High promotion mode limits new space size in the case where many objects (high
rate) are promoted.  The result is frequent scavenger runs with low pause times. The
approach conflicts with pretenuring which requires a larger new space size to
collect enough feedback to be usable.

Ultimately the goal is to have pretenuring catch allocation sites that have high
promotion rates.

Revert "Bring back high promotion mode to shrink young generation size when scavenging latency is high."

This reverts commit 37be1d5e.

Revert "GC. Delay/avoid entering high promotion mode"

This reverts commit a5221d07.

BUG=chromium:499507,chromium:506910
LOG=n

Review URL: https://codereview.chromium.org/1247723003

Cr-Commit-Position: refs/heads/master@{#29983}

BUG=chromium:514081
R=jarin@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1264723002

Cr-Commit-Position: refs/heads/master@{#29982}

As demanded by the spec.

BUG=chromium:516251
R=jkummerow@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1261453004

Cr-Commit-Position: refs/heads/master@{#29981}

Rename method EmitIsSpecObject -> EmitIsSimdObject.

LOG=N
BUG=v8:4124

Review URL: https://codereview.chromium.org/1263473008

Cr-Commit-Position: refs/heads/master@{#29980}

BUG=chromium:454297
LOG=n

Review URL: https://codereview.chromium.org/1268663004

Cr-Commit-Position: refs/heads/master@{#29979}

NOPRESUBMIT=true
R=titzer@chromium.org, michael_dawson@ca.ibm.com, jyan@ca.ibm.com, joransiu@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1271583002

Cr-Commit-Position: refs/heads/master@{#29978}

R=mstarzinger@chromium.org
BUG=
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/1263363002

Cr-Commit-Position: refs/heads/master@{#29977}

Reland of land concurrent sweeping of code space. (patchset #1 id:1 of https://codereview.chromium.org/1263343002/)

Reason for revert:
Bogus revert.

Original issue's description:
> Revert of Reland concurrent sweeping of code space. (patchset #6 id:100001 of https://codereview.chromium.org/1242333002/)
>
> Reason for revert:
> Reverted because 507840 came back on recent Chromecrash. Should not have committed this Cl.
>
> Original issue's description:
> > Reland concurrent sweeping of code space.
> >
> > BUG=
> >
> > Committed: https://crrev.com/8516dccf6a561020441773c93c564dd4aa6ee59e
> > Cr-Commit-Position: refs/heads/master@{#29967}
>
> TBR=jochen@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=
>
> Committed: https://crrev.com/5c6e7d00438cc82a5584e3178d7dadf36e4a34f8
> Cr-Commit-Position: refs/heads/master@{#29975}

TBR=jochen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1271773002

Cr-Commit-Position: refs/heads/master@{#29976}

Revert of Reland concurrent sweeping of code space. (patchset #6 id:100001 of https://codereview.chromium.org/1242333002/)

Reason for revert:
Reverted because 507840 came back on recent Chromecrash. Should not have committed this Cl.

Original issue's description:
> Reland concurrent sweeping of code space.
>
> BUG=
>
> Committed: https://crrev.com/8516dccf6a561020441773c93c564dd4aa6ee59e
> Cr-Commit-Position: refs/heads/master@{#29967}

TBR=jochen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1263343002

Cr-Commit-Position: refs/heads/master@{#29975}

Adds Int32x4, Bool32x4, Int16x8, Bool16x8, Int8x16, Bool8x16.
Adds Simd128Value base heap object class.
Changes heap/factory construction pattern to use arrays.
Adds replaceLane functions to facilitate testing.

NOPRESUBMIT=true
(presubmit checks erroneously interpret array declaration in macro definition as variable size array.)

LOG=Y
BUG=v8:4124

Review URL: https://codereview.chromium.org/1250733005

Cr-Commit-Position: refs/heads/master@{#29974}

The calculation now takes into account the size of the arguments object
if it is present in the optimized frame.

(Yang, many thanks for the awesome repro!)

BUG=chromium:514362
LOG=N
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1264483008

Cr-Commit-Position: refs/heads/master@{#29973}

BUG=v8:4141
LOG=n
NOTRY=true
TBR=yangguo@chromium.org, vogelheim@chromium.org

Review URL: https://codereview.chromium.org/1263033005

Cr-Commit-Position: refs/heads/master@{#29972}

This fixes a bug introduced by r28826 (Unify decoding of deoptimization
translations, https://codereview.chromium.org/1136223004), where we
started leaking arguments marker sentinel to the debugger, which would
then cause crashes. This change replaces the sentinel with the undefined
value in the debugger-inspectable frame.

BUG=chromium:514362
LOG=n
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1263333002

Cr-Commit-Position: refs/heads/master@{#29971}

The BytecodeArrayBuilder has responsibility for emitting the BytecodeArray. It will be used by the AST walker.

Bytecode now uses an accumulator plus registers rather being pure register based.

Update BytecodeArray::Disassemble to print operand information.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1266713004

Cr-Commit-Position: refs/heads/master@{#29970}

No-snap builds are still failing.

NOTREECHECKS=true
NOTRY=true
TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1260283006

Cr-Commit-Position: refs/heads/master@{#29969}

Original CL: https://crrev.com/5aaceefd9a84327ce6afeaea16557449bf83ce57

BUG=chromium:515721
LOG=NO

Review URL: https://codereview.chromium.org/1264063003

Cr-Commit-Position: refs/heads/master@{#29968}

BUG=

Review URL: https://codereview.chromium.org/1242333002

Cr-Commit-Position: refs/heads/master@{#29967}

Otherwise we may choose sloppy const or strict const depending on
whether the function is parsed the first time.

