MIPS: Use weak cells in map checks in polymorphic ICs.

Port 45a36948e1bb0f02d395ecbcfe6306553898268b

Fix typo in the mips ports.

BUG=

Review URL: https://codereview.chromium.org/767623003

Cr-Commit-Position: refs/heads/master@{#25590}

harmony-classes: Fix some issues with syntactic restriction on super(...).

R=arv@chromium.org
BUG=v8:3330
LOG=N

Review URL: https://codereview.chromium.org/770843002

Cr-Commit-Position: refs/heads/master@{#25589}

Use just one marking deque.

BUG=

Review URL: https://codereview.chromium.org/770453003

Cr-Commit-Position: refs/heads/master@{#25588}

[turbofan] Add a PhaseScope for initialization.

R=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/773443002

Cr-Commit-Position: refs/heads/master@{#25587}

Improved Makefile.android's readability a bit.

Review URL: https://codereview.chromium.org/770783003

Cr-Commit-Position: refs/heads/master@{#25586}

Do not call Heap::IterateAndMarkPointersToFromSpace() for unboxed double fields.

BUG=chromium:437143
LOG=N

Review URL: https://codereview.chromium.org/768113002

Cr-Commit-Position: refs/heads/master@{#25585}

Android ARM: enable PIE.

BUG=

Review URL: https://codereview.chromium.org/757103003

Cr-Commit-Position: refs/heads/master@{#25584}

[turbofan] NodeMarker in ControlReducer.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/767743003

Cr-Commit-Position: refs/heads/master@{#25583}

[x64] introduce vex prefix version of float64 arithmetic binop

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/764863002

Patch from Weiliang Lin <weiliang.lin@intel.com>.

Cr-Commit-Position: refs/heads/master@{#25582}

Use weak cells in map checks in polymorphic ICs.

BUG=v8:3663
LOG=N

Review URL: https://codereview.chromium.org/753993003

Cr-Commit-Position: refs/heads/master@{#25581}

[turbofan]: Use "leal" more prevasively on x64

Only use "addl" and "subl" in cases that have been measured to be
faster (currently only immediate operations).

Review URL: https://codereview.chromium.org/735293004

Cr-Commit-Position: refs/heads/master@{#25580}

Fix clang++ warnings on -Wtautological-constant-out-of-range-compare

BUG=v8:3730
LOG=N
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/750093003

Cr-Commit-Position: refs/heads/master@{#25579}

Make sure we have non-zero idle time even after rounding to size_t

BUG=v8:3728
R=machenbach@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/764263002

Cr-Commit-Position: refs/heads/master@{#25578}

Introduce a kill-switch for shipping features.

R=rossberg@chromium.org
TBR=hpayer@chromium.org

Committed: https://chromium.googlesource.com/v8/v8/+/d6285620868b15c84eb9affa59f6b4e869f074b8

Review URL: https://codereview.chromium.org/763273002

Cr-Commit-Position: refs/heads/master@{#25577}

Abstract platform in perf runner.

This is basically a refactoring that extracts desktop
specific code into a separate class.

Also adds flags for android runs (not used yet).

BUG=chromium:374740
LOG=n
TEST=python -m unittest run_perf_test
NOTRY=true

Review URL: https://codereview.chromium.org/762163002

Cr-Commit-Position: refs/heads/master@{#25576}

Remove deprecated NodeData class.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/768853002

Cr-Commit-Position: refs/heads/master@{#25575}

Revert of Introduce a kill-switch for shipping features. (patchset #2 id:20001 of https://codereview.chromium.org/763273002/)

Reason for revert:
Reverted for breaking nosnap: http://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20nosnap/builds/1003/steps/Check/logs/Threading3

Original issue's description:
> Introduce a kill-switch for shipping features.
>
> R=rossberg@chromium.org
>
> Committed: https://chromium.googlesource.com/v8/v8/+/d6285620868b15c84eb9affa59f6b4e869f074b8

TBR=rossberg@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/763353002

Cr-Commit-Position: refs/heads/master@{#25574}

Stage @@toStringTag (--harmony-tostring)

R=rossberg@chromium.org,caitpotter88@gmail.com
LOG=Y

Review URL: https://codereview.chromium.org/768833002

Cr-Commit-Position: refs/heads/master@{#25573}

De-generify the GenericNode.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/756073004

Cr-Commit-Position: refs/heads/master@{#25572}

Expose generator object internal properties via mirrors.

