We don't need a lock for the output queue on the main thread

The output queue is supposed to be a lock-free anyways, we're just
temporarily abusing it by having multiple producers. For those, we need
the lock when enqueuing jobs.

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

Review URL: https://codereview.chromium.org/953883002

Cr-Commit-Position: refs/heads/master@{#26824}

Use mutex/condition variables to synchronize threads

Instead of semaphore and atomics

BUG=v8:3608
R=yangguo@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/950323002

Cr-Commit-Position: refs/heads/master@{#26823}

Invalidate property cells for non-existent properties properly.

R=verwaest@chromium.org
BUG=v8:3914
LOG=N

Review URL: https://codereview.chromium.org/945403008

Cr-Commit-Position: refs/heads/master@{#26822}

Switch to new branching model in auto-push script.

BUG=chromium:391261
LOG=n
TBR=tandrii@chromium.org
NOTRY=true

TEST=./script_test.py

Review URL: https://codereview.chromium.org/955613003

Cr-Commit-Position: refs/heads/master@{#26821}

[strong] Deprecate ellisions

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/950303002

Cr-Commit-Position: refs/heads/master@{#26820}

[turbofan] optimize moves into merges

BUG=

Review URL: https://codereview.chromium.org/755323011

Cr-Commit-Position: refs/heads/master@{#26819}

Fix bogus assertion in Debug::PrepareStep.

R=svenpanne@chromium.org
BUG=chromium:461042
LOG=N

Review URL: https://codereview.chromium.org/948313002

Cr-Commit-Position: refs/heads/master@{#26818}

[turbofan] Strength reduction for inline comparisons.

Perform strength reduction on machine operators with inline comparisons:

  CMP & 1 => CMP
  1 & CMP => CMP
  CMP << 31 >> 31 => CMP

Also strength reduce the following constructs:

  x + (0 - y) => x - y
  (0 - y) + x => x - y

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/951903003

Cr-Commit-Position: refs/heads/master@{#26817}

Make sure exception handlers are deferred.

R=bmeurer@chromium.org
TEST=unittests/SchedulerTest.CallException

Review URL: https://codereview.chromium.org/944903002

Cr-Commit-Position: refs/heads/master@{#26816}

Remove reinvented wheel for partial snapshot cache.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/946073003

Cr-Commit-Position: refs/heads/master@{#26815}

[turbofan] only use two gaps

BUG=

Review URL: https://codereview.chromium.org/948033002

Cr-Commit-Position: refs/heads/master@{#26814}

Drop Intrusive*TransitionIterators, use recursion instead.

We already use recursion to iterate over transition trees elsewhere, so this should be safe wrt. call stack height.

Review URL: https://codereview.chromium.org/942523003

Cr-Commit-Position: refs/heads/master@{#26813}

Get rid of recursive locks for job based recompilation

For flushing the input queue, use the input queue lock. Introduce an
explicit refcount to make sure we don't delete the thread object before
all jobs are finished.

BUG=v8:3608
R=yangguo@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/948863002

Cr-Commit-Position: refs/heads/master@{#26812}

NewError no longer returns a MaybeObject.

We no longer expect NewError to return an empty handle to signal termination
exception, since TryCall simply requests a new terminate exception interrupt.

BUG=chromium:403509
LOG=N

Review URL: https://codereview.chromium.org/952483002

Cr-Commit-Position: refs/heads/master@{#26811}

Reland "Correctly propagate terminate exception in TryCall."

BUG=v8:3892
LOG=Y

Review URL: https://codereview.chromium.org/953463002

Cr-Commit-Position: refs/heads/master@{#26810}

[turbofan] encode instruction operand as uint64_t

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/947153002

Cr-Commit-Position: refs/heads/master@{#26809}

[turbofan] Initial version of branch cloning.

This implements a special case of block cloning to recognize constructs like

 if (a ? b : c) { ... }

that happen to be generated by Emscripten quite often.

Review URL: https://codereview.chromium.org/947963002

Cr-Commit-Position: refs/heads/master@{#26808}

Revert extra commit

"for-of should throw if result object is not an object"

The CQ committed the CL twice

This reverts commit ab2591ed9332086581ee25ef735cd1b3bbd7e2f0.

