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1076 Commits

Author SHA1 Message Date
danno@chromium.org
8683920e3f Improve ==/=== comparison in Hydrogen for monomorphic maps 
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/108083004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18357 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-18 17:18:23 +00:00
jkummerow@chromium.org
59c334ebf4 Hydrogen: Re-use regular comparisons infrastructure for switch statements 
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/111573003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18348 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-18 11:58:58 +00:00
verwaest@chromium.org
fb7218dc3d Enable optimization of functions with generic switches. 
R=jkummerow@chromium.org, titzer@chromium.org

Review URL: https://chromiumcodereview.appspot.com/110123002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18347 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-18 11:44:38 +00:00
svenpanne@chromium.org
84aa5263f3 Remove the last remnants of the TranscendentalCache. 
It was only used for Math.log, and even then only in full code and in %_MathLog. For crankshafted code, Intel already used the FP operations directly, while the ARM/MIPS ports were a bit lazy and simply called the stub. The latter directly call the C library now without any cache. It would be possible to directly generate machine code if somebody has the time, from what I've seen out in the wild it should be only about a dozen instructions.

LOG=y
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/113343003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18344 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-18 10:40:26 +00:00
yurys@chromium.org
cd5ea74700 Replace 'operator*' with explicit 'get' method on SmartPointer 
Made operator* return reference to the raw type, not pointer. New method 'get()' should be used when raw pointer is needed.

Also removed useless inline modifier from the SmaprtPointer methods and added const modifier to the methods that don't change smart pointer.

Made ~SmartPointerBase protected to avoid accidental calls of the non-virtual base class's destructor.

drive-by: fixed use after free in src/factory.cc

BUG=None
LOG=N
R=alph@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/101763003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18275 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-09 07:41:20 +00:00
mvstanton@chromium.org
a1a871fb5a Remove unnecessary overflow check in HGraphBuilder::BuildCreateAllocationMemento(). 
With this fix codegen looks like:

mov ecx,[eax+0xf]  ;;; <@52,#38> load-named-field
add ecx,0x2  ;;; <@54,#40> add-i
mov [eax+0xf],ecx  ;;; <@56,#41> store-named-field

without it there is an overflow check and jump to deopt.

x64 code looks similar, except there is an (annoying) smi-untag then int32-to-smi around the add operation.

R=bmeurer@chromium.org, hpayer@chromium.org

Review URL: https://codereview.chromium.org/104313003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18255 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-04 10:46:18 +00:00
bmeurer@chromium.org
69b5d5f8f6 Revert "Use constant types to represent the fixed right arg of a MOD." 
This reverts commit r18246 for tanking all benchmarks.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/104243002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18249 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-04 09:27:48 +00:00
bmeurer@chromium.org
1868ef5de9 Use constant types to represent the fixed right arg of a MOD. 
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/103933002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18246 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-04 08:37:34 +00:00
bmeurer@chromium.org
7e540e6b8a Revert "Use constant types to represent the fixed right arg of a MOD." 
This reverts commit r18228 for crashing on Windows.

TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/101663002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18229 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-03 11:24:56 +00:00
bmeurer@chromium.org
5c6b9500aa Use constant types to represent the fixed right arg of a MOD. 
R=mvstanton@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/99173002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18228 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-03 10:51:57 +00:00
bmeurer@chromium.org
aa83f2900a Fix invalid assertion with OSR in BuildBinaryOperation. 
BUG=v8:3032
LOG=n
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/98623004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18190 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-02 13:12:07 +00:00
bmeurer@chromium.org
a3d1df29f1 Fix HInnerAllocatedObject to use an HValue for the offset. 
R=hpayer@chromium.org, mvstanton@chromium.org

Review URL: https://codereview.chromium.org/98673003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18181 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-12-02 11:24:31 +00:00
jkummerow@chromium.org
833ee3cdb7 A few small refactorings and typo fixes 
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/95333002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18153 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-29 10:02:32 +00:00
mstarzinger@chromium.org
b506e8ce96 Follow-up fix for r18135 in TryCallApply. 
R=yangguo@chromium.org
BUG=chromium:323942
TEST=mjsunit/regress/regress-crbug-323942
LOG=N

