Commit Graph

8843 Commits

Author SHA1 Message Date
yangguo@chromium.org
13e4b7d881 Force inlining CopyChars and String::Get.
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10332054

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11527 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-08 12:38:24 +00:00
erik.corry@gmail.com
9889994c08 Fix function sorter from 11482 with correct fix. The sorter
was reverted from trunk 3.10.8.1, with this change we can
repush it.
Review URL: https://chromiumcodereview.appspot.com/10377043

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11526 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-08 12:30:36 +00:00
erik.corry@gmail.com
681f2951c6 Regexp: Fix overflow in min-match-length calculation. Crbug=126412.
Review URL: https://chromiumcodereview.appspot.com/10384053

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11525 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-08 12:18:08 +00:00
erik.corry@gmail.com
29c48e1076 Make DeltaBlue performance more stable by ignoring type feedback that
tells us that a map can transition to another map when we are generating
code for load operations.  This may cause us to deopt if the same routine
is seeing different maps caused by branching in constructors.  If so, I
have a different change that is around 100 times more complicated that
lets us generated Crankshaft code for negative lookups.
Review URL: https://chromiumcodereview.appspot.com/10306010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11524 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-08 09:22:58 +00:00
yangguo@chromium.org
2cb65b13be MIPS: Fixed illegal instruction use on Loongson in code for Math.random().
BUG=v8:2115
TEST=mjsunit/string-case,mjsunit/regress/regress-110509,mjsunit/math-floor

Review URL: https://chromiumcodereview.appspot.com/10383044
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11523 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-07 17:31:14 +00:00
erik.corry@gmail.com
80256c7452 Fix crash bug in VisitChoice (bug=126272).
Review URL: https://chromiumcodereview.appspot.com/10332035

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11519 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-07 13:23:56 +00:00
jkummerow@chromium.org
63263a9aa9 Fix unsigned-Smi check in MappedArgumentsLookup
BUG=126414
TEST=mjsunit/regress/regress-crbug-126414

Review URL: https://chromiumcodereview.appspot.com/10375033

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11518 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-07 10:05:39 +00:00
yangguo@chromium.org
718ec5eb64 Handle negative number in Math.floor,ia32,non-SSE4.1 code path.
Zheng Liu
zheng.z.liu@intel.com

Review URL: https://chromiumcodereview.appspot.com/10168001
Patch from Zheng Liu <zheng.z.liu@intel.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11517 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-04 15:50:43 +00:00
yangguo@chromium.org
05c195bd96 Intercept a crash, put debug information onto the stack and then abort gracefully.
BUG=125128
TEST=

Review URL: https://chromiumcodereview.appspot.com/10375009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11516 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-04 13:20:41 +00:00
ulan@chromium.org
ae0a7ec93a Use correct size of promoted space for setting promotion and allocation limits.
Review URL: https://chromiumcodereview.appspot.com/10376008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11513 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-04 09:36:46 +00:00
mstarzinger@chromium.org
11d24334fc Implement ClearFunctionTypeFeedback for test cases.
R=danno@chromium.org
TEST=mjsunit/compiler/inline-construct

Review URL: https://chromiumcodereview.appspot.com/10332010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11509 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-04 09:16:38 +00:00
danno@chromium.org
9f75aa3d7b MIPS: ARM: Ensure reload of elements pointer in StoreFastDoubleElement stub
Port r11483 (c291e80e)

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10348016
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11507 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-04 09:07:22 +00:00
mstarzinger@chromium.org
a5a5f26ebb MIPS: Fix register clobbering in LoadIC for interceptors.
Port r11492 (d14ada19)

Original commit message:
Fix register clobbering in LoadIC for interceptors.

This fixes a corner-case where the receiver register was clobbered by
LoadICs for interceptors and inlined followup code still relied on the
receiver to be intact in case of prototype changes.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10315016
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11506 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-04 08:34:59 +00:00
mstarzinger@chromium.org
6531771c71 MIPS: Implement clearing of CompareICs.
Port r11491 (705d40cc)

Original commit message:
Implement clearing of CompareICs.

