Correct clean up in android perf runner.

BUG=chromium:374740
LOG=n
TEST=python -m unittest run_perf_test
NOTRY=true
TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/776223003

Cr-Commit-Position: refs/heads/master@{#25700}

Make cpplint happy.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/783913003

Cr-Commit-Position: refs/heads/master@{#25699}

[turbofan] Improve typing of JSToNumber.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/786703002

Cr-Commit-Position: refs/heads/master@{#25698}

Add myself to OWNERS

Review URL: https://codereview.chromium.org/780323002

Cr-Commit-Position: refs/heads/master@{#25697}

Revert of Optimize add/set/delete operations for string keys in Maps and Sets (patchset #1 id:1 of https://codereview.chromium.org/777663003/)

Reason for revert:
Deopt fuzzer reports that something's still broken, reverting until
I can create a minimal repro.

Original issue's description:
> Optimize add/set/delete operations for string keys in Maps and Sets
>
> This was previously landed in commit 66e2f60, but failed the
> collections mjsunit test with --deopt-every-n=1 due to a typo
> in the shrinking code. This patch corrects and simplifies the
> shrinking logic, and the tests now pass.
>
> R=dslomov@chromium.org
>
> Committed: https://chromium.googlesource.com/v8/v8/+/8599f5f047b4400f7f61de9e449b2246c9aad471

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

Review URL: https://codereview.chromium.org/742353006

Cr-Commit-Position: refs/heads/master@{#25696}

Optimize add/set/delete operations for string keys in Maps and Sets

This was previously landed in commit 66e2f60, but failed the
collections mjsunit test with --deopt-every-n=1 due to a typo
in the shrinking code. This patch corrects and simplifies the
shrinking logic, and the tests now pass.

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/777663003

Cr-Commit-Position: refs/heads/master@{#25695}

Optimize GetPrototype

This introduces Hydrogen for %_GetPrototype. The code falls back on
runtime if the object needs access checks or if its prototype is a
hidden prototype.

BUG=None
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/756423006

Cr-Commit-Position: refs/heads/master@{#25694}

MIPS64: Fix port of Refactor Map::ConstructionCount.

Port 35ff259b6344eed116936372f6861181c6afe922.

BUG=

Review URL: https://codereview.chromium.org/756383005

Cr-Commit-Position: refs/heads/master@{#25693}

MIPS: Refactor Map::ConstructionCount.

Port 35ff259b6344eed116936372f6861181c6afe922

Original commit message:
This combines Map::DoneInobjectSlackTracking and Map::ConstructionCount into one more generic 4-bit counter.

Counter values from 15 down to 8 are used for in-object slack tracking, values from 7 down to 0 are free to be used for a new counter when in-object slack tracking is inactive

BUG=

Review URL: https://codereview.chromium.org/780303003

Cr-Commit-Position: refs/heads/master@{#25692}

GN: Enable embedder to decide whether or not the external V8 snapshot is enabled.

BUG=421063

Review URL: https://codereview.chromium.org/749213004

Cr-Commit-Position: refs/heads/master@{#25691}

Make sure that individual shipping features can be disabled.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/779203005

Cr-Commit-Position: refs/heads/master@{#25690}

Refactor Map::ConstructionCount.

This combines Map::DoneInobjectSlackTracking and Map::ConstructionCount into one more generic 4-bit counter.

Counter values from 15 down to 8 are used for in-object slack tracking, values from 7 down to 0 are free to be used for a new counter when in-object slack tracking is inactive.

Review URL: https://codereview.chromium.org/767253002

Cr-Commit-Position: refs/heads/master@{#25689}

new api for adding indexed interceptors

R=svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/765883003

Cr-Commit-Position: refs/heads/master@{#25688}

Fix %GetWeakSetValues to work correctly with GC.

This fixes mjsunit/es6/mirror-collections failure in arm64 gc-stress bot.

BUG=

Review URL: https://codereview.chromium.org/783673002

Cr-Commit-Position: refs/heads/master@{#25687}

Allow eval in detached contexts

BUG=

Review URL: https://codereview.chromium.org/781953002

Cr-Commit-Position: refs/heads/master@{#25686}

[turbofan] disable neutering on embedded arraybuffers

R=titzer@chromium.org,

BUG=

Review URL: https://codereview.chromium.org/781933002

Cr-Commit-Position: refs/heads/master@{#25685}

Fix the order of context binding/simulate insertion for BlockContexts.