Review URL: https://codereview.chromium.org/95583002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18152 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-29 09:59:35 +00:00
titzer@chromium.org
6e5e23d630 Implement global check elimination using the HFlowEngine. 
BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/46883009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18137 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-28 15:50:54 +00:00
yangguo@chromium.org
f235194518 Fix bug in inlining Function.apply. 
R=jkummerow@chromium.org
BUG=323942
LOG=Y

Review URL: https://codereview.chromium.org/95123003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18135 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-28 15:30:17 +00:00
hpayer@chromium.org
0e95ffddf2 Fix allocation memento bookeeping code for js arrays. 
BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/95053002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18124 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-28 13:45:23 +00:00
hpayer@chromium.org
0213fc9035 Added tracing support for pretenuring. 
BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/94493002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18117 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-28 10:49:02 +00:00
mvstanton@chromium.org
f3a22f965e The goal is to discover the appropriate heap space for objects created in full 
code. By the time we optimize the code, we'll be able to decide on new or old
space based on the number of surviving objects after one or more gcs.

The mechanism is a "memento" placed behind objects in the heap. It's currently
done for array and object literals, with plans to use mementos for constructed
objects as well (in a later CL).

The feature is behind the flag allocation_site_pretenuring, currently off.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/40063002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18104 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-27 14:03:40 +00:00
dslomov@chromium.org
c3a4d718ce Generate TypedArrayInitialize builtin in hydrogen. 
R=danno@chromium.org

Review URL: https://codereview.chromium.org/59023003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18059 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-25 14:41:46 +00:00
mvstanton@chromium.org
81b22bbf96 A performance regression in array literal creation was caused by refactoring that eliminated a special fast case for shallow arrays. At the same time the general case got a bit slower. This CL restores most of the performance without coding the special fast case. The virtual dispatching is unnecessary because we know what we want to do at compile time. A flag was added to Runtime::CreateArrayLiteral. The flags delivers information about shallowness but also whether or not allocation mementos should be created. This is useful for crankshafted code. 
BUG=v8:3008
LOG=Y
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/77293003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18046 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-25 12:41:27 +00:00
dslomov@chromium.org
21dca31203 Safe HGraphBuilder::Add<> and New<> 
R=danno@chromium.org

Review URL: https://codereview.chromium.org/82943005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18033 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-22 19:05:21 +00:00
bmeurer@chromium.org
7158b51125 Fix combined string length computation. 
For 31-bit smis, we don't need to explicitly check whether the
combined string length exceeds the max supported string length,
since the value must be converted to a smi at some point (i.e.
when it is stored into the string length field of the resulting
string), which will emit an overflow check.

For 32-bit smis, we insert an explicit check that the combined
string length does not exceed String::kMaxLength.

This also enables to get rid of the JoinContinuation() usage in
BuildUncheckedStringAdd().

BUG=v8:2990
LOG=n
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/82733003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18005 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-22 12:03:01 +00:00
bmeurer@chromium.org
08df395f4e Get rid of the binop_stub parameter to BuildBinaryOperation(). 
Just ask the graph builder whether we are compiling a stub.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/83073003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18004 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-22 11:49:04 +00:00
svenpanne@chromium.org
b6b84c02b2 Reland "Implement Math.random() purely in JavaScript" plus fixes. 
The main change is that a bit has been added to array buffers to
signal that the backing store has to be freed when the buffer dies.

BUG=316359
LOG=Y
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/82763005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18003 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-22 11:35:39 +00:00
bmeurer@chromium.org
da87c188ad Rework BuildCheckString() to be compatible with the other BuildCheck*() methods. 
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/79343009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17985 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-22 07:27:26 +00:00
danno@chromium.org
8e266c2244 Revert 17963, 17962 and 17955: Random number generator in JS changes 
Revert 17966, 17965 also as collateral damage: Embed trigonometric lookup table.

Due to Heapcheck and valgrind failures that are not yet fixed.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/80513004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17981 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-21 17:21:00 +00:00
svenpanne@chromium.org
2b1da67263 Implement Math.random() purely in JavaScript. 
This removes tons of architecture-specific code and makes it easy to
experiment with other pseudo-RNG algorithms. The crankshafted code is
extremely good, keeping all things unboxed and doing only minimal
checks, so it is basically equivalent to the handwritten code.