BUG=v8:3292
R=yangguo@chromium.org, wingo@igalia.com
LOG=N

Review URL: https://codereview.chromium.org/760303002

Cr-Commit-Position: refs/heads/master@{#25571}

Introduce a kill-switch for shipping features.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/763273002

Cr-Commit-Position: refs/heads/master@{#25570}

De-generify the GenericGraph.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/767733002

Cr-Commit-Position: refs/heads/master@{#25569}

MIPS64: Fix MULT in simulator to conform the spec.

TEST=mjsunit/numops-fuzz-part4
BUG=
R=balazs.kilvady@imgtec.com

Review URL: https://codereview.chromium.org/756073003

Cr-Commit-Position: refs/heads/master@{#25568}

[turbofan] Add NodeMarker and use it in the GraphReducer.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/768763002

Cr-Commit-Position: refs/heads/master@{#25567}

Serializer: use opcode to signal new chunk.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/757813003

Cr-Commit-Position: refs/heads/master@{#25566}

Remove deprecated pieces from generic algorithm.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/752263003

Cr-Commit-Position: refs/heads/master@{#25565}

Use incremental marking deque in idle notification.

BUG=

Review URL: https://codereview.chromium.org/766663006

Cr-Commit-Position: refs/heads/master@{#25564}

Make resources config ready for android test runner.

This switches off the resources feature. It will be solely
used for configuring files to be copied to android devices
in a follow up CL.

TBR=svenpanne@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/764013002

Cr-Commit-Position: refs/heads/master@{#25563}

add fast path for hashing small cons strings

R=yangguo@chromium.org
LOG=N

BUG=437280

Review URL: https://codereview.chromium.org/769453002

Cr-Commit-Position: refs/heads/master@{#25562}

Remove duplicate code for searching SharedFunctionInfo.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/762123002

Cr-Commit-Position: refs/heads/master@{#25561}

Use deadline in IdleNotification.

BUG=417668
LOG=n

Review URL: https://codereview.chromium.org/750813003

Cr-Commit-Position: refs/heads/master@{#25560}

Add test flags feature to perf runner.

TBR=svenpanne@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/722023006

Cr-Commit-Position: refs/heads/master@{#25559}

Fix candidate lookup in auto push script.

NOTRY=true
BUG=chromium:431669
LOG=n
TBR=jkummerow@chromium.org
TEST=./script_test.py

Review URL: https://codereview.chromium.org/765943002

Cr-Commit-Position: refs/heads/master@{#25558}

Fix nosnap build

TBR=rossberg@chromium.org

Review URL: https://codereview.chromium.org/762083002

Cr-Commit-Position: refs/heads/master@{#25557}

X87: Flesh out vector ic state query and set mechanisms.

port c142994f742b52cd59aa15d0961d4b0034bcbf88

original commit message:

    Flesh out vector ic state query and set mechanisms.

    The IC system now fully integrates the vector concept and can
    handle loads and keyed loads vector-based.

BUG=

Review URL: https://codereview.chromium.org/763953002

Cr-Commit-Position: refs/heads/master@{#25556}

harmony-classes: Implement 'super(...)' call syntactic restriction.

R=rossberg@chromium.org,arv@chromium.org
BUG=v8:3330
LOG=N

Review URL: https://codereview.chromium.org/766663003

Cr-Commit-Position: refs/heads/master@{#25555}

MIPS: Flesh out vector ic state query and set mechanisms.

Port c142994f742b52cd59aa15d0961d4b0034bcbf88

Original commit message:
The IC system now fully integrates the vector concept and can
handle loads and keyed loads vector-based.

