Do away with variable length memcpy to Set/Get registers in simulator

About a 32% boost.

Before - 5:31

Richards: 84.5
DeltaBlue: 128
Crypto: 65.3
RayTrace: 203
EarleyBoyer: 149
RegExp: 23.4
Splay: 121
NavierStokes: 98.9
----
Score (version 7): 93.8

After - 4:10

Richards: 107
DeltaBlue: 175
Crypto: 93.9
RayTrace: 258
EarleyBoyer: 186
RegExp: 32.7
Splay: 165
NavierStokes: 124
----
Score (version 7): 124

R=jacob.bramley@arm.com, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/213943002

Patch from Fritz Koenig <frkoenig@google.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21448 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "Do away with variable length memcpy to Set/Get registers in simulator"

This reverts r21148, it broke tests in debug mode, e.g.
mjsunit/regress/regress-observe-map-cache or mjsunit/debug-stepout-scope-part5.

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/296823014

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21449 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove dummy harmony-promises flag

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

Review URL: https://codereview.chromium.org/292723002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21450 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add a bunch of files in my checkout to .gitignore

BUG=none
TBR=machenbach@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/296453020

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21451 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Use the flow engine for HMergeRemovableSimulatesPhase.