When benchmarks are run without parallel recompilation, we get a few
percent regression on SunSpider's string-validate-input and
string-base64, but these benchmarks run so fast that the overall
SunSpider score is hardly affected and within the usual jitter. Note
that these benchmarks actually run even faster when we don't
crankshaft at all on the main thread (the regression is not caused by
bad code, it is caused by Crankshaft needing a few hundred microsecond
for compilation of a trivial function). Luckily, when parallel
recompilation is enabled, i.e. in the browser, we see no regression at
all!

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/68723002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17955 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-21 09:55:15 +00:00
bmeurer@chromium.org
d38abc3bba Remove the first_right_arg hack for HMod. 
Generate a proper subgraph in BuildBinaryOperation instead.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/77053003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17919 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-20 12:43:33 +00:00
bmeurer@chromium.org
4c4d911cde Convert constant numbers at compile time. 
TEST=mjsunit/number-tostring
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/77553005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17917 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-20 12:35:21 +00:00
bmeurer@chromium.org
defee14d76 Make BuildBinaryOperation use ReturnValue instead of ReturnInstruction. 
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/78183002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17914 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-20 12:00:57 +00:00
bmeurer@chromium.org
6826b74708 Replace unsafe uses of Add<> with AddUncasted<>. 
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/78213002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17913 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-20 11:57:49 +00:00
bmeurer@chromium.org
da6d5586f9 Don't generate useless string checks for string adds. 
If we know that one side of a string add is definitely a string
(i.e. if it's a string constant), then we don't need to emit a
string check for the argument.

This adds a new BuildCheckString() method to the graph builder,
which does "the right thing".

TEST=mjsunit/string-add
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/78063002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17912 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-20 11:53:09 +00:00
danno@chromium.org
06c7620302 Fixed crashes exposed though fuzzing. 
The %_OneByteSeqStringSetChar intrinsic expects its arguments to be checked before being called for efficiency reasons, but the fuzzer provided no such checks. Now the intrinsic is robust to bad input if FLAG_debug_code is set.

R=yangguo@chromium.org
TEST=test/mjsunit/regress/regress-320948.js
BUG=chromium:320948
LOG=Y

Review URL: https://codereview.chromium.org/72813004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17886 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-19 16:41:07 +00:00
yangguo@chromium.org
e2563d7a8e Make number of available threads isolate-dependent and expose it to ResourceConstraints. 
R=svenpanne@chromium.org
BUG=v8:2991
LOG=Y

Review URL: https://codereview.chromium.org/68203029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17866 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-19 11:52:47 +00:00
ishell@chromium.org
53bd540ee0 Constant-folding through HForceRepresentation fix. 
Reverts changes in HValue::IsInteger32Constant() made in https://code.google.com/p/v8/source/detail?r=17787

R=bmeurer@chromium.org, mvstanton@chromium.org

Review URL: https://codereview.chromium.org/68493005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17863 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-19 11:41:04 +00:00
vegorov@chromium.org
0ec0d5fc32 Reapply r11765 
Add static_cast<int> in HPositionInfo::position to please Win64 build.

Improvements in positions handling in optimizing compiler.

- When building binary arithmetic op and comparison restore source position of the operation itself before building operation itself after it was changed by building operands. This ensures that position recorded for operation points to the operation token instead of pointing to the rightmost operand;

- Add support for recording operands' positions and use these positions when inserting HChange instructions;

- When generating hydrogen.cfg emit H-instruction position as BCI (previously 0 was emitted), additionally on every lithium instruction emit annotation pointing to corresponding hydrogen-instruction. This allows to easily reach from deopt_id to lithium instruction and from it to hydrogen instruction and source position.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/59703011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17848 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-18 17:24:00 +00:00
dslomov@chromium.org
99133912bd Generate DataViewInitialize built-in in hydrogen. 
R=bmeurer@chromium.org, mvstanton@chromium.org