BUG=
R=akos.palfi@imgtec.com

Review URL: https://codereview.chromium.org/752553005

Patch from Balazs Kilvady <balazs.kilvady@imgtec.com>.

Cr-Commit-Position: refs/heads/master@{#25554}

Set clang directory in gyp.

BUG=

Review URL: https://codereview.chromium.org/764803002

Cr-Commit-Position: refs/heads/master@{#25553}

Flesh out vector ic state query and set mechanisms.

The IC system now fully integrates the vector concept and can
handle loads and keyed loads vector-based.

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/754303003

Cr-Commit-Position: refs/heads/master@{#25552}

[turbofan] Avoid repeatedly revisiting inputs in GraphReducer.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/753073009

Cr-Commit-Position: refs/heads/master@{#25551}

Set @@toStringTag on GeneratorFunction prototype.

R=caitpotter88@gmail.com
BUG=v8:3502
LOG=N

Review URL: https://codereview.chromium.org/764823002

Cr-Commit-Position: refs/heads/master@{#25550}

Make TemplateLiteral hashing algorithm more memory efficient

Previously, a separate string to be hashed (in order to help determine the need to
use a cached Template Call Site) was built up by joining UTF8 spans within a template.

Now, the hash key is generated from the original spans, removing the need to allocate a new
buffer and copy bytes into it.

BUG=

Review URL: https://codereview.chromium.org/765473006

Cr-Commit-Position: refs/heads/master@{#25549}

Remove deprecated constant helpers from JSGenericLowering.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/761143002

Cr-Commit-Position: refs/heads/master@{#25548}

Fix reduction result for branches in generic lowering.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/750333003

Cr-Commit-Position: refs/heads/master@{#25547}

Just account for context disposal garbage collections in context disposal stats counters.

BUG=

Review URL: https://codereview.chromium.org/765773002

Cr-Commit-Position: refs/heads/master@{#25546}

Re-land: Distinguish beween final incremental mark-compact and full mark-compact event in IdleNotification.

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/765743002

Cr-Commit-Position: refs/heads/master@{#25545}

Just finalize incremental marking when marking is done in idle notification.

BUG=

Review URL: https://codereview.chromium.org/733893003

Cr-Commit-Position: refs/heads/master@{#25544}

Start immediate dominator propagation at entry to floating control.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/761673004

Cr-Commit-Position: refs/heads/master@{#25543}

Switch backedge table in scheduler to use ZoneVector.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/761733002

Cr-Commit-Position: refs/heads/master@{#25542}

MIPS: harmony-scoping: make assignment to 'const' a late error.

Port 6ac4de87a8b01500b066a3e401e921d2d84b42db

Original commit message:
Per TC39 Nov 2014 decision.

This patch also changes behavior for "legacy const": assignments to sloppy const in strict mode is now also a type error. This fixes v8:2243 and also brings us in compliance with other engines re assignment to function names (see updated webkit test), but might have bigger implications.
That change can easily be reverted by changing Variable::IsSignallingAssignmentToConst.

BUG=v8:3713,v8:2243
LOG=N

Review URL: https://codereview.chromium.org/766703002

Cr-Commit-Position: refs/heads/master@{#25541}

Introduce a new growth criterion for the new space behind a flag

With this flag, we grow if more than 10% survived the last scavenge.

BUG=none
R=hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/753543002

Cr-Commit-Position: refs/heads/master@{#25540}

Just print interesting idle notification events in --trace-idle-notification.

BUG=

Review URL: https://codereview.chromium.org/763063002

Cr-Commit-Position: refs/heads/master@{#25539}

Add support for downloading clang

Still requires changes to gyp files to select the built-in clang as
compiler and make clang the default on the platforms we want it.

BUG=
R=dcarney@chromium.org,machenbach@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/745963005

Cr-Commit-Position: refs/heads/master@{#25538}

Add interceptor support for symbols

a revival of https://codereview.chromium.org/467013003

R=rossberg@chromium.org

BUG=

Review URL: https://codereview.chromium.org/760883002

Cr-Commit-Position: refs/heads/master@{#25537}

Ship harmony-strings

R=rossberg@chromium.org, yangguo@chromium.org
LOG=Y

Review URL: https://codereview.chromium.org/761913002

Cr-Commit-Position: refs/heads/master@{#25536}

Fast-to-slow migration should wipe out in-object space if it exists in the object after migration.