This allows CompareICs to be cleared during garbage collection to avoid
cross-context garbage retention through maps stored in CompareIC stubs
for the KNOWN_OBJECTS state.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10342024
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11505 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-04 07:53:11 +00:00
peter.rybin@gmail.com
a33c883008 Fix warning on Win64
Review URL: https://chromiumcodereview.appspot.com/10372003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11504 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 22:19:12 +00:00
peter.rybin@gmail.com
885c142d24 Fix mjsunit.status for new liveedit test
Review URL: https://chromiumcodereview.appspot.com/10353016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11503 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 18:53:40 +00:00
peter.rybin@gmail.com
1719a1499a Fix issue 825 (LiveEdit vs. function with no locals) in core and for ia32.
Review URL: https://chromiumcodereview.appspot.com/10263002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11502 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 17:31:34 +00:00
danno@chromium.org
e443c69b8d MIPS: Reduce size of LIR instruction by one word and remove dead code.
Port r11454 (72c662fc)

Original commit message:
Reduce size of LIR instruction by one word and remove dead code.

Until now we always recorded two deoptimization environments for instructions
that are marked as calls. We actually don't need two for all LIR
instructions except one (LInstanceOfKnownGlobal) where there is a lazy
deoptimization point in deferred code.

This change remove on of them and uses one virtual function instead
to make LInstanceOfKnownGlobal work as before.

Additionally, this change removes an unused predicate save_doubles_ from LIR
instructions and removes some helper functions that are used only in one place.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10233019
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11501 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 15:13:04 +00:00
svenpanne@chromium.org
b8c63a576e Bumped bootup memory limit on 32bit platforms using snapshot.
Somehow the mmaps we do look the same, but the info in the proc FS tells us that
we use a bit more memory. I am not sure if this is a real issue or not, but this
CL should at least get the build bots green again...

TBR=erik.corry@gmail.com
TEST=cctest/test-mark-compact/BootUpMemoryUse

Review URL: https://chromiumcodereview.appspot.com/10342016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11500 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 14:31:20 +00:00
erik.corry@gmail.com
f54484aff4 Fix assert in function sorter.
Review URL: https://chromiumcodereview.appspot.com/10364002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11497 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 14:09:26 +00:00
svenpanne@chromium.org
065cc14449 Use map transitions when defining accessor properties.
AccessorPairs can now contain map transitions, which is similar to our current
handling of CONSTANT_FUNCTION/CONSTANT_TRANSITION, but generalized to a pair for
holding info about the getter and the setter. This way we can achieve map
sharing for objects with accessor properties, which is a prerequisite for making
them fast via inlining. We fall back to the previous way of handling accessor
properties when sharing is not possible or we don't handle a special case.

Note: When an exisiting accessor property is redefined we could in principle
move the AccessorPair out of the descriptor into the object itself (again just
like the way we do something similar for CONSTANT_FUNCTION/CONSTANT_TRANSITION),
but this would require a new property kind for holding a pair of values. Perhaps
we can implement this later, but for now this hopefully rare case is handled
like before, losing map sharing and potentially creating more maps than strictly
necessary.

Review URL: https://chromiumcodereview.appspot.com/10238005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11496 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 12:41:40 +00:00
yangguo@chromium.org
b42ab19d2e Modify two regression tests to actually fail when failing.
BUG=
TEST=regress-1639, regress-1639-2

Review URL: https://chromiumcodereview.appspot.com/10315009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11493 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 11:52:56 +00:00
mstarzinger@chromium.org
d965561862 Fix register clobbering in LoadIC for interceptors.
This fixes a corner-case where the receiver register was clobbered by
LoadICs for interceptors and inlined followup code still relied on the
receiver to be intact in case of prototype changes.

R=vegorov@chromium.org
BUG=chromium:125988
TEST=cctest/test-api/Regress125988

Review URL: https://chromiumcodereview.appspot.com/10358010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11492 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 11:28:24 +00:00
mstarzinger@chromium.org
c810016e77 Implement clearing of CompareICs.
This allows CompareICs to be cleared during garbage collection to avoid
cross-context garbage retention through maps stored in CompareIC stubs
for the KNOWN_OBJECTS state.

