TEST=mjsunit,unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/691513002

Cr-Commit-Position: refs/heads/master@{#24980}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24980 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r24976 (5cb743f)

Original commit message:
This is done by installing the [[HomeObject]] on the method and the
accessor functions.

BUG=v8:3330
LOG=Y
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/691503002

Cr-Commit-Position: refs/heads/master@{#24979}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24979 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/671043004

Cr-Commit-Position: refs/heads/master@{#24978}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24978 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

It broke the context snapshot by trying to get ahold of the
per-isolate observation_state object too early.

This reverts commit a137cb74.

TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/692473002

Cr-Commit-Position: refs/heads/master@{#24977}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24977 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This is done by installing the [[HomeObject]] on the method and the
accessor functions.

BUG=v8:3330
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/683893002

Cr-Commit-Position: refs/heads/master@{#24976}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24976 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/650663003

Cr-Commit-Position: refs/heads/master@{#24975}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24975 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also add corresponding unit tests.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/684813004

Cr-Commit-Position: refs/heads/master@{#24974}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24974 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/684103002

Cr-Commit-Position: refs/heads/master@{#24973}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24973 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The biggest change is the removal of the map wrapper objects: we now operate
directly on the observation weak map, since there are already Get/GetOrCreate/Set
functions for each info map. Various other small cleanups as well, including the
deletion of unnecessary forwarding functions and making use of standard macros.

R=arv@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/686773002

Cr-Commit-Position: refs/heads/master@{#24972}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24972 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Scenario:
On reload, Devtools restores previously set break points. At this point,
since Devtools is already opened, all code is compiled with debug break
slots. No break points exist yet, so we would lazily compile inner
functions, even ones that cannot be compiled lazily without a context.
So when we use Debug::FindSharedFunctionInfoInScript to find the break
positions, those lazily compiled functions are skipped.

By eagerly compiling when debug is active, we make sure that whenever
Devtools is open, functions that cannot be compiled lazily without a
context are always compiled with its outer function.

R=ulan@chromium.org
BUG=chromium:424142
LOG=N

Review URL: https://codereview.chromium.org/683413003

Cr-Commit-Position: refs/heads/master@{#24971}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24971 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=chromium:424142
LOG=N
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/692453002

Cr-Commit-Position: refs/heads/master@{#24970}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24970 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The big change here is to split out each key type into its own
benchmark suite, since optimizations for different key types
are likely to be disjoint. ForEach tests have also been split
into separate "Iteration" suites, again with the thought that
iteration performance is likely separable from key type.

As part of adding the new tests, rejiggered the existing tests:
  - Map.set and Set.add (along with their Weak variants) no longer
    include construction costs in their scores
  - Moved key logic into the shared common.js

R=arv@chromium.org, machenbach@chromium.org

Review URL: https://codereview.chromium.org/685753004

Cr-Commit-Position: refs/heads/master@{#24969}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24969 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/685773002

Cr-Commit-Position: refs/heads/master@{#24968}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24968 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/687163003

Cr-Commit-Position: refs/heads/master@{#24967}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24967 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit r24964.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/687163002

Cr-Commit-Position: refs/heads/master@{#24966}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24966 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts r24964.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/689593002

Cr-Commit-Position: refs/heads/master@{#24965}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24965 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ulan@chromium.org
BUG=chromium:424142
LOG=N

Review URL: https://codereview.chromium.org/685753002

Cr-Commit-Position: refs/heads/master@{#24964}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24964 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

commit r24934.

original commit message:

  This adds the properties to the prototype and the constructor.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/682123004

Patch from Chunyang Dai <chunyang.dai@intel.com>.

Cr-Commit-Position: refs/heads/master@{#24963}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24963 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=titzer@chromium.org

Review URL: https://codereview.chromium.org/685083002

Cr-Commit-Position: refs/heads/master@{#24962}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24962 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r24927.

original commit message:

 Use shared function info for eval cache key.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/689543002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

Cr-Commit-Position: refs/heads/master@{#24961}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24961 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=jkumerrow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/683363002

Cr-Commit-Position: refs/heads/master@{#24960}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24960 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/684893002

Cr-Commit-Position: refs/heads/master@{#24959}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24959 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=ishell@chromium.org
BUG=

Review URL: https://codereview.chromium.org/669663003

Cr-Commit-Position: refs/heads/master@{#24958}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24958 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This analysis computes the set of variables that are assigned in each loop. This is useful to avoid creating redundant loop phis when building an SSA graph, which just waste memory and require analysis to get rid of.

