When |ResolvePromise| is resolved with a promise that is
already fulfilled or resolved, we can short circuit the
promise resolution procedure by directly looking up the
result from the promise. We save creating two closures, enqueuing in
the promise queue, and running through PromiseThen.

This patch uses IsPromise to check if the |resolution| object is a native
promise and also checks if |resolution.then| hasn't been monkey
patched.

This patch adds some redundant code from PromiseThen like setting
the promiseHasHandlerSymbol and calling PromiseRevokeReject call,
which would've been taken care of by PromiseThen in the old code path.

This patch results in a 13.8% improvement(over 5 runs) in the bluebird
benchmarks.

BUG=v8:5046

Review-Url: https://codereview.chromium.org/2028253004
Cr-Commit-Position: refs/heads/master@{#36765}

Revert of [stubs] Enable TurboFan LoadIC dispatcher stub. (patchset #1 id:1 of https://codereview.chromium.org/2033943005/ )

Reason for revert:
Fails cctest consistently on Linux nosnap debug:

https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/7185
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/7186
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/7187

Original issue's description:
> [stubs] Enable TurboFan LoadIC dispatcher stub.
>
> Committed: https://crrev.com/46a9322e88de037598cfd1090285375d97b11db2
> Cr-Commit-Position: refs/heads/master@{#36760}

TBR=verwaest@chromium.org,ishell@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2042873002
Cr-Commit-Position: refs/heads/master@{#36764}

As a first step I uncommit the memory on the main thread. Also to measure impact and stability of that optimization. In a follow-up CL, the uncommitting should be moved on the concurrent thread.

BUG=

Review-Url: https://codereview.chromium.org/2032393002
Cr-Commit-Position: refs/heads/master@{#36763}

We should use both the int value as well as the reloc info mode for the
key of a relocatable int{32|64}.

BUG=

Review-Url: https://codereview.chromium.org/2039023002
Cr-Commit-Position: refs/heads/master@{#36762}

This cl sketches an api for incremental wrapper tracing, but still uses the api
in the stop-the-world fashion. Responsibility to maintain a marking deque is
transfered to the embedder. V8 will still collect wrapper internal fields, but
will send them to the embedder after each incremental gc task. Wrappers must be
sent at latest by the time next oilpan gc runs - so blink can keep all
discovered wrappables alive.

The old api will be cleared after this cl and corresponding blink cl land.

Comments are very welcomed :)

LOG=no
BUG=468240

Review-Url: https://codereview.chromium.org/2032213003
Cr-Commit-Position: refs/heads/master@{#36761}

Review-Url: https://codereview.chromium.org/2033943005
Cr-Commit-Position: refs/heads/master@{#36760}

Port 8d90210a

BUG=

Review-Url: https://codereview.chromium.org/2045553002
Cr-Commit-Position: refs/heads/master@{#36759}

Revert of Provide a tagged allocation top pointer. (patchset #5 id:80001 of https://codereview.chromium.org/2028633002/ )

Reason for revert:
d8 segfaults on some benchmarks on ia32. Investigating.

Original issue's description:
> Provide a tagged allocation top pointer.
>
> Taking over http://crrev.com/1924223002.
>
> BUG=chromium:606711
> LOG=N
>
> Committed: https://crrev.com/f42c9e93c80fdf57e8f92bb87f6ed927d0ae4028
> Committed: https://crrev.com/c99caf307ba3bb1b1cf08bf4172f503754c41341
> Cr-Original-Commit-Position: refs/heads/master@{#36633}
> Cr-Commit-Position: refs/heads/master@{#36742}

TBR=bmeurer@chromium.org,hpayer@chromium.org,machenbach@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:606711

Review-Url: https://codereview.chromium.org/2035413003
Cr-Commit-Position: refs/heads/master@{#36758}

Prior to this change, both 0 and 1 as RNG seed would result in the same
internal state. state0 and state1 cannot both be zero, but murmur hash
maps 0 back to 0.

R=cbruni@chromium.org
BUG=v8:5069

Review-Url: https://codereview.chromium.org/2040953002
Cr-Commit-Position: refs/heads/master@{#36757}

Improve CheckedLoad and Store bounds checking for arrays with power of two
length.

BUG=

Review-Url: https://codereview.chromium.org/2043663002
Cr-Commit-Position: refs/heads/master@{#36756}

R=rossberg,adamk
BUG=chromium:616386

Review-Url: https://codereview.chromium.org/2042793002
Cr-Commit-Position: refs/heads/master@{#36755}

[stubs] Introducing LoadICTFStub and LoadICTrampolineTFStub and a switch to enable them instead of respective platform stubs.