R=mvstanton@chromium.org
BUG=v8:4336
LOG=N

Review URL: https://codereview.chromium.org/1260053004

Cr-Commit-Position: refs/heads/master@{#29966}

Use a CHECK statement to find any violations of this rule.

Review URL: https://codereview.chromium.org/1255383004

Cr-Commit-Position: refs/heads/master@{#29965}

port ec9bc794 (r29949).

original commit message:

    Previously these instructions tried to jump to the value at the code entry's
    location, rather than jumping to this location. Also adds a test.

BUG=

Review URL: https://codereview.chromium.org/1256163003

Cr-Commit-Position: refs/heads/master@{#29964}

port 1a5751f9 (r29956)

original commit message:

    Since we need the notion of a dummy vector ic, we can use that to avoid
    a special case of the IC constructor. Also, consolidate the two dummy
    ICs into one.

BUG=

Review URL: https://codereview.chromium.org/1265113002

Cr-Commit-Position: refs/heads/master@{#29963}

Introduce new mechanism for relocating j/jal.

Resolves flaky failures of mozilla regress tests.

Additionally:

- internal encoded references are not relocated during code generation phase.
- remove asserts from j and jal which are not
valid because addresses are not final and valid in code generation phase.

TEST=mozilla/js1_5/Regress/regress-280769-2, regress-367561-01,
     mozilla/ecma_3/Statements/regress-444979
BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/1216823003 .

Patch from dusan.milosavljevic <dusan.milosavljevic@imgtec.com>.

Cr-Commit-Position: refs/heads/master@{#29962}

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1269813006

Cr-Commit-Position: refs/heads/master@{#29961}

Rolling v8/testing/gmock to 0421b6f358139f02e102c9c332ce19a33faf75be

Rolling v8/testing/gtest to 9855a87157778d39b95eccfb201a9dc90f6d61c6

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1271653002

Cr-Commit-Position: refs/heads/master@{#29960}

Port 1a5751f9

Original commit message:
    Since we need the notion of a dummy vector ic, we can use that to avoid
    a special case of the IC constructor. Also, consolidate the two dummy
    ICs into one.

R=mvstanton@chromium.org, michael_dawson@ca.ibm.com, jyan@ca.ibm.com, joransiu@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1261433007

Cr-Commit-Position: refs/heads/master@{#29959}

BUG=

Review URL: https://codereview.chromium.org/1260283002

Cr-Commit-Position: refs/heads/master@{#29958}

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1269913002

Cr-Commit-Position: refs/heads/master@{#29957}

Since we need the notion of a dummy vector ic, we can use that to avoid
a special case of the IC constructor. Also, consolidate the two dummy
ICs into one.

BUG=

Review URL: https://codereview.chromium.org/1268783004

Cr-Commit-Position: refs/heads/master@{#29956}

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1268433003

Cr-Commit-Position: refs/heads/master@{#29955}

Improve code generated for flag materialization.

Review URL: https://codereview.chromium.org/1260733003

Cr-Commit-Position: refs/heads/master@{#29954}

This is the initial (big) step towards a more uniform implementation of
the ToObject abstract operation (ES6 7.1.13), where we have a fallback
implementation in JSReceiver::ToObject() and a fast (hydrogen) CodeStub
to deal with the fast case (we should be able to do more cleanup on this
in a followup CL).  For natives we expose the abstract operation via a
%_ToObject intrinsic, also exposed via a macro TO_OBJECT, that unifies
the previous confusion with TO_OBJECT_INLINE, ToObject, TO_OBJECT,
$toObject and %$toObject.  Now the whole implementation of the abstract
operation is context independent, meaning we don't need any magic in the
builtins object nor the native context.

R=mvstanton@chromium.org,yangguo@chromium.org

Review URL: https://codereview.chromium.org/1266013006

Cr-Commit-Position: refs/heads/master@{#29953}

Also, a one line fix in TurboFan to call the correct store ic.

BUG=

Review URL: https://codereview.chromium.org/1266983002

Cr-Commit-Position: refs/heads/master@{#29952}

R=cbruni@chromium.org

Review URL: https://codereview.chromium.org/1265923002

Cr-Commit-Position: refs/heads/master@{#29951}

BUG=

Review URL: https://codereview.chromium.org/1262363002

Cr-Commit-Position: refs/heads/master@{#29950}

Previously these instructions tried to jump to the value at the code entry's
location, rather than jumping to this location. Also adds a test.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1265723003

Cr-Commit-Position: refs/heads/master@{#29949}

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1256723003

Cr-Commit-Position: refs/heads/master@{#29948}

This partially brings back the heuristic from v8 4.44.

BUG=

Review URL: https://codereview.chromium.org/1269743002

Cr-Commit-Position: refs/heads/master@{#29947}

R=hpayer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1261123003

Cr-Commit-Position: refs/heads/master@{#29946}

BUG=

Review URL: https://codereview.chromium.org/1269753002

Cr-Commit-Position: refs/heads/master@{#29945}

Revert of [cq] Increase commit burst delay. (patchset #1 id:1 of https://codereview.chromium.org/1258193003/)

Reason for revert:
Committing more than one CL at a time led to some odd buildbot behavior on the console (probably an independent bug).

Original issue's description:
> [cq] Increase commit burst delay.
>
> TBR=jkummerow@chromium.org, hablich@chromium.org
> NOTRY=true
> NOTREECHECKS=true
>
> Committed: https://crrev.com/1f2e914d103532df410f118c81c60fba8b6a00e0
> Cr-Commit-Position: refs/heads/master@{#29914}

TBR=jkummerow@chromium.org,hablich@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1263183002

Cr-Commit-Position: refs/heads/master@{#29944}