R=jarin@chromium.org
BUG=v8:3741
LOG=N

Review URL: https://codereview.chromium.org/762393008

Cr-Commit-Position: refs/heads/master@{#25684}

[turbofan] Fix Corrections tankage on x64.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/771073003

Cr-Commit-Position: refs/heads/master@{#25683}

Switch two ZoneLists to ZoneVector in register allocator.

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/778093003

Cr-Commit-Position: refs/heads/master@{#25682}

Reland "Encode reservation meta data in the snapshot blob."

CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_dbg,v8_linux_nosnap_rel

Review URL: https://codereview.chromium.org/781943002

Cr-Commit-Position: refs/heads/master@{#25681}

Cleanup deoptimizer relocation slot preparation.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/782703002

Cr-Commit-Position: refs/heads/master@{#25680}

When generating code for ia32, make sure that there is enough reloc space

Compare with LCodeGen::FinishCode

BUG=none
R=jarin@chromium.org,mstarzinger@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/777243002

Cr-Commit-Position: refs/heads/master@{#25679}

Finally drop outdated misleading runtime.js comment.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/765833004

Cr-Commit-Position: refs/heads/master@{#25678}

[turbofan] Use "leal" in even more situations

Achieve more than parity with modes currently handled on ia32 in preparation for
porting the entire mechanism to ia32, including supporting mul of constants 3,
5 and 9 with "leal" instructions.

TEST=unittests

Review URL: https://codereview.chromium.org/774193003

Cr-Commit-Position: refs/heads/master@{#25677}

[x86] Slow case of TruncateDoubleToI shouldn't be inline.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/778113002

Cr-Commit-Position: refs/heads/master@{#25676}

Teach the test runner whether it's running on a trybot or not

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

Review URL: https://codereview.chromium.org/781763002

Cr-Commit-Position: refs/heads/master@{#25675}

Use merged JSTest config for performance tests.

The new config is now used for perf measurements. The old
ones are deleted to avoid redundancy.

This also ports https://codereview.chromium.org/754523004 to the new config file.

BUG=chromium:374740
LOG=n
TBR=ulan@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/782673003

Cr-Commit-Position: refs/heads/master@{#25674}

[turbofan] Redundant load elimination.

This is an initial version of redundant load elimination, currently
limited to LoadField operators, and implemented by walking the effect
chain.

TEST=unittests
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/782473002

Cr-Commit-Position: refs/heads/master@{#25673}

Update V8 DEPS.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/777373002

Cr-Commit-Position: refs/heads/master@{#25672}

MIPS: Fixed environment handling for LFlooringDivI.

Port c16b8f6cbbe295abf3fab2f6b9f4a4632db4cf6b

TEST=mjsunit/regress/regress-437765
BUG=

Review URL: https://codereview.chromium.org/750213003

Cr-Commit-Position: refs/heads/master@{#25671}

Revert of Optimize add/set/delete operations for string keys in Maps and Sets (patchset #5 id:70001 of https://codereview.chromium.org/773993002/)

Reason for revert:
Caused test failures in mjsunit/es6/collections with --deopt-every-n-times=1

Original issue's description:
> Optimize add/set/delete operations for string keys in Maps and Sets

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

Review URL: https://codereview.chromium.org/777233003

Cr-Commit-Position: refs/heads/master@{#25670}

Add js-perf-test for ES6 class default constructor

BUG=v8:3330
LOG=N
TBR=dslomov@chromium.org

Review URL: https://codereview.chromium.org/754523004

Cr-Commit-Position: refs/heads/master@{#25669}

Optimize add/set/delete operations for string keys in Maps and Sets

Review URL: https://codereview.chromium.org/773993002

Cr-Commit-Position: refs/heads/master@{#25668}

Make template scan related function take a template<bool> parameter

This is for performance. Having to do the test in every Advance was too
expensive.

BUG=438991, v8:3230
LOG=N
R=dslomov@chromium.org, marja

Review URL: https://codereview.chromium.org/766193003

Cr-Commit-Position: refs/heads/master@{#25667}

Cleanup: Remove NativesCollection<.>::*Raw* methods.

These methods for used for compressed libraries, where GetSource* functions
contained the compressed sources and [GS]etRawSource* the uncompressed
sources. This is dead code since the API no longer supports compression.