The stubs do not increase respective counters as they are in the snapshot and --native-code-counters is off during snapshot creation anyway.

Review-Url: https://codereview.chromium.org/2031753003
Cr-Commit-Position: refs/heads/master@{#36754}

This switches a few underscores to dashes to match the infra-
side definitions.

BUG=chromium:474921
TBR=vogelheim@chromium.org, jochen@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2045543002
Cr-Commit-Position: refs/heads/master@{#36753}

This allows the header in question to be included without including any
other header files. This is step towards factory.h being self-contained.

R=clemensh@chromium.org

Review-Url: https://codereview.chromium.org/2043723002
Cr-Commit-Position: refs/heads/master@{#36752}

Since the generic GetCallingContext is deprecated, but there's still the
use case for the debugger to get the currently debugged context while in
the debug context, add a convenience API for it.

Note that EventDetails already exposes this context, but the embedder
might not necessarily have the EventDetails around.

R=verwaest@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2040853003
Cr-Commit-Position: refs/heads/master@{#36751}

Port 8d90210a

R=yangguo@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:4483
LOG=N

Review-Url: https://codereview.chromium.org/2040803003
Cr-Commit-Position: refs/heads/master@{#36750}

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com, bjaideep@ca.ibm.com

BUG=

Review-Url: https://codereview.chromium.org/2043553002
Cr-Commit-Position: refs/heads/master@{#36749}

R=ahaas@chromium.org,aseemgarg@chromium.org,bradnelson@chromium.org
BUG=chromium:617525

Review-Url: https://codereview.chromium.org/2040983002
Cr-Commit-Position: refs/heads/master@{#36748}

BUG=chromium:617529

Review-Url: https://codereview.chromium.org/2041843002
Cr-Commit-Position: refs/heads/master@{#36747}

This makes the isolate-driver script rebase all paths to be
relative to the isolate-file location. This is an assumption
of the go binaries and is needed for batcharchive to work.

In gyp, actions were executed relative to the gyp file that
specified them, while in gn it's relative to the product dir.

BUG=chromium:474921

Review-Url: https://codereview.chromium.org/2039873002
Cr-Commit-Position: refs/heads/master@{#36746}

BUG=

Review-Url: https://codereview.chromium.org/2040823003
Cr-Commit-Position: refs/heads/master@{#36745}

Passing in the isolate and pointer compare the instnance against the
corresponding constant is always faster than decoding the instance types.

BUG=

Review-Url: https://codereview.chromium.org/2028983002
Cr-Commit-Position: refs/heads/master@{#36744}

This makes sure {NodeProperties::FindFrameStateBefore} can deal with
effect chains that are marked as dead. This can happen when reducers
looking for frame states run together with other reducers killing some
execution paths within the same reduction phase.

R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-617567
BUG=chromium:617567,chromium:617224

Review-Url: https://codereview.chromium.org/2041833002
Cr-Commit-Position: refs/heads/master@{#36743}

Taking over http://crrev.com/1924223002.

BUG=chromium:606711
LOG=N

Committed: https://crrev.com/f42c9e93c80fdf57e8f92bb87f6ed927d0ae4028
Review-Url: https://codereview.chromium.org/2028633002
Cr-Original-Commit-Position: refs/heads/master@{#36633}
Cr-Commit-Position: refs/heads/master@{#36742}

Revert of [build] Use sysroot for linux compilation with clang (patchset #5 id:80001 of https://codereview.chromium.org/2028623002/ )

Reason for revert:
sysroot logic breaks "make arm"

Original issue's description:
> [build] Use sysroot for linux compilation with clang
>
> This ports the configuration for using a sysroot from
> chromium's common.gypi.
>
> This is restricted to clang only.
>
> BUG=chromium:474921, chromium:616032
> LOG=y
>
> Committed: https://crrev.com/c47d3c63695d2999752f5fc61ff171f3ff100553
> Cr-Commit-Position: refs/heads/master@{#36729}

TBR=jochen@chromium.org,vogelheim@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:474921, chromium:616032

Review-Url: https://codereview.chromium.org/2042693003
Cr-Commit-Position: refs/heads/master@{#36741}

Revert of [build] Fix default for target_arch (patchset #1 id:1 of https://codereview.chromium.org/2040803005/ )

Reason for revert:
sysroot logic breaks "make arm"

Original issue's description:
> [build] Fix default for target_arch
>
> Fix after https://codereview.chromium.org/2028623002/
>
> BUG=chromium:474921, chromium:616032
> TBR=vogelheim@chromium.org, jochen@chromium.org
> NOTRY=true
>
> Committed: https://crrev.com/9dcb67dd174fefc98f9c964ef54fed8fe6feb224
> Cr-Commit-Position: refs/heads/master@{#36733}

TBR=vogelheim@chromium.org,jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:474921, chromium:616032

Review-Url: https://codereview.chromium.org/2039853002
Cr-Commit-Position: refs/heads/master@{#36740}

This duplicates some test code (which hopefully can be factored out later), but increases
test coverage.

