port 09626525 (r30957).

original commit message:

BUG=

Review URL: https://codereview.chromium.org/1370283003

Cr-Commit-Position: refs/heads/master@{#30988}

Drive-by: remove unnecessary includes.

Review URL: https://codereview.chromium.org/1356223004

Cr-Commit-Position: refs/heads/master@{#30987}

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1374613002

Cr-Commit-Position: refs/heads/master@{#30986}

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1372063002

Cr-Commit-Position: refs/heads/master@{#30985}

BUG=

Review URL: https://codereview.chromium.org/1370123002

Cr-Commit-Position: refs/heads/master@{#30984}

The comparison operators and ToBoolean are implemented by calling into
the runtime. There are new runtime methods are prefixed with Interpreter
to make use case clear.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1369123002

Cr-Commit-Position: refs/heads/master@{#30983}

Revert of Introduce a V8_NORETURN macro and use it to make GCC 4.9.2 happy again. (patchset #3 id:80001 of https://codereview.chromium.org/1361763004/ )

Reason for revert:
This CL breaks cross-compiling to arm.

Original issue's description:
> Introduce a V8_NORETURN macro and use it to make GCC 4.9.2 happy again.
>
> Without that, it has a few false positives about out-of-bounds array accesses.
> Also makes the clang static-analyzer happy.
>
> Original code review from Sven Panne:
> https://codereview.chromium.org/790723002/
>
> Committed: https://crrev.com/0b48b2a8ebfc791a36f4ec1f299f46db76265a3a
> Cr-Commit-Position: refs/heads/master@{#30977}

TBR=jochen@chromium.org,bmeurer@chromium.org,jkummerow@chromium.org,karl@skomski.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1370203002

Cr-Commit-Position: refs/heads/master@{#30982}

The main changes are:
- Fix treatment of loops, which was incorrect and sometimes resulted in
  the wrong completion value.
- Get rid of unnecessary variables.

This is in preparation of implementing ES6 completion semantics.

R=rossberg
BUG=

Review URL: https://codereview.chromium.org/1362333002

Cr-Commit-Position: refs/heads/master@{#30981}

NOTRY=true

Review URL: https://codereview.chromium.org/1371913006

Cr-Commit-Position: refs/heads/master@{#30980}

BUG=v8:2899
LOG=N
R=

Review URL: https://codereview.chromium.org/1364583004

Cr-Commit-Position: refs/heads/master@{#30979}

Review URL: https://codereview.chromium.org/1369913002

Cr-Commit-Position: refs/heads/master@{#30978}

Without that, it has a few false positives about out-of-bounds array accesses.
Also makes the clang static-analyzer happy.

Original code review from Sven Panne:
https://codereview.chromium.org/790723002/

Review URL: https://codereview.chromium.org/1361763004

Cr-Commit-Position: refs/heads/master@{#30977}

This was copied into test262.

BUG=v8:4254
NOTRY=true
LOG=n

Review URL: https://codereview.chromium.org/1368313002

Cr-Commit-Position: refs/heads/master@{#30976}

Replacing it with SMI_ACCESSORS.
This change makes accesses to Smi fields in objects more regular (the
accessors now always consume/return an int rather than a Smi*), which
avoids a bunch of manual Smi::FromInt() and Smi::value() conversions,
and is a step on the way towards being able to generate objects-inl.h.

Review URL: https://codereview.chromium.org/1371893002

Cr-Commit-Position: refs/heads/master@{#30975}

Review URL: https://codereview.chromium.org/1372003002

Cr-Commit-Position: refs/heads/master@{#30974}

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1371943002

Cr-Commit-Position: refs/heads/master@{#30973}

NOTE: You will have to land this as I don’t have write perms to this repo.

BUG=none
R=hablich@chromium.org

Review URL: https://codereview.chromium.org/1347153006

Cr-Commit-Position: refs/heads/master@{#30972}

This is a second step towards merging FeedbackVectorSlot and FeedbackVectorICSlot.

Review URL: https://codereview.chromium.org/1376443002

Cr-Commit-Position: refs/heads/master@{#30971}

R=rossberg
BUG=

Review URL: https://codereview.chromium.org/1371963002

Cr-Commit-Position: refs/heads/master@{#30970}

BUG=

Review URL: https://codereview.chromium.org/1371033002

Cr-Commit-Position: refs/heads/master@{#30969}

This should fix a weird random crash we keep seeing on Linux nosnap
bot with TurboFan enabled.