(If you need/want compressed sources, use the external startup data and
 compress/uncompress on the Embedder's side.)

BUG=

Review URL: https://codereview.chromium.org/772853003

Cr-Commit-Position: refs/heads/master@{#25666}

Optimize testing for an index's existence in packed Arrays

This patch introduces a new inline runtime function,
%_HasFastPackedElements(), and uses it both in the implementation
of the 'in' operator and in the array builtins to speed
up testing for the existence of an index in an array.

In testing with the microbenchmark on the attached bug,
for example, the runtime goes from 326ms to 66ms.

A reviewer might ask whether the HAS_INDEX macro is worthwhile,
and I tried the same example without it, which pushed the
microbenchmark up to 157ms. So it seems it's worth it to
avoid the function call to IN() if we know we're dealing
with arrays and numbers.

BUG=v8:3701
LOG=n

Review URL: https://codereview.chromium.org/754863002

Cr-Commit-Position: refs/heads/master@{#25665}

MIPS; Improve checked load/store operators for constant offset and length.

TEST=
BUG=
R=balazs.kilvady@imgtec.com, paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/782493002

Cr-Commit-Position: refs/heads/master@{#25664}

Explicitly track whether incremental marking was activated

In the gc-tracer, we check whether we're marking to figure out which
part of the mark compact we're in. If we aborted incremental marking for
whatever reason, the check fails and we might later run into trouble

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

Review URL: https://codereview.chromium.org/783453003

Cr-Commit-Position: refs/heads/master@{#25663}

MIPS: Change CmpWeakValue to a more MIPS like GetWeakValue.

This approach saves one instruction by eliminating the use of Subu as a
pseudo-comparison.

BUG=

Review URL: https://codereview.chromium.org/779793004

Cr-Commit-Position: refs/heads/master@{#25662}

ES6 template literals: Fix issue with template after rbrace

If we hade }` the right brace was always treated as part of the
template literal. We should only treat the right brace as part of
the literal when we continue to parse the template literal after a
placeholder.

BUG=v8:3734
LOG=Y

Review URL: https://codereview.chromium.org/778813003

Cr-Commit-Position: refs/heads/master@{#25661}

Check whether the marking deque overflowed in ProcessEphemeralMarking

Otherwise, we might exit to early when we call ProcessEphemeralMarking
with an empty, overflown deque

BUG=none
R=hpayer@chromium.org,erik.corry@gmail.com
LOG=n

Review URL: https://codereview.chromium.org/777643002

Cr-Commit-Position: refs/heads/master@{#25660}

Stage ES6 template literals

BUG=v8:3230
LOG=Y
R=dslomov@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/780603003

Cr-Commit-Position: refs/heads/master@{#25659}

[turbofan] Narrow upper bounds during typed lowering.

This is a temporary solution, which optionally narrows upper bounds of
nodes when changing the operator of a node.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/741503006

Cr-Commit-Position: refs/heads/master@{#25658}

Do not embed function in DirectLoadGlobalFunctionPrototype.

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/778673002

Cr-Commit-Position: refs/heads/master@{#25657}

[turbofan] Reduce context accesses during typed lowering.

TEST=unittests
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/776243002

Cr-Commit-Position: refs/heads/master@{#25656}

Make JSTests ready for Android measurements.

This adds a common perf configuration for JSTests including
Classes, Collections, Iterators and Strings. This allows
the android test runner to handle subdirectories correctly
and to share the base.js resource in the parent directory.

The new json config has added resources configs for the
Android runner.

The perf runner's relative paths on the device are fixed as
well. Resources are only pushed on the configuration node
where they are specified. They are pushed to a dir on the
device that follows the same directory structure as on the
host. The binary is executed in the benchmark folder on the
device like on the host to allow relative path file
loading.

BUG=chromium:374740
LOG=n
TEST=python -m unittest run_perf_test
TBR=ulan@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/779923002

Cr-Commit-Position: refs/heads/master@{#25655}

Revert of Encode reservation meta data in the snapshot blob. (patchset #3 id:40001 of https://codereview.chromium.org/781443002/)

Reason for revert:
[sheriff] Breaks http://build.chromium.org/p/client.v8/builders/V8-Blink%20Linux%2064/builds/1540

Original issue's description:
> Encode reservation meta data in the snapshot blob.
>
> This also makes reserving multiple chunks per object space possible.
>
> R=vogelheim@chromium.org

TBR=vogelheim@chromium.org,baixo@chromium.org,yangguo@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/780833002

Cr-Commit-Position: refs/heads/master@{#25654}

[x64] check sahf correctly

BUG=

Review URL: https://codereview.chromium.org/777173002

Cr-Commit-Position: refs/heads/master@{#25653}

Encode reservation meta data in the snapshot blob.

