Align GetIterator with ES6 spec

BUG=None
LOG=N
R=adamk

Review URL: https://codereview.chromium.org/936793003

Cr-Commit-Position: refs/heads/master@{#26759}

Teach ModuleDescriptor about basic local exports

Add() becomes AddLocalExport, which takes an export_name and a local_name.
New parsing tests exercise this.

Also start generating exports for default exports (though this doesn't yet
handle anonymous default exports).

BUG=v8:1569
LOG=n

Review URL: https://codereview.chromium.org/934323004

Cr-Commit-Position: refs/heads/master@{#26758}

Put more information to the stack when crbug/454297 happens.

Review URL: https://codereview.chromium.org/941693002

Cr-Commit-Position: refs/heads/master@{#26757}

MIPS: Silence warnings and unbreak optdebug build for target.

This is a temporary workaround for bogus array-bounds warning, due to bug in MIPS toolchain versions 4.8.2 and 4.9.2.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56273

TEST=
BUG=

Review URL: https://codereview.chromium.org/928533002

Cr-Commit-Position: refs/heads/master@{#26756}

[strong] make function and class declarations lexical & immutable

R=arv@chromium.org
BUG=

Review URL: https://codereview.chromium.org/932283003

Cr-Commit-Position: refs/heads/master@{#26755}

Super store

When the property is not found on the [[HomeObject]] prototype chain
then we should do a [[DefineOwnProperty]] on the instance.

BUG=v8:3330
LOG=N

Review URL: https://codereview.chromium.org/934463003

Cr-Commit-Position: refs/heads/master@{#26754}

[strong] Deprecate arguments

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/932333004

Cr-Commit-Position: refs/heads/master@{#26753}

Minor tools/grokdump improvements: avoid some None dereferences and add some line breaks to generated html pages.

Review URL: https://codereview.chromium.org/943573002

Cr-Commit-Position: refs/heads/master@{#26752}

[strong] Deprecate for-in

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/939063002

Cr-Commit-Position: refs/heads/master@{#26751}

Keep cl trybots in sync with cq.

TBR=bmeurer@chromium.org
BUG=chromium:353487
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/930203003

Cr-Commit-Position: refs/heads/master@{#26750}

Reflect debug mode build in flags hash.

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/940003002

Cr-Commit-Position: refs/heads/master@{#26749}

Embed store callback in handler via weak cell.

BUG=chromium:454619
LOG=NO

Review URL: https://codereview.chromium.org/926293004

Cr-Commit-Position: refs/heads/master@{#26748}

Clear Map::constructor to object_function from the same context for prototype maps. This avoids keeping small pockets of memory alive for the common pattern where prototypes are used to emulate classes:

function inherit(parent, child) {
  function p() {}
  p.prototype = parent.prototype;
  child.prototype = new p();
}

Otherwise child.prototype[constructor] keeps alive p, p's context, the
initial map attached to p, and the (now empty) transition array of the
initial map.

BUG=

Review URL: https://codereview.chromium.org/942493002

Cr-Commit-Position: refs/heads/master@{#26747}

[turbofan] Transfer types from loop phis to OSR values.

R=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/930003003

Cr-Commit-Position: refs/heads/master@{#26746}

[turbofan] Simplify context specialization and fix for OSR.

AstGraphBuilder puts a constant context in from the beginning.
Also fix bug in merging contexts in environment.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/934293002

Cr-Commit-Position: refs/heads/master@{#26745}

Make generator constructors configurable

R=mstarzinger@chromium.org
BUG=v8:3902
LOG=Y

Review URL: https://codereview.chromium.org/939953002

Cr-Commit-Position: refs/heads/master@{#26744}

[turbofan] Fix typing of comparisons.