Review URL: https://codereview.chromium.org/66843011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17831 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-18 13:57:49 +00:00
danno@chromium.org
4ed2538262 Generate KeyedLoadDictionaryElementStub with Hydrogen 
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/19492007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17804 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-15 17:53:35 +00:00
mvstanton@chromium.org
5b9569b574 Regression fix: HForceRepresentation shouldn't be an idef. 
Instead, code sites that are interested in underlying constant integer values
should use HValue::IsInteger32Constant(). The issue is that the infer representation phase shouldn't "see through" HForceRepresentation nodes to an underlying, and less specific representation.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/65643003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17787 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-15 12:10:59 +00:00
verwaest@chromium.org
341d405301 Reland and fix "Add support for keyed-call on arrays of fast elements" 
BUG=
R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/71783003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17782 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-15 10:52:05 +00:00
danno@chromium.org
d62337e127 Add ability to do "else-if" clauses in IfBuilder 
- In an Else block it's possible to add more If<>'s in the same builder that are
  treated as an else if.
- Simplified and cleaned-up some of the IfBuilder's internals.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/66983002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17780 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-15 10:36:02 +00:00
bmeurer@chromium.org
2ee5aa951c Fix missing type feedback check for Generic*String addition. 
TEST=mjsunit/regress/regress-crbug-318671
BUG=318671
LOG=y
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/67473007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17772 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-15 09:13:36 +00:00
rafaelw@chromium.org
25b450b2b7 Revert "Improvements in positions handling in optimizing compiler." (r17765) 
Original issue: https://codereview.chromium.org/49203002/

TBR=vegorov

Review URL: https://codereview.chromium.org/63343003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17768 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-14 21:45:01 +00:00
vegorov@chromium.org
9d440ac4c0 Improvements in positions handling in optimizing compiler. 
- When building binary arithmetic op and comparison restore source position of the operation itself before building operation itself after it was changed by building operands. This ensures that position recorded for operation points to the operation token instead of pointing to the rightmost operand;

- Add support for recording operands' positions and use these positions when inserting HChange instructions;

- When generating hydrogen.cfg emit H-instruction position as BCI (previously 0 was emitted), additionally on every lithium instruction emit annotation pointing to corresponding hydrogen-instruction. This allows to easily reach from deopt_id to lithium instruction and from it to hydrogen instruction and source position.

BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/49203002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17765 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-14 21:00:27 +00:00
machenbach@chromium.org
eef8694a7e [Sheriff] Revert "Add support for keyed-call on arrays of fast elements" 
This reverts commit r17746 for breaking layout tests.

TBR=verwaest@chromium.org
BUG=

Review URL: https://codereview.chromium.org/72753002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17751 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-14 15:00:13 +00:00
verwaest@chromium.org
607a175cbc Add support for keyed-call on arrays of fast elements 
R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23537067

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17746 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-14 13:46:18 +00:00
mvstanton@chromium.org
3cf157b43b Inline zero argument array constructor. 
patch from issue 54583003 (dependent code).

Zero arguments - very easy

1 argument - three special cases:
  a) If length is a constant in valid array length range,
     no need to check it at runtime.
  b) respect DoNotInline feedback on the AllocationSite for
     cases that the argument is not a smi or is an integer
     with a length that should create a dictionary.
  c) if kind feedback is non-holey, and length is non-constant,
     we'd have to generate a lot of code to be correct.
     Don't inline this case.

N arguments - one special case:
  a) If a deopt ever occurs because an input argument isn't
     compatible with the elements kind, then set the
     DoNotInline flag.

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/55933002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17741 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-14 12:05:09 +00:00
mvstanton@chromium.org
026c5507bd Make HForceRepresentation an idef. 
An optimization in the array constructor wasn't firing because the code
would check for constant values, failing to find them through
intervening HForceRepresentation instructions. Repaired this site. A
follow-on CL will provide a better way of making decisions based on
constant HValues.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/59623009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17708 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-13 17:03:11 +00:00
yangguo@chromium.org
e83fd01ce6 Reland "Implement Math.sin, cos and tan using table lookup and spline interpolation." 
This relands r17594 with necessary fixes.