This also makes reserving multiple chunks per object space possible.

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/781443002

Cr-Commit-Position: refs/heads/master@{#25652}

Fix path construction in perf runner.

BUG=chromium:374740
LOG=n
TEST=python -m unittest run_perf_test
TBR=ulan@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/776873005

Cr-Commit-Position: refs/heads/master@{#25651}

Fix Promise.resolve/Promise.reject unnecessarily scheduling a microtask.

R=rossberg@chromium.org, yangguo@chromium.org, adamk@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/777703002

Cr-Commit-Position: refs/heads/master@{#25650}

X87: Use weak cells to embed maps in store handler.

port 3fc9c9b665baaa434c672efcbff632a2eae86f56

original commit message:

  Use weak cells to embed maps in store handler.
  BUG=v8:3629
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/779843002

Cr-Commit-Position: refs/heads/master@{#25649}

X87: CheckPrototypes uses weak cells to embed maps.

port 062a032f50291ce181462226ff41b4ef9b11deba

original commit message:

  CheckPrototypes uses weak cells to embed maps.

BUG=

Review URL: https://codereview.chromium.org/761093004

Cr-Commit-Position: refs/heads/master@{#25648}

MIPS: Use weak cells to embed maps in store handler.

Port 3fc9c9b665baaa434c672efcbff632a2eae86f56

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/762483004

Cr-Commit-Position: refs/heads/master@{#25647}

Reland "[turbofan] Reuse forward fixpoint algorithm in Typer by making it a Reducer."

This reverts commit 918ef9d712ab77bc33ffb8eb985a6fd5672602f6.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/780623002

Cr-Commit-Position: refs/heads/master@{#25646}

MIPS: CheckPrototypes uses weak cells to embed maps.

Port 062a032f50291ce181462226ff41b4ef9b11deba

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/777673002

Cr-Commit-Position: refs/heads/master@{#25645}

Optimize pushing files in android perf test runner.

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

Review URL: https://codereview.chromium.org/754463005

Cr-Commit-Position: refs/heads/master@{#25644}

Revert "[turbofan] Reuse forward fixpoint algorithm in Typer by making it a Reducer."

This reverts commit a48ad24a7c258d95acf3a6ae126036953a9122dd.

BUG=

Review URL: https://codereview.chromium.org/763773004

Cr-Commit-Position: refs/heads/master@{#25643}

Move more don't-crankshaft computation to numbering pass

The "do I inline?" decision needs many of the same inputs as the "should
I even try to crankshaft?" decision.  This change consolidates these
checks in the numbering pass.  It also removes the is_generator() check,
as that's already handled when visiting the initial Yield expression.

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/775693003

Cr-Commit-Position: refs/heads/master@{#25642}

MIPS64: [turbofan] Add checked load/store operators.

Port c516d4f09408879602520748333754d3866224fb

BUG=

Review URL: https://codereview.chromium.org/773113005

Cr-Commit-Position: refs/heads/master@{#25641}

Simplify template literal raw string creation

BUG=v8:3710
LOG=Y
R=dslomov@chromium.org, marja@chromium.org

Review URL: https://codereview.chromium.org/768203002

Cr-Commit-Position: refs/heads/master@{#25640}

Use weak cells to embed maps in store handler.

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/774473004

Cr-Commit-Position: refs/heads/master@{#25639}

Prevent redundant node revisit in ControlEquivalence.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/773133003

Cr-Commit-Position: refs/heads/master@{#25638}

Restart idle round on context disposal.

BUG=

Review URL: https://codereview.chromium.org/754363008

Cr-Commit-Position: refs/heads/master@{#25637}

MIPS: Improve pushing arguments on stack.

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

Review URL: https://codereview.chromium.org/769283002

Cr-Commit-Position: refs/heads/master@{#25636}

MIPS: Fix ambiguous double constant loading after adding checked load/store operators.

The V8_INFINITY macro expands to constant expression of type float.

