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}

Load prototype from map in PropertyHandlerCompiler::CheckPrototypes.

BUG=v8:3629
LOG=N
TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/753223002

Cr-Commit-Position: refs/heads/master@{#25490}

Disable regress-3717 for gc-stress.

TBR=ulan@chromium.org
BUG=v8:3723
LOG=N

Review URL: https://codereview.chromium.org/749283002

Cr-Commit-Position: refs/heads/master@{#25489}

Remove lineprocessor sample.

This sample used to demonstrate the usage of the DebuggerAgent. The latter
has been removed, so this sample has no point anymore.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/754043002

Cr-Commit-Position: refs/heads/master@{#25488}

Remove v8::StartupData::compressed_size.

R=jochen@chromium.org

Review URL: https://codereview.chromium.org/739253006

Cr-Commit-Position: refs/heads/master@{#25487}

Correctly find shared function info for debugging when compiling eagerly.

R=ulan@chromium.org
BUG=v8:3717
LOG=N

Review URL: https://codereview.chromium.org/758523004

Cr-Commit-Position: refs/heads/master@{#25486}

Make use of post-scoping information to compute feedback vector requirements.

This avoids allocating vector ic slots that we don't use.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/758543002

Cr-Commit-Position: refs/heads/master@{#25485}

Dictionary-mode PropertyDetails printing fixed.

BUG=chromium:435974
LOG=N

Review URL: https://codereview.chromium.org/755583003

Cr-Commit-Position: refs/heads/master@{#25484}

Reland of "Enable inobject double fields unboxing for 64-bit archs."

Review URL: https://codereview.chromium.org/751643005

Cr-Commit-Position: refs/heads/master@{#25483}

Reland of "TransitionArray::Search() now returns insertion index if the entry was not found."

Review URL: https://codereview.chromium.org/739013004

Cr-Commit-Position: refs/heads/master@{#25482}

Ensure external snapshot is only set once.

BUG=421063

Review URL: https://codereview.chromium.org/746263002

Cr-Commit-Position: refs/heads/master@{#25481}

The file snapshot_blob_host.bin was supposed to be generated when building the host toolset. However, the file snapshot_blob.bin was being generated instead, under every set of conditions.

Because of this, every time we build the host toolset, snapshot_blob_host.bin is not found. This causes the target (v8_external_snapshot) that generates such file to be run. This target generates snapshot_blob.bin instead of snapshot_blob_host.bin. This in turn causes all the targets that depend on snapshot_blob.bin to run again.

After this, we still don't have snapshot_blob_host.bin. So the next time we build, the whole process described above happens again.

BUG=421063

Review URL: https://codereview.chromium.org/741223002

Cr-Commit-Position: refs/heads/master@{#25480}

[turbofan] Combine Word32And with Int32Add and negative power of two.

TEST=unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/749233002

Cr-Commit-Position: refs/heads/master@{#25479}

Don't verify evacuation when it is not completed.

BUG=

Review URL: https://codereview.chromium.org/756553002

Cr-Commit-Position: refs/heads/master@{#25478}

[turbofan] Dump graph in RPO order as text.

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/754803002

Cr-Commit-Position: refs/heads/master@{#25477}

Fix RegExp.source for uncompiled regexp.

R=jkummerow@chromium.org
BUG=435825
LOG=N

Review URL: https://codereview.chromium.org/753983002

Cr-Commit-Position: refs/heads/master@{#25476}

[turbofan] Recognize sign extension of 8-bit and 16-bit values on arm64.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/730183005

Cr-Commit-Position: refs/heads/master@{#25475}

Added test cases for truncating stores.

Review URL: https://codereview.chromium.org/741643003

Cr-Commit-Position: refs/heads/master@{#25474}

don't use to-be-deprecated Value::To* without isolate parameter

R=svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/725293003

Cr-Commit-Position: refs/heads/master@{#25473}

Fix alignment of Code::kConstantPoolOffset.

This is needed for 64bit alignment sensitive platforms (PowerPC)
Exposed bugs with new GC compare and swap changes updating the
field.

