We are enabling this trial on canary to see if we can flush out some missing
context restores.
BUG=
Review-Url: https://codereview.chromium.org/2164633002
Cr-Commit-Position: refs/heads/master@{#37875}
Copies the behaviour of FullCode in attempting to get the state for
ForInPrepare inline and falling back to the runtime if necessary.
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/2155153002
Cr-Commit-Position: refs/heads/master@{#37874}
This adds an additional column with percentages to the output of
bytecode_dispatch_report.py --top-dispatches-for-bytecode.
The percentages always represent the relative number of dispatches to
the target bytecode to all dispatches from the source bytecode.
The additional flag --sort-sources-relative/-r allows sorting the
"Top sources of dispatches to" the given bytecode by this column to more
easily find bytecodes that significantly often dispatch to the target.
BUG=v8:4899
LOG=N
Review-Url: https://codereview.chromium.org/2159683003
Cr-Commit-Position: refs/heads/master@{#37873}
Reason for revert:
This cl causes a large regression in octane (https://chromeperf.appspot.com/group_report?bug_id=629503). I have to investigate the reason before I can reland this.
Original issue's description:
> [Interpreter] Collect type feedback for 'new' in the bytecode handler
>
> Collect type feedback in the bytecode handler for 'new' bytecode. The
> current implementation does not collect allocation site feedback.
>
> BUG=v8:4280, v8:4780
> LOG=N
>
> Committed: https://crrev.com/1eadc76419b323fb2e55ae9953142f801704aa59
> Cr-Commit-Position: refs/heads/master@{#37862}
TBR=rmcilroy@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280, v8:4780
Review-Url: https://codereview.chromium.org/2165633003
Cr-Commit-Position: refs/heads/master@{#37872}
This ports a large portion of Error methods to C++,
including the constructor, stack setter and getter,
and Error.prototype.toString.
BUG=
Review-Url: https://codereview.chromium.org/2142933003
Cr-Commit-Position: refs/heads/master@{#37870}
Instead of wriring the elements kind transitions into the control flow
early on, we do instead put this marker into the effect chain, so that
the elements transitions are visible to the LoadElimination and can
thus be optimized properly there.
This CL itself doesn't add any of those optimizations, but just adds
the foundations to make them possible later.
R=jarin@chromium.org
BUG=v8:4930,v8:5141
Review-Url: https://codereview.chromium.org/2164573003
Cr-Commit-Position: refs/heads/master@{#37869}
This probably slightly speeds up AllocateParameterLocals, but more importantly it removes ast_value_factory_ uses. If we get rid of ast_value_factory from Scope it's easier to lazily allocate it later from within a ScopeState object.
BUG=v8:5209
Review-Url: https://codereview.chromium.org/2158333002
Cr-Commit-Position: refs/heads/master@{#37868}
Original issue's description:
> [interpeter] Move to table based peephole optimizer.
>
> Introduces a lookup table for peephole optimizations.
>
> Fixes some tests using BytecodePeepholeOptimizer::Write() that should
> have been update to use BytecodePeepholeOptimizer::WriteJump().
>
> BUG=v8:4280
> LOG=N
>
> Committed: https://crrev.com/f4234422b93b21a286b0f31799009bcbe8b90b9e
> Cr-Commit-Position: refs/heads/master@{#37819}
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/2164583002
Cr-Commit-Position: refs/heads/master@{#37866}
This reduces memory usage when parsing (because temp_zones are discarded
every now and then) and work done by FuncNameInferrer.
BUG=
Review-Url: https://codereview.chromium.org/2156013002
Cr-Commit-Position: refs/heads/master@{#37863}
Collect type feedback in the bytecode handler for 'new' bytecode. The
current implementation does not collect allocation site feedback.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2153433002
Cr-Commit-Position: refs/heads/master@{#37862}
Port 8e18a5f2a0
Failing on r6 due to wrong registers used in macro assembler.
TEST=test-run-machops/RunInt32MulWithOverflowImm
BUG=
Review-Url: https://codereview.chromium.org/2165533002
Cr-Commit-Position: refs/heads/master@{#37861}
This will allow us to move more state from Scope into ScopeState and lazily allocate full Scopes only when needed.
BUG=v8:5209
Review-Url: https://codereview.chromium.org/2160593002
Cr-Commit-Position: refs/heads/master@{#37858}
For 64-bit cmp, replace the if clause with InputOperand2_64(), and apply the
same change to cmn.
