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Author SHA1 Message Date
danno@chromium.org
57a0c6c6e3 Inline ordered relational compares of mixed double/undefined values. 
Allow Crankshaft to inline ordered relational comparisons (<, >, <=, >=) that have undefined arguments in addition to double value arguments (rather than calling the generic Compare stub).

R=fschneider@chromium.org
TEST=test/mjsunit/comparison-ops-and-undefined.js

Review URL: https://chromiumcodereview.appspot.com/9584006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10905 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-02 13:40:14 +00:00
fschneider@chromium.org
751d53d9d2 Make trace-hydrogen output more visualizer-friendly. 
Review URL: https://chromiumcodereview.appspot.com/9580005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10904 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-02 13:05:59 +00:00
vegorov@chromium.org
f416a684b2 Disable constructor inlining. 
There are failures on Kraken.

R=fschneider@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9585011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10903 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-02 12:50:42 +00:00
yurys@chromium.org
827e827b38 Cache result of ScriptNameOrSourceURL function. The function is quite slow on large(several MBs) scripts which causes significant slowdown when capturing stack trace for such scripts. 
Review URL: https://chromiumcodereview.appspot.com/9564012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10902 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-02 12:27:15 +00:00
vegorov@chromium.org
ff6ebf7dff Introduce basic type feedback for for-in statements to avoid deopts. 
R=fschneider@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9571001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10901 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-02 11:33:33 +00:00
mstarzinger@chromium.org
774e3f4575 MIPS: Properly check fast array property in StoreIC::GenerateArrayLength. 
This is the cleanup of an old todo from r10254 (93483b6eb).

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9570010
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10896 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 17:20:11 +00:00
fschneider@chromium.org
fde2ae0fc7 Prepare push to trunk. Now working on version 3.9.15. 
Review URL: https://chromiumcodereview.appspot.com/9570016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10893 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 15:37:17 +00:00
fschneider@chromium.org
570a499bce MIPS: Additional explicit zone allocation changes. 
These changes were not included in r10863 (226afed4) because of patch submission ordering.

BUG=
TEST=
Patch from Daniel Kalmar <kalmard@homejinni.com>.
Review URL: https://chromiumcodereview.appspot.com/9566003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10892 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 12:56:02 +00:00
fschneider@chromium.org
1e40f7ac2c Fix a register assignment bug in typed array stores without SSE3 available. 
The old code used a separate HToInt32 instruction which had a wrong register
constraint for the input register which caused wrong result when the stored value
is used after a typed array store. (UseRegister instead of UseTempRegister) when no
SSE3 is available.

This change fixes it by replacing HToInt32 with the corresponding HChange
instruction which has correct register contraints.

TEST=mjsunit/compiler/regress-toint32.js
Review URL: https://chromiumcodereview.appspot.com/9565007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10891 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 12:45:46 +00:00
mstarzinger@chromium.org
1009e414b6 MIPS: Implement inlined object allocation in Crankshaft. 
Port r10881 (0d25c61e).

Original commit message:

Generates inlined code for object allocation specific to the initial map
of the given constructor function. Also forces completion of inobject
slack tracking while crankshafting to finalize instance size of these
objects.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9569008
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10890 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 12:38:58 +00:00
erik.corry@gmail.com
4aa32dbdb4 MIPS: Fix secondary stub cache and add a test for the stub cache lookups. This is a commit of https://chromiumcodereview.appspot.com/9566004 for Daniel Kalmar 
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10885 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 12:12:56 +00:00
mstarzinger@chromium.org
4eaaced657 Improve constructor inlining backout. 
This improves the generated hydrogen graph by also removing the obsolete
HCheckFunction instruction if we backout of inlining constructors.

