Ensure CopyElementsImpl is always executed so it fills in holes even if from_size is 0. Allow FixedDoubleArray::cast to also support FixedArray with size 0.

Review URL: https://chromiumcodereview.appspot.com/11280054

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13000 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit 2fc4424b00296cc06d6f7eb4bf31ec9c3d6be68a.

Even symbols shouldn't be shared across Isolates. The CL has to be reworked to
use a (Isolate,C-string)->v8-symbol mapping. Slowly approaching Chrome... :-/

Review URL: https://codereview.chromium.org/11419067

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12999 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Timing happens in a scope.  Since crankshaft has been chopped up into three methods, this approach is wrong.

BUG=

Review URL: https://chromiumcodereview.appspot.com/11411065

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12998 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The last call to GetOwnPropertyImplementation() was removed in r12990.

Review URL: https://codereview.chromium.org/11411038
Patch from Adam Klein <adamk@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12997 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/11308090

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12996 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/11316047

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12993 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/11414030

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12992 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This also reduces the number of TLS accesses, so it is a double-win. We have
230k less TLS accesses while running Octane now, so we are down to 23% now
compared to the start of these TLS-related CLs.

Introduced a tiny helper function for throwing on the way.

Review URL: https://codereview.chromium.org/11417029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12991 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Eliminates substantial amounts of fragile code duplication and special casing.

Also fixes "a".propertyIsEnumerable(0) to correctly return true.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/11420011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12990 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org
BUG=v8:2263
TEST=mjsunit/regress/regress-2263

Review URL: https://codereview.chromium.org/11280025

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12989 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/11299033

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12988 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org
TEST=cctest/test-heap/PrototypeTransitionClearing

Review URL: https://codereview.chromium.org/11411031

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12987 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=

Review URL: https://chromiumcodereview.appspot.com/11419012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12986 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

- perform CPU profiler sampling in the sampler thread as we used to;
- skip sampling in the sampling thread if processing thread is running;
- only install SIGPROF handler when CPU profiling is enabled.

BUG=v8:2364

Review URL: https://codereview.chromium.org/11231002
Patch from Sergey Rogulenko <rogulenko@google.com> and Andrey Kosyakov <caseq@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12985 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This disables the above regression test when run with forced marking
deque overflows (which is implicitly enabled by --stress-compaction).

R=verwaest@chromium.org
TEST=cctest/test-heap/InstanceOfStubWriteBarrier

Review URL: https://codereview.chromium.org/11417026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12984 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Note: The test here requires https://codereview.chromium.org/11364237/ to land in order to pass because Object.freeze calls Object.getOwnPropertyNames().

BUG=v8:2411

Review URL: https://codereview.chromium.org/11377171
Patch from Rafael Weinstein <rafaelw@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12983 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also apply the same fix elsewhere in v8natives.js

BUG=v8:2410

Review URL: https://codereview.chromium.org/11364237
Patch from Adam Klein <adamk@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12982 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This patch causes V8 to disable EXTRA_CHECKS when building in release. You can
still enable the checks in release using a GYP flag.

This patch speeds up Dromeo's dom-traverse by around 4%.

Review URL: https://codereview.chromium.org/11275324
Patch from Adam Barth <abarth@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12981 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://codereview.chromium.org/11413014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12980 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

For Octane, the number of calls go down from 7341629 to 1947880, i.e. they are
reduced by more than 73%. TLS access is not especially cheap, so this exercise
seems worthwhile.

Review URL: https://codereview.chromium.org/11412007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12979 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This implements incremental scanning of large objects using a progress
bar in the page header of such objects. Note that this requires forward
white to gray transitions in the write barrier and hence is disabled by
default for now.

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

Review URL: https://codereview.chromium.org/11362246

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12978 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/11419011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12977 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org
BUG=

Review URL: https://codereview.chromium.org/11412005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12976 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/11417007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12975 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/11417006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12974 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

* src/profile-generator.cc (V8HeapExplorer::GetSystemEntryName): For
  maps of strings, return a name that encodes the representation
  strategy used for the strings.
  (V8HeapExplorer::ExtractReferences): For strings, visit the maps as
  well, so that the user can see what representation is used for their
  strings.

See http://wingolog.org/pub/string-representations.png for an example of what it looks like.

BUG=

Review URL: https://chromiumcodereview.appspot.com/11344021
Patch from Andy Wingo <wingo@igalia.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12973 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This is a straight rename:

NewRawAsciiString -> NewRawOneByteString
SeqAscii -> SeqOneByte

SeqOneByteString cannot yet take non-ascii data.

R=yangguo@chromium.org,
BUG=

Review URL: https://chromiumcodereview.appspot.com/11411005
Patch from Dan Carney <dcarney@google.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12972 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

MIPS: Add rotate-right instruction to hydrogen and use it instead of bitwise operations of the form ((x >>> i) | (x << (32 - i))).

Port r12855 (be965042)

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/11293140
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12971 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
TEST=test262

Review URL: https://codereview.chromium.org/11416008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12970 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Currently missing support for unshift.

BUG=

Review URL: https://chromiumcodereview.appspot.com/11377132

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12969 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org
TEST=test262

Review URL: https://codereview.chromium.org/11308033

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12968 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Extended ElementAccessor interface to allow querying PropertyType and
AccessorPair. Also added respective functionality to JSObject.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/11358234

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12967 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=

Review URL: https://chromiumcodereview.appspot.com/11360251
Patch from Dan Carney <dcarney@google.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12966 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r12898 (69ff6e50)

Original commit message:
When code objects in the heap for FUNCTIONs and OPTIMIZED_FUNCTIONs are marked by the GC, their prologue is patched with a call to a stub that removes the patch. This allows the collector to quickly identify code objects that haven't been executed since the last full collection (they are the ones that sill contain the patch). The functionality is currently disabled, but can be activated by specifying the "--age-code".

BUG=
TEST=

Review URL: https://codereview.chromium.org/11358252
Patch from Akos Palfi <palfia@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12965 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org
BUG=v8:2403

Review URL: https://codereview.chromium.org/11419002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12964 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

That change added a test which called the handlified version of JSObject::SetElement and didn't check the return value, but that method has a MUST_USE_RESULT annotation. This change removes the annotation for consistency with other handlified static methods (like SetProperty).

Review URL: https://chromiumcodereview.appspot.com/11359212
Patch from Adam Klein <adamk@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12963 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The previous implementation in Accessors::ArraySetLength failed when array length was set through StoreIC_ArrayLength. But that stub and the accessor both delegate to JSArray::SetElementsLength, so moving the code there allows notifications to be sent in both cases.

Review URL: https://codereview.chromium.org/11275292
Patch from Adam Klein <adamk@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12962 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Lattice-based representation inference, powered by left/right specific type feedback for BinaryOps and comparisons

Review URL: https://chromiumcodereview.appspot.com/10837165

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12961 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Review URL: https://chromiumcodereview.appspot.com/11359104

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12960 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/11377134

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12959 ce2b1a6d-e550-0410-aec6-3dcde31c8c00