BUG=
Review-Url: https://codereview.chromium.org/2160643002
Cr-Commit-Position: refs/heads/master@{#37855}
This allows to pass deoptimization reasons to the profiler without the
requirement of always providing a source position. The absence of deopt
reasons is now communicated via a sentinel as the deopt id value. The
deoptimization reasons recently added to TurboFan are now passed to the
profiler.
R=bmeurer@chromium.org
TEST=cctest/test-cpu-profiler
Review-Url: https://codereview.chromium.org/2159793002
Cr-Commit-Position: refs/heads/master@{#37852}
We need to pay attention to potential side effects from parameter
evaluation when inlining the fast case Array.prototype.shift.
R=yangguo@chromium.org
BUG=chromium:614644
Review-Url: https://codereview.chromium.org/2161943002
Cr-Commit-Position: refs/heads/master@{#37850}
Introduce a proper CodeStubAssembler::BranchIfToBooleanIsTrue helper
method, that branches to if_true/if_false labels depending on whether
the value that is passed would yield true or false when fed to
ToBoolean. Use this helper to implement the bytecode handlers w/o having
to materialize the temporary booleans and essentially branching twice.
The CodeStubAssembler::BranchIfToBooleanIsTrue helper favors the most
likely case of a Boolean constant now.
Also migrate the ToBooleanStub to a ToBoolean TurboFan builtin, that
also uses the helper method under the hood.
Remove the now obsolete Oddball::to_boolean field.
R=hpayer@chromium.org, rmcilroy@chromium.org, yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2151163002
Cr-Commit-Position: refs/heads/master@{#37849}
Rolling v8/base/trace_event/common to f8c51e1c3b08cd1c03986f098732b87ba98a3475
Rolling v8/build to 1303552bdbd1791ad26b62f7c7052cbbf0326574
TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org
Review-Url: https://codereview.chromium.org/2161933002
Cr-Commit-Position: refs/heads/master@{#37847}
In case of deoptimization after WordCompare test, the control flow is lost in the
unoptimized version of the code because wrong register is used for comparision
(a0 instead of v0)
TEST=mjsunit/regress/regress-3717
BUG=
Review-Url: https://codereview.chromium.org/2160533003
Cr-Commit-Position: refs/heads/master@{#37845}
Original issue's description:
> Don't compile functions in a context the caller doesn't have access to
>
> Instead just return undefined
>
> A side effect of this is that it's no longer possible to compile
> functions in a detached context.
>
> BUG=chromium:541703
> R=verwaest@chromium.org,bmeurer@chromium.org
BUG=chromium:541703
R=verwaest@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng
Review-Url: https://codereview.chromium.org/2155503004
Cr-Commit-Position: refs/heads/master@{#37842}
This is a first step towards reducing memory usage by scopes in the parser. Peak zone memory usage on octane-codeload goes down by ~10%
BUG=
Review-Url: https://codereview.chromium.org/2159573002
Cr-Commit-Position: refs/heads/master@{#37840}
Calling into JS from stack trace generation becomes an issue during
stack overflows: we'd detect a stack overflow, attempt to create an
exception, call into JS, detect a stack overflow, and repeat.
R=yangguo@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2147193002
Cr-Commit-Position: refs/heads/master@{#37837}
When reading through the source code (v8.h) I found some minor typos
which I wanted to report.
BUG=
Review-Url: https://codereview.chromium.org/2130513002
Cr-Commit-Position: refs/heads/master@{#37835}
The bug occurs because we do not canonicalize character class ranges
before adding case equivalents. While adding case equivalents, we abort
early for one-byte subject strings, assuming that the ranges are sorted.
Which they are not.
R=marja@chromium.org
BUG=v8:5199
Review-Url: https://codereview.chromium.org/2159683002
Cr-Commit-Position: refs/heads/master@{#37833}
This makes sure that we preserve call's tailness even if we have
introduced a loop exit between the call and the return.
BUG=chromium:628773
Review-Url: https://codereview.chromium.org/2155123002
Cr-Commit-Position: refs/heads/master@{#37832}
In int32 multiplication, if we have a positive integer as input, then we know we can't produce a -0 answer. The same is true if truncation is applied (x * y | 0). Without this information, we have to rather annoyingly check if the result of multiplication is 0, then OR the inputs to check for negativity, and possibly return -0. In TurboFan, we'll deopt in this case.
BUG=
Review-Url: https://codereview.chromium.org/2154073002
Cr-Commit-Position: refs/heads/master@{#37831}