BUG=None
TBR=adamk

Review URL: https://codereview.chromium.org/951133002

Cr-Commit-Position: refs/heads/master@{#26807}

for-of should throw if result object is not an object

This is done using desugaring. Before this we had:

  result = iterator.next()

with this we instead do:

  !%_IsSpecObject(result = iterator.next()) &&
      %ThrowIteratorResultNotAnObject(result)

BUG=v8:3916
LOG=N

Review URL: https://codereview.chromium.org/929733003

Cr-Commit-Position: refs/heads/master@{#26806}

for-of should throw if result object is not an object

This is done using desugaring. Before this we had:

  result = iterator.next()

with this we instead do:

  !%_IsSpecObject(result = iterator.next()) &&
      %ThrowIteratorResultNotAnObject(result)

BUG=v8:3916
LOG=N

Review URL: https://codereview.chromium.org/929733003

Cr-Commit-Position: refs/heads/master@{#26805}

Update GN build files with the cpu_arch -> current_cpu change.

R=machenbach@chromium.org, jochen@chromium.org
BUG=crbug.com/344767
LOG=Y

Review URL: https://codereview.chromium.org/946023002

Cr-Commit-Position: refs/heads/master@{#26804}

ES6 collections: Fix order of constructor logic

The adder should be gotten before the iterator.

Motivation: Once this is done we should be able to use a for-of loop
instead which leads to cleaner code and correct behavior once the
for-of loop correctly supports abrupt completion.

BUG=None
LOG=N
R=adamk

Review URL: https://codereview.chromium.org/949933002

Cr-Commit-Position: refs/heads/master@{#26803}

Prototype objects never share their map, and hence cannot be in deprecated state.

Review URL: https://codereview.chromium.org/955433002

Cr-Commit-Position: refs/heads/master@{#26802}

Promise.all and race should work with iterables

BUG=v8:3705
LOG=N
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/948843004

Cr-Commit-Position: refs/heads/master@{#26801}

Merge LookupResult into PropertyAccessInfo

BUG=

Review URL: https://codereview.chromium.org/939623004

Cr-Commit-Position: refs/heads/master@{#26800}

Revert "The expected key is a valid identifier, which is already free of \\, <0x20, "."
The optimization is invalid as indicated by the test.

BUG=
TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/950873003

Cr-Commit-Position: refs/heads/master@{#26799}

Bump up version for 4.3 candidate.

NOTRY=true
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/948003002

Cr-Commit-Position: refs/heads/master@{#26798}

MIPS: [turbofan] Fix several int vs size_t issues.

Port 9c1407da781b38d66b6465118d41f61c66cba12b

BUG=

Review URL: https://codereview.chromium.org/948843002

Cr-Commit-Position: refs/heads/master@{#26797}

emit premonomorphic ics for loads/stores in optimized code

R=verwaest@chromium.org

BUG=

Review URL: https://codereview.chromium.org/892383003

Cr-Commit-Position: refs/heads/master@{#26796}

More tests added to cctest/tests/test-migrations.cc.

This also includes a regression test for crbug/459512.

BUG=chromium:459512
LOG=N

Review URL: https://codereview.chromium.org/947103002

Cr-Commit-Position: refs/heads/master@{#26795}

disable some harmony scoping tests

R=verwaest@chromium.org

BUG=v8:3914
LOG=N

Review URL: https://codereview.chromium.org/914333002

Cr-Commit-Position: refs/heads/master@{#26794}

MIPS64: Implement optimization utilizing signaling NaN for holes in double arrays.

TEST=
BUG=

Review URL: https://codereview.chromium.org/945823002

Cr-Commit-Position: refs/heads/master@{#26793}

Revert of Correctly propagate terminate exception in TryCall. (patchset #2 id:20001 of https://codereview.chromium.org/928193002/)

Reason for revert:
See crbug.com/460412 and crbug.com/460356. Reverting on master in order to roll from master again soon.

Original issue's description:
> Correctly propagate terminate exception in TryCall.
>
> BUG=v8:3892
> LOG=Y
>
> Committed: https://crrev.com/a49b55b78844557b65a98e7a77dd26078157ed7f
> Cr-Commit-Position: refs/heads/master@{#26685}

TBR=ishell@chromium.org,yangguo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3892

Review URL: https://codereview.chromium.org/946973004

Cr-Commit-Position: refs/heads/master@{#26792}

Revert of [x64] Improve instruction selection for TruncateInt64ToInt32. (patchset #1 id:1 of https://codereview.chromium.org/936323004/)

Reason for revert:
Breaks SQLite

Original issue's description:
> [x64] Improve instruction selection for TruncateInt64ToInt32.
>
> R=svenpanne@chromium.org
>
> Committed: https://crrev.com/64a2717529e2197f3a789adabf86ca36f5eb764c
> Cr-Commit-Position: refs/heads/master@{#26739}

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

Review URL: https://codereview.chromium.org/928723003

Cr-Commit-Position: refs/heads/master@{#26791}

[linux] Use _GLIBCXX_DEBUG in Debug builds by default for better checking.

