Word32 shifts are always safe on ia32 and x64, independent of whether
SSE4.1 is available.

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/975363002

Cr-Commit-Position: refs/heads/master@{#26984}

We now have BreakLocation::Iterator to iterate via RelocIterator, and
create a BreakLocation when we are done iterating. The reloc info is
stored in BreakLocation in a GC-safe way and instantiated on demand.

R=ulan@chromium.org
BUG=v8:3924
LOG=N

Review URL: https://codereview.chromium.org/967323002

Cr-Commit-Position: refs/heads/master@{#26983}

Re-installing experimental natives after deserialization causes failures if
said experimental native is already included in the snapshot. However, there
is no way to tell whether a certain harmony feature has been included.

Experimental natives may also be turned on/off on-demand, which a snapshot
that includes them would not support for all cases.

The simple solution for the meantime is to never include experimental natives
in the snapshot and initialize them after deserialization on-demand.

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/981473002

Cr-Commit-Position: refs/heads/master@{#26982}

BUG=v8:3929
LOG=y

Review URL: https://codereview.chromium.org/977893002

Cr-Commit-Position: refs/heads/master@{#26981}

Notes:
- Other platforms to follow later.
- This follows Chromium practice, that mostly uses this feature these days.
- The statically linked-in startup data will stay. So whoever prefers
  the old way just needs to set the flag differently.

Reland crrev.com/959693002, once crrev.com/960883003 is in.

R=machenbach@chromium.org
BUG=

Review URL: https://codereview.chromium.org/956373002

Cr-Commit-Position: refs/heads/master@{#26980}

Each call to emit_32 uses 5 constant pool slots:
* the "emit_32" string
* undefined (the receiver)
* the argument (heap number)
* the load IC
* the call IC

This change cuts that down 20% to 4, by loading the undefined from the heap roots.

R=verwaest@chromium.org
BUG=

Review URL: https://codereview.chromium.org/980563002

Cr-Commit-Position: refs/heads/master@{#26979}

Fix Initialize & Dispose for external snapshot. Make sure v8::V8::(Initialize|Dispose) can be called in any order.

This is a follow-on to crrev.com/960883003, which fixed a memory leak in this code, but uncovered another, more subtle bug:

Previously, the code expected you would v8::V8::Initialize once, and v8::V8::Dispose once. The first bug was that in this case the holder_ variable would point to deallocated memory. The second bug was that once the snapshot was disposed, there was no way to get it back on a future Initialize. These are uncovered by the InitializeAndDisposeMultiple test case.

The fix is to keep memory to the raw snapshot and to then cleanly build & destroy the tables in Initialize & Dispose. Since sometimes setNativesBlob is called just after Initialize, that situation must be handled, too.

BUG=

Review URL: https://codereview.chromium.org/974943003

Cr-Commit-Position: refs/heads/master@{#26978}

Until this is addressed, we can simply use the regular IC, as we do
in times of serialization.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/974853002

Cr-Commit-Position: refs/heads/master@{#26977}

BUG=none
LOG=N

Review URL: https://codereview.chromium.org/969653004

Cr-Commit-Position: refs/heads/master@{#26976}

Shouldn't make a difference in practice, but it's a bit more readable and it
gets the case of a 0 shift correct without undefined behavior.

BUG=463436
LOG=N

Review URL: https://codereview.chromium.org/975283002

Cr-Commit-Position: refs/heads/master@{#26975}

Bit-shifts have undefined behaviour if the shift amount is greater
or equal to the width of the type.

In this case the code would do imm32 >> 32 when rot == 0.

A newer version of Clang unrolled the loop, optimized the first
iteration away, causing the test suite to fail with:

  #
  # Fatal error in ../src/arm/assembler-arm.cc, line 1212
  # Check failed: !rn.is(ip).
  #

as well as crashing when running Chromium tests on Android (at least
we think this was the cause, see the bug).

BUG=463436, 444089
LOG=Y

Review URL: https://codereview.chromium.org/979633002

Cr-Commit-Position: refs/heads/master@{#26974}

Revert of [x86] Use better left operand heuristic for Float64Add and Float64Mul. (patchset #1 id:1 of https://codereview.chromium.org/958583003/)

Reason for revert:
Tanks on Atom and Haswell

Original issue's description:
> [x86] Use better left operand heuristic for Float64Add and Float64Mul.
>
> R=dcarney@chromium.org
>
> Committed: https://crrev.com/9da259fb1f4ecfefeb2cf7efbe449d8aa1904032
> Cr-Commit-Position: refs/heads/master@{#26849}

TBR=dcarney@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/972243002

Cr-Commit-Position: refs/heads/master@{#26973}

R=mvstanton@chromium.org,arv@chromium.org,rossberg@chromium.org
BUG=v8:3930
LOG=Y

Committed: https://crrev.com/6898da1a28d64d1fb2962804ba566f6d618ffc70
Cr-Commit-Position: refs/heads/master@{#26960}

Committed: https://crrev.com/8d29cc11a56e77297792fe100986a80b65de0051
Cr-Commit-Position: refs/heads/master@{#26963}

Committed: https://crrev.com/0705045b50a29cf1273e9e6b86fe6a627d8dcb43
Cr-Commit-Position: refs/heads/master@{#26966}

Review URL: https://codereview.chromium.org/975463002

Cr-Commit-Position: refs/heads/master@{#26972}

R=dslomov@chromium.org
BUG=3983
LOG=Y

Review URL: https://codereview.chromium.org/977543002

Cr-Commit-Position: refs/heads/master@{#26971}

Reason for disabling failure on ARM64 simulator in no-snap mode.