BUG=chromium:436816
LOG=N

Review URL: https://codereview.chromium.org/765473004

Cr-Commit-Position: refs/heads/master@{#25535}

Ensure double alignment when deserializing.

R=rmcilroy@chromium.org
BUG=chromium:436510
LOG=N
TEST=compile with V8_OOL_CONSTANT_POOL=1, run d8 with --verify-heap --test

Review URL: https://codereview.chromium.org/759823006

Cr-Commit-Position: refs/heads/master@{#25534}

[turbofan] add initial move optimizer

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/750813004

Cr-Commit-Position: refs/heads/master@{#25533}

X87: harmony-scoping: make assignment to 'const' a late error.

port 6ac4de87a8b01500b066a3e401e921d2d84b42db

original commit message:
  harmony-scoping: make assignment to 'const' a late error.

  Per TC39 Nov 2014 decision. This patch also changes behavior for "legacy const":
  assignments to sloppy const in strict mode is now also a type error. This fixes
  v8:2243 and also brings us in compliance with other engines re assignment to function
  names (see updated webkit test), but might have bigger implications. That change can
  easily be reverted by changing Variable::IsSignallingAssignmentToConst.

BUG=
R=dslomov@chromium.org, weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/763033002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

Cr-Commit-Position: refs/heads/master@{#25532}

Move linked list for RPO order into BasicBlock itself.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/762723004

Cr-Commit-Position: refs/heads/master@{#25531}

Map::CopyGeneralizeAllRepresentations() left incorrect layout descriptor in a new map.

BUG=chromium:436820
LOG=N

Review URL: https://codereview.chromium.org/759823004

Cr-Commit-Position: refs/heads/master@{#25530}

Fix raw TemplateLiteral spans with non-ascii characters

BUG=v8:3710

Review URL: https://codereview.chromium.org/745233002

Cr-Commit-Position: refs/heads/master@{#25529}

Abort optimization in corner case.

The %OptimizeFunctionOnNextCall sledgehammer can cause a function to be
marked for optimization before it's ever been compiled by fullcode.
This can lead to the situation where a function doesn't have optimization
disabled until we try to compile it optimized.

Basically, the assert should just handle this case more gracefully.

R=yangguo@chromium.org
BUG=436893
LOG=Y

Review URL: https://codereview.chromium.org/760063002

Cr-Commit-Position: refs/heads/master@{#25528}

Do not try to inline if the function has an illegal redeclaration.

R=mvstanton@chromium.org
BUG=chromium:436896
LOG=n

Review URL: https://codereview.chromium.org/755333003

Cr-Commit-Position: refs/heads/master@{#25527}

Push roll candidates based on candidate ref instead of lkgr.

This pushes v8 to the candidates branch based on the
candidate ref, which is guaranteed to be the same for 8
hours.

The candidate ref is maintained by this bot:
http://build.chromium.org/p/client.v8/builders/Auto-roll%20-%20release%20process

NOTRY=true
BUG=chromium:431669
LOG=n

Review URL: https://codereview.chromium.org/760793003

Cr-Commit-Position: refs/heads/master@{#25526}

Reuse CFGBuilder in the scheduler to save memory.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/755353003

Cr-Commit-Position: refs/heads/master@{#25525}

Make GCTracer not reentrant.

BUG=

Review URL: https://codereview.chromium.org/754023003

Cr-Commit-Position: refs/heads/master@{#25524}

Some micro-optimizations in the scheduler.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/764533003

Cr-Commit-Position: refs/heads/master@{#25523}

Fix Windows 32.

TBR=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/755323007

Cr-Commit-Position: refs/heads/master@{#25522}

[turbofan] Implement jump threading after register allocation.

R=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/754843002

Cr-Commit-Position: refs/heads/master@{#25521}

Stage ES6 block scoping.

