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Author SHA1 Message Date
bmeurer@chromium.org
1ef9e22900 [x64] 64-bit shift left by 32 or more covers sign/zero extend. 
TEST=unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/704703002

Cr-Commit-Position: refs/heads/master@{#25123}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25123 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-05 05:58:15 +00:00
ishell@chromium.org
6bee6dcebc Revert "Parser & internalizing: efficiency fixes." 
This reverts commit 94a08565d7 for
breaking layout tests.

TBR=marja@chromium.org

Review URL: https://codereview.chromium.org/692333006

Cr-Commit-Position: refs/heads/master@{#25121}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25121 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 21:37:44 +00:00
dusan.milosavljevic@imgtec.com
7699c9275f MIPS: Improve compare and branch combining. 
TEST=
BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/700873002

Cr-Commit-Position: refs/heads/master@{#25120}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25120 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 19:49:22 +00:00
rossberg@chromium.org
dbc6c86b8c Adjust test262-es6 following --harmony flag change 
TBR=adamk@chromium.org
BUG=

Review URL: https://codereview.chromium.org/702753002

Cr-Commit-Position: refs/heads/master@{#25119}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25119 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 18:38:08 +00:00
balazs.kilvady@imgtec.com
512cd8e728 MIPS: [turbofan] Add AllocateHeapNumberStub to avoid runtime call. 
Port 983ca3f1e7
Port r25107

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

Review URL: https://codereview.chromium.org/699903002

Cr-Commit-Position: refs/heads/master@{#25118}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25118 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 17:20:17 +00:00
titzer@chromium.org
b48e27ea00 Fix branch hint in select. 
R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/703633003

Cr-Commit-Position: refs/heads/master@{#25117}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25117 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 16:16:14 +00:00
rossberg@chromium.org
357882a8e5 1..isPrototypeOf.call(null) should return false, not throw TypeError. 
BUG=v8:3483
LOG=Y
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/433413002

Cr-Commit-Position: refs/heads/master@{#25116}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25116 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 16:14:18 +00:00
rossberg@chromium.org
0b9a70ade3 Remove --harmony implications for incomplete features 
This is in preparation for making --harmony and --es-staging synonyms.
The only remaining difference currently is block-scoping, which is still
implied by --harmony, to avoid regressing on a long-available feature.

Also removes the special-casing of --harmony-proxies.

R=adamk@chromium.org
BUG=

Review URL: https://codereview.chromium.org/693153004

Cr-Commit-Position: refs/heads/master@{#25115}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25115 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 16:05:44 +00:00
titzer@chromium.org
3386da98fb Reduce size of array in polymorph-arrays.js. 
R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/686273003

Cr-Commit-Position: refs/heads/master@{#25114}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25114 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 15:54:48 +00:00
hpayer@chromium.org
751289fb3a Fix predictable mode when job based sweeping is off. 
BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/697423002

Cr-Commit-Position: refs/heads/master@{#25113}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25113 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 15:20:47 +00:00
arv@chromium.org
d6ca29ce4c Refactor ObjectGetOwnPropertyKeys to accept bitmask rather than boolean 
BUG=v8:3549
LOG=Y
R=arv@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/557023002

Patch from Caitlin Potter <caitpotter88@gmail.com>.

Cr-Commit-Position: refs/heads/master@{#25111}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25111 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 15:08:47 +00:00
titzer@chromium.org
faa71f966a Introduce Diamond, a helper for building diamond-shaped control patterns. 
R=mstarzinger@chromium.org, bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/694063005

Cr-Commit-Position: refs/heads/master@{#25110}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25110 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 14:37:44 +00:00
marja@chromium.org
94a08565d7 Parser & internalizing: efficiency fixes. 
1) In ParseLazy, we're already using the heap, so we can also tell
AstValueFactory to internalize immediately. This is more efficient.

2) No need to collect the values in values_ and strings_ if they're already
internalized.

3) No need to collect AstValues which are strings in values_ since they don't
need to be internalized (the underlying strings will be internalized
separately).

BUG=429168
LOG=N
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/693803004

Cr-Commit-Position: refs/heads/master@{#25109}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25109 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 14:16:17 +00:00
bmeurer@chromium.org
3897182246 [turbofan] Add AllocateHeapNumberStub to avoid runtime call. 
TEST=unittests
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/703473004

Cr-Commit-Position: refs/heads/master@{#25107}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25107 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 12:58:49 +00:00
bmeurer@chromium.org
e56d4b92cd [turbofan] Fix branch hints for ChangeInt32ToTagged and ChangeTaggedToUI32. 
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/694353006

Cr-Commit-Position: refs/heads/master@{#25106}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25106 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 12:06:44 +00:00
ulan@chromium.org
6ff255eabc Disable long running gc-stress tests on arm64 for TF. 
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/701723004

Cr-Commit-Position: refs/heads/master@{#25105}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25105 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 11:58:49 +00:00
yangguo@chromium.org
c66a3f95ae Revert "Optimize function across closures." 
This reverts r25102.

TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/699143002

Cr-Commit-Position: refs/heads/master@{#25104}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25104 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 11:40:45 +00:00
bmeurer@chromium.org
e6cfe350f8 [turbofan] Fix recognition of Uint32Div in simplified lowering. 
TEST=mjsunit/asm
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/701813003

Cr-Commit-Position: refs/heads/master@{#25103}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25103 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 11:37:47 +00:00
yangguo@chromium.org
1d66934565 Optimize function across closures. 
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/699633002

Cr-Commit-Position: refs/heads/master@{#25102}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25102 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 11:06:44 +00:00
aandrey@chromium.org
a17b087a7d Follow up to fix v8::Exception::GetMessage() actually do what it was intended to. 
The main thing for v8::Exception::GetMessage() is to extract message location from
error stack trace, even when stack trace capturing is off (when DevTools is closed).

BUG=chromium:427954
R=yangguo@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/696703002

Cr-Commit-Position: refs/heads/master@{#25101}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25101 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 10:07:11 +00:00
aandrey@chromium.org
35eaced208 Add debug mirror support for ES6 Map/Set iterators. 
This is to show values preview of an iterator in DevTools console.

API=v8::Value::IsMapIterator, v8::Value::IsSetIterator
BUG=chromium:427868
R=arv@chromium.org, yangguo@chromium.org, adamk@chromium.org
LOG=Y

Review URL: https://codereview.chromium.org/693813002

Cr-Commit-Position: refs/heads/master@{#25100}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25100 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 10:02:43 +00:00
ishell@chromium.org
d7bc74f866 TransitionArray::Search() now returns insertion index if the entry was not found. 
This is a prerequisite for https://codereview.chromium.org/661133002/.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/698043003

Cr-Commit-Position: refs/heads/master@{#25099}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25099 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 09:30:20 +00:00
verwaest@chromium.org
568ff34557 Actually also advance the iterator in StorePropertyWithInterceptor 
BUG=v8:3636
LOG=n
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/702523002

Cr-Commit-Position: refs/heads/master@{#25098}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25098 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 09:23:31 +00:00
dcarney@chromium.org
7cb25f5020 [turbofan] add RegisterConfiguration to decouple arch specific register layouts from compiler 
R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/694313002

Cr-Commit-Position: refs/heads/master@{#25097}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25097 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 09:22:32 +00:00
machenbach@chromium.org
470be4ac0c Whitespace CL to trigger bots. 
Cr-Commit-Position: refs/heads/master@{#25096}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25096 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 08:57:21 +00:00
danno@chromium.org
10059cb77d Adds dependency on sanitizer 
The santizer target is empty if no sanitizers are defined, otherwise
it contains the necessary targets. Because of this we can always
depend on it. Without this dep asan builds fail.

R=brettw@chromium.org, danno@chromium.org

Review URL: https://codereview.chromium.org/697763002

Patch from Scott Violet <sky@chromium.org>.

Cr-Commit-Position: refs/heads/master@{#25094}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25094 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 08:28:16 +00:00
bmeurer@chromium.org
cfb6e2a7b5 [turbofan] Also print the non-value inputs in schedule. 
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/702643002

Cr-Commit-Position: refs/heads/master@{#25092}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25092 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 07:36:09 +00:00
bmeurer@chromium.org
18e18d21f1 [turbofan] Strip useless sign-extension for store8/store16. 
TEST=unittests
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/698963002

Cr-Commit-Position: refs/heads/master@{#25091}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25091 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 07:35:49 +00:00
arv@chromium.org
a27c77221e Remove FAIL from test262-es6.status 
TBR=rossberg
BUG=v8:3642
LOG=Y

Review URL: https://codereview.chromium.org/698073003

Cr-Commit-Position: refs/heads/master@{#25088}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25088 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 21:48:31 +00:00
arv@chromium.org
7a63c74caf Classes: static should still be treated as a strict reserved word 
When --harmony-classes is enabled we did not treat static as a
strict reserved word.

BUG=v8:3642
LOG=Y
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/652743009

Cr-Commit-Position: refs/heads/master@{#25087}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25087 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 19:54:14 +00:00
jkummerow@chromium.org
e525e76f21 Fix a few nits found by PVS Studio 
BUG=v8:3192
LOG=n
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/185563004

Cr-Commit-Position: refs/heads/master@{#25086}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25086 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 19:45:25 +00:00
titzer@chromium.org
ce06f447d6 Fix build because of dead fields. 
TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/699673002

Cr-Commit-Position: refs/heads/master@{#25085}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25085 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 17:53:22 +00:00
titzer@chromium.org
5bba6b20e6 Make visualizer robust to graphs with NULL inputs. 
R=mstarzinger@chromium.org, jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/652263002