TBR=dslomov@chromium.org
TEST=cctest/test-run-jsexceptions/DeoptFinallyReturn
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/975003002

Cr-Commit-Position: refs/heads/master@{#26970}

Revert of Implement subclassing Arrays. (patchset #8 id:130001 of https://codereview.chromium.org/975463002/)

Reason for revert:
Arm compilation again.

Aaaarrrrrghhhhhh!!!

Original issue's description:
> Implement subclassing Arrays.
>
> R=mvstanton@chromium.org,arv@chromium.org,rossberg@chromium.org
> BUG=v8:3930
> LOG=Y
>
> Committed: https://crrev.com/6898da1a28d64d1fb2962804ba566f6d618ffc70
> Cr-Commit-Position: refs/heads/master@{#26960}
>
> Committed: https://crrev.com/8d29cc11a56e77297792fe100986a80b65de0051
> Cr-Commit-Position: refs/heads/master@{#26963}
>
> Committed: https://crrev.com/0705045b50a29cf1273e9e6b86fe6a627d8dcb43
> Cr-Commit-Position: refs/heads/master@{#26966}

TBR=arv@chromium.org,mvstanton@chromium.org,rossberg@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3930

Review URL: https://codereview.chromium.org/976693002

Cr-Commit-Position: refs/heads/master@{#26969}

This just contains test, no fixes. Note that some of the tests are
still disabled because they either fail or we don't want ClusterFuzz
to pick up the flag yet.

R=jarin@chromium.org
TEST=cctest/test-run-jsexceptions/Deopt,mjsunit/compiler/try-deopt

Review URL: https://codereview.chromium.org/972943004

Cr-Commit-Position: refs/heads/master@{#26968}

Port 4acbc93d

BUG=

Review URL: https://codereview.chromium.org/974873002

Cr-Commit-Position: refs/heads/master@{#26967}

R=mvstanton@chromium.org,arv@chromium.org,rossberg@chromium.org
BUG=v8:3930
LOG=Y

Committed: https://crrev.com/6898da1a28d64d1fb2962804ba566f6d618ffc70
Cr-Commit-Position: refs/heads/master@{#26960}

Committed: https://crrev.com/8d29cc11a56e77297792fe100986a80b65de0051
Cr-Commit-Position: refs/heads/master@{#26963}

Review URL: https://codereview.chromium.org/975463002

Cr-Commit-Position: refs/heads/master@{#26966}

Revert of Implement subclassing Arrays. (patchset #7 id:110001 of https://codereview.chromium.org/975463002/)

Reason for revert:
Arm buildre complains again (why v8_linux_arm_dbg does not complain?)

Original issue's description:
> Implement subclassing Arrays.
>
> R=mvstanton@chromium.org,arv@chromium.org,rossberg@chromium.org
> BUG=v8:3930
> LOG=Y
>
> Committed: https://crrev.com/6898da1a28d64d1fb2962804ba566f6d618ffc70
> Cr-Commit-Position: refs/heads/master@{#26960}
>
> Committed: https://crrev.com/8d29cc11a56e77297792fe100986a80b65de0051
> Cr-Commit-Position: refs/heads/master@{#26963}

TBR=arv@chromium.org,mvstanton@chromium.org,rossberg@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3930

Review URL: https://codereview.chromium.org/974963002

Cr-Commit-Position: refs/heads/master@{#26965}

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/962963007

Cr-Commit-Position: refs/heads/master@{#26964}

R=mvstanton@chromium.org,arv@chromium.org,rossberg@chromium.org
BUG=v8:3930
LOG=Y

Committed: https://crrev.com/6898da1a28d64d1fb2962804ba566f6d618ffc70
Cr-Commit-Position: refs/heads/master@{#26960}

Review URL: https://codereview.chromium.org/975463002

Cr-Commit-Position: refs/heads/master@{#26963}

BUG=

Review URL: https://codereview.chromium.org/969353003

Cr-Commit-Position: refs/heads/master@{#26962}

Revert of Implement subclassing Arrays. (patchset #6 id:90001 of https://codereview.chromium.org/975463002/)

Reason for revert:
ARM build failure...