The _GLIBCXX_DEBUG macro is now set by default for Linux Debug builds
and can be disabled using the disable_glibcxx_debug=1 setting
(compatible with Chrome).  This will help us catch problems earlier.

BUG=v8:3638
LOG=n

Review URL: https://codereview.chromium.org/946283003

Cr-Commit-Position: refs/heads/master@{#26790}

[turbofan] Fix several int vs size_t issues.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/946553002

Cr-Commit-Position: refs/heads/master@{#26789}

Replace is_reference_error bool argument with ParseErrorType enum

This avoids accidental coercion-to-bool when calling ReportMessage()
in the parser (e.g., from pointer types), and as a bonus makes callsites
easier to read.

Review URL: https://codereview.chromium.org/939303002

Cr-Commit-Position: refs/heads/master@{#26788}

Fix issue with -0 in Maps

Because we generated a different hash code for 0 and -0 we ended up
not even getting to the SameValueZero check.

BUG=v8:3906
LOG=N
R=adamk

Review URL: https://codereview.chromium.org/947443005

Cr-Commit-Position: refs/heads/master@{#26787}

ES6: Fix GetIterator

After further spec reading it turns out that we should not do ToObject
on the iterable.

BUG=None
LOG=N
R=adamk

Review URL: https://codereview.chromium.org/941313003

Cr-Commit-Position: refs/heads/master@{#26786}

MIPS: Fix label position types in binding code.

Also some target_at and target_at_put uniformed on mips and mips64.

BUG=

Review URL: https://codereview.chromium.org/942123002

Cr-Commit-Position: refs/heads/master@{#26785}

Change bit pattern of hole nan to reflect different sNan encoding on mips HW.

TEST=
BUG=

Review URL: https://codereview.chromium.org/945813002

Cr-Commit-Position: refs/heads/master@{#26784}

Emit exception handler table in TurboFan.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/943503003

Cr-Commit-Position: refs/heads/master@{#26783}

Constant-fold strings in HGraphBuilder::BuildBinaryOperation.

R=vegorov@chromium.org
BUG=v8:3325
LOG=N

Review URL: https://codereview.chromium.org/935393002

Cr-Commit-Position: refs/heads/master@{#26782}

Only normalize prototypes in OptimizeAsPrototype if it would benefit.

BUG=

Review URL: https://codereview.chromium.org/942833002

Cr-Commit-Position: refs/heads/master@{#26781}

CpuProfiler: move StringsStorage class to separate source and header files.

Mechanical change.

This will break dependency between profiler-generator and heap-profiler-generator.
Later this will help us to reuse SourcePosition in cpu-profiler.

BUG=452067
LOG=n

Review URL: https://codereview.chromium.org/945873002

Cr-Commit-Position: refs/heads/master@{#26780}

Fix GC-unsafe use of BreakLocationIterator.

R=svenpanne@chromium.org
BUG=v8:3776
LOG=N

Review URL: https://codereview.chromium.org/942003002

Cr-Commit-Position: refs/heads/master@{#26779}

Cleanup scheduler unit test a bit.

R=bmeurer@chromium.org
TEST=unittests/SchedulerTest,unittests/SchedulerRPOTest

Review URL: https://codereview.chromium.org/927653004

Cr-Commit-Position: refs/heads/master@{#26778}

Add missing test for CollectControlProjections on calls.

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

Review URL: https://codereview.chromium.org/941993002

Cr-Commit-Position: refs/heads/master@{#26777}

Whitespace change to test new CQ config.

TBR=tandrii@chromium.org,

Review URL: https://codereview.chromium.org/938403002

Cr-Commit-Position: refs/heads/master@{#26776}

CpuProfiler: eliminate cpu-profiler dependency from heap-inl.h

We accessed to cpu_profiler for tracking SharedFunctionInfo objects movements and used their addresses for generating function_id. Actually we could replace the manually generated shared_id by the pair script_id + position. In this case we can drop SharedFunctionInfo events support from cpu_profiler and remove the dependency.

BTW GetCallUid was used as an unique identifier of the function on the front-end side. Actually it is a hash which might not be unique. So I renamed GetCallUid with GetHash and implemented GetFunctionId method.

BUG=452067
LOG=n

Review URL: https://codereview.chromium.org/941973002

Cr-Commit-Position: refs/heads/master@{#26775}

Fix CQ config.