R=rossberg@chromium.org
BUG=v8:2198
LOG=Y

Review URL: https://codereview.chromium.org/751503004

Cr-Commit-Position: refs/heads/master@{#25520}

Introduce legacy const slots in correct context.

R=rossberg@chromium.org
BUG=chromium:410030
LOG=Y

Review URL: https://codereview.chromium.org/756293004

Cr-Commit-Position: refs/heads/master@{#25519}

Don't use ConsStringIterator to compute string hashes

R=yangguo@chromium.org

BUG=

Review URL: https://codereview.chromium.org/762773002

Cr-Commit-Position: refs/heads/master@{#25518}

[turbofan] Recognize rotate right.

Extended the rotate left detection code.

BUG=

Review URL: https://codereview.chromium.org/760523004

Cr-Commit-Position: refs/heads/master@{#25517}

harmony-scoping: make assignment to 'const' a late error.

Per TC39 Nov 2014 decision.

This patch also changes behavior for "legacy const": assignments to sloppy const in strict mode is now also a type error. This fixes v8:2243 and also brings us in compliance with other engines re assignment to function names (see updated webkit test), but might have bigger implications.
That change can easily be reverted by changing Variable::IsSignallingAssignmentToConst.

BUG=v8:3713,v8:2243
LOG=N

Review URL: https://codereview.chromium.org/749633002

Cr-Commit-Position: refs/heads/master@{#25516}

[arm] Fix recognition of VNEG.

TEST=mjsunit,unittests
R=svenpanne@chromium.org

Committed: https://chromium.googlesource.com/v8/v8/+/2aed882fe74dbf9210159babe30fedccd900e7cf

Review URL: https://codereview.chromium.org/762493006

Cr-Commit-Position: refs/heads/master@{#25515}

Revert of [arm] Fix recognition of VNEG. (patchset #3 id:40001 of https://codereview.chromium.org/762493006/)

Reason for revert:
Breaks arm compilation.

Original issue's description:
> [arm] Fix recognition of VNEG.
>
> TEST=mjsunit,unittests
> R=svenpanne@chromium.org
>
> Committed: https://chromium.googlesource.com/v8/v8/+/2aed882fe74dbf9210159babe30fedccd900e7cf

TBR=svenpanne@chromium.org,bmeurer@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/751653004

Cr-Commit-Position: refs/heads/master@{#25514}

[arm] Fix recognition of VNEG.

TEST=mjsunit,unittests
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/762493006

Cr-Commit-Position: refs/heads/master@{#25513}

Double timeout for slow tests.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/752733003

Cr-Commit-Position: refs/heads/master@{#25512}

Mark slow tests as slow.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/755283004

Cr-Commit-Position: refs/heads/master@{#25511}

Disable ParserSync test for now, it takes waaaaay too long.

Running this in x64.release mode on a powerful HP620 takes 4 seconds,
this is at least 2 orders of magnitude too slow and leads to tons of
false positives on our build bots due to timeouts. As it is, the
cost-benefit ratio is far too low.

The whole approach needs to be changed: Instead of trying to exhaust
some search space in unit tests, this should be turned into a fuzzing
test where only a small but random number of things are tested. The
exhaustive approach can be done separately, but definitely not in the
unit tests.

BUG=v8:3707

Review URL: https://codereview.chromium.org/762743002

Cr-Commit-Position: refs/heads/master@{#25510}

[x64] Introduce FMA3 instructions on scalar data elements.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/757503002

Patch from Weiliang Lin <weiliang.lin@intel.com>.

Cr-Commit-Position: refs/heads/master@{#25509}

[turbofan] Use special constant type for RPO block number operands.

R=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/758073002

Cr-Commit-Position: refs/heads/master@{#25508}

Document that Isolate::GetCurrent() must not be called before initialization

Also, add a check for debug mode.

BUG=none
R=dcarney@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/758043002

Cr-Commit-Position: refs/heads/master@{#25507}

Revert "Distinguish beween final incremental mark-compact and full mark-compact event in IdleNotification."