Example failing test:
out/ppc64.debug/cctest  test-decls/ExistsInPrototype

BUG=

Review URL: https://codereview.chromium.org/740443002

Cr-Commit-Position: refs/heads/master@{#25472}

remove some isolate::currents from api.cc

R=svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/691513005

Cr-Commit-Position: refs/heads/master@{#25471}

Revert of Enable inobject double fields unboxing for 64-bit archs. (patchset #3 id:40001 of https://codereview.chromium.org/753503002/)

Reason for revert:
GCMole and gc-stress issues.

Original issue's description:
> Enable inobject double fields unboxing for 64-bit archs.

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

Review URL: https://codereview.chromium.org/751863002

Cr-Commit-Position: refs/heads/master@{#25470}

Enable inobject double fields unboxing for 64-bit archs.

Review URL: https://codereview.chromium.org/753503002

Cr-Commit-Position: refs/heads/master@{#25469}

harmony-scoping: Disallow cross-script assignment to const

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

Review URL: https://codereview.chromium.org/745963002

Cr-Commit-Position: refs/heads/master@{#25468}

Revert "Remove deprecated ShouldSelfOptimize machinery."

This reverts commit 9da92c1a336e because of performance regressions.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/752613002

Cr-Commit-Position: refs/heads/master@{#25467}

[turbofan]: remove optimization of adds/subs to inc and dec

They generally cause regressions on most modern Intel chips. Replace them with
addl/subl.

Review URL: https://codereview.chromium.org/737153003

Cr-Commit-Position: refs/heads/master@{#25466}

[turbofan] put late ssa deconstruction in register allocator behind a flag

BUG=

Review URL: https://codereview.chromium.org/751543002

Cr-Commit-Position: refs/heads/master@{#25465}

Rip out bzip compression for native sources.

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/750543002

Cr-Commit-Position: refs/heads/master@{#25464}

Slightly improve tests that rely on lazy compilation.

R=rossberg@chromium.org
BUG=v8:3712
LOG=N

Review URL: https://codereview.chromium.org/743843003

Cr-Commit-Position: refs/heads/master@{#25463}

Introduce a flag to change the new space growth factor

A useful value would be 4, so we get 1, 4, 16MB (instead of the default
value 2 which leads to 1, 2, 4, 8, 16)

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

Review URL: https://codereview.chromium.org/753513002

Cr-Commit-Position: refs/heads/master@{#25462}

[turbofan] put spill slot reuse behind a flag

BUG=

Review URL: https://codereview.chromium.org/748773002

Cr-Commit-Position: refs/heads/master@{#25461}

ARM64: skip flaky mozilla/ecma/Date/15.9.5.26-1 until it is fixed.

BUG=v8:3716
LOG=N

Review URL: https://codereview.chromium.org/746983002

Cr-Commit-Position: refs/heads/master@{#25460}

Remove deprecated ShouldSelfOptimize machinery.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/582683002

Cr-Commit-Position: refs/heads/master@{#25459}

Fix mozilla expectations after regexp change.

TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/749963002

Cr-Commit-Position: refs/heads/master@{#25458}

Correctly escape RegExp source.

R=ulan@chromium.org
BUG=v8:3229
LOG=N

Review URL: https://codereview.chromium.org/736003002

Cr-Commit-Position: refs/heads/master@{#25457}

Assert to protect against polymorphic string loads fires on valid stores.

BUG=435477
LOG=N
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/751513002

Cr-Commit-Position: refs/heads/master@{#25456}

Fix for 435073: CHECK failure in CHECK(p->IsSmi()) failed.

The bug was an error when copying arrays in crankshaft. If it's a holey smi
array, the copy must be done as FAST_HOLEY_ELEMENTS to prevent representation
changes from being inserted that deopt on encountering the hole.

Also, prevent inlining array pop() and shift() if the length is read-only.

BUG=435073
LOG=N
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/737383002

Cr-Commit-Position: refs/heads/master@{#25455}

[turbofan] Avoid useless zero-extension on arm64.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/737733002

Cr-Commit-Position: refs/heads/master@{#25454}

dump compiler stats from d8 on direct exit from js

BUG=

Review URL: https://codereview.chromium.org/753483002

Cr-Commit-Position: refs/heads/master@{#25453}

Fix the compilation issue for turbofan unsupported backend which
is introduced by https://chromium.googlesource.com/v8/v8/+/aed26c05a50b2a1257ef8accc67143825f2e1f60.
( [turbofan] Clean up and factor out branch generation logic.)