R=tandrii@chromium.org
TBR=tandrii@chromium.org

Review URL: https://codereview.chromium.org/942823003

Cr-Commit-Position: refs/heads/master@{#26774}

[turbofan] Don't compute unneeded gray set in AllNodes.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/940403002

Cr-Commit-Position: refs/heads/master@{#26773}

Immediately "optimize as prototype" when setting as prototype of a function.

This saves space since OptimizeAsPrototype detaches from the transition tree, reclaiming intermediate maps. On gmail this corresponds to roughly 20% of all maps.

BUG=

Review URL: https://codereview.chromium.org/941213005

Cr-Commit-Position: refs/heads/master@{#26772}

Migrate CQ trybot config to v8 repo.

TBR=tandrii@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/940393002

Cr-Commit-Position: refs/heads/master@{#26771}

There are no evacuation candidates and slot buffers when marking is started.

BUG=

Review URL: https://codereview.chromium.org/939163002

Cr-Commit-Position: refs/heads/master@{#26770}

Disable failing debug tests in gc-stress.

TBR=machenbach@chromium.org
BUG=v8:3776
LOG=N

Review URL: https://codereview.chromium.org/944833002

Cr-Commit-Position: refs/heads/master@{#26769}

Simplify computation of environment stack delta.

R=titzer@chromium.org
TEST=cctest/test-run-jsexceptions/CatchCall

Review URL: https://codereview.chromium.org/936343002

Cr-Commit-Position: refs/heads/master@{#26768}

[turbofan] Finally get rid of the generic algorithm.

R=svenpanne@chromium.org

Committed: https://crrev.com/5bbe693e4817011b6a496c638c9f09026fd3dac9
Cr-Commit-Position: refs/heads/master@{#26760}

Review URL: https://codereview.chromium.org/944803002

Cr-Commit-Position: refs/heads/master@{#26767}

Model exceptional edges from call nodes in TurboFan.

R=titzer@chromium.org,bmeurer@chromium.org

Review URL: https://codereview.chromium.org/928213003

Cr-Commit-Position: refs/heads/master@{#26766}

Pass Isolate* more explicitly in Parser, with less reliance on info->isolate().

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/935413003

Cr-Commit-Position: refs/heads/master@{#26765}

Limit size of first page based on serialized data.

R=hpayer@chromium.org
BUG=chromium:453111
LOG=Y

Review URL: https://codereview.chromium.org/932823002

Cr-Commit-Position: refs/heads/master@{#26764}

Revert of [turbofan] Finally get rid of the generic algorithm. (patchset #2 id:20001 of https://codereview.chromium.org/944803002/)

Reason for revert:
Breaks dbg builds.

Original issue's description:
> [turbofan] Finally get rid of the generic algorithm.
>
> R=svenpanne@chromium.org
>
> Committed: https://crrev.com/5bbe693e4817011b6a496c638c9f09026fd3dac9
> Cr-Commit-Position: refs/heads/master@{#26760}

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

Review URL: https://codereview.chromium.org/941963003

Cr-Commit-Position: refs/heads/master@{#26763}

Contribution of PowerPC port (continuation of 422063005) - PPC dir update 2 - mark2

Rebase to latest and use branch created by git new-branch to get a patch that
only has the required changes.  Created new branch, reset to HEAD and then
cherry picked across the changes

modified:   src/compiler/ppc/code-generator-ppc.cc
modified:   src/compiler/ppc/instruction-selector-ppc.cc
modified:   src/disassembler.cc
modified:   src/ic/ppc/handler-compiler-ppc.cc
modified:   src/ic/ppc/ic-compiler-ppc.cc
modified:   src/ppc/assembler-ppc-inl.h
modified:   src/ppc/assembler-ppc.cc
modified:   src/ppc/assembler-ppc.h
modified:   src/ppc/builtins-ppc.cc
modified:   src/ppc/code-stubs-ppc.cc
modified:   src/ppc/deoptimizer-ppc.cc
modified:   src/ppc/disasm-ppc.cc
modified:   src/ppc/full-codegen-ppc.cc
modified:   src/ppc/macro-assembler-ppc.cc
modified:   src/serialize.cc

R=danno@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/935383002

Cr-Commit-Position: refs/heads/master@{#26762}

Add sheriff details to roll commit message.

Add a link with instructions about how to assign v8
issues to the chromium roll commit message.

Remove googler mapping feature as it doesn't apply anymore
to any generalist sheriff.

NOTRY=true

Review URL: https://codereview.chromium.org/938023002

Cr-Commit-Position: refs/heads/master@{#26761}

[turbofan] Finally get rid of the generic algorithm.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/944803002

Cr-Commit-Position: refs/heads/master@{#26760}

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}