Commit Graph

19142 Commits

Author SHA1 Message Date
jarin@chromium.org
d75f736c11 [turbofan] Use register for instruction operands when SameAsFirst is specified.
As the register allocator cannot reuse spill slots, SameAsFirst
constraint means that we would have to do an expensive move to a
differen spill slot if we choose to spill. Forcing the operand
to a register is cheaper.

In zlib, we get >10% speed-up for ia32, >25% for x64.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/650083003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24580 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-14 08:34:20 +00:00
hpayer@chromium.org
2c18a51c72 Increase final idle time in idle notifcation of test test-api/Regress2107.
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/653863002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24579 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-14 08:10:41 +00:00
bmeurer@chromium.org
8a00950303 [arm] Drop SMMLS support.
Apparently

 SMMLS r, b, c, a

computes

 r = ((a << 32) - b * c) >> 32

while the documentation is kinda misleading and states that it should
compute

 r = a - ((b * c) >> 32)

The actual behavior is kinda useless, so we drop the instruction again.

TEST=cctest,unittests
TBR=dcarney@chromium.org

Review URL: https://codereview.chromium.org/654653004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24577 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-14 07:47:27 +00:00
bmeurer@chromium.org
8950e0a3de [arm] Add support for SMMLA, SMMLS and SMMUL.
TEST=cctest,unittests
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/648283002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24575 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-14 05:03:04 +00:00
bmeurer@chromium.org
b472d9a045 MIPS: Add OWNERS file for compiler unittests.
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/648413003

Patch from Paul Lind <paul.lind@imgtec.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24574 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-14 03:55:43 +00:00
bmeurer@chromium.org
a433541a65 Fix non-TF targets after r24546.
Fix mips64 and x87 builds.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/644463005

Patch from Paul Lind <paul.lind@imgtec.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24573 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-14 03:46:37 +00:00
weiliang.lin@intel.com
c704369eab X87: Support for super assignments in for..in.
port r24560.

original commit message:
  Support for super assignments in for..in.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/653823002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24572 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-14 02:55:29 +00:00
paul.lind@imgtec.com
d9cda16c6a MIPS: [turbofan] Make VisitBranch and friends to backend specific.
Port r24546 (c3443cd)

Original commit message:
This is required to fix a tricky branch fusion bug on ARM, which was
caused by the interaction between the architecture-independent and
architecture-specific parts of the InstructionSelector. In the end it
wasn't worth sharing a few common lines of code for the additional
complexity, especially if we also want to properly support architectures
without any dedicated flags register (i.e. MIPS).

TEST=mjsunit,unittests
BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/644973003

Patch from Balazs Kilvady <balazs.kilvady@imgtec.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24571 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 23:31:59 +00:00
balazs.kilvady@imgtec.com
55f77c28ac MIPS: Support for super assignments in for..in.
Port r24560 (ef1070b)

BUG=v8:3330
LOG=N
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/641803003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24570 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 19:28:25 +00:00
hpayer@chromium.org
c7149e50a3 Fix IdleNotificationFinishMarking test on slow devices.
BUG=
TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/641533004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24569 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 18:54:20 +00:00
mstarzinger@chromium.org
25dbc2476c Switch schedule early phase to basic blocks.
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/649203002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24568 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 16:32:12 +00:00
hpayer@chromium.org
d1e693a43a Check if there is still time before finalizing an incremental collection.
BUG=
R=erik.corry@gmail.com, ulan@chromium.org

Review URL: https://codereview.chromium.org/629903003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24567 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 16:27:55 +00:00
sigurds@chromium.org
aa67d12f09 Revert "Fix scheduler to correctly schedule nested diamonds."
This reverts commit 0ab306041a6eba99fe5e2ef78251de137321f559.

"Fix" make scheduler run out of memory.

TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/656473002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24566 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 16:08:29 +00:00
rmcilroy@chromium.org
08941c0140 Refactor FrameAndConstantPoolScope and ConstantPoolUnavailableScope to be architecture independent
Move the FrameAndConstantPoolScope and ConstantPoolUnavailableScope out of the arm architecture directory to enable them to be used on all architectures.

R=rmcilroy@chromium.org

Review URL: https://codereview.chromium.org/609843002

Patch from André Baixo <baixo@google.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24565 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 14:41:33 +00:00
dusan.milosavljevic@imgtec.com
403dc88519 MIPS: Unbreak gn build, missing source files for MIPS tf.
TEST=
BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/654583002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24564 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 14:18:10 +00:00
sigurds@chromium.org
0f5949d605 Fix scheduler to correctly schedule nested diamonds.
The scheduler rewires control based on the last *control*
node that appears in the schedule of a block. This is not
sufficient to account for dependencies.