BUG=chromium:459955
LOG=n
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/943483002

Cr-Commit-Position: refs/heads/master@{#26743}

Revert of [x64] Generate test reg,reg instead of cmp reg,0. (patchset #2 id:20001 of https://codereview.chromium.org/916543004/)

Reason for revert:
Tanks some benchmarks (for no obvious reason)

Original issue's description:
> [x64] Generate test reg,reg instead of cmp reg,0.
>
> The instruction sequence is shorter and saves decoding bandwidth.
>
> R=svenpanne@chromium.org
>
> Committed: https://crrev.com/a7fb5ed400701b22c455d0ad410bc98b211e5730
> Cr-Commit-Position: refs/heads/master@{#26734}

TBR=svenpanne@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/939923003

Cr-Commit-Position: refs/heads/master@{#26742}

A few tests fails when I run them with --hydrogen-track-positions

The root of problem is the fact that we don't track the position of 'this' statement but use them when visit compare statement.
As a result we have -1 as the position of left expression and the resulting relative position is negative and doesn't fit into BitField.

BUG=452067
TEST=test-cpu-profiler/SourceLocation
LOG=n

Review URL: https://codereview.chromium.org/940593002

Cr-Commit-Position: refs/heads/master@{#26741}

Revert "Remove IC age from Code."

This reverts commit 3cd889 for regressing Kraken benchmark

BUG=chromium:457174
LOG=N

Review URL: https://codereview.chromium.org/941503003

Cr-Commit-Position: refs/heads/master@{#26740}

[x64] Improve instruction selection for TruncateInt64ToInt32.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/936323004

Cr-Commit-Position: refs/heads/master@{#26739}

Unlink pages from the space page list after evacuation.

BUG=430201
LOG=n

Review URL: https://codereview.chromium.org/937833002

Cr-Commit-Position: refs/heads/master@{#26738}

Revert of Remove handle wrappers from basic elements accessors (patchset #2 id:20001 of https://codereview.chromium.org/934173004/)

Reason for revert:
Breakage

Original issue's description:
> Remove handle wrappers from basic elements accessors
>
> BUG=
> R=yangguo@chromium.org
>
> Committed: https://crrev.com/40b7c513c696f405af0ae3e74e844d3c341bc3f2
> Cr-Commit-Position: refs/heads/master@{#26736}

TBR=yangguo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/932693003

Cr-Commit-Position: refs/heads/master@{#26737}

Remove handle wrappers from basic elements accessors

BUG=
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/934173004

Cr-Commit-Position: refs/heads/master@{#26736}

Remove receiver as parameter to Get/Has Element in the accessors.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/939933002

Cr-Commit-Position: refs/heads/master@{#26735}

[x64] Generate test reg,reg instead of cmp reg,0.

The instruction sequence is shorter and saves decoding bandwidth.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/916543004

Cr-Commit-Position: refs/heads/master@{#26734}

Cleanup: Remove DCHECK_RESULT macro.

BUG=None
R=bmeurer@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/933673002

Cr-Commit-Position: refs/heads/master@{#26733}

Update V8 DEPS.

Rolling v8/build/gyp to 34640080d08ab2a37665512e52142947def3056d

Rolling v8/tools/clang to f6daa55d03995e82201a3278203e7c0421a59546

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/937063002

Cr-Commit-Position: refs/heads/master@{#26732}

Fixed incorrect generalization of types in Map::ReconfigureProperty() introduced in r26667.

BUG=chromium:459512
LOG=N
TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/936253002

Cr-Commit-Position: refs/heads/master@{#26731}

Keep cl trybots in sync with cq.

NOTRY=true

Review URL: https://codereview.chromium.org/929793005

Cr-Commit-Position: refs/heads/master@{#26730}

MIPS: Fix 'MIPS: [turbofan] Optimize certain chains of Branch into a Switch.'

Space and time constants fixed. Delay slot optimisations added.

BUG=

Review URL: https://codereview.chromium.org/940453003

Cr-Commit-Position: refs/heads/master@{#26729}

Rename Interface to ModuleDescriptor

ModuleDescriptor will end up holding the set of data described in the
spec as a "Module record". This introduces a little bit of confusion
with ModuleInfo, but I hope that'll become clearer over time.

Also removed the interface-printing flags. We probably want
Module-printing flags, but that can wait until we have more
Module-related structures.

BUG=v8:1569
LOG=n

Review URL: https://codereview.chromium.org/935723004

Cr-Commit-Position: refs/heads/master@{#26728}

Temporarily disable double fields unboxing.

Review URL: https://codereview.chromium.org/928733003

Cr-Commit-Position: refs/heads/master@{#26727}

[strong] Remove a regression test for "use before var".

This case should break in strong mode (unlike previously thought).