TEST=mjsunit/constant-folding-2
BUG=
R=balazs.kilvady@imgtec.com

Review URL: https://codereview.chromium.org/779433003

Cr-Commit-Position: refs/heads/master@{#25635}

CheckPrototypes uses weak cells to embed maps.

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/770373002

Cr-Commit-Position: refs/heads/master@{#25634}

[turbofan] Reuse forward fixpoint algorithm in Typer by making it a Reducer.

R=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/769303002

Cr-Commit-Position: refs/heads/master@{#25633}

[turbofan] Initial work on cleaning up the Node class.

- Remove use_count_, only used for debug builds and tests.
- Use BitField instead of the unreliable C++ bit fields.
- Improve memory layout.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/780503002

Cr-Commit-Position: refs/heads/master@{#25632}

Print finalize incremental marking event in idle notification.

BUG=

Review URL: https://codereview.chromium.org/775013002

Cr-Commit-Position: refs/heads/master@{#25631}

Slow down incremental marking on main thread when idle notification is active.

BUG=

Review URL: https://codereview.chromium.org/771703004

Cr-Commit-Position: refs/heads/master@{#25630}

Serializer: cache recent back references for shorter encoding.

And some refactorings.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/766893002

Cr-Commit-Position: refs/heads/master@{#25629}

Make test-parsing faster: don't run parsing tests with all experimental flag combinations.

Instead, make it possible for indifidual tests to pass "always true flags" which
are not part of the varying flag set.

The downside is that if an experimental flag changes parsing of some of the
unrelated code snippets, it's noticed later (only after the flag is turned on by
default). But this is a reasonable trade off for faster tests.

Additional fix: Some tests (ErrorsFutureStrictReservedWords) were using
always_flags incorrectly (running two different tests with different
always_flags basically iterates over every flag combination anyway - most of
them twice).

BUG=v8:3707
LOG=N

Review URL: https://codereview.chromium.org/772823002

Cr-Commit-Position: refs/heads/master@{#25628}

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

- (y << L + x) & (-1 << L) => (x & (-1 << L)) + y << L
- (x + y << L) & (-1 << L) => (x & (-1 << L)) + y << L

TEST=unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/758603003

Cr-Commit-Position: refs/heads/master@{#25627}

MIPS: [turbofan] Add checked load/store operators.

Port c516d4f09408879602520748333754d3866224fb

Partial port to un-break the build. There are a few failing
tests, and the code is suboptimal for smaller offsets.

Fixes and mips64 port will come in another CL.

BUG=

Review URL: https://codereview.chromium.org/762853004

Cr-Commit-Position: refs/heads/master@{#25626}

Optimize non-mutation Map and Set operations for String keys

Review URL: https://codereview.chromium.org/757143002

Cr-Commit-Position: refs/heads/master@{#25625}

Fix NativesCollection<.>::GetScriptName in natives-external.cc

As there's no associated bug, here's the issue:
- Some ES6 functionality in Chrome is presently broken; this fixes it.
- The natives (built-in libraries) can be accessed by their 'name'.
  This is used to active ES6 flags.
- Strangely enough, there's an id and a name, where the name is derived
  from the id as "native %s.js", with %s for the id.
- NativesCollection<.>::GetScriptName uses the name.
- NativesCollection<.>::GetIndex uses the id.
- Example:
  NativesCollection<EXPERIMENTAL>::GetIndex("harmony-string") -> 3
  NativesCollection<EXPERIMENTAL>::GetScriptName(3) -> "native harmony-string.js"
- Nobody knows why; it's quite mysterious.
- When introducing the "external startup data", I didn't fully understand this
  and used the id in both places.
- When the "external startup data" was turned on in Chrome, ES6 features broke
  in Chrome since the libraries could no longer be found.
- This CL fixes this and makes the external startup data behave just like the
  built-in version.

R=dslomov
BUG=

Review URL: https://codereview.chromium.org/774613003

Cr-Commit-Position: refs/heads/master@{#25624}

[turbofan] Enable DivIsSafe flag for arm64.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/773803003

Cr-Commit-Position: refs/heads/master@{#25623}

Switch CFGBuilder to use NodeMarker.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/753063004

Cr-Commit-Position: refs/heads/master@{#25622}

Restrict floating control to minimal control-connected component.

