port 4b38c158 (r29527).

original commit message:

    We actually need round to zero truncation to implement the counterpart
    of LDoubleToI in TurboFan, which tries to convert a double to an integer
    as required for keyed load/store optimizations.

    Drive-by-cleanup: Reduce some code duplication in the InstructionSelector
    implementations.

BUG=

Review URL: https://codereview.chromium.org/1227923003

Cr-Commit-Position: refs/heads/master@{#29629}

port 737b8573 (r29539)

original commit message:

    - Add a TurboFanIC class, derived from TurboFanCodeStub, that
      automatically distinguishes between versions of the IC called from
      optimized and unoptimized code.
    - Add appropriate InterfaceDescriptors for both the versions of the
      stub called from unoptimized and optimized code
    - Change the MathFloor TF stub generator to output either the
      for-optimized or for-unoptimized version based on the minor_key
      parameter.

BUG=

Review URL: https://codereview.chromium.org/1235823002

Cr-Commit-Position: refs/heads/master@{#29628}

R=dstence@us.ibm.com, michael_dawson@ca.ibm.com

Review URL: https://codereview.chromium.org/1239583002

Cr-Commit-Position: refs/heads/master@{#29627}

* Fix embarrassing bug in DeserializeValue, using a static buffer in
multithreaded code.
* Fix thread leak when Worker.terminate() is not called.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1226143003

Cr-Commit-Position: refs/heads/master@{#29626}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1232243002

Cr-Commit-Position: refs/heads/master@{#29625}

Port 01f40e6a

BUG=v8:4296
LOG=n

Review URL: https://codereview.chromium.org/1233923002

Cr-Commit-Position: refs/heads/master@{#29624}

Port 6ddcd327

R=mstarzinger@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1234953002

Cr-Commit-Position: refs/heads/master@{#29623}

Port 01f40e6a

R=verwaest@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1231633006

Cr-Commit-Position: refs/heads/master@{#29622}

Port f0d1106a

Fixes possible failure in AssembleArchTableSwitch().

BUG=v8:4294
LOG=y

Review URL: https://codereview.chromium.org/1235883004

Cr-Commit-Position: refs/heads/master@{#29621}

Port a0129a25

R=rmcilroy@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1232803004

Cr-Commit-Position: refs/heads/master@{#29620}

PPC: This CL also adds hydrogen stubs for global loads and global stores, full-codegen and TurboFan now uses this machinery.

Fix f87286e2

R=ishell@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com

Original commit message:
    Loads and stores to global vars are now made via property cell shortcuts installed into parent script context.

BUG=

Review URL: https://codereview.chromium.org/1228393005

Cr-Commit-Position: refs/heads/master@{#29619}

BUG=v8:4296
LOG=n

Review URL: https://codereview.chromium.org/1228063004

Cr-Commit-Position: refs/heads/master@{#29618}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1227163011

Cr-Commit-Position: refs/heads/master@{#29617}

The CL addes convenienve method that allows to write code like the following
v8::Local<v8::Object> local = v8::Local<v8::Object>::New(global, isolate);
in a more readable way:
v8::Local<v8::Object> local = global.Get(isolate);

There is already v8::Eternal::Get that does similar thing.

BUG=None
LOG=Y

Review URL: https://codereview.chromium.org/1237603003

Cr-Commit-Position: refs/heads/master@{#29616}

BUG=v8:3956
LOG=N

Review URL: https://codereview.chromium.org/1225303005

Cr-Commit-Position: refs/heads/master@{#29615}

BUG=

Review URL: https://codereview.chromium.org/1238463002

Cr-Commit-Position: refs/heads/master@{#29614}

Added project.cfg metadata file for chrome-infra

R=machenbach@chromium.org, sergiyb@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=507723

Review URL: https://codereview.chromium.org/1230823005

Cr-Commit-Position: refs/heads/master@{#29613}

Cr-Commit-Position: refs/heads/master@{#29612}

NON_CONTEXTUAL ~> INSIDE_TYPEOF
CONTEXTUAL ~> NOT_INSIDE_TYPEOF

Review URL: https://codereview.chromium.org/1227893005

Cr-Commit-Position: refs/heads/master@{#29611}

Port 2027335f

Original commit message:
Note that there are currently no objects that require a pre-allocated
properties backing store, all such slots are in-object properties from
the begining. Hence {unused + pre_allocated - inobject == 0} holds.