BUG=v8:4435,v8:4423
LOG=n
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1374663002

Cr-Commit-Position: refs/heads/master@{#30968}

This should fix the Threading1 flakiness that we see on the waterfall.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1369993002

Cr-Commit-Position: refs/heads/master@{#30967}

Review URL: https://codereview.chromium.org/1367123003

Cr-Commit-Position: refs/heads/master@{#30966}

This is a trivial spinoff of the more complicated CL splitting up memory:
  https://codereview.chromium.org/1365743003/

- Parallel compaction is still off.
- We now compute the number of parallel compaction tasks, depending on the
  evacuation candidate list, the number of cores, and some hard limit.

BUG=chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1371923002

Cr-Commit-Position: refs/heads/master@{#30965}

This is a first step towards merging FeedbackVectorSlot and FeedbackVectorICSlot.

Review URL: https://codereview.chromium.org/1369973002

Cr-Commit-Position: refs/heads/master@{#30964}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1365803004

Cr-Commit-Position: refs/heads/master@{#30963}

Review URL: https://codereview.chromium.org/1367423002

Cr-Commit-Position: refs/heads/master@{#30962}

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1366183003

Cr-Commit-Position: refs/heads/master@{#30961}

Fails since test262-es6 is tested without i18n support.

BUG=v8:4437
LOG=n
NOTRY=true
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1368293002

Cr-Commit-Position: refs/heads/master@{#30960}

The change https://codereview.chromium.org/1274453002 is causing a breakage
on the Chrome OS builds. It is not clear how to easily revert because there is
a following on dependent change (https://codereview.chromium.org/1351983002) am
I am not too familiar with the revert process.

The simplest revert is to remove the DCHECK.

BUG=chromium:536163
LOG=n
NOTRY=true
R=machenbach@chromium.org, cmumford@chromium.org, hpayer@chromium.org

Review URL: https://codereview.chromium.org/1372693002 .

Cr-Commit-Position: refs/heads/master@{#30959}

Review URL: https://codereview.chromium.org/1361893006

Cr-Commit-Position: refs/heads/master@{#30958}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1365503005

Cr-Commit-Position: refs/heads/master@{#30957}

The internal ConvertToString helper was using the wrong ToPrimitive,
actually the old ES5 like DefaultString, and it also prematurely
optimized for no real benefit.

BUG=v8:4307
LOG=n

Review URL: https://codereview.chromium.org/1370943002

Cr-Commit-Position: refs/heads/master@{#30956}

Also support %_ToString in Crankshaft utilizing the ToStringStub, which
is also used in TurboFan and fullcodegen. This is necessary to repair a
regression on Octane that was introduced when switching from the hand
crafted NonStringToString/ToString magic to %_ToString (which properly
supports @@toPrimitive).

BUG=chromium:535953,v8:4307
LOG=n

Review URL: https://codereview.chromium.org/1373743002

Cr-Commit-Position: refs/heads/master@{#30955}

port c90c60ba (r30940)

original commit message:

    Make sure to always reference it indirectly. This allows us to make the vector
    native-context dependent should we wish.

BUG=

Review URL: https://codereview.chromium.org/1369963002

Cr-Commit-Position: refs/heads/master@{#30954}

Rolling v8/buildtools to 8d89c1b15f80323b54b3305b2be7b26686fd5611

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review URL: https://codereview.chromium.org/1368213002

Cr-Commit-Position: refs/heads/master@{#30953}

Fails since test262-es6 is tested without i18n support.

BUG=v8:4437
LOG=n
NOTRY=true
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1369113002

Cr-Commit-Position: refs/heads/master@{#30952}

Rolling v8/third_party/icu to 423fc7e1107fb08ccf007c4aeb76dcab8b2747c1

Rolling v8/tools/clang to 290301c180118e27755bfced176ff61bd0acb1b8

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review URL: https://codereview.chromium.org/1373683002

Cr-Commit-Position: refs/heads/master@{#30951}

Revert of JSObject::GetEnumProperty cleanup (patchset #2 id:20001 of https://codereview.chromium.org/1363293002/ )

Reason for revert:
Reverting, because of broken GC stress bots.

@cbruni: Sorry for the revert. I'm not entirely sure it's actually your CL; but policy is to revert speculatively if we can't determine an exact cause.

Original issue's description:
> JSObject::GetEnumProperty cleanup
>
> BUG=
>
> Committed: https://crrev.com/a00d47c802f93cf9835eafce4c9da2dd10b44f6a
> Cr-Commit-Position: refs/heads/master@{#30946}

TBR=jkummerow@chromium.org,cbruni@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1371673004

Cr-Commit-Position: refs/heads/master@{#30950}

BUG=

Review URL: https://codereview.chromium.org/1372623002

Cr-Commit-Position: refs/heads/master@{#30949}