BUG=

Review URL: https://codereview.chromium.org/748673002

Cr-Commit-Position: refs/heads/master@{#25452}

MIPS: [turbofan] Clean up and factor out branch generation logic.

Port aed26c05a50b2a1257ef8accc67143825f2e1f60

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/742243003

Cr-Commit-Position: refs/heads/master@{#25451}

Cache template literal callSiteObj

BUG=v8:3230
LOG=y

Review URL: https://codereview.chromium.org/742643003

Cr-Commit-Position: refs/heads/master@{#25450}

Do not put D8 and TEST natives into the external snapshot.

D8 natives, in particular, will cause Windows static builds to not link due to another definition in the generated file d8-js.cc.

BUG=421063

Review URL: https://codereview.chromium.org/738153003

Cr-Commit-Position: refs/heads/master@{#25449}

Rename String.prototype.contains to 'includes'.

Per TC39 Nov 2014 decison.

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

Committed: https://chromium.googlesource.com/v8/v8/+/b5379216e23ff0ec734e70361dd07057c2421c96

Review URL: https://codereview.chromium.org/742963002

Cr-Commit-Position: refs/heads/master@{#25448}

Do not bailout from optimizing functions that use f(x, arguments)
if there is not enough type-feedback to detect that f is Function.prototype.apply.

BUG=v8:3709
LOG=N
TEST=mjsunit/regress/regress-3709

Review URL: https://codereview.chromium.org/736043002

Cr-Commit-Position: refs/heads/master@{#25447}

[turbofan] Clean up and factor out branch generation logic.

R=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/745633002

Cr-Commit-Position: refs/heads/master@{#25446}

Remove superflous SharedFunctionInfo::uses_super call.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/736383002

Cr-Commit-Position: refs/heads/master@{#25445}

When optimizing deserialized code, make sure IC state is preserved.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/737373003

Cr-Commit-Position: refs/heads/master@{#25444}

[turbofan] use double temp registers for stack-stack swap on arm64

TBR=vogelheim@chromium.org

BUG=

Review URL: https://codereview.chromium.org/744743002

Cr-Commit-Position: refs/heads/master@{#25443}

Fix Regress3540 after r25441.

BUG=
TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/746443002

Cr-Commit-Position: refs/heads/master@{#25442}

Reserve code range block for evacuation.

If we run out of code range, then GC wouldn't be able to compact code space,
because it wouldn't be able to allocate a new page. This can cause code space
fragmentation and OOM crashes.

BUG=chromium:430118
LOG=Y

Review URL: https://codereview.chromium.org/742733002

Cr-Commit-Position: refs/heads/master@{#25441}

[turbofan] More aggressive reuse of spill slots in the register allocator.

BUG=

Review URL: https://codereview.chromium.org/725083004

Cr-Commit-Position: refs/heads/master@{#25440}

[turbofan]: More optimizations to add and subtract operations on x64

- Use "leal" for subtraction of integer constant when non-constant input to
  subtract is used more than once.
- Use "incl", "decl", and "addl" when they are smaller/cheaper than their
  leal/addl/subl equivalant.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/738073002

Cr-Commit-Position: refs/heads/master@{#25439}

[turbofan] remove redundant '& 0x1F' for shifts.

JavaScript shifts perform an implicit '& 0x1F' on their right operand, this
patch removes it when the underlying architecture already does it.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/732103002

Cr-Commit-Position: refs/heads/master@{#25438}

Enable TurboFan for Win64 targets.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/743963002

Cr-Commit-Position: refs/heads/master@{#25437}

Fix lower bound violation

R=jarin@chromium.org
BUG=433332
LOG=N

Review URL: https://codereview.chromium.org/739563002

Cr-Commit-Position: refs/heads/master@{#25436}

Disable classes in sloppy mode unless --harmony-sloppy is set

Also clean up flag names a little.

Baseline: https://codereview.chromium.org/713413003/

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

Review URL: https://codereview.chromium.org/722203006

Cr-Commit-Position: refs/heads/master@{#25435}

Conditional flags for tests - set JS stack size for simulators.

There are separated JS and C stacks on simulators so for some stack
extensive tests (like mozilla/js1_5/extensions/regress-355497) might
cause a C stack overflow and that overflow is not caught by V8. It is
not an issue on real HW. Increasing the C stack also solves the problem
but we have already FLAG_sim_stack_size flag to control the JS stack
size.