R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9537004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10884 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 11:50:11 +00:00
yangguo@chromium.org
3a457381d7 Update test262 expectations concerning 64-bit precision double. 
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9540010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10883 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 11:37:10 +00:00
fschneider@chromium.org
a8980079a0 Add flag --trace-phase to selectively produce IR trace output. 
By default --trace-hydrogen only generates the final IR (before
code generation). The other phases can be printed by specifying
them by their first letter. Currently H=HIR, L=LIR or Z=final IR (default)
are recognized.
Review URL: https://chromiumcodereview.appspot.com/9535009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10882 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 11:33:37 +00:00
mstarzinger@chromium.org
fd5640cf7a Implement inlined object allocation in Crankshaft. 
Generates inlined code for object allocation specific to the initial map
of the given constructor function. Also forces completion of inobject
slack tracking while crankshafting to finalize instance size of these
objects.

R=vegorov@chromium.org
TEST=mjsunit/compiler/alloc-object

Review URL: https://chromiumcodereview.appspot.com/9370019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10881 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-01 11:10:28 +00:00
ulan@chromium.org
25ab259f4c Prepare push to trunk. Now working on version 3.9.14. 
R=jkummerow@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9535010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10874 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 15:41:07 +00:00
jkummerow@chromium.org
773c306303 Profiler experiments: prevent self-optimization for V8 Extensions 
Review URL: https://chromiumcodereview.appspot.com/9535006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10873 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 15:08:02 +00:00
erik.corry@gmail.com
448d80db64 Fix stub cache on ARM, broken in 10864. 
Review URL: https://chromiumcodereview.appspot.com/9539010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10872 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 14:38:54 +00:00
yangguo@chromium.org
84eea3e531 Inline one level of recursive call of WriteToFlat for the common case of cons string list. 
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9536011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10871 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 14:25:24 +00:00
fschneider@chromium.org
b854d09721 Eliminate overflow check after integer add and sub operation if result is truncated to int32. 
Review URL: https://chromiumcodereview.appspot.com/9286002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10870 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 13:41:18 +00:00
yangguo@chromium.org
c5dbc7b2e1 Change test262 test expectations regarding inaccurate Math functions. 
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9533007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10869 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 13:31:10 +00:00
jkummerow@chromium.org
ea62dca70e Revert "Handle CALLBACKS correctly in IsProperty functions." 
This reverts r10847.

Review URL: https://chromiumcodereview.appspot.com/9536010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10868 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 13:29:17 +00:00
danno@chromium.org
a6963cdf7e Rewrite test CHECK to work on all platforms, including MIPS 
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9536005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10867 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 12:49:44 +00:00
rossberg@chromium.org
b89c0a962c AST extensions and parsing for import & export declarations. 
R=jkummerow@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9496003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10866 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 12:12:52 +00:00
vegorov@chromium.org
b4a0a4ddfe MIPS: Support fast case for-in in Crankshaft. 
Port r10794 (654fe910).

Original commit message:

Only JSObject enumerables with enum cache (fast case properties, no interceptors, no enumerable properties on the prototype) are supported.

HLoadKeyedGeneric with keys produced by for-in enumeration are recognized and rewritten into direct property load by index. For this enum-cache was extended to store property indices in a separate array (see handles.cc).

New hydrogen instructions:

- HForInPrepareMap: checks for-in fast case preconditions and returns map that contains enum-cache;
- HForInCacheArray: extracts enum-cache array from the map;
- HCheckMapValue: map check with HValue map instead of immediate;
- HLoadFieldByIndex: load fast property by it's index, positive indexes denote in-object properties, negative - out of object properties;

Changed hydrogen instructions:

- HLoadKeyedFastElement: added hole check suppression for loads from internal FixedArrays that are knows to have no holes inside.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9453009
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10865 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 12:05:58 +00:00
erik.corry@gmail.com
9f375ea880 Fix secondary stub cache and add a test for the stub cache lookups. 
Review URL: https://chromiumcodereview.appspot.com/9496010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10864 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 10:45:59 +00:00
fschneider@chromium.org
abffcbdd3e MIPS: Pass zone explicitly to zone-allocation on x64 and ARM. 
Port r10857 (87e52e7).

