Optimize for the common case and get rid of the unreadable Diamond
helper code there.

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/954173002

Cr-Commit-Position: refs/heads/master@{#26843}

Without this change, it is non-trivial to know during
runhooks, if a landmine was just triggered in a checkout
that doesn't have the initial landmines script CL yet, i.e.
that didn't create a .landmines file yet.

BUG=chromium:403263
LOG=n

Review URL: https://codereview.chromium.org/954153002

Cr-Commit-Position: refs/heads/master@{#26842}

Review URL: https://codereview.chromium.org/958533002

Cr-Commit-Position: refs/heads/master@{#26841}

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/929403004

Cr-Commit-Position: refs/heads/master@{#26840}

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/952933002

Cr-Commit-Position: refs/heads/master@{#26839}

R=svenpanne@chromium.org
TEST=manual

Review URL: https://codereview.chromium.org/944223003

Cr-Commit-Position: refs/heads/master@{#26838}

Port affcfaf4

BUG=

Review URL: https://codereview.chromium.org/954863002

Cr-Commit-Position: refs/heads/master@{#26837}

The FunctionLiteral returned from the parser for modules now has a MODULE_SCOPE,
instead of associating the module scope with a Block inside it. This makes
it easy to get at the ModuleDescriptor from the caller of Parse(), so I've added
a basic test that pokes at the scope and the descriptor. Expect more tests
in this vein.

BUG=v8:1569
LOG=n

Review URL: https://codereview.chromium.org/953983002

Cr-Commit-Position: refs/heads/master@{#26836}

Review URL: https://codereview.chromium.org/950283002

Cr-Commit-Position: refs/heads/master@{#26835}

This is to reduce code duplication but also to get the correct
behavior when we make for-of handle abrupt completion correctly.

BUG=None
LOG=N
R=adamk

Review URL: https://codereview.chromium.org/956623003

Cr-Commit-Position: refs/heads/master@{#26834}

Contribution of PowerPC port (continuation of 422063005, 817143002,
866843003, and 901083004. The bulk of the changes are to remove some
hard coded assumptions about heap page size within existing tests.
The remaining change is to use a larger heap page size for PPC linux
as this provides a performance benefit due to the larger memory page size.

	modified:   src/base/build_config.h
	modified:   src/heap/heap.cc
	modified:   test/cctest/test-alloc.cc
	modified:   test/cctest/test-constantpool.cc
	modified:   test/cctest/test-heap.cc
	modified:   test/cctest/test-spaces.cc
	modified:   test/cctest/test-weakmaps.cc
	modified:   test/cctest/test-weaksets.cc

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

BUG=

Review URL: https://codereview.chromium.org/910333004

Cr-Commit-Position: refs/heads/master@{#26833}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/951053002

Cr-Commit-Position: refs/heads/master@{#26832}

This runs the landmines script as a gclient hook. It can
as such be used to clobber local checkouts when hooks are
run locally.

It is a softer version than chromium's landmines script, as
it only deletes directories in the output directory due
to compatibility with MSVS which has "build" hardcoded as
output directory in several places.

BUG=chromium:403263
LOG=n

Review URL: https://codereview.chromium.org/955463002

Cr-Commit-Position: refs/heads/master@{#26831}

NOTRY=true

Review URL: https://codereview.chromium.org/953913002

Cr-Commit-Position: refs/heads/master@{#26830}

Revert of Revert of Turn on job based recompilation (patchset #1 id:1 of https://codereview.chromium.org/937263004/)

Reason for revert:
reland

Original issue's description:
> Revert of Turn on job based recompilation (patchset #1 id:1 of https://codereview.chromium.org/935243003/)
>
> Reason for revert:
> waterfall disagrees
>
> Original issue's description:
> > Turn on job based recompilation
> >
> > BUG=v8:3608
> > R=yangguo@chromium.org
> > LOG=y
> >
> > Committed: https://crrev.com/4ae82f64b09cdc0182cee3a5cc619a9117ac5fbc
> > Cr-Commit-Position: refs/heads/master@{#26826}
>
> TBR=yangguo@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:3608
>
> Committed: https://crrev.com/35cc692aecdea54fb07479b8d7b71059851e07e8
> Cr-Commit-Position: refs/heads/master@{#26827}

TBR=yangguo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3608

Review URL: https://codereview.chromium.org/955723002

Cr-Commit-Position: refs/heads/master@{#26829}

BUG=v8:3608
R=svenpanne@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/935453006

Cr-Commit-Position: refs/heads/master@{#26828}

Revert of Turn on job based recompilation (patchset #1 id:1 of https://codereview.chromium.org/935243003/)

Reason for revert:
waterfall disagrees

Original issue's description:
> Turn on job based recompilation
>
> BUG=v8:3608
> R=yangguo@chromium.org
> LOG=y
>
> Committed: https://crrev.com/4ae82f64b09cdc0182cee3a5cc619a9117ac5fbc
> Cr-Commit-Position: refs/heads/master@{#26826}

TBR=yangguo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3608

Review URL: https://codereview.chromium.org/937263004

Cr-Commit-Position: refs/heads/master@{#26827}

BUG=v8:3608
R=yangguo@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/935243003

Cr-Commit-Position: refs/heads/master@{#26826}

NOTRY=true

Review URL: https://codereview.chromium.org/953893002

Cr-Commit-Position: refs/heads/master@{#26825}

The output queue is supposed to be a lock-free anyways, we're just
temporarily abusing it by having multiple producers. For those, we need
the lock when enqueuing jobs.