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/935093002

Cr-Commit-Position: refs/heads/master@{#26726}

The expected key is a valid identifier, which is already free of \\, <0x20, ".

BUG=

Review URL: https://codereview.chromium.org/936613006

Cr-Commit-Position: refs/heads/master@{#26725}

Make gcmole execute in parallel.

TBR=tandrii@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/931233002

Cr-Commit-Position: refs/heads/master@{#26724}

Make gcmole correctly handle 32 bit architectures.

NOTRY=true

Review URL: https://codereview.chromium.org/935843003

Cr-Commit-Position: refs/heads/master@{#26723}

[ARM64] removed unused variable.

BUG=

Review URL: https://codereview.chromium.org/939663002

Cr-Commit-Position: refs/heads/master@{#26722}

Fix for cctest/test-api/SetJitCodeEventHandler: generate less objects during execution to avoid unwanted GCs.

BUG=v8:3899
LOG=N

Review URL: https://codereview.chromium.org/934243003

Cr-Commit-Position: refs/heads/master@{#26721}

Introduce and test NodeProperties::CollectControlProjections.

R=bmeurer@chromium.org
TEST=unittests/NodePropertiesTest.CollectControlProjections

Review URL: https://codereview.chromium.org/935033004

Cr-Commit-Position: refs/heads/master@{#26720}

Fix sampling of V8.DetachedContextAgeInGC histogram.

BUG=

Review URL: https://codereview.chromium.org/938693002

Cr-Commit-Position: refs/heads/master@{#26719}

Move LookupResult into crankshaft as that's now the only place where it's still used
Additionally handlify the "transition" field so that GC can stop caring about it.

BUG=

Review URL: https://codereview.chromium.org/935033003

Cr-Commit-Position: refs/heads/master@{#26718}

Remove the holder_ field from LookupResult

BUG=

Review URL: https://codereview.chromium.org/932533003

Cr-Commit-Position: refs/heads/master@{#26717}

Fix JSObjectFieldAccessor support in crankshaft

BUG=459459
LOG=n

Review URL: https://codereview.chromium.org/940483002

Cr-Commit-Position: refs/heads/master@{#26716}

Always shrink initial old generation size based on survival rate.

BUG=

Review URL: https://codereview.chromium.org/936773002

Cr-Commit-Position: refs/heads/master@{#26715}

Simplify handling of stack overflows in AstGraphBuilder.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/935033002

Cr-Commit-Position: refs/heads/master@{#26714}

Adjust types in SourcePosition. int -> uint32_t

BUG=
LOG=n

Review URL: https://codereview.chromium.org/931163002

Cr-Commit-Position: refs/heads/master@{#26713}

[x64] Recognize zero extension of 8-bit and 16-bit values.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/938513003

Cr-Commit-Position: refs/heads/master@{#26712}

MIPS: Stop using HeapType in IC and Crankshaft

Port 119cb5661724006b736fcb6484258c752125e372

BUG=

Review URL: https://codereview.chromium.org/929443003

Cr-Commit-Position: refs/heads/master@{#26711}

[tests]: fix exponentiation in harmony array-concat tests

BUG=
LOG=N
R=adamk@chromium.org

Review URL: https://codereview.chromium.org/921683006

Cr-Commit-Position: refs/heads/master@{#26710}

Reship classes & object literal extensions

R=arv@chromium.org,marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/933813003

Cr-Commit-Position: refs/heads/master@{#26709}

Strip Interface class of most of its logic, make it all about Module exports

This gets Variable and VariableProxy out of the business of worrying about
Interfaces.

At the same time, get rid of the notion of "module variables". In ES6, variables
that refer to modules will be simply be CONST bindings to module namespace
objects.

The only change in logic here is one more early error:
duplicate export names are now rejected.

BUG=v8:1569
LOG=n

Review URL: https://codereview.chromium.org/918373002

Cr-Commit-Position: refs/heads/master@{#26708}

MIPS: [turbofan] Optimize certain chains of Branch into a Switch.

Port acd9c46ca7a0ada723d717f2545fd484c824eaa2

Original commit message:
This adds a new ControlFlowOptimizer that - for now - recognizes chains
of Branches generated by the SwitchBuilder for a subset of javascript
switches into Switch nodes. Those Switch nodes are then lowered to
either table or lookup switches.