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/70003004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17654 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-12 14:43:18 +00:00
yangguo@chromium.org
df9665032e Introduce %_IsMinusZero. 
R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/63423004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17639 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-12 11:53:13 +00:00
bmeurer@chromium.org
6f75e92902 Add initial hydrogenized NewStringAddStub. 
The new stub is enabled via the --new-string-add flag, which is
disabled by default. For now, it's only a stripped down version
of the native StringAddStub, it's still work-in-progress.

BUG=v8:2990
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/61893009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17635 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-12 10:21:08 +00:00
ulan@chromium.org
bc4ad49b25 Do not add values to HGraph in Lithium. 
Lithium uses indexes after the maximium value ID in the HGraph as indexes
of virtual registers and assumes that the maximum value ID does not change.

The IsStandardConstant and GetConstantXX functions could add constants to
HGraph, which aliased virtual registers with real values. This could confuse
the register allocator to think that a value in a virtual register is tagged
and to incorrectly set it in the pointer map.

BUG=298269
TEST=mjsunit/regress/regress-298269.js
R=verwaest@chromium.org

Review URL: https://chromiumcodereview.appspot.com/66693002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17599 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-08 14:16:34 +00:00
yangguo@chromium.org
9f104a1a3e Revert "Implement Math.sin, cos and tan using table lookup and spline interpolation." 
This reverts commit r17594.

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/59153007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17596 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-08 13:44:27 +00:00
yangguo@chromium.org
063b7c4ebb Implement Math.sin, cos and tan using table lookup and spline interpolation. 
R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/50563003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17594 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-08 13:10:39 +00:00
yangguo@chromium.org
fc1dadce9b Use register allocator for context on x64. 
BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/50863002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17585 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-08 10:58:51 +00:00
mstarzinger@chromium.org
acac89008d Defer allocation of constant literal properties. 
This moves building of constant properties and elements arrays for all
materialized literals into the compiler. The parser no longer allocates
while parsing ObjectLiteral and ArrayLiteral expressions.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/61873003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17557 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-07 12:08:37 +00:00
mvstanton@chromium.org
cec8548d0e Correct handling of arrays with callbacks in the prototype chain. 
Our generic KeyedStoreIC doesn't handle the case when a callback is
set on array elements in the prototype chain of the object, nor do
we recognize that we need to avoid the monomorphic case if these
callbacks exist.

This CL addresses the issue by looking for dictionary elements in
the prototype chain on IC misses and crankshaft element store
instructions. When found, the generic IC is used. The generic IC is
changed to go to the runtime in this case too.

In general, keyed loads are immune from this problem because they
won't return the hole: discovery of the hole goes to the runtime where
the callback will be found in the prototype chain. Double array loads
in crankshaft can return the hole but only if the prototype chain is
unaltered (we will catch such alterations).

Includes the following patch as well (already reviewed by bmeurer):
Performance regression found in test regress-2185-2.js. The problem was
that the bailout method for TransitionAndStoreStub was not performing
the appropriate transition.

(Review URL for the ElementsTransitionAndStoreIC_Miss change:
https://codereview.chromium.org/26911007)

R=danno@chromium.org

Review URL: https://codereview.chromium.org/35413006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17525 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-06 15:45:43 +00:00
mvstanton@chromium.org
ee6e52f292 Remove CreateArrayLiteralShallow, as it's fundamentally the same now as 
CreateArrayLiteral.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/54333003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17470 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-05 09:54:59 +00:00
bmeurer@chromium.org
537100336c Do Else() first for JoinContinuation() in IfBuilder. 
This is required to make sure that environments are correct
for joined continuations.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/52593008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17464 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-11-05 08:56:48 +00:00
plind44@gmail.com
c042ef360d Enable double alignment for constructed arrays. 
2nd (of 3) CL's to ensure complete alignment of FixedDoubleArrays.