This patch adds additional dependencies to floating control
nodes. Given a floating control node A, every non-control
dependency of every node B that depends on A is introduces
as an additional dependency of A.

This allows the scheduler to correctly schedule two
diamonds A, B, if their only correct schedule is to
schedule B into the ifTrue successor in A.

TEST=cctest/test-scheduler/NestedFloatingDiamonds
R=mstarzinger@chromium.org, titzer@chromium.org

Review URL: https://codereview.chromium.org/602083003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24561 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 13:07:49 +00:00
dslomov@chromium.org
952690a148 Support for super assignments in for..in.
R=ishell@chromium.org, arv@chromium.org
BUG=v8:3330
LOG=N

Review URL: https://codereview.chromium.org/639243003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24560 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 12:46:46 +00:00
machenbach@chromium.org
791a3c4309 Make releases script ready for the new git workflow.
BUG=chromium:410721
LOG=n
TEST=script_test.py
TBR=tandrii@chromium.org

Review URL: https://codereview.chromium.org/646383002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24558 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 12:34:53 +00:00
mstarzinger@chromium.org
6d6d727cd4 Mark some test262 cases as known failures after r24495.
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/650863002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24555 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 11:11:15 +00:00
bmeurer@chromium.org
5c1f7b5aa1 [turbofan] Optimize Int32Mod by power-of-two.
TEST=mjsunit/asm/int32-tmod,unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/649083005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24554 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 11:09:32 +00:00
neis@chromium.org
a2f4963abd Revert "Refine expression typing, esp. by propagating range information."
This reverts commit 24552.

TBR=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/648163002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24553 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 10:48:01 +00:00
neis@chromium.org
5a0ff8e656 Refine expression typing, esp. by propagating range information.
R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/618803003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24552 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 10:40:29 +00:00
dslomov@chromium.org
c0504eeffd Fix typedarray tests.
1. Fixed typo. lenght -> length. Arbitary -> Arbitrary.
2. TypedArray DataView property getters should throw TypeError when called on
    incompatible types.
3. Should not use integers as keys in the arbitrary-properties test.

R=dslomov@chromium.org, yangguo@chromium.org

Review URL: https://codereview.chromium.org/652603002

Patch from Xueqiao Xu <xuq@google.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24551 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 09:48:50 +00:00
rmcilroy@chromium.org
03f4956744 v8_external_snapshot target visible only when using v8_use_external_startup_data
Prevent snapshot_blob.bin from being unnecessarily generated when building all targets.
When such file exists, chrome_tests assumes we will load V8's initial snapshot from
external files, even when such feature is turned off, which prevents the tests from
being successfully compiled.

BUG=421063
LOG=N
R=rmcilroy@chromium.org

Review URL: https://codereview.chromium.org/643163002

Patch from André Baixo <baixo@google.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24550 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 09:36:12 +00:00
bmeurer@chromium.org
3dae2a0d3f Run benchmarks tests with --turbo-asm flag.
R=machenbach@chromium.org, mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/646373002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24549 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 09:30:27 +00:00
bmeurer@chromium.org
4a5055174b [turbofan] Embed the actual backing store address for typed loads/stores.
TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/650843002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24548 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 09:17:33 +00:00
marja@chromium.org
363ac55a5d Script streaming: UTF-8 handling fix.
The problem was that there can be several multi-byte UTF-8 characters near the
splitting point of the data chunks, and the code didn't handle it properly.

This was also the source of crbug.com/417891 - I thought the crash can only
happen when V8 is passed invalid UTF-8 data, but it can also happen in the
abovementioned case. After the fix, we handle the valid UTF-8 case and also
guard against invalid UTF-8 data.

R=yangguo@chromium.org
BUG=chromium:417891
LOG=N

Review URL: https://codereview.chromium.org/654503002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24547 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 09:01:54 +00:00
bmeurer@chromium.org
f60bc89083 [turbofan] Make VisitBranch and friends to backend specific.
This is required to fix a tricky branch fusion bug on ARM, which was
caused by the interaction between the architecture-independent and
architecture-specific parts of the InstructionSelector. In the end it
wasn't worth sharing a few common lines of code for the additional
complexity, especially if we also want to properly support architectures
without any dedicated flags register (i.e. MIPS).

TEST=mjsunit,unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/651783003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24546 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 08:15:03 +00:00
dcarney@chromium.org
657052e87f [turbofan] remove graph from InstructionSequence
R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/652643002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24545 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 08:09:27 +00:00
yangguo@chromium.org
f92dc9a1fd Fix build failure.
TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/650823002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24544 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 07:57:40 +00:00
yangguo@chromium.org
33dc53f9cc Always include full reloc info to stubs for serialization.
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/641643006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24543 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 07:50:21 +00:00
dcarney@chromium.org
907ad65dce [turbofan]IA: ChangeFloat32ToFloat64 supports mem operand
BUG=
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/641153003

Patch from Jing Bao <jing.bao@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24542 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 07:42:35 +00:00
dcarney@chromium.org
3396c2badd [turbofan] IA: TruncateFloat64ToFloat32 supports mem operand
BUG=
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/639283003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24541 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 07:12:57 +00:00
weiliang.lin@intel.com
52e156a866 X87: Introduce FeedbackVectorSlot type - better than int.
port r24528.

original commit message:

  Introduce FeedbackVectorSlot type - better than int.