BUG=

Review URL: https://codereview.chromium.org/1226363003

Cr-Commit-Position: refs/heads/master@{#29610}

This also adds a script to the tools directory that allows to grep for
unused bailout reasons. For now the script needs to be run manually.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1237623003

Cr-Commit-Position: refs/heads/master@{#29609}

TEST=mjsunit/asm/embenchen/box2d
BUG=

Review URL: https://codereview.chromium.org/1234533004

Cr-Commit-Position: refs/heads/master@{#29608}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1235893002

Cr-Commit-Position: refs/heads/master@{#29607}

BUG=v8:3956
LOG=N

Review URL: https://codereview.chromium.org/1235883002

Cr-Commit-Position: refs/heads/master@{#29606}

BUG=chromium:508921
LOG=n

Review URL: https://codereview.chromium.org/1234443003

Cr-Commit-Position: refs/heads/master@{#29605}

Review URL: https://codereview.chromium.org/1221433021

Cr-Commit-Position: refs/heads/master@{#29604}

- split relocation info for debug break slots for
  - calls (with call arguments count as data)
  - construct calls
  - normal slots
- renamed DEBUG_BREAK into DEBUGGER_STATEMENT
- removed unused IC state for Debug stubs

R=ulan@chromium.org
BUG=v8:4269
LOG=N

Review URL: https://codereview.chromium.org/1232803002

Cr-Commit-Position: refs/heads/master@{#29603}

The JSContextSpecialization should only care about loads from the
context and stores to the context, where the context is either a
HeapConstant or the special context Parameter (and a context for the
outer most function is provided). This way we don't eagerly embed
arbitrary context constants for no benefit, but we still specialize the
loads and store which we actually care about.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/1227963005

Cr-Commit-Position: refs/heads/master@{#29602}

Review URL: https://codereview.chromium.org/1226503005

Cr-Commit-Position: refs/heads/master@{#29601}

Reason for revert:
[Sheriff] Looks like another clang option got deprecated: http://build.chromium.org/p/client.v8/builders/V8%20Linux%20ASAN%20mipsel%20-%20debug%20builder/builds/326

Original issue's description:
> Update V8 DEPS.
>
> Rolling v8/tools/clang to 58128abd44c22255def1163d30bc9bb2cc85e15c
>
> Original CL: https://codereview.chromium.org/1232043002/
>
> BUG=
>
> Committed: https://crrev.com/6211e1660492f653d30ddd1336bce6f9083ede94
> Cr-Commit-Position: refs/heads/master@{#29598}

TBR=jochen@chromium.org,akos.palfi@imgtec.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1232803003

Cr-Commit-Position: refs/heads/master@{#29600}

Revert of Enable loads and stores to global vars through property cell shortcuts installed into parent script… (patchset #1 id:1 of https://codereview.chromium.org/1237603002/)

Reason for revert:
[Sheriff] This changes lots of layout tests. See comment on CL.

Original issue's description:
> Enable loads and stores to global vars through property cell shortcuts installed into parent script context.
>
> Committed: https://crrev.com/cd61b047f1ab92c353a629556f9d3ad571ace1b1
> Cr-Commit-Position: refs/heads/master@{#29595}

TBR=verwaest@chromium.org,ishell@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1236863002

Cr-Commit-Position: refs/heads/master@{#29599}

Rolling v8/tools/clang to 58128abd44c22255def1163d30bc9bb2cc85e15c

Original CL: https://codereview.chromium.org/1232043002/

BUG=

Review URL: https://codereview.chromium.org/1232583002

Cr-Commit-Position: refs/heads/master@{#29598}

Up until now we were unable to have profiler ticks beyong 255, which
basically disabled OSR for moderately large functions.

BUG=chromium:508741
LOG=n
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1224173003

Cr-Commit-Position: refs/heads/master@{#29597}

BUG=chromium:509545
LOG=n

Review URL: https://codereview.chromium.org/1232823002

Cr-Commit-Position: refs/heads/master@{#29596}

Enable loads and stores to global vars through property cell shortcuts installed into parent script context.

Review URL: https://codereview.chromium.org/1237603002

Cr-Commit-Position: refs/heads/master@{#29595}

This is follow-up for a5616e.

BUG=chromium:508584
LOG=NO

Review URL: https://codereview.chromium.org/1234513003

Cr-Commit-Position: refs/heads/master@{#29594}

Until now, TF-generated code stubs piggy-backed off of the builtin
context. Since generation of code stubs is lazy, stubs generated at
different times in different native contexts would contain embedded
pointers different builtin contexts, leading to cross-context references
and memory leaks.

After this CL, all TF-generated code stubs are generated inside a
internal thinned-out, native context that lives solely for the
purpose of hosting generated code stubs.

Review URL: https://codereview.chromium.org/1213203007

Cr-Commit-Position: refs/heads/master@{#29593}

Loads and stores to global vars are now made via property cell shortcuts installed into parent script context.

This CL also adds hydrogen stubs for global loads and global stores, full-codegen and TurboFan now uses this machinery.

Review URL: https://codereview.chromium.org/1224793002

Cr-Commit-Position: refs/heads/master@{#29592}

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1234443004

Cr-Commit-Position: refs/heads/master@{#29591}

Note that there are currently no objects that require a pre-allocated
properties backing store, all such slots are in-object properties from
the begining. Hence {unused + pre_allocated - inobject == 0} holds.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/1226203011

Cr-Commit-Position: refs/heads/master@{#29590}