marja@chromium.org
932a29a66a
New compilation API, part 2.
...
This CL makes the Parser produce the data PreParser used to produce. This
enables us to get rid of the unnecessary preparsing phase.
The first part is here: https://codereview.chromium.org/199063003/
BUG=
R=dcarney@chromium.org , svenpanne@chromium.org
Review URL: https://codereview.chromium.org/203353002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20075 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 13:24:13 +00:00
machenbach@chromium.org
a6f9993569
Prepare push to trunk. Now working on version 3.25.20.
...
R=yangguo@chromium.org
TBR=yangguo@chromium.org
Review URL: https://codereview.chromium.org/203193014
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20072 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 13:13:23 +00:00
machenbach@chromium.org
44e3cfc651
Retrieve current version from trunk branch in push-to-trunk.
...
- This moves retrieving and incrementing the version before creating the change log
- Before the prepare push commit will be deprecated (follow up CL), the script deals with 3 build levels. X: the current build level on the last trunk push. X + 1: the build level for this trunk push. X + 2: the build level of the new version file on bleeding edge (to be deprecated).
BUG=
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/203773013
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 13:10:41 +00:00
yangguo@chromium.org
d8c3c5ef0a
Introduce API to trigger exception on JS execution.
...
R=jochen@chromium.org , pmarch@chromium.org
Review URL: https://codereview.chromium.org/203223013
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20070 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 13:06:53 +00:00
hpayer@chromium.org
9be17fb30e
Temporarily disable evacuation verification for parallel-concurrently swept pages.
...
BUG=
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/204443002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20065 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 11:56:11 +00:00
mvstanton@chromium.org
5e4febb06e
Array constructor expects AllocationSite or undefined as feedback.
...
Redefine Array constructor to expect an AllocationSite in the feedback
register or undefined. This will make code simpler as we support
pretenuring feedback for all constructed objects.
R=hpayer@chromium.org
Review URL: https://codereview.chromium.org/203173003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20064 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 11:51:30 +00:00
hpayer@chromium.org
42de2044a9
Account for right object size when left trimming arrays.
...
BUG=
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/203833005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20063 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 11:37:56 +00:00
yangguo@chromium.org
0bc684a794
Introduce per-isolate assert scopes and API to guard JS execution.
...
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/198253004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20062 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 11:31:43 +00:00
hpayer@chromium.org
0f1f071751
Access old space marking bits from runtime only when incremental marking is in MARKING state.
...
BUG=
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/203523009
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20057 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 10:48:54 +00:00
jochen@chromium.org
79f3c66d00
Run mozilla and webkit of fast quickcheck archs as well
...
BUG=none
R=svenpanne@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/204363002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20056 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 10:48:44 +00:00
machenbach@chromium.org
a20d5731e8
Prepare push to trunk. Now working on version 3.25.19.
...
R=yangguo@chromium.org
TBR=yangguo@chromium.org
Review URL: https://codereview.chromium.org/199273004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20055 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 10:48:20 +00:00
machenbach@chromium.org
23b0228614
Directly modify version file on trunk branch in push-to-trunk.
...
- This also shifts the push revision by one to prepare for the deprecation of the prepare push commit
- The version increment is still based on the bleeding_edge version.cc. This will be changed in a follow up CL.
BUG=
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/200763013
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20054 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 10:46:24 +00:00
rmcilroy@chromium.org
0acbcf9876
Reland "Add out-of-line constant pool support to Arm."
...
This CL adds out-of-line constant pool support to Arm. A ConstantPoolBuilder
object is introduced to manage building of the ConstantPoolArray for a given
code object.
This CL depends on the following CLs landing first:
https://codereview.chromium.org/138503002/
https://codereview.chromium.org/179813005/
https://codereview.chromium.org/183553003/
https://codereview.chromium.org/183803022/
https://codereview.chromium.org/183883011/
https://codereview.chromium.org/186733006/
https://codereview.chromium.org/188063002/
https://codereview.chromium.org/190793002/
https://codereview.chromium.org/190823002/
https://codereview.chromium.org/190833002/
https://codereview.chromium.org/190883002/
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/204323004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20053 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 10:32:12 +00:00
yangguo@chromium.org
bd2397c90c
Revert "Add out-of-line constant pool support to Arm."
...
This reverts commit r20051.
TBR=rmcilroy@chromium.org
Review URL: https://codereview.chromium.org/204403002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20052 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 09:53:58 +00:00
rmcilroy@chromium.org
9415863c97
Add out-of-line constant pool support to Arm.
...
This CL adds out-of-line constant pool support to Arm. A ConstantPoolBuilder
object is introduced to manage building of the ConstantPoolArray for a given
code object.
This CL depends on the following CLs landing first:
https://codereview.chromium.org/138503002/
https://codereview.chromium.org/179813005/
https://codereview.chromium.org/183553003/
https://codereview.chromium.org/183803022/
https://codereview.chromium.org/183883011/
https://codereview.chromium.org/186733006/
https://codereview.chromium.org/188063002/
https://codereview.chromium.org/190793002/
https://codereview.chromium.org/190823002/
https://codereview.chromium.org/190833002/
https://codereview.chromium.org/190883002/
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/191233003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20051 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 09:38:20 +00:00
hpayer@chromium.org
8e749aaafd
Added sweeping time measurement for old space sweeping.