R=vegorov@chromium.org
BUG=v8:2102

Review URL: https://chromiumcodereview.appspot.com/10263008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11491 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 10:54:17 +00:00
danno@chromium.org
7f5920dc94 Prepare push to trunk. Now working on version 3.11.0.
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10354006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11488 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 09:02:57 +00:00
erik.corry@gmail.com
baf7ebd6da Fix assert triggered in fast/regex/pcre-test-4.html We were not filtering out
all the nodes that had non-ASCII characters.  That has been fixed, but because
of the protection against over-deep recursion when filtering it is wrong to
assert that all nodes were filtered.  This change therefore also makes sure we
can cope with non-filtered nodes by adding back some code removed in
https://chromiumcodereview.appspot.com/10174017/
Review URL: https://chromiumcodereview.appspot.com/10358008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11487 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 08:22:12 +00:00
jkummerow@chromium.org
10b0eee0d0 Clean up Makefile, enable MIPS cross-compilation
Review URL: https://chromiumcodereview.appspot.com/10268010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11486 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 08:11:38 +00:00
danno@chromium.org
eb05917323 ARM: Ensure reload of elements pointer in StoreFastDoubleElement stub
R=mstarzinger@chromium.org
TEST=test/mjsunit/regress/regress-125515.js
BUG=chromium:125515

Review URL: https://chromiumcodereview.appspot.com/10298010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11483 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-03 07:09:17 +00:00
erik.corry@gmail.com
cb8df6e624 Sort functions when doing megamorphic dispatch/inlining so their
order does not depend on the hash seed.
Review URL: https://chromiumcodereview.appspot.com/10270032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11482 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-02 13:07:31 +00:00
erik.corry@gmail.com
bd3c2c028f Enable code flushing even when objects were marked incrementally,
since the incremental visitor is setting the gc_age fields correctly.
This means the ResetSharedFunctionInfoCountersDuringIncrementalMarking
test passes even if it hits a marking stack overflow.
Review URL: https://chromiumcodereview.appspot.com/10258001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11481 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-02 12:58:40 +00:00
yangguo@chromium.org
ce8f4df9b2 Small patch to save one jump instruction and one label bind in JSEntryStub.
BUG=v8:2105
TEST=

Review URL: https://chromiumcodereview.appspot.com/10249003
Patch from Zhongping Wang <kewpie.w.zp@gmail.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11480 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-02 12:13:39 +00:00
danno@chromium.org
908e77a53a Ensure reload of elements pointer in StoreFastDoubleElement stub.
R=mstarzinger@chromium.org
TEST=test/mjsunit/regress/regress-125515.js
BUG=chromium:125515

Review URL: https://chromiumcodereview.appspot.com/10260014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11479 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-02 09:58:42 +00:00
mstarzinger@chromium.org
2c64592065 MIPS: Fix LFastLiteral to check boilerplate elements kind.
Port r11470 (621f96c0)

Original commit message:
Fix LFastLiteral to check boilerplate elements kind.

Adds a missing check that the elements kind of the boilerplate object
still has the expected elements kind, unoptimized code can transition
the boilerplate. Corner cases might cause the optimized code to be
reentered again.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10271018
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11474 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-05-02 07:51:03 +00:00
jkummerow@chromium.org
0133965d1b Fix mistakes in r11472
TBR=vegorov@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10274008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11473 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 17:06:13 +00:00
jkummerow@chromium.org
f6dacfe83a Fixed corner cases in truncation behavior when storing to TypedArrays.
Also simplified ia32 KeyedStoreStubCompiler::GenerateStoreExternalArray a bit.

BUG=v8:2110
TEST=mjsunit/regress/regress-2110

Review URL: https://chromiumcodereview.appspot.com/10260011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11472 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 15:17:59 +00:00
vegorov@chromium.org
49989753ea Don't ignore return value of CommitCodePage in AllocateAlignedMemory.
Release the mapping as whole if commit failed to avoid leaking virtual address space.