TEST=
BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/35133002

Patch from Dusan Milosavljevic <Dusan.Milosavljevic@rt-rk.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17382 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-24 19:01:30 +00:00
jkummerow@chromium.org
8259439ae8 Fix HObjectAccess for loads from migrating prototypes 
BUG=chromium:305309
R=danno@chromium.org

Review URL: https://codereview.chromium.org/35173005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17345 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-23 15:15:15 +00:00
ishell@chromium.org
bf7a9bf8dc HCheckInstanceType factories unified 
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/35413007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17342 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-23 13:03:15 +00:00
ishell@chromium.org
a333094165 PushAndAdd() usages refactored. 
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/36893002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17339 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-23 12:34:39 +00:00
hpayer@chromium.org
fbaf016b6d Add a soft-deopt in keyed element access when current IC is pre-monomorphic and no type feedback was collected. 
BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/32643004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17335 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-23 10:41:21 +00:00
dcarney@chromium.org
6eeb141a37 force accessor pair accesses backed by simple api calls to be generic accesses when crankshafted 
R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/34773003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17332 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-23 08:46:46 +00:00
bmeurer@chromium.org
32d96248f9 Guard against misuse of IfBuilder. 
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/30693007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17319 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-22 11:37:15 +00:00
ishell@chromium.org
32cdd4d48a More Hydrogen templatization. 
Factories added to a set of Hydrogen classes.
Several old-style HXxx::New() replaced with New<HXxx>() and NewUncasted<HXxx>.
Several AddInstruction() calls following New::XXX() replaced with Add<XXX>().
AddLoadNamedField() method added to GraphBuilder.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/34523004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17318 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-22 11:29:05 +00:00
titzer@chromium.org
d63c8e4dc3 Allow constants to be deleted by reinserting them into the graph as needed. 
BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/31943002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17299 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-21 14:09:32 +00:00
danno@chromium.org
4c565138b5 Add tool to visualize machine code/lithium. 
In the process:
- Add a command-line flag --opt-code-positions to track source position information throughout optimized code.
- Add a subclass of the hydrogen graph builder to ensure that the source position is properly set on the graph builder for all generated hydrogen code.
- Overhaul handling of source positions in hydrogen to ensure they are passed through to generated code consistently and in most cases transparently.

Originally reviewed in this CL: https://codereview.chromium.org/24957003/

Review URL: https://codereview.chromium.org/29123008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17295 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-21 13:35:48 +00:00
bmeurer@chromium.org
100fb55555 Inline number to string conversion for string addition into BinaryOp(Stub). 
This fixes a performance regression that was caused by converting the
BinaryOpStub to a Hydrogen code stub. It also fixes a leftover TODO wrt.
the handling of Number*String or String*Number versions of the stub.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/27674002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17290 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-21 12:42:08 +00:00
bmeurer@chromium.org
ef12527b7c Revert "Add a soft-deopt in keyed element access when current IC is pre-monomorphic and no type feedback was collected." 
This reverts commit r17288 for breaking the mjsunit/unbox-double-arrays
test on almost every platform.

TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/32373002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17289 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-21 12:32:38 +00:00
hpayer@chromium.org
9667e1b30f Add a soft-deopt in keyed element access when current IC is pre-monomorphic and no type feedback was collected. 
BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/32263002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17288 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-21 12:10:01 +00:00
mvstanton@chromium.org
8f9f192f6e AllocationSites for all literals 
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/24250005


Review URL: https://codereview.chromium.org/27366003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17228 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-16 08:10:36 +00:00
mvstanton@chromium.org
f4edc076d8 Revert "AllocationSites for all literals" 
This reverts commit r17219 due to WebKit failures.

R=mstarzinger@chromium.org
TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/26539010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17222 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-15 15:35:23 +00:00
jkummerow@chromium.org
ea4e0a3d28 Simplify array element access in Hydrogen. 
No change in functionality intended.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/26986004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17221 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-15 15:06:04 +00:00
mvstanton@chromium.org
362c0cfbca AllocationSites for all literals 
BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/24250005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17219 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-15 14:52:58 +00:00
jkummerow@chromium.org
1d580b4fd0 Delete dead code from HOptimizedGraphBuilder::VisitCompareOperation 
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/26419005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17214 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-15 11:24:37 +00:00
rossberg@chromium.org
c806a2385d Unify handling of position info in AST, part 3 
* Turn CaseClause into a proper AstNode

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23684058

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17187 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-14 11:06:15 +00:00
mvstanton@chromium.org
71af6c86a1 Allow FastCloneShallowObjectStub to use AllocationMementos. 
(currently turned off)

