Technically, this is https://codereview.chromium.org/571173003/ from Andrew Low <andrew_low@ca.ibm.com>.

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/714093002

Cr-Commit-Position: refs/heads/master@{#25255}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25255 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=tandrii@chromium.org

Review URL: https://codereview.chromium.org/716713002

Cr-Commit-Position: refs/heads/master@{#25254}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25254 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

MapCache simplification. It is now a FixedArray that maps number of properties to a WeakCell with a Map.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/712943002

Cr-Commit-Position: refs/heads/master@{#25253}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25253 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Revert "Fixes for Windows and Mac builds after r25250."
TBR=ishell@chromium.org

Review URL: https://codereview.chromium.org/699613004

Cr-Commit-Position: refs/heads/master@{#25252}
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R=verwaest@chromium.org
TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/717573002

Cr-Commit-Position: refs/heads/master@{#25251}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25251 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This CL introduces LayoutDescriptor which is responsible for tracking which in-object fields are tagged and which are not.
LayoutDescriptor field added to Map. Currently unboxing is disabled.

R=hpayer@chromium.org, verwaest@chromium.org

Review URL: https://codereview.chromium.org/391693002

Cr-Commit-Position: refs/heads/master@{#25250}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25250 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=chromium:431602
LOG=y
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/714663002

Cr-Commit-Position: refs/heads/master@{#25249}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25249 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Lowering of NumberToUint32 and NumberToInt32 was not correctly accounting for the sign of the input and the sign of the output, emitting the wrong representation changes.

Along the way, I've found cases where MachineOperatorBuilder would break if fed a machine type for loads or stores that was not cached, requiring MachineOperatorBuilder to take zone to allocate operators for these cases.

R=bmeurer@chromium.org, jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/714613002

Cr-Commit-Position: refs/heads/master@{#25247}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25247 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The outcomes are saved as a set and need to be converted into
a list to be json-serializable.

TBR=tandrii@chromium.org

Review URL: https://codereview.chromium.org/710073002

Cr-Commit-Position: refs/heads/master@{#25246}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25246 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Select lowering must not merge Select nodes that depend on each other,
because the resulting graph is not schedulable.

TEST=unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/709423003

Cr-Commit-Position: refs/heads/master@{#25245}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25245 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=chromium:408523
LOG=n
TBR=tandrii@chromium.org
TEST=script_test.py

Review URL: https://codereview.chromium.org/710593003

Cr-Commit-Position: refs/heads/master@{#25244}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25244 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The mips related gyp variables and compiler flags for webview
and chromium builds are set externally. The CL ensures this
behaviour and prevents conflicts in configuration with standalone builds.

TEST=
BUG=
R=jkummerow@chromium.org, paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/707883002

Cr-Commit-Position: refs/heads/master@{#25243}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25243 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jarin@chromium.org

BUG=

Review URL: https://codereview.chromium.org/713803002

Cr-Commit-Position: refs/heads/master@{#25242}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25242 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/686883003

Cr-Commit-Position: refs/heads/master@{#25241}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25241 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=dslomov@chromium.org
BUG=v8:2198
LOG=N

Review URL: https://codereview.chromium.org/716523002

Cr-Commit-Position: refs/heads/master@{#25240}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25240 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit cf08e8d7 for
breaking Embenchen bullet.

TBR=jarin@chromium.org

Review URL: https://codereview.chromium.org/684413003

Cr-Commit-Position: refs/heads/master@{#25238}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25238 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/681113011

Cr-Commit-Position: refs/heads/master@{#25237}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25237 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Select lowering must not merge Select nodes that depend on each other,
because the resulting graph is not schedulable.

TEST=unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/717473002

Cr-Commit-Position: refs/heads/master@{#25236}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25236 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=tandrii@chromium.org

Review URL: https://codereview.chromium.org/713463002

Cr-Commit-Position: refs/heads/master@{#25235}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25235 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/713813002

Cr-Commit-Position: refs/heads/master@{#25233}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25233 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ulan@chromium.org
BUG=v8:3634
LOG=N

Review URL: https://codereview.chromium.org/682413004

Cr-Commit-Position: refs/heads/master@{#25231}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25231 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port 6412c8ba70f2331aae0f21b968dd051b2320b947 (r25207)

original commit message:

  Try avoiding MISS for callic monomorphic case.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/713743003

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

Cr-Commit-Position: refs/heads/master@{#25230}
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The trouble is that the AsHandle method can allocate and thus
invoke GC, which could empty the table while we are updating it.