R=mstarzinger@chromium.org
BUG=chromium:118625

Review URL: https://chromiumcodereview.appspot.com/10260012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11471 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 15:02:43 +00:00
mstarzinger@chromium.org
b54ca31fb2 Fix LFastLiteral to check boilerplate elements kind.
Adds a missing check that the elements kind of the boilerplate object
still has the expected elements kind, unoptimized code can transition
the boilerplate. Corner cases might cause the optimized code to be
reentered again.

R=danno@chromium.org
TEST=mjsunit/regress/regress-fast-literal-transition

Review URL: https://chromiumcodereview.appspot.com/10254006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11470 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 14:59:13 +00:00
ulan@chromium.org
bc46d6c4a4 Make sure idle notifications perform a round of incremental GCs after context disposal.
BUG=v8:2107

Review URL: https://chromiumcodereview.appspot.com/10209026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11469 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 14:41:12 +00:00
svenpanne@chromium.org
6aceff1fa9 Fixed preparser for try statement. Tiny cleanup.
BUG=v8:2109
TBR=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10270007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11468 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 13:04:08 +00:00
danno@chromium.org
a1fe6f3b58 Prepare push to trunk. Now working on version 3.10.8.
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10268006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11465 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 12:32:11 +00:00
ulan@chromium.org
8768af54b6 Revert r11425 because of V8 benchmark performance regression.
Original CL: https://chromiumcodereview.appspot.com/10202007 "Re-enable optimization for hot functions that have optimization disabled due to many deopts."

Review URL: https://chromiumcodereview.appspot.com/10265008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11464 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 11:54:34 +00:00
jkummerow@chromium.org
347d28f282 One more register change missing from r11460.
Also re-enable disabled test (reverts r11461).

BUG=v8:2108
TEST=mozilla tests pass

Review URL: https://chromiumcodereview.appspot.com/10178039

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11463 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-30 08:53:48 +00:00
jkummerow@chromium.org
cb95d208fb Temporarily disable crashing mozilla test
BUG=2108

Review URL: https://chromiumcodereview.appspot.com/10252008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11461 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-27 17:29:22 +00:00
jkummerow@chromium.org
28bf8bfc4b ia32: Redefine register usage in LoadIC/KeyedLoadIC to match StoreIC and KeyedStoreIC
Review URL: https://chromiumcodereview.appspot.com/10254005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11460 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-27 13:05:45 +00:00
yangguo@chromium.org
03e8d039ca MIPS: Removed unused variables.
These were found by compilation errors with gcc 4.6.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10253004
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11459 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-27 12:57:01 +00:00
peter.rybin@gmail.com
569eba39f5 Issue 2081: Expose function's (closure's) inner context in debugger.
This is against the correct branch (bleeding_edge).

Review URL: https://chromiumcodereview.appspot.com/10171003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11458 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-26 20:16:53 +00:00
mstarzinger@chromium.org
94e5a8dfcd Print compare-state with --print-code-stubs.
R=vegorov@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10235006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11457 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-26 16:19:14 +00:00
erik.corry@gmail.com
f7b4a96b84 Fix spurious bugs in GrowAndShrinkNewSpace when the
min and max new space sizes are equal.
Review URL: https://chromiumcodereview.appspot.com/10241002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11456 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-26 14:45:58 +00:00
erik.corry@gmail.com
292e007cf3 Remove more assumptions from debug tests. Even though a function
is optimized, does not mean all frames on the stack are optimized.
Also, when we ask for the list of scripts we may get more or less
depending on GC timing.  Also fixed a presubmit error and made
%GetOptimizationStatus a little more honest.
Review URL: https://chromiumcodereview.appspot.com/10234007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11455 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-26 13:44:18 +00:00
fschneider@chromium.org
f46906d7a8 Reduce size of LIR instruction by one word and remove dead code.
Until now we always recorded two deoptimization environments for instructions
that are marked as calls. We actually don't need two for all LIR
instructions except one (LInstanceOfKnownGlobal) where there is a lazy
deoptimization point in deferred code.

This change remove on of them and uses one virtual function instead
to make LInstanceOfKnownGlobal work as before.

Additionally, this change removes an unused predicate save_doubles_ from LIR
instructions and removes some helper functions that are used only in one place.
Review URL: https://chromiumcodereview.appspot.com/10035021

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11454 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2012-04-26 12:43:00 +00:00