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/26827002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17154 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-11 09:25:14 +00:00
dslomov@chromium.org
12250f23d8 Add instruction factories to HHasInstanceTypeAndBranch. 
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/26859003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17150 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-10 20:01:42 +00:00
olivf@chromium.org
66c610398f Reland "Hydrogenisation of binops" 
BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/25494007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17104 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-04 08:17:11 +00:00
olivf@chromium.org
24c2336d75 Inline some more compare operations. 
BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/25009003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17091 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-02 18:15:57 +00:00
verwaest@chromium.org
41f660fe07 Rename ComputeLoadStoreField to just handle ComputeStoreField. 
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/25683005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17086 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-02 17:17:00 +00:00
danno@chromium.org
79a14d3f73 Fix failure in unit tests 
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/25665006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17083 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-02 16:13:49 +00:00
danno@chromium.org
d4bcf5d730 Fix test262 failures and x64 compile failure. 
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/25604008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17082 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-02 15:27:51 +00:00
verwaest@chromium.org
7e0ea6ab46 Only fold polymorphic into monomorphic load if all load from either receiver or same prototype. 
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/25718002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17078 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-02 13:24:08 +00:00
danno@chromium.org
908a7dc2a8 Improve and simplify removal of unreachable code 
- Detect unreachable basic blocks of code either following an unconditional deopt or after a provably untaken branch of HBranch or HCompareObjectEqAndBranch instructions.
- Emit dummy uses in unreachable blocks during Hydrogen -> Lithium translation.

BUG=chromium:258519
R=jkummerow@chromium.org, mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/22876009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17073 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-02 11:43:41 +00:00
palfia@homejinni.com
4b9a9f7af7 MIPS: Allow function inlining with context change. 
Port r17019 (cd4b69cd)

BUG=
R=jkummerow@chromium.org, plind44@gmail.com

Review URL: https://codereview.chromium.org/25622003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17070 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-02 11:25:06 +00:00
olivf@chromium.org
9459ed3ab4 Revert "Hydrogenisation of binops" 
This reverts r17052-17054 for various build breaks.

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/25571002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17055 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-01 18:00:02 +00:00
olivf@chromium.org
7873f35eb2 Hydrogenisation of binops 
BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/24072013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17052 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-01 15:24:56 +00:00
mstarzinger@chromium.org
b9b528e030 Defer allocation of native function literals. 
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/25473002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17038 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-01 09:47:37 +00:00
mvstanton@chromium.org
aa90e62ba0 In crankshafted code, we were creating allocation mementos for shallow 
SMI array literals when we shouldn't. The idea is that we should have learned
by this point what type of array we'll end up with.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/25146007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17028 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-10-01 08:22:01 +00:00
jkummerow@chromium.org
85ae341b09 Revert "Defer allocation of native function literals." 
This reverts r17017 for breaking LayoutTests.

R=mstarzinger@chromium.org
TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/25315002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17024 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-09-30 17:42:58 +00:00
rodolph.perfetta@gmail.com
e7669d9308 ARM: Allow function inlining with context change. 
BUG=none
TEST=none
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/25247002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17019 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-09-30 15:08:20 +00:00
mstarzinger@chromium.org
c624141bf3 Defer allocation of native function literals. 
R=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/25164003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17017 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-09-30 14:49:11 +00:00
yangguo@chromium.org
2dec4372d8 Finish control flow after throw if not inlined. 
R=jkummerow@chromium.org
BUG=v8:2868

Review URL: https://codereview.chromium.org/24768002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16992 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-09-27 13:48:19 +00:00
mvstanton@chromium.org
807cdd492b Refactoring such that loop builders only call into the HOsrBuilder if 
compiling for OSR.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/25039003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16990 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-09-27 13:38:04 +00:00
titzer@chromium.org
d441160cab Implement local check elimination on basic blocks. 
BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23866016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16970 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-09-26 16:25:57 +00:00
olivf@chromium.org
9d3c5c5fb6 Macrofication of HInstruction constructors with context argument. 
BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/24544002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16940 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2013-09-25 11:57:20 +00:00