4698
LOG=Y
TBR=rossberg@chromium.org
Review URL: https://codereview.chromium.org/1609893003
Cr-Commit-Position: refs/heads/master@{#33509}
SpiderMonkey switched to 2, test262 tests for 2, and 2 is a reasonable, natural
value.
R=yangguo
Review URL: https://codereview.chromium.org/1616233002
Cr-Commit-Position: refs/heads/master@{#33504}
This patch makes Array.prototype.concat support subclassing Arrays
and constructing instances properly with Symbol.species. It is
guarded by the --harmony-species flag.
R=cbruni
LOG=Y
BUG=v8:4093
Review URL: https://codereview.chromium.org/1577043002
Cr-Commit-Position: refs/heads/master@{#33503}
This patch is a workaround to the performance regression caused by
implementing the ES2015 TypedArray prototype chain: Include a
per-TypedArray-subclass length getter so that the superclass getter does
not become polymorphic. The patch appears to fix a regression in the
Gameboy Octane benchmark.
BUG=chromium:579905
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1624383003
Cr-Commit-Position: refs/heads/master@{#33501}
* Add caching to handling of dangling loads
* Add two unittests for load elimination on escaped objects
BUG=v8:4586
LOG=n
Review URL: https://codereview.chromium.org/1619103004
Cr-Commit-Position: refs/heads/master@{#33498}
This fixes corner cases where the start offsets of exception handler
regions within the handler table fall together. This assumption was
based on full-codegen code and no longer holds with the interpreter.
The tables however are still well nested and code has been added to
verify that in debug mode.
R=rmcilroy@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1633573002
Cr-Commit-Position: refs/heads/master@{#33495}
The current support for try-catch in the interpreter can handle most of
the cases appearing in our test suite. Also the flag in question did not
detect try-finally constructs. This removes the flag and instead extends
the test expectations.
R=rmcilroy@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1631593003
Cr-Commit-Position: refs/heads/master@{#33494}
If it's Smi::FromInt(0), the NULL check would trigger. Instead, use the
handle-zap value to mean "not set".
BUG=v8:3647,chromium:580651
R=vogelheim@chromium.org
LOG=y
Review URL: https://codereview.chromium.org/1628173002
Cr-Commit-Position: refs/heads/master@{#33492}
- Completely rely on the concurrent sweeping state for SweepingCompleted()
- Rename the state accordingly.
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_asan_rel,v8_linux64_tsan_rel,v8_mac64_asan_rel
R=hpayer@chromium.org
Review URL: https://codereview.chromium.org/1614953002
Cr-Commit-Position: refs/heads/master@{#33490}
Cleanup %ForInPrepare runtime entry, and unify common logic with
%ForInEnumerate (renamed from %GetPropertyNamesFast). Also introduce
a TupleType to properly type JSForInPrepare and its projections w/o
special hacks in the Typer. And fix %ForInNext and JSForInNext to be
consistent with fullcodegen again (after the proxy refactorings last
quarter).
R=jarin@chromium.org
BUG=v8:3650
LOG=n
Review URL: https://codereview.chromium.org/1631583002
Cr-Commit-Position: refs/heads/master@{#33487}
This CL implements loop assignment analysis, a pass over a loop's body
to record local variables that are assigned. This pre-pass is similar
to that done on the JavaScript AST for the same reason: avoid introducing
too many phis at loop headers when building a graph.
R=bradnelson@chromium.org,ahaas@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1617723003
Cr-Commit-Position: refs/heads/master@{#33486}
A recent ES2015 semantics web compatibility fix changed a WebKit
test from a syntax error to a known failure without a syntax
error. This confused the fuzzer infrastructure. This patch updates
the test expectations to the expected output, based on what the
new semantics provide.
R=machenbach,adamk
BUG=v8:4693
LOG=N
Review URL: https://codereview.chromium.org/1628013003
Cr-Commit-Position: refs/heads/master@{#33484}
moves, we move those to the node, and remove them from the
predecessors ("merge" them to the common node).
If only some of the moves are common, we don't do anything. This is
what this change addresses.
The bug linked below should be addressed by this change. The only
difference in codegen before/after the change that introduced the bug
was un-merged moves.
BUG=chromium:549262
LOG=N
Review URL: https://codereview.chromium.org/1527203002
Cr-Commit-Position: refs/heads/master@{#33481}
The web appears to depend on being able to redeclare functions-in-blocks
in sloppy mode (examples seen so far tend to redeclare identical functions,
most likely accidentally).
This patch opens a minimal hole: two same-named function declarations
in the same scope are allowed, only in sloppy mode.
BUG=v8:4693, chromium:579395
LOG=y
Review URL: https://codereview.chromium.org/1622723003
Cr-Commit-Position: refs/heads/master@{#33478}
Change the interpreter to always store the current context in the frame's
context slot instead of the function context. This makes it possible to
restore the correct context during deopt.
BUG=v8:4678,v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1604923002
Cr-Commit-Position: refs/heads/master@{#33477}
These tests have been disabled while support for try-finally was work in
progress. By now control flow is connected properly and the tests pass.
R=oth@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1626503002
Cr-Commit-Position: refs/heads/master@{#33474}
This adds an explicit ReThrow bytecode to be used in the modelling of
try-finally statements. An exception that is being re-thrown should not
trigger message object creation or location computation and hence cannot
use the existing Throw bytecode.
R=rmcilroy@chromium.org
TEST=cctest/test-interpreter/InterpreterTryFinally
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1621673002
Cr-Commit-Position: refs/heads/master@{#33472}
In case the receiver map has an enum cache, %ForInPrepare returns the
length of the actual enum cache, which might include properties that
are further down the transition tree tho.
R=jarin@chromium.org
BUG=v8:3650
LOG=n
Review URL: https://codereview.chromium.org/1619353002
Cr-Commit-Position: refs/heads/master@{#33469}