R=jarin@chromium.org
TEST=cctest/test-scheduler/NestedFloatingDiamondWithChain

Review URL: https://codereview.chromium.org/738613005

Cr-Commit-Position: refs/heads/master@{#25621}

Make generic algorithm a little less generic.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/760493003

Cr-Commit-Position: refs/heads/master@{#25620}

[ia32] Introduce FMA3 instructions on scalar data elements.

port 83a635e0d70f144300ea83be0d7effc1eb1bf6ef

BUG=

Review URL: https://codereview.chromium.org/773783002

Cr-Commit-Position: refs/heads/master@{#25619}

Trace how long it takes to compute the weak closure during mark-compact

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

Review URL: https://codereview.chromium.org/769253002

Cr-Commit-Position: refs/heads/master@{#25618}

Stage ES6 classes and object literal extensions.

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

Review URL: https://codereview.chromium.org/774653002

Cr-Commit-Position: refs/heads/master@{#25617}

Clean up node iteration

- Create a first-class Edge type.
- Separate node and edge iterators
- Make iterators only responsible for iteration
- Make it possible to modify the use edge iterator while iterating.
- Add the ability to update inputs to Edges directly.

Review URL: https://codereview.chromium.org/765983002

Cr-Commit-Position: refs/heads/master@{#25616}

Reland parts of 'Use weak cells in map checks in polymorphic ICs'

This relands macroassembler instructions and weak cell caching and
does not include parts that caused "Linux ASan LSan" test failures.

BUG=v8:3663
LOG=N

Review URL: https://codereview.chromium.org/764003003

Cr-Commit-Position: refs/heads/master@{#25615}

Add Android platform to performance runner.

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

Review URL: https://codereview.chromium.org/768143002

Cr-Commit-Position: refs/heads/master@{#25614}

Fixed environment handling for LFlooringDivI on ARM.

Beautiful code... :-}

BUG=chromium:437765
LOG=y

Review URL: https://codereview.chromium.org/775613002

Cr-Commit-Position: refs/heads/master@{#25613}

Make the ParserSync test faster (and re-enable it).

Most of the run time came from testing with all possible flag combinations. None
of the flags passed affect the test, and there are specialized tests for testing
the features behind the flags; no need to slow down the generic test.

With these changes, run time for debug build goes from 186 s to 0.5 s.

In addition, fixed some missing commas between the test cases.

R=svenpanne@chromium.org
BUG=v8:3707
LOG=N

Review URL: https://codereview.chromium.org/766673003

Cr-Commit-Position: refs/heads/master@{#25612}

[turbofan] Use the temporary zone for the VN cache.

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/760403003

Cr-Commit-Position: refs/heads/master@{#25611}

[turbofan] Cache the Branch operator(s).

TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/771153002

Cr-Commit-Position: refs/heads/master@{#25610}

[turbofan] Cache the JSStoreProperty operator(s).

TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/769193003

Cr-Commit-Position: refs/heads/master@{#25609}

Restore correct logic in GC test.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/767453004

Cr-Commit-Position: refs/heads/master@{#25608}

Perform smaller marking steps incrementally in idle notification.

BUG=

Review URL: https://codereview.chromium.org/767233003

Cr-Commit-Position: refs/heads/master@{#25607}

After moving unreachable weak global handles only process harmony collections

Groups and implicit references are no longer relevant at this point.

Also add tests that fail if the first or second round of ephemeral
marking is omitted

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

Review URL: https://codereview.chromium.org/761343004

Cr-Commit-Position: refs/heads/master@{#25606}

[turbofan] Add missing tests for SimplifiedOperatorBuilder.

TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/772723003

Cr-Commit-Position: refs/heads/master@{#25605}

[turbofan] Enable stage 1.

R=danno@chromium.org,bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/770203003

Cr-Commit-Position: refs/heads/master@{#25604}

ES6 unicode extensions, part 1.

Allows \u{xxxxx} in variable names and string literals (not yet in regexps).

Everything's behind the --harmony-unicode flag.

BUG=

Review URL: https://codereview.chromium.org/716423002

Cr-Commit-Position: refs/heads/master@{#25603}

[turbofan] Initialize less frequently used types in typer.cc lazily.

R=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/771683002

Cr-Commit-Position: refs/heads/master@{#25602}

Parser: Removing debug code.

The mystery crash never reappeared once the debugging code was in place.

R=jochen@chromium.org
BUG=

Review URL: https://codereview.chromium.org/760863003

Cr-Commit-Position: refs/heads/master@{#25601}