Also rename Case to IfValue (and introduce IfDefault) for consistency.

BUG=v8:3872
LOG=n

Review URL: https://codereview.chromium.org/931263002

Cr-Commit-Position: refs/heads/master@{#26707}

Remove redundant helpers from JSGenericLowering.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/931233003

Cr-Commit-Position: refs/heads/master@{#26706}

[turbofan] Rename context stack as part of the environment for OSR.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/921083004

Cr-Commit-Position: refs/heads/master@{#26705}

Convert to immutable heap number when materializing arguments object.

BUG=chromium:457935
LOG=n
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/935623002

Cr-Commit-Position: refs/heads/master@{#26704}

Fix compilation in release mode.

R=ishell@chromium.org
TBR=ishell@chromium.org

Review URL: https://codereview.chromium.org/928373003

Cr-Commit-Position: refs/heads/master@{#26703}

Fix representation for CompareIC in JSGenericLowering.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-3884
BUG=v8:3884
LOG=N

Review URL: https://codereview.chromium.org/933913002

Cr-Commit-Position: refs/heads/master@{#26702}

[strong] deprecate empty sub-statements

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/931223002

Cr-Commit-Position: refs/heads/master@{#26701}

MIPS64: Assembler support for internal references.

Port 49cbe537e715c960fb9773af2e240133726f465b

BUG=

Review URL: https://codereview.chromium.org/930623003

Cr-Commit-Position: refs/heads/master@{#26700}

MIPS64: [turbofan] Initial support for Switch.

Port feb2890711e8072a9550abb89621929816fc9699

Original commit message:
Adds Switch and Case operators to TurboFan and handles them
appropriately in instruction selection and code generation.

BUG=

Review URL: https://codereview.chromium.org/932683002

Cr-Commit-Position: refs/heads/master@{#26699}

[strong] Deprecate delete

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/932833002

Cr-Commit-Position: refs/heads/master@{#26698}

[strong] Forbid var.

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/927953003

Cr-Commit-Position: refs/heads/master@{#26697}

Stop using HeapType in IC and Crankshaft

BUG=

Review URL: https://codereview.chromium.org/935603002

Cr-Commit-Position: refs/heads/master@{#26696}

During arguments materialization, do not store materialized objects without lazy deopt.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/919173003

Cr-Commit-Position: refs/heads/master@{#26695}

[strong] Remove mjsunit/strong/use-strong-flag.js

It would force us to make mjsunit.js strong-compatible, and that's too much for
now (for the upcoming features) and would have a ripple effect on other
tests. Especially debug-script.js which unships harmony features would break.

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/930293002

Cr-Commit-Position: refs/heads/master@{#26694}

MIPS: reland Fix 'Assembler support for internal references.'

Fix compilation problem with android toolchain.

Added new INTERNAL_REFERENCE_ENCODED RelocInfo type to differentiate MIPS existing use of internal references in instructions from the new raw pointer reference needed for dd(Label*).

BUG=
TEST=cctest/test-assembler-mips/jump_tables1, cctest/test-assembler-mips/jump_tables2, cctest/test-assembler-mips/jump_tables3, cctest/test-run-machops/RunSwitch1

Review URL: https://codereview.chromium.org/935593002

Cr-Commit-Position: refs/heads/master@{#26693}

Start with a more conservative initial old generation size.

BUG=

Review URL: https://codereview.chromium.org/934803002

Cr-Commit-Position: refs/heads/master@{#26692}

[turbofan] Optimize certain chains of Branch into a Switch.

This adds a new ControlFlowOptimizer that - for now - recognizes chains
of Branches generated by the SwitchBuilder for a subset of javascript
switches into Switch nodes. Those Switch nodes are then lowered to
either table or lookup switches.

Also rename Case to IfValue (and introduce IfDefault) for consistency.

BUG=v8:3872
LOG=n

Review URL: https://codereview.chromium.org/931623002

Cr-Commit-Position: refs/heads/master@{#26691}

Add historgram for number of GC needed to collect a detached context.