R=ahaas@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2042773002
Cr-Commit-Position: refs/heads/master@{#36739}

[crankshaft] Fix DoDeferredMathAbsTaggedHeapNumber overwriting the context with some temporary value.

BUG=v8:5067

Review-Url: https://codereview.chromium.org/2033413002
Cr-Commit-Position: refs/heads/master@{#36738}

Rolling v8/build to 9f3f50f2d8b3b751c451c76d9bbf648835256dd5

Rolling v8/third_party/icu to ffa4b6704cf5cc9fec9485731f24a05b2ba94bca

Rolling v8/tools/clang to 27056571d3878fee640fe0e3f1b8ba5e9a7570f6

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

Review-Url: https://codereview.chromium.org/2041803002
Cr-Commit-Position: refs/heads/master@{#36737}

Previously, ZoneVector<MachineType>* printed just as a pointer; now we
print each MachineType in it, separated by commas.

BUG=

Review-Url: https://codereview.chromium.org/2030323002
Cr-Commit-Position: refs/heads/master@{#36736}

This removes the macro in question form the utility header. In the long
run we want to convert all RUNTIME_ASSERTs to CHECKs, now that runtime
functions are no longer fuzzed directly. This is just a first step.

R=bmeurer@chromium.org
BUG=v8:5066

Review-Url: https://codereview.chromium.org/2038013002
Cr-Commit-Position: refs/heads/master@{#36735}

This is mostly about DCHECKs. Enabling some requires a few
changes to tests that were not careful about types.

BUG=

Review-Url: https://codereview.chromium.org/2033703002
Cr-Commit-Position: refs/heads/master@{#36734}

Fix after https://codereview.chromium.org/2028623002/

BUG=chromium:474921, chromium:616032
TBR=vogelheim@chromium.org, jochen@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2040803005
Cr-Commit-Position: refs/heads/master@{#36733}

R=machenbach@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2035313003
Cr-Commit-Position: refs/heads/master@{#36732}

This calls the action that archives test262 in gn. In gn
we can't specify an action output outside the product
directory. This works around it with an extra action
stamp file in the product directory, while the archive
remains in the test directory.

We don't want to generate the archive in the product
directory, as some legacy archiving scripts might include
it and it's too large. It should only be included in the
swarming tasks that are going to use it for testing.

BUG=chromium:474921

Review-Url: https://codereview.chromium.org/2034713005
Cr-Commit-Position: refs/heads/master@{#36731}

This ports:
https://codereview.chromium.org/1991343002

BUG=chromium:599327

Review-Url: https://codereview.chromium.org/2040913002
Cr-Commit-Position: refs/heads/master@{#36730}

This ports the configuration for using a sysroot from
chromium's common.gypi.

This is restricted to clang only.

BUG=chromium:474921, chromium:616032
LOG=y

Review-Url: https://codereview.chromium.org/2028623002
Cr-Commit-Position: refs/heads/master@{#36729}

  port 8d90210a (r36718)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/2039743002
Cr-Commit-Position: refs/heads/master@{#36728}

  port f2da19fe (r36703)

  original commit message:
  Introduce a dedicated Float64Log machine operator, that is either
  implemented by a direct C call or by platform specific code, i.e.
  using the FPU on x64 and ia32.

  This operator is used to implement Math.log as a proper TurboFan
  builtin on top of the CodeStubAssembler.

  Also introduce a NumberLog simplified operator on top of Float64Log
  and use that for the fast inline path of Math.log inside TurboFan
  optimized code.

BUG=

Review-Url: https://codereview.chromium.org/2034393002
Cr-Commit-Position: refs/heads/master@{#36727}

This change requires a single pass over the register set during
bytecode pipeline flushes.

A few bytecode tests are updated too because the order of register
flushes is different.

BUG=v8:4280
LOG=N

Review-Url: https://codereview.chromium.org/2033013002
Cr-Commit-Position: refs/heads/master@{#36726}