Port r16489 (bde75fe)

BUG=

Review URL: https://codereview.chromium.org/23814003
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16498 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23731004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16497 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org
BUG=v8:2744

Review URL: https://codereview.chromium.org/23549010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16496 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=dcarney@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23614011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16495 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
BUG=v8:2744

Review URL: https://codereview.chromium.org/23441029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16494 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/23707009

Patch from Marja Hölttä <marja@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16493 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Condition variables are synchronization primitives that can be used
to block one or more threads while waiting for condition to become
true.

Right now we have only semaphores, mutexes and atomic operations for
synchronization, which results in quite complex solutions where an
implementation using condition variables and mutexes would be straight
forward.

There's also a performance benefit to condition variables and mutexes
vs semaphores, especially on Windows, where semaphores are kernel
objects, while mutexes are implemented as fast critical sections,
it CAN be beneficial performance-wise to use condition variables
instead of semaphores.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23548007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16492 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23835003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16491 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23606012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16490 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23729006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16489 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org
BUG=v8:2744

Review URL: https://codereview.chromium.org/23597013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16488 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23629016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16485 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This fixes a corner case introduced by escape analysis where phis are
introduced in OSR loop entry blocks that don't have a merge index and
hence cannot contain OSR values.

R=titzer@chromium.org
TEST=mjsunit/compiler/escape-analysis

Review URL: https://codereview.chromium.org/23503025

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16484 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=v8:2867
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23453019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16481 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=v8:2845
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/23871002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16476 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

to allow allocation of large packed arrays in paged spaces.

BUG=v8:2790
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23604023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16475 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/23437020

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16474 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Drop the previous Semaphore class from platform files.

Add new Semaphore class using the new TimeDelta class for
the WaitFor() operation. Consistently assert correct behaviour
for the different implementations.

Improve test coverage of the Semaphore class.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23748003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16473 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/23264015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16472 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Otherwise store ICs will never be initialized, due to lookup->CanHoldValue(value);

BUG=chromium:256330
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23533012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16471 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts 16467 for breaking windows build

TBR=svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/23824005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16468 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23479015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16467 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/23620015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16466 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23584004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16465 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

+ Replace DeferredTaggedToINoSSE2 by DoubleToIStub and a fpu version.

+ Prevent truncating TaggedToI from bailing out.

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/22290005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16464 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23859002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16463 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23824002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16462 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r16322 (8a03070)

Original commit message:
Added support for truncating DoubleToIStub and reorganize the macro-assembler
dToI operations to do the fast-path inline and the slow path by calling the
stub.

BUG=
R=gergely@homejinni.com

Review URL: https://codereview.chromium.org/23694014

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16461 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23718004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16460 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=v8:2865
R=verwaest@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/23536007

Patch from Vsevolod Vlasov <vsevik@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16459 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23819005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16456 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23819003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16455 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23495011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16454 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/23600011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16453 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23707007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16452 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/23522010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16451 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Add V8_GLIBC_PREREQ() macro to test the version of the GNU C library.
Make V8_GNUC_PREREQ() work for compilers that masquerade as GCC (you
can always use V8_CC_* to test for a specific one if you need to).
Add V8_LIBC_* to detect the C library in use.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/23717009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16450 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Fixed mac build.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23490022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16449 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/23541006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16448 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/23460012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16445 ce2b1a6d-e550-0410-aec6-3dcde31c8c00