This reverts commit d15d453fa5aaeeb1f7e010a1baf71e7b3306802b for
breaking cctest/test-api/Threading3.

TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/758163003

Cr-Commit-Position: refs/heads/master@{#25506}

Move C++ flags for Android to cxxflags section

BUG=v8:3693
R=ulan@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/752063002

Cr-Commit-Position: refs/heads/master@{#25505}

Force inline Stirng::GetCharVector<>.

R=mvstanton@chromium.org
BUG=chromium:436447

Review URL: https://codereview.chromium.org/756983003

Cr-Commit-Position: refs/heads/master@{#25504}

harmony-scoping: Catch variable should be VAR, not LET

R=rossberg@chromium.org
BUG=v8:2858
LOG=N

Review URL: https://codereview.chromium.org/748113003

Cr-Commit-Position: refs/heads/master@{#25503}

Fixed race condition in HBranch::observed_input_representation.

Non-numeric static local variables are not thread-safe, and the case
at hand was a premature optimization anyway: The generated code for
the check in question is exactly the same when unfolded.

BUG=chromium:420483

Review URL: https://codereview.chromium.org/756903003

Cr-Commit-Position: refs/heads/master@{#25502}

Distinguish beween final incremental mark-compact and full mark-compact event in IdleNotification.

BUG=

Review URL: https://codereview.chromium.org/727323004

Cr-Commit-Position: refs/heads/master@{#25501}

Partially revert "Optimize function across closures."

BUG=chromium:434447

Review URL: https://codereview.chromium.org/755173002

Cr-Commit-Position: refs/heads/master@{#25500}

Refactor use of Isolate::use_crankshaft.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/755883003

Cr-Commit-Position: refs/heads/master@{#25499}

Reset code age on the cloned code when serializing.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/757983002

Cr-Commit-Position: refs/heads/master@{#25498}

MIPS64: Load prototype from map in PropertyHandlerCompiler::CheckPrototypes.

Port 100db75808486b9a85b5ba6384f27b3274438684

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/755693002

Cr-Commit-Position: refs/heads/master@{#25497}

[turbofan] Insert appropriate conversions for typed array stores.

BUG=

Review URL: https://codereview.chromium.org/758643003

Cr-Commit-Position: refs/heads/master@{#25496}

Fix platform unittests.

Follow-up to 87db4ff1f4d76eecb8f19d62f4c04279d56bf229, which added
suppressions to unittests.status and a special case for Android to the
ThreadLocalStorageTest, both of which are unneccessary and should be
handled differently for the GTest based unittests.

BUG=v8:3706
LOG=n
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/757913002

Cr-Commit-Position: refs/heads/master@{#25495}

Reduce context disposal gc overhead.

BUG=

Review URL: https://codereview.chromium.org/750963002

Cr-Commit-Position: refs/heads/master@{#25494}

Don't double smi-tag the mask used to check read-only / field mode in the dictionary-store-stub on X64

BUG=

Review URL: https://codereview.chromium.org/757673002

Cr-Commit-Position: refs/heads/master@{#25493}

Fix/suppress unittests broken on Android

cctest/test-threads/ThreadJoinSelf is suppressed for Android, but the
test has since been moved to unittests/Thread.SelfJoin. Move the
suppression to unittests.status.

unittests/ThreadLocalStorageTest.DoTest fails on older Android devices
as it assumes the availability of more TLS slots than many devices
implement. Test a smaller number of slots (32) on Android. Remove old
suppression of test-platform-tls/FastTLS (which no longer exists).

cctest/test-mark-compact/RegressJoinThreadsOnIsolateDeinit can't deal
with shared mappings. Check for 's' instead of '-'.

BUG=v8:3706
LOG=

Review URL: https://codereview.chromium.org/735863003

Cr-Commit-Position: refs/heads/master@{#25492}

[turbofan] Fix matching of the lea instruction.

Resets the scaled exponent to 0 when the scaling match fails.

BUG=

Review URL: https://codereview.chromium.org/756643002

Cr-Commit-Position: refs/heads/master@{#25491}