BUG=

Review URL: https://codereview.chromium.org/934773002

Cr-Commit-Position: refs/heads/master@{#26690}

CpuProfile: rename HSourcePosition to SourcePosition and move it to compiler.*

Fix CompilationInfo::TraceInlinedFunction argument.
Fix leaked CodeTracer in Isolate

BUG=452067
LOG=n

Review URL: https://codereview.chromium.org/928343003

Cr-Commit-Position: refs/heads/master@{#26689}

[turbofan] Fix simplified lowering of NumberToUint32.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/933873002

Cr-Commit-Position: refs/heads/master@{#26688}

[strong] make --use-strong flag work in d8

This broke with the TSAN fix.

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/933863002

Cr-Commit-Position: refs/heads/master@{#26687}

[turbofan] Fix control reducer for dead loops.

Note OSR special case.
Also improved robustness of OSR tests.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/920573004

Cr-Commit-Position: refs/heads/master@{#26686}

Correctly propagate terminate exception in TryCall.

BUG=v8:3892
LOG=Y

Review URL: https://codereview.chromium.org/928193002

Cr-Commit-Position: refs/heads/master@{#26685}

Fix branch test for merge script.

Failing calls to show-ref cause an exception in python.

BUG=chromium:451975
TBR=tandrii@chromium.org
NOTRY=true
LOG=n

TEST=./script_test.py

Review URL: https://codereview.chromium.org/933523003

Cr-Commit-Position: refs/heads/master@{#26684}

Put extra information to the stack when crbug/454297 happens.

Review URL: https://codereview.chromium.org/930243002

Cr-Commit-Position: refs/heads/master@{#26683}

[turbofan] Refactor JSInliner to be a Reducer.

Next step: fix copying of the graph in inlining.

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/934723002

Cr-Commit-Position: refs/heads/master@{#26682}

Implement most common usecase for elements kind generalization

BUG=

Review URL: https://codereview.chromium.org/931083002

Cr-Commit-Position: refs/heads/master@{#26681}

CpuProfiler: move InlinedFunctionInfo class from HGraphBuilder to CompilationInfo.

A function could be deoptimized due to a deopt in the inlined code.
The inlined function might be defined in another script. So we need to
track the information about the inlined functions (scriptId and offset).
We already have the tracking code which is behind FLAG_hydrogen_track_position.
So as the first step we need to make the info accessible by CPU profiler.
In the follow-up patches I'll add the code which will enable position
tracking and push the info into CodeEntry entries.

BUG=452067
LOG=n

Review URL: https://codereview.chromium.org/914413007

Cr-Commit-Position: refs/heads/master@{#26680}

Reduce field type tracking to a single stable map per field.

BUG=

Review URL: https://codereview.chromium.org/930983003

Cr-Commit-Position: refs/heads/master@{#26679}

CodeTracer should open file in binary mode to avoid line endings normalization.

Review URL: https://codereview.chromium.org/924943006

Cr-Commit-Position: refs/heads/master@{#26678}

Cleanup AstGraphBuilder::AddHomeObjectIfNeeded a bit.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/925363003

Cr-Commit-Position: refs/heads/master@{#26677}

Fix typo in merge script.

BUG=chromium:451975
TBR=tandrii@chromium.org
NOTRY=true
LOG=n

TEST=./script_test.py

Review URL: https://codereview.chromium.org/932703002

Cr-Commit-Position: refs/heads/master@{#26676}

Revert of MIPS: Fix 'Assembler support for internal references.' (patchset #1 id:1 of https://codereview.chromium.org/922043005/)

Reason for revert:
Breaks http://build.chromium.org/p/chromium.fyi/builders/Android%20MIPS%20Builder%20(dbg)

Original issue's description:
> MIPS: Fix 'Assembler support for internal references.'
>
> Added new INTERNAL_REFERENCE_ENCODED RelocInfo type to differentiate MIPS existing use of internal references in instructions from the new raw pointer reference needed for dd(Label*).
>
> BUG=
> TEST=cctest/test-assembler-mips/jump_tables1, cctest/test-assembler-mips/jump_tables2, cctest/test-assembler-mips/jump_tables3, cctest/test-run-machops/RunSwitch1
>
> Committed: https://crrev.com/244ac6de8316259bc5878480e05348a369c08e2f
> Cr-Commit-Position: refs/heads/master@{#26651}

TBR=danno@chromium.org,bmeurer@chromium.org,jkummerow@chromium.org,paul.lind@imgtec.com,gergely.kis@imgtec.com,akos.palfi@imgtec.com,dusan.milosavljevic@imgtec.com,balazs.kilvady@imgtec.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/934623003

Cr-Commit-Position: refs/heads/master@{#26675}

GCMole issues fixes (part 2).