...
BUG=
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/203263014
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20050 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 09:27:42 +00:00
haitao.feng@intel.com
e812aca6b3
Introduce Push and Pop macro instructions for x64
...
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/199903002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20049 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 08:59:04 +00:00
svenpanne@chromium.org
1a6f977d6a
Tweaked FlooringDiv back to TruncatingDiv again.
...
This is a first step towards getting the flooring division by a
constant working again (which will be a separate CL).
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/197873029
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20048 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 07:01:08 +00:00
machenbach@chromium.org
34f70c7dea
Prepare push to trunk. Now working on version 3.25.18.
...
R=jkummerow@chromium.org
TBR=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/201153018
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20045 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-19 01:04:33 +00:00
marja@chromium.org
934e58d3a3
(Pre)Parser unification: use shorter type names.
...
R=mstarzinger@chromium.org
BUG=
Review URL: https://codereview.chromium.org/203493002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20044 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 17:05:38 +00:00
alexandre.rames@arm.com
1330326830
A64: Use appropriate return types for the simulator fpcr and nzcv members.
...
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/203343003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20043 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 16:44:07 +00:00
yangguo@chromium.org
0dd31685f0
Revert "First attempt at providing default traits for PersistentValueMap."
...
This reverts r20038.
TBR=vogelheim@chromium.org
Review URL: https://codereview.chromium.org/203553002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20042 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 16:32:39 +00:00
mvstanton@chromium.org
d30490008a
Increase pretenure ratio from 60% to 85%
...
As pretenure-call-new comes online, this is a better performing ratio
overall.
R=hpayer@chromium.org
Review URL: https://codereview.chromium.org/196383032
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20041 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 15:19:35 +00:00
rossberg@chromium.org
b7b40e2b84
Remove Promise.cast
...
...as per January meeting. Renames 'cast' to 'resolve'. We rename the prior 'resolve' to 'accept', to keep the chain API usable.
R=svenpanne@chromium.org
BUG=
Review URL: https://codereview.chromium.org/200763012
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20040 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 15:03:35 +00:00
m.m.capewell@googlemail.com
2e555d2887
A64: ElementsKind TODOs
...
Replace LoadElementsKind with LoadElementsKindFromMap, remove unneeded TODO in
DoStringCharFromCode, improve constraints for DoCheckValue and improve code for
ElementsKind checking in StoreArrayLiteralElementStub.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/202853005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20039 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 15:01:55 +00:00
dcarney@chromium.org
6deb7b0db4
First attempt at providing default traits for PersistentValueMap.
...
BUG=
R=dcarney@chromium.org
Review URL: https://codereview.chromium.org/201643003
Patch from Daniel Vogelheim <vogelheim@chromium.org>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20038 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 15:01:12 +00:00
rossberg@chromium.org
aa250ea41a
Promises: make null a legal argument for .then
...
R=svenpanne@chromium.org
BUG=
Review URL: https://codereview.chromium.org/203453002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20037 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 14:55:43 +00:00
alexandre.rames@arm.com
88eba5e388
A64: Force emission of the veneer pool emission when required.
...
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/203443003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20036 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 14:26:26 +00:00
ulan@chromium.org
18104111f4
Refactor GetCodeCopyFromTemplate to get a single point where objects are replaced in code.
...
BUG=
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/197283017
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20035 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 14:15:09 +00:00
alexandre.rames@arm.com
611ea747ef
A64: Handle a few TODOs.
...
Below are notes about some of the TODOs handled.
* In Simulator::Debug:
We haven't had issues with printing in the debugger for a while. If the
feature turns out to be still lacking an issue can be raised.
* In SubStringStub::Generate:
There is no need to jump there. The StringCharAtGenerator is asked to set
the result in x0, and the return sequence following only uses two instructions.
Also, we would need to jump after the native counter increment instead of the
return_x0 label.
* In ArrayPushStub::Generate:
Raised an internal issue to check and update the ARM code.
* In MacroAssembler::CopyBytes:
The new code should be faster for bulk copies. Raised an internal issue to
investigate and improve this function.
* In MacroAssembler::EnterExitFrame:
Unless we actually find something is wrong, this is working and looks ok.
Also fixed the comments about the FP registers.
* Comment for BumpSystemStackPointer:
Removed the comment at the declaration site and updated the TODO in the
implementation.
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/196473021
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20034 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 14:00:21 +00:00
ulan@chromium.org
487ca9e384
Fix TransitionElementsKindStub to handle non-JSArray objects correctly.
...
BUG=352982
LOG=N
TEST=mjsunit/regress/regress-352982.js
R=danno@chromium.org
Review URL: https://codereview.chromium.org/196343023
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20033 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 13:29:29 +00:00
machenbach@chromium.org
bd48e40ad1
Prepare push to trunk. Now working on version 3.25.17.
...