BUG=none
R=yangguo@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/953883002

Cr-Commit-Position: refs/heads/master@{#26824}

Instead of semaphore and atomics

BUG=v8:3608
R=yangguo@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/950323002

Cr-Commit-Position: refs/heads/master@{#26823}

R=verwaest@chromium.org
BUG=v8:3914
LOG=N

Review URL: https://codereview.chromium.org/945403008

Cr-Commit-Position: refs/heads/master@{#26822}

BUG=chromium:391261
LOG=n
TBR=tandrii@chromium.org
NOTRY=true

TEST=./script_test.py

Review URL: https://codereview.chromium.org/955613003

Cr-Commit-Position: refs/heads/master@{#26821}

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/950303002

Cr-Commit-Position: refs/heads/master@{#26820}

BUG=

Review URL: https://codereview.chromium.org/755323011

Cr-Commit-Position: refs/heads/master@{#26819}

R=svenpanne@chromium.org
BUG=chromium:461042
LOG=N

Review URL: https://codereview.chromium.org/948313002

Cr-Commit-Position: refs/heads/master@{#26818}

Perform strength reduction on machine operators with inline comparisons:

  CMP & 1 => CMP
  1 & CMP => CMP
  CMP << 31 >> 31 => CMP

Also strength reduce the following constructs:

  x + (0 - y) => x - y
  (0 - y) + x => x - y

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/951903003

Cr-Commit-Position: refs/heads/master@{#26817}

R=bmeurer@chromium.org
TEST=unittests/SchedulerTest.CallException

Review URL: https://codereview.chromium.org/944903002

Cr-Commit-Position: refs/heads/master@{#26816}

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/946073003

Cr-Commit-Position: refs/heads/master@{#26815}

BUG=

Review URL: https://codereview.chromium.org/948033002

Cr-Commit-Position: refs/heads/master@{#26814}

We already use recursion to iterate over transition trees elsewhere, so this should be safe wrt. call stack height.

Review URL: https://codereview.chromium.org/942523003

Cr-Commit-Position: refs/heads/master@{#26813}

For flushing the input queue, use the input queue lock. Introduce an
explicit refcount to make sure we don't delete the thread object before
all jobs are finished.

BUG=v8:3608
R=yangguo@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/948863002

Cr-Commit-Position: refs/heads/master@{#26812}

We no longer expect NewError to return an empty handle to signal termination
exception, since TryCall simply requests a new terminate exception interrupt.

BUG=chromium:403509
LOG=N

Review URL: https://codereview.chromium.org/952483002

Cr-Commit-Position: refs/heads/master@{#26811}

BUG=v8:3892
LOG=Y

Review URL: https://codereview.chromium.org/953463002

Cr-Commit-Position: refs/heads/master@{#26810}

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/947153002

Cr-Commit-Position: refs/heads/master@{#26809}

This implements a special case of block cloning to recognize constructs like

 if (a ? b : c) { ... }

that happen to be generated by Emscripten quite often.

Review URL: https://codereview.chromium.org/947963002

Cr-Commit-Position: refs/heads/master@{#26808}

"for-of should throw if result object is not an object"

The CQ committed the CL twice

This reverts commit ab2591ed.

BUG=None
TBR=adamk

Review URL: https://codereview.chromium.org/951133002

Cr-Commit-Position: refs/heads/master@{#26807}

This is done using desugaring. Before this we had:

  result = iterator.next()

with this we instead do:

  !%_IsSpecObject(result = iterator.next()) &&
      %ThrowIteratorResultNotAnObject(result)

BUG=v8:3916
LOG=N

Review URL: https://codereview.chromium.org/929733003

Cr-Commit-Position: refs/heads/master@{#26806}

This is done using desugaring. Before this we had:

  result = iterator.next()

with this we instead do:

  !%_IsSpecObject(result = iterator.next()) &&
      %ThrowIteratorResultNotAnObject(result)

BUG=v8:3916
LOG=N

Review URL: https://codereview.chromium.org/929733003

Cr-Commit-Position: refs/heads/master@{#26805}

R=machenbach@chromium.org, jochen@chromium.org
BUG=crbug.com/344767
LOG=Y

Review URL: https://codereview.chromium.org/946023002

Cr-Commit-Position: refs/heads/master@{#26804}