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/927153002

Cr-Commit-Position: refs/heads/master@{#26674}

[parsing]: eval/arguments parameter names are ok in sloppy mode

BUG=v8:3891
LOG=N
R=arv@chromium.org, marja@chromium.org

Review URL: https://codereview.chromium.org/924403002

Cr-Commit-Position: refs/heads/master@{#26673}

Move DeadControl into the JSGraph so that it can be reused.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/929123002

Cr-Commit-Position: refs/heads/master@{#26672}

[strong] Adding regression cases which should always continue working.

1) Mutually recursive functions
2) Strong code using non-strong var before declaration.

These test cases ensure that we don't accidentally kill these wanted behaviors
when adding restrictions to strong mode.

BUG=

Review URL: https://codereview.chromium.org/927143002

Cr-Commit-Position: refs/heads/master@{#26671}

Fixed GCMole issues after r26667.

Review URL: https://codereview.chromium.org/927133002

Cr-Commit-Position: refs/heads/master@{#26670}

Fix v8rel script after adding roll branches.

Use git hashes as keys when referring to releases, not
pure commit position numbers as those are not unique.

Better bailout to only check for recent releases.

Add new branching method with a roll branch in heads to
the v8rel test case.

Fix the way v8 is referred to in DEPS files in the test
cases. The test still had svn-number style.

BUG=chromium:451975
TBR=tandrii@chromium.org
NOTRY=true
LOG=n

TEST=./script_test.py

Review URL: https://codereview.chromium.org/928243002

Cr-Commit-Position: refs/heads/master@{#26669}

Fix for the compilation failure due to multi-line comments in test-migrations.cc

TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/923943003

Cr-Commit-Position: refs/heads/master@{#26668}

Property reconfiguring implemented.

Previous approach for property reconfiguration was to create a free-floating map with generalized representations of all fields. This patch does it right.

When property is reconfigured either by changing its kind (kData <-> kAccessor) or its attributes it implies creation of a new branch in transition tree. If such a branch already existed before reconfiguration then it should be merged with the old (or source) branch of the transition tree. Merging procedure includes all the heavy machinery such as property location changes (kDescriptor -> kField), field representation/field type generalization, map deprecation, etc.

Review URL: https://codereview.chromium.org/888623002

Cr-Commit-Position: refs/heads/master@{#26667}

[turbofan] Fix control reducer with re-reducing branches.

R=jarin@chromium.org
LOG=Y
BUG=chromium:458876

Review URL: https://codereview.chromium.org/917383004

Cr-Commit-Position: refs/heads/master@{#26666}

[turbofan] Clear pending exception from unsuccessful compilation.

BUG=chromium:458987
LOG=n
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/932603002

Cr-Commit-Position: refs/heads/master@{#26665}

Build stack frames for stubs only when needed.

The heuristic is quite naive at the moment (build a frame iff the
register allocator needed spill slots), we can improve that later.

Review URL: https://codereview.chromium.org/933603002

Cr-Commit-Position: refs/heads/master@{#26664}

gcc 4.6 fix.

BUG=

Review URL: https://codereview.chromium.org/927083002

Cr-Commit-Position: refs/heads/master@{#26663}

Remove prototype key from the prototype transitions since its also embedded in the target map.

BUG=

Review URL: https://codereview.chromium.org/932583002

Cr-Commit-Position: refs/heads/master@{#26662}

[turbofan] Avoid ToNumber conversions if they could deoptimize.

BUG=chromium:454158
LOG=n
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/922623002

Cr-Commit-Position: refs/heads/master@{#26661}

Track code cache reject reason via histogram buckets.

R=vogelheim@chromium.org
BUG=chromium:441896
LOG=N

Review URL: https://codereview.chromium.org/922573003

Cr-Commit-Position: refs/heads/master@{#26660}