R=yangguo@chromium.org
TBR=yangguo@chromium.org
Review URL: https://codereview.chromium.org/203223004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20030 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 13:02:41 +00:00
machenbach@chromium.org
c06c9f8e1e
Deprecate ChangeLog on bleeding_edge.
...
- This adds a sentinel to the ChangeLog on bleeding edge.
- Modifying the ChangeLog file directly when pushing to trunk is now no longer possible. If further modifications to the ChangeLog in manual push-to-trunk mode are required (e.g. after the prepare push LGTM), the change log entry temp file must be edited.
- Functionality that is no longer needed is removed.
BUG=
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/199893005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20029 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 12:46:48 +00:00
yangguo@chromium.org
c76a97159f
Handlify callers of Object::GetElement.
...
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/200363002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20028 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 12:34:02 +00:00
yangguo@chromium.org
5bca14a33e
Fix race between VisitSmiRoots and SetStackLimit.
...
R=hpayer@chromium.org
Review URL: https://codereview.chromium.org/198833006
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20026 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 12:21:07 +00:00
rossberg@chromium.org
9b28aed3f6
Introduce representation types
...
Also:
- improve type pretty-printing,
- update doc comments,
- some renamings for consistency.
R=mstarzinger@chromium.org
BUG=
Review URL: https://codereview.chromium.org/176843006
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20025 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 11:50:18 +00:00
ishell@chromium.org
acf695e37a
Handlification of ArrayConstructorCommon().
...
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/201303009
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20024 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 11:38:27 +00:00
rmcilroy@chromium.org
be0bc25bbb
Add support for movw/movt immediate loads to BackEdgeTable on ARM to enable ool constant pool.
...
R=rodolph.perfetta@arm.com , ulan@chromium.org
Review URL: https://codereview.chromium.org/190833002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20023 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 11:36:19 +00:00
dslomov@chromium.org
6c01c3fd56
Apply numeric casts correctly in typed arrays and related code.
...
R=jkummerow@chromium.org
BUG=353004
LOG=Y
Committed: https://code.google.com/p/v8/source/detail?r=20020
Review URL: https://codereview.chromium.org/201873005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20022 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 10:55:29 +00:00
dslomov@chromium.org
a6224272fd
Revert "Apply numeric casts correctly in typed arrays and related code."
...
This reverts commit r20020 for breaking Win64 build.
TBR=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/199523006
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20021 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 10:50:00 +00:00
dslomov@chromium.org
849187eab0
Apply numeric casts correctly in typed arrays and related code.
...
R=jkummerow@chromium.org
BUG=353004
LOG=Y
Review URL: https://codereview.chromium.org/201873005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20020 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 10:23:50 +00:00
rossberg@chromium.org
58d623f228
Stage ES6 promises and weak collections
...
Split collections flag into weak and non-weak.
R=mstarzinger@chromium.org
BUG=
Review URL: https://codereview.chromium.org/201593004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20019 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 09:57:14 +00:00
svenpanne@chromium.org
d7844ec8cc
Robustified address calculations on A64.
...
We no longer rely on the (adventurous) assumption that the class
Instruction is empty, implying sizeof(Instruction) == 1. This will
greatly simplify upcoming refactorings.
R=rodolph.perfetta@gmail.com
Review URL: https://codereview.chromium.org/201843003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20018 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 07:13:55 +00:00
machenbach@chromium.org
4b01e032c0
Prepare push to trunk. Now working on version 3.25.16.
...
R=jkummerow@chromium.org
TBR=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/201153011
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20015 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-18 01:04:55 +00:00
plind44@gmail.com
9337a45ab3
MIPS: Utility functions for pretenure call new.
...
Port r19998 (6b07a42)
Original commit message:
These functions aren't yet called in the tree but will be in the next days. AssertUndefinedOrAllocationSite is to be used in several places where AllocationSite feedback is optional.
BUG=
R=plind44@gmail.com
Review URL: https://codereview.chromium.org/196423018
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20014 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-17 18:27:44 +00:00
plind44@gmail.com
037e981939
MIPS: Fixed spec violation of storing to length of a frozen object.
...
Port r20005 (d647ec2)
BUG=chromium:350890
LOG=N
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/202063003
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20013 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-17 18:16:19 +00:00
rmcilroy@chromium.org
4268685a3b
Update constant pool correctly when resuming a generator
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This CL depends on the following CLs landing first:
https://codereview.chromium.org/188063002/
https://codereview.chromium.org/190793002/
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/190823002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20012 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-17 17:29:03 +00:00
verwaest@chromium.org
5aaa513630
Don't generate keyed store ICs for global proxies.
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BUG=352983
LOG=y
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/197873025
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20011 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-17 17:19:39 +00:00
alexandre.rames@arm.com
d83e87aeea
A64: Introduce a DeoptimizeIfMinusZero() helper.
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R=ulan@chromium.org
Review URL: https://codereview.chromium.org/200413002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20010 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-17 17:18:31 +00:00
ulan@chromium.org
2cb4e78e74
Fix mjsunit/compiler/concurrent-invalidate-transition-map.js test.
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BUG=v8:3156
LOG=N
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/180053003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20009 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-03-17 17:00:48 +00:00