This CL implements an AST walk for the analysis and plugs the result into the TurboFan graph builder. I left this analysis under a flag for A/B testing and until sufficient unit tests can be developed.

R=danno@chromium.org, mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/656123005

Cr-Commit-Position: refs/heads/master@{#24957}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24957 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r24942 (c5055ce)

Original commit message:
Also add backend flags that tell whether integer division/modulus is
generally safe, i.e. does not trap on overflow or divide by zero.

TEST=unittests
BUG=
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/679393003

Cr-Commit-Position: refs/heads/master@{#24956}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24956 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

That broke webkit_unit_tests on ARM64.

BUG=chromium:427746
LOG=Y
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/683113003

Cr-Commit-Position: refs/heads/master@{#24955}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24955 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org, loislo@chromium.org
LOG=N
BUG=Non

Review URL: https://codereview.chromium.org/681333003

Cr-Commit-Position: refs/heads/master@{#24954}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24954 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This caused some performance regressions on Octane.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/663333005

Cr-Commit-Position: refs/heads/master@{#24953}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24953 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

A FeedbackNexus is the combination of a feedback vector, a slot(s) in
the vector, along with methods to query and manipulate that information
in a type-correct way.

A CallIC will have a CallICNexus, a LoadIC a LoadICNexus, etc.,
reflecting the fact that different types of ICs configure their data
in unique ways.

This CL limits itself to introducing and using the nexus type only for
CallICs. A follow-up will use them for Load and KeyedLoadICs for the
case when the --vector-ics flag is turned on.

The notion of a Nexus is also embedded at the lowest level of the IC
class. This makes sense because more ICs should become vector-based
in the future.

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/683933002

Cr-Commit-Position: refs/heads/master@{#24952}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24952 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r24934 (279833c)

Original commit message:
This adds the properties to the prototype and the constructor.

BUG=v8:3330
LOG=Y
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/687633002

Cr-Commit-Position: refs/heads/master@{#24951}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24951 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r24927 (244472a)

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/681303002

Cr-Commit-Position: refs/heads/master@{#24950}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24950 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rodolph.perfetta@arm.com, ulan@chromium.org

Review URL: https://codereview.chromium.org/678313002

Cr-Commit-Position: refs/heads/master@{#24949}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24949 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit 63fd24a7c0782ccc3221803e3a2740f1e1b92ceb. Broke compilation on Mac.

TBR=loislo@chromium.org, yangguo@chromium.org

Review URL: https://codereview.chromium.org/684883002

Cr-Commit-Position: refs/heads/master@{#24948}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24948 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit r24945.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/683883002

Cr-Commit-Position: refs/heads/master@{#24947}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24947 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

LOG=N
BUG=None
R=loislo@chromium.org, yangguo@chromium.org

Review URL: https://codereview.chromium.org/680343002

Cr-Commit-Position: refs/heads/master@{#24946}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24946 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

A FeedbackNexus is the combination of a feedback vector, a slot(s) in
the vector, along with methods to query and manipulate that information
in a type-correct way.

A CallIC will have a CallICNexus, a LoadIC a LoadICNexus, etc.,
reflecting the fact that different types of ICs configure their data
in unique ways.

This CL limits itself to introducing and using the nexus type only for
CallICs. A follow-up will use them for Load and KeyedLoadICs for the
case when the --vector-ics flag is turned on.

The notion of a Nexus is also embedded at the lowest level of the IC
class. This makes sense because more ICs should become vector-based
in the future.

This CL is based on https://codereview.chromium.org/679073002/ which
should land first.

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/680883004

Cr-Commit-Position: refs/heads/master@{#24945}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24945 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/687653002

Cr-Commit-Position: refs/heads/master@{#24944}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24944 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=3655
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/687453004

Cr-Commit-Position: refs/heads/master@{#24943}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24943 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also add backend flags that tell whether integer division/modulus is
generally safe, i.e. does not trap on overflow or divide by zero.

TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/681133004

Cr-Commit-Position: refs/heads/master@{#24942}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24942 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/674913002

Cr-Commit-Position: refs/heads/master@{#24941}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24941 ce2b1a6d-e550-0410-aec6-3dcde31c8c00