Original issue's description:
> Implement subclassing Arrays.
>
> R=mvstanton@chromium.org,arv@chromium.org,rossberg@chromium.org
> BUG=v8:3930
> LOG=Y
>
> Committed: https://crrev.com/6898da1a28d64d1fb2962804ba566f6d618ffc70
> Cr-Commit-Position: refs/heads/master@{#26960}

TBR=arv@chromium.org,rossberg@chromium.org,dslomov@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3930

Review URL: https://codereview.chromium.org/975693002

Cr-Commit-Position: refs/heads/master@{#26961}

R=mvstanton@chromium.org,arv@chromium.org,rossberg@chromium.org
BUG=v8:3930
LOG=Y

Review URL: https://codereview.chromium.org/975463002

Cr-Commit-Position: refs/heads/master@{#26960}

Also allow inlining of native functions.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/962963006

Cr-Commit-Position: refs/heads/master@{#26959}

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/968913002

Cr-Commit-Position: refs/heads/master@{#26958}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/960273002

Cr-Commit-Position: refs/heads/master@{#26957}

BUG=

Review URL: https://codereview.chromium.org/974783003

Cr-Commit-Position: refs/heads/master@{#26956}

Problem:
Excuting with flags as "--prof --logfile-per-isolate --logfile=/path/to/filename"
expected file name: /path/to/isolate-<isolate id>-filename
current result: isolate-<isolate id>-/path/to/filename

This patch makes the file name we expected.

Review URL: https://codereview.chromium.org/960813004

Cr-Commit-Position: refs/heads/master@{#26955}

Android doesn't have swap space so if the heap goes over the physical memory
size the system will just kill us. Applying the Heap::kPointerMultipler
to heap size could cause the max heap size to be larger than physical memory.
Instead use the defaults which are based on actual physical memory configured
by Api::ConfigureDefaults().

BUG=432909
LOG=N

Review URL: https://codereview.chromium.org/960213007

Cr-Commit-Position: refs/heads/master@{#26954}

TryInline needed position only for the case when we track positions.
We can drop the position argument and use the current position from GraphBuilder.
The only problem that it doesn't match with the inline point.
The reason of that was the fact that builder had moved the position forward by
visiting arguments expressions.

I fixed this by restoring the current positon in HOptimizedGraphBuilderWithPositions::Visit*

BUG=452067
LOG=n

Review URL: https://codereview.chromium.org/962593005

Cr-Commit-Position: refs/heads/master@{#26953}

R=svenpanne@chromium.org

BUG=v8:3929
LOG=y

Review URL: https://codereview.chromium.org/972623003

Cr-Commit-Position: refs/heads/master@{#26952}

Contribution of PowerPC port (continuation of 422063005, 817143002,
866843003, and 901083004. This patch updates the ppc directories
to make them current with changes in common code, removes the
optimization to use the ool constant pool, and excludes tests that
don't pass under the ppc simulator given a 240s timeout.

Subsequent patches will cover:
   - remaining optimizations for PPC
   - remaining AIX changes not resolved by 4.8 compiler (4.8 is only recently available for AIX)
   - incremental updates required to ppc directories due to platform specific changes made
    in google repos while we complete the above steps.

	modified:   src/compiler/ppc/code-generator-ppc.cc
	modified:   src/ic/ppc/handler-compiler-ppc.cc
	modified:   src/ppc/assembler-ppc-inl.h
	modified:   src/ppc/assembler-ppc.cc
	modified:   src/ppc/assembler-ppc.h
	modified:   src/ppc/builtins-ppc.cc
	modified:   src/ppc/code-stubs-ppc.cc
	modified:   src/ppc/debug-ppc.cc
	modified:   src/ppc/deoptimizer-ppc.cc
	modified:   src/ppc/frames-ppc.cc
	modified:   src/ppc/frames-ppc.h
	modified:   src/ppc/full-codegen-ppc.cc
	modified:   src/ppc/lithium-codegen-ppc.cc
	modified:   src/ppc/lithium-ppc.cc
	modified:   src/ppc/lithium-ppc.h
	modified:   src/ppc/macro-assembler-ppc.cc
	modified:   src/ppc/macro-assembler-ppc.h
	modified:   test/cctest/cctest.status
	modified:   test/mjsunit/mjsunit.status

R=danno@chromium.org, svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/965823002

Cr-Commit-Position: refs/heads/master@{#26951}

Review URL: https://codereview.chromium.org/972053002

Cr-Commit-Position: refs/heads/master@{#26950}

Review URL: https://codereview.chromium.org/971223002

Cr-Commit-Position: refs/heads/master@{#26949}

port 7ee31a23 (r26941).

original commit message:

  Compute correct contextual load ICs in fullcodegen.

BUG=

Review URL: https://codereview.chromium.org/974483005

Cr-Commit-Position: refs/heads/master@{#26948}

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/957703003

Cr-Commit-Position: refs/heads/master@{#26947}

Port 7ee31a23

BUG=
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/969803002

Cr-Commit-Position: refs/heads/master@{#26946}

r26943 just moved the problem around

TBR=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/963023003

Cr-Commit-Position: refs/heads/master@{#26945}