Original commit message:

This is a very mechanical change to reduce the number of calls to
Isolate::Current that come with every plain new-allocation.

BUG=
TEST=

Patch from Daniel Kalmar <kalmard@homejinni.com>.
Review URL: https://chromiumcodereview.appspot.com/9511003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10863 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 09:53:59 +00:00
mstarzinger@chromium.org
66a94223db MIPS: Implement inlining of constructor calls. 
Port r10849 (b0fe79c).

Also included: Fixed a bug in GenerateRecordCallTarget.

This bug prevented certain functions from being registered as Monomorphic
and thus prevented them from being inlined using the new system (b0fe79c).

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9511002
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10862 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-29 09:48:03 +00:00
ulan@chromium.org
20f2c9b645 Do not call memset() to initialize StubCache. 
Review URL: https://chromiumcodereview.appspot.com/9464054
Patch from Iliyan Malchev <malchev@google.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10861 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 18:26:04 +00:00
svenpanne@chromium.org
f9cdb0e18c Explicitly use a Zone when allocating Range. 
This CL is a step towards removing ZoneObject's new operator without a Zone
parameter, which uses Isolate::Current. For e.g. the bulletben benchmark, this
CL reduces the number of calls to this new operator by roughly 120k, but we are
still left with 780k calls from other sites...

Review URL: https://chromiumcodereview.appspot.com/9487010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10860 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 15:32:58 +00:00
svenpanne@chromium.org
22e66d395e Thread isolate through Property constructor, avoiding Isolate::Current. 
This removes roughly 5k invocations of Isolate::Current from the string-tagcloud
benchmark.

Review URL: https://chromiumcodereview.appspot.com/9490009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10859 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 15:32:06 +00:00
yangguo@chromium.org
59a7bdd6e2 Add code kind check before preparing for OSR. 
BUG=v8:1900, 115073

Review URL: https://chromiumcodereview.appspot.com/9495005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10858 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 12:59:00 +00:00
fschneider@chromium.org
15542081e9 Pass zone explicitly to zone-allocation on x64 and ARM. 
This is a very mechanical change to reduce the number of calls to
Isolate::Current that come with every plain new-allocation.

BUG=v8:1802
Review URL: https://chromiumcodereview.appspot.com/9491004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10857 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 10:53:13 +00:00
svenpanne@chromium.org
3df99e7eb7 Thread the current isolate through a few places, avoiding Isolate::Current(). 
This removes approx. 12k calls of Isolate::Current() in string-tagcloud.

Review URL: https://chromiumcodereview.appspot.com/9490004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10856 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 10:32:02 +00:00
mstarzinger@chromium.org
564a6f035a Port string construct stub to x64. 
R=yangguo@chromium.org
BUG=v8:849

Review URL: https://chromiumcodereview.appspot.com/9491005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10855 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 10:20:57 +00:00
rossberg@chromium.org
d809d17f5d Further refactoring of declarations in the AST: 
Define modules as module declarations.
Separate function declarations from var declarations.

R=jkummerow@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9460064

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10854 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 10:12:39 +00:00
ulan@chromium.org
ddaf909f82 Prepare push to trunk. Now working on version 3.9.13. 
R=yangguo@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9495004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10851 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 09:45:17 +00:00
mstarzinger@chromium.org
170511e52a Fix presubmit errors in previous revision. 
R=ulan@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9495003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10850 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 09:38:16 +00:00
mstarzinger@chromium.org
fb8eb04bfd Implement inlining of constructor calls. 
R=vegorov@chromium.org,kmillikin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9304001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10849 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 09:05:55 +00:00
erik.corry@gmail.com
a81b05af93 Fix the negative lookup stub to handle deleted entries in a 
dictionary.  This fixes http://code.google.com/p/v8/issues/detail?id=1964
"Closure-uri benchmark is sensitive to hash seed".
Review URL: https://chromiumcodereview.appspot.com/9463012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10848 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 08:32:44 +00:00
svenpanne@chromium.org
18ba22168e Handle CALLBACKS correctly in IsProperty functions. 
With transitions in AccessorPairs, it is not enough to look at the PropertyType
alone to decide whether we look at a property or not: For objects with
JavaScript accessors, we have to look into the AccessorPair itself and see if
one of its 2 parts is actually a JavaScript accessor. Therefore, a predicate
with a PropertyType argument alone doesn't make sense anymore, we might need the
associated value, too.