BUG=chromium:430880
LOG=N
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/700913003

Cr-Commit-Position: refs/heads/master@{#25229}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25229 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TEST=cctest,msjunit/asm,unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/709123005

Cr-Commit-Position: refs/heads/master@{#25228}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25228 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port b6737c56eaf51d63ab83b6529f657c15f834623c (r25187)

original commit message:

  Turn ToNumberStub into a PlatformCodeStub again.

  The HydrogenCodeStub is too expensive and there's no easy way to reduce
  this cost, so turning it into a PlatformCodeStub solves that problem until
  we can use TurboFan for code stubs.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/714573003

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

Cr-Commit-Position: refs/heads/master@{#25227}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25227 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

 The incorrect parameter number is set when recording safepoint.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/716463003

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

Cr-Commit-Position: refs/heads/master@{#25226}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25226 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Remove the forced alignment of csp to 16 byte values on Nvidia chips.
Benchmarks on current devices show that this is no longer required.

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

Review URL: https://codereview.chromium.org/710613002

Cr-Commit-Position: refs/heads/master@{#25225}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25225 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit e1f23eab4255d63344011dfb885b8e8962cb60e2.

Broke cctest/test-heap/ReleaseOverReservedPages on a bunch of builders

http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/928/steps/Check/logs/ReleaseOverReservedPa..

BUG=None
LOG=N
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/709123002

Cr-Commit-Position: refs/heads/master@{#25224}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25224 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Add MemoryOperandMatcher that recognizes node clusters in the form
[%r1 + %r2*SCALE + OFFSET] and explicit support in the x64 Int32Add
selector to use it to translate complex adds to 'leal' instructions.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/704713003

Cr-Commit-Position: refs/heads/master@{#25223}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25223 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Introduce two new function kind, one for default constructor and one
for default constructor call super. Then when we are about to pares
these we just generate the correct AST in source.

BUG=v8:3661, v8:3672
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/700523003

Cr-Commit-Position: refs/heads/master@{#25222}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25222 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

(1) When we have just normalized and re-fastified a map, we don't need to copy it again to set the is_prototype bit.
(2) When defining accessors causes a non-prototype object to go slow, don't force re-fastification.

BUG=v8:3267
LOG=n
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/706243002

Cr-Commit-Position: refs/heads/master@{#25221}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25221 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This implements correct semantics for "extensible" top level lexical scope.
The entire lexical scope is represented at runtime by GlobalContextTable, reachable from native context and accumulating global contexts from every script loaded into the context.

When the new script starts executing, it does the following validation:
- checks the GlobalContextTable and global object (non-configurable own) properties against the set of declarations it introduces and reports potential conflicts.
- invalidates the conflicting PropertyCells on global object, so that any code depending on them will miss/deopt causing any contextual lookups to be reexecuted under the new bindings
- adds the lexical bindings it introduces to the GlobalContextTable

Loads and stores for contextual lookups are modified so that they check the GlobalContextTable before looking up properties on global object, thus implementing the shadowing of global object properties by lexical declarations.

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

Review URL: https://codereview.chromium.org/705663004

Cr-Commit-Position: refs/heads/master@{#25220}
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R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/694533003

Cr-Commit-Position: refs/heads/master@{#25219}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25219 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port c01061044028f7a31ba51496e44900481005eb38
Port r25207

BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/684653007

Cr-Commit-Position: refs/heads/master@{#25218}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25218 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jarin@chromium.org
TEST=cctest/test-scheduler/NestedFloatingDiamondWithLoop

Review URL: https://codereview.chromium.org/706123003

Cr-Commit-Position: refs/heads/master@{#25217}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25217 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Happily, this fixes WIN64 failures too.

BUG=
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/709033002

Cr-Commit-Position: refs/heads/master@{#25216}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25216 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The spec explicitly forbids them. V8 never handled them properly either, just
the Scanner accepted them (it had code to add them literally to the
LiteralBuffer) and later on, Regexp constructor disallowed them.

According to the spec, unicode escapes in regexp flags should be an early error
("It is a Syntax Error if IdentifierPart contains a Unicode escape sequence.").

Note that Scanner is still more relaxed about regexp flags than the
spec. Especially, it accepts any identifier parts (not just a small set of
letters) and doesn't check for duplicates.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/700373003

Cr-Commit-Position: refs/heads/master@{#25215}
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BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/707443003

Cr-Commit-Position: refs/heads/master@{#25214}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25214 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/712563002

Cr-Commit-Position: refs/heads/master@{#25213}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25213 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/679363003

Cr-Commit-Position: refs/heads/master@{#25212}
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