This patch makes it possible to add flags to tests conditionally in
.status files.

TEST=mozilla/js1_5/extensions/regress-355497
BUG=v8:3152
LOG=N

Review URL: https://codereview.chromium.org/735723006

Cr-Commit-Position: refs/heads/master@{#25434}

Implement log10 via fdlibm port.

R=rtoy@chromium.org
BUG=v8:3579
LOG=N

Review URL: https://codereview.chromium.org/739913003

Cr-Commit-Position: refs/heads/master@{#25433}

Revert of Rename String.prototype.contains to 'includes'. (patchset #1 id:1 of https://codereview.chromium.org/742963002/)

Reason for revert:
Breaks test262-es6:
http://build.chromium.org/p/client.v8/builders/V8%20Linux/builds/1289

Original issue's description:
> Rename String.prototype.contains to 'includes'.
>
> Per TC39 Nov 2014 decison.
>
> R=arv@chromium.org,yangguo@chromium.org
> LOG=Y
>
> Committed: https://chromium.googlesource.com/v8/v8/+/b5379216e23ff0ec734e70361dd07057c2421c96

TBR=arv@chromium.org,yangguo@chromium.org,dslomov@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/745543002

Cr-Commit-Position: refs/heads/master@{#25432}

Remove --clever-optimizations

We should always be clever

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

Review URL: https://codereview.chromium.org/723023003

Cr-Commit-Position: refs/heads/master@{#25431}

Rename String.prototype.contains to 'includes'.

Per TC39 Nov 2014 decison.

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

Review URL: https://codereview.chromium.org/742963002

Cr-Commit-Position: refs/heads/master@{#25430}

Remove Weak{Map,Set}.prototype.clear.

Per Nov 2014 TC39 decision.

R=adamk@chromium.org
LOG=Y

Review URL: https://codereview.chromium.org/739303002

Cr-Commit-Position: refs/heads/master@{#25429}

Reduce ErrorsFutureStrictReservedWords test to make it faster

Since checking all possible combinations is taking so long this
reduces the test to test the odd cases (let, yield and static) as
well as a single ordinary case.

BUG=v8:3707
LOG=n

Review URL: https://codereview.chromium.org/724713004

Cr-Commit-Position: refs/heads/master@{#25428}

Removed unnecessary generalization of all fields in Map::GeneralizeRepresentation() (introduced in r25082).

This generalization caused unnecessary map deprecation when the transition tree of the split map is full.

BUG=chromium:431807
LOG=N

Review URL: https://codereview.chromium.org/736953003

Cr-Commit-Position: refs/heads/master@{#25427}

[turbofan]: delay ssa deconstruction in register allocator

BUG=

Review URL: https://codereview.chromium.org/738853002

Cr-Commit-Position: refs/heads/master@{#25426}

MIPS64: Prepare additonal code for turbofan landing.

TEST=
BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/735033002

Cr-Commit-Position: refs/heads/master@{#25425}

MIPS64: Add turbofan support for mips64.

TEST=
BUG=
R=danno@chromium.org, paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/732403002

Cr-Commit-Position: refs/heads/master@{#25424}

Allow stepping into Object.observe handlers.

BUG=chromium:432468
R=yangguo@chromium.org, adamk@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/739523002

Cr-Commit-Position: refs/heads/master@{#25423}

One instead of two runtime calls when initializing regexp.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/719403005

Cr-Commit-Position: refs/heads/master@{#25422}

Revert "Re-land r25392 Use a stub in crankshaft for grow store arrays."

Due to performance issue.
TBR=danno@chromium.org

Review URL: https://codereview.chromium.org/735323002

Cr-Commit-Position: refs/heads/master@{#25421}

Enable "strict mode"; for debugger scripts

BUG=v8:3708

Review URL: https://codereview.chromium.org/736583007

Cr-Commit-Position: refs/heads/master@{#25420}

Update default trybots.

Add new gn trybot and remove nosnap dbg for being too slow.
It can be used on demand.

BUG=chromium:353487
LOG=n

Review URL: https://codereview.chromium.org/743643002

Cr-Commit-Position: refs/heads/master@{#25419}