Things are complicated by the fact that the holder in a LookupResult can be
NULL, so we must be careful to retrieve its value only when it is really
needed. To achieve the needed call-by-name semantics, a new Entry is introduced,
which is basically a closure over a DescriptorArray and an index into this array
(C++0x to the rescue!). GCC is clever enough to inline this class, so we pay no
runtime penalty for this abstraction.

It's all a bit ugly, but this is caused by the current structure of Descriptor,
DescriptorArray and LookupResult: Things would be much easier if DescriptorArray
were, well, an array of Descriptors, and LookupResult were a 'Maybe Descriptor'
(in Haskell-terms).

Review URL: https://chromiumcodereview.appspot.com/9466047

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-28 07:16:50 +00:00
mikhail.naganov@gmail.com
2350d11dac Remove now unused CalculateExactRetainedSize function & co. 
This patch changes the signature of the v8::HeapGraphNode::GetRetainedSize method, but it's not used in Chromium, and it should be easy for other clients (if any) to adjust to this change.

BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/9466014
Patch from Alexei Filippov <alexeif@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10846 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 15:42:36 +00:00
vegorov@chromium.org
c112fdc398 Adds a new API where the host can supply a callback function. The callback function can resolve the location of a return address on stack to the location where a return-address rewriting profiler stashed the original return address. 
Review URL: https://chromiumcodereview.appspot.com/9401019
Patch from Sigurður Ásgeirsson <siggi@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10845 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 15:15:53 +00:00
vegorov@chromium.org
9b55ebaa3a When compiling for-in pass correct context value to the increment instruction. 
Additionally force increment instruction to use int32 representation.

R=fschneider@google.com
BUG=http://crbug.com/115646
TEST=test/mjsunit/compiler/optimized-for-in.js

Review URL: https://chromiumcodereview.appspot.com/9463052

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10844 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 14:37:27 +00:00
jkummerow@chromium.org
d5e252b157 MIPS: Profiler experiments: Fix debugger in the presence of self-optimization headers 
Port r10834 (0ce8cc524).

Note: this commit is a simple fix-up for FullCodeGenerator::self_optimization_header_size().

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9466050
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10843 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 14:24:08 +00:00
yangguo@chromium.org
32e2b0319e Update break points set with partial file name after compile. 
BUG=v8:1853

Review URL: https://chromiumcodereview.appspot.com/9460059

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10842 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 11:52:08 +00:00
yangguo@chromium.org
8adb1c4a2f Prepare push to trunk. Now working on version 3.9.12. 
R=ulan@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9455087

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10839 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 11:44:53 +00:00
vegorov@chromium.org
53622335e3 Disable for-in support in Crankshaft while crashes and regressions are being investigated. 
R=yangguo@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9463049

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10838 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 10:43:57 +00:00
jkummerow@chromium.org
64920e9ba6 Profiler experiments: fix snapshotting with count-based interrupts 
Review URL: https://chromiumcodereview.appspot.com/9447098

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10837 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 08:45:39 +00:00
jkummerow@chromium.org
610d179b08 Profiler experiments: Don't add self-optimization headers to functions that can't be optimized anyway 
Review URL: https://chromiumcodereview.appspot.com/9460058

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10836 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-27 08:11:04 +00:00