  It's good to have typing around this value.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/645323002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24540 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-13 01:54:44 +00:00
weiliang.lin@intel.com
ed5f2f814c X87: Teach TurboFan to call vector-based ICs.
port r24519.

original commit message:

  Teach TurboFan to call vector-based ICs.

  Additional static information needs to be passed to Load and KeyedLoad calls if
  --vector-ics is turned on

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/645273002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24537 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-11 06:00:44 +00:00
dusan.milosavljevic@imgtec.com
8e092181ae MIPS: Fix loading Float64 constants in turbofan.
TEST=ctest/test-run-machops/RunFloat64SubImm1,
     RunFloat64SubImm2, RunFloat64MulImm, RunFloat64Compare

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/646923003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24536 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 18:00:58 +00:00
adamk@chromium.org
9595c6104e Add test case for SparseJoin misbehavior with getters
BUG=v8:3621
LOG=N
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/645703003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24535 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 17:17:00 +00:00
balazs.kilvady@imgtec.com
f7afce6aea MIPS: Introduce FeedbackVectorSlot type - better than int.
Port r24528 (f7b7e5a)

Original commit message:
It's good to have typing around this value.

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/644583004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24534 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 16:17:10 +00:00
yangguo@chromium.org
ba6e17c494 Split off remaining runtime functions in runtime.cc.
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/638423003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24533 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 14:59:53 +00:00
balazs.kilvady@imgtec.com
396008387b MIPS: Teach TurboFan to call vector-based ICs.
Port r24519 (842debf)

Original commit message:
Additional static information needs to be passed to Load and KeyedLoad calls if
--vector-ics is turned on.

BUG=
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/645883002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24532 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 13:56:34 +00:00
mstarzinger@chromium.org
a56c3ce06c Use phase-local zone in the graph builder.
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/640423005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24531 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 13:40:08 +00:00
ishell@chromium.org
3647fe8016 Disable webkit/array-iterate-backwards test in --gc-stress mode for turbofan
TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/647743002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24530 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 13:36:54 +00:00
jkummerow@chromium.org
ed585c083c Fix type feedback for name-keyed stores
BUG=chromium:422212
LOG=n
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/648703002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24529 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 13:27:52 +00:00
mvstanton@chromium.org
d04617b2db Introduce FeedbackVectorSlot type - better than int.
It's good to have typing around this value.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/641373002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24528 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 13:22:10 +00:00
mvstanton@chromium.org
8f983e7672 Bogus assert caused turbofan failure.
TBR=ishell@chromium.org

Review URL: https://codereview.chromium.org/643913002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24527 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 13:09:41 +00:00
mstarzinger@chromium.org
2d29390448 Improve comments and readability of scheduler.
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/642803003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24526 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 11:57:55 +00:00
mstarzinger@chromium.org
6490b9a656 Remove fixpoint workaround from schedule early phase.
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/646613002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24525 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 11:49:53 +00:00
svenpanne@chromium.org
b17d131779 AST nodes have at most one bailout/typefeedback ID now, saving lots of memory.
This is basically https://codereview.chromium.org/569573002/ done right:

During construction, each node type tells its parent how many IDs it
needs in addition to the parent's ones. This is done all the way up in
the class hierarchy until a node's parent doesn't need any ID. At that
point we know how many IDs in summary are needed, and we reserve the
whole range at once, saving only the base ID of that range. All IDs
are now calculated via simple offsets to that base ID. To all
performaniacs: The C++ compiler simplifies the constant calculation to
a simple load and the addition of a single constant.

Note that the actual code is much simpler than all that prose above. :-)
It's basically how compilers for OO languages figure out vtable entries.

We still have lots of holes due to padding in the AST nodes, but this
will be addressed in a separate CL.

BUG=chromium:417697
LOG=y
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/643633003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24524 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 10:52:31 +00:00
yangguo@chromium.org
6ca8f782aa Reset code age when serializing code objects.
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/642283002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24523 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 10:51:34 +00:00
dslomov@chromium.org
c9049c0325 Keyed loads from super with numeric keys.
R=ishell@chromium.org, arv@chromium.org
BUG=v8:3330
LOG=N

Review URL: https://codereview.chromium.org/638193004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24522 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-10 10:40:29 +00:00