Cr-Commit-Position: refs/heads/master@{#25084}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25084 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 17:42:17 +00:00
erikcorry@chromium.org
3d62e24c5f Introduce phantom weak handles in the API and use them internally for debug info 
R=ulan@chromium.org, jochen@chromium.org
BUG=

Review URL: https://codereview.chromium.org/687003005

Cr-Commit-Position: refs/heads/master@{#25083}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25083 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 17:24:22 +00:00
ishell@chromium.org
a19c18ac6d Reland "Limit the number of transitions allowed per hidden class." 
BUG=chromium:427813
LOG=N
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/676393002

Cr-Commit-Position: refs/heads/master@{#25082}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25082 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 16:46:29 +00:00
balazs.kilvady@imgtec.com
8960f5d856 MIPS: [turbofan] Also optimize unsigned division by constant. 
Port r25061 (7fe697f)

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

Review URL: https://codereview.chromium.org/701543002

Cr-Commit-Position: refs/heads/master@{#25081}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25081 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 16:41:18 +00:00
dusan.milosavljevic@imgtec.com
14e2d5d029 Unbreak build fon non-TF targets. 
Mips64 is affected but not for long.

TEST=
BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/689113003

Cr-Commit-Position: refs/heads/master@{#25080}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25080 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 15:48:43 +00:00
machenbach@chromium.org
29552a4004 Fix auto roll update. 
Auto roll requires an additional "git fetch" now that it uses
a workdir. Before, the checkout used to be updated
externally.

BUG=408523
LOG=n
TEST=script_test.py
R=tandrii@chromium.org
TBR=tandrii@chromium.org

Review URL: https://codereview.chromium.org/695323002

Cr-Commit-Position: refs/heads/master@{#25079}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25079 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 15:39:43 +00:00
bmeurer@chromium.org
744c66bc29 [turbofan] Introduce separate SelectLowering reducer. 
Split lowering of Select nodes into a separate graph reducer and be more
clever when lowering to diamonds, i.e. reuse diamonds that have the same
condition and only add more phis to it.

TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/702463002

Cr-Commit-Position: refs/heads/master@{#25078}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25078 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 15:17:47 +00:00
jarin@chromium.org
1c1a1a1ae6 Fix uninitialized fields in the BinaryOperation ast node. 
R=jkummerow@chromium.org, svenpanne@chromium.org
BUG=chromium:429194
LOG=n

Review URL: https://codereview.chromium.org/701533002

Cr-Commit-Position: refs/heads/master@{#25077}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25077 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 14:59:49 +00:00
verwaest@chromium.org
3ea82aa917 Don't double-check elements in the prototype chain in array builtins 
BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/701513002

Cr-Commit-Position: refs/heads/master@{#25076}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25076 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 14:06:15 +00:00
jarin@chromium.org
83806d568d [turbofan] Fix Typer::Rangify to handle integral bitset types. 
R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/688413003

Cr-Commit-Position: refs/heads/master@{#25074}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25074 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:59:16 +00:00
dcarney@chromium.org
273a9ad200 build fix after 25072 
TBR=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/688323005

Cr-Commit-Position: refs/heads/master@{#25073}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25073 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:55:44 +00:00
dcarney@chromium.org
e17194ba52 build fix after r25071 
TBR=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/684523003

Cr-Commit-Position: refs/heads/master@{#25072}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25072 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:42:13 +00:00
dcarney@chromium.org
0d1cdebad2 [turbofan] initial framework for unittesting of register allocator 
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/683133005

Cr-Commit-Position: refs/heads/master@{#25071}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:27:23 +00:00
machenbach@chromium.org
37092e40b9 Fix svn commit for deleted files in release scripts. 
BUG=408523
LOG=n
TEST=script_test.py
TBR=tandrii@chromium.org

Review URL: https://codereview.chromium.org/685623004

Cr-Commit-Position: refs/heads/master@{#25070}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25070 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:17:15 +00:00
bmeurer@chromium.org
84355c8295 Revert "[turbofan] Fix bug in Rangify." 
This reverts commit r25067 for breaking Win64.

TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/697093002

Cr-Commit-Position: refs/heads/master@{#25069}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25069 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 12:36:45 +00:00
bmeurer@chromium.org
c95fb279d1 [turbofan] Fix bug in Rangify. 
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/699603002

Cr-Commit-Position: refs/heads/master@{#25067}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25067 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 11:51:18 +00:00
bmeurer@chromium.org
5dc9365bc0 [turbofan] Enforce allocation of register for imull/mull. 
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/697073002

Cr-Commit-Position: refs/heads/master@{#25066}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25066 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 11:50:43 +00:00
bmeurer@chromium.org
832a5b930d [turbofan] Positive dividends are heavily favored for Int32Mod. 
Mark negative dividend case as deferred, as modulus by power of two with
negative dividend almost never appears in practice.

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/699573002

Cr-Commit-Position: refs/heads/master@{#25065}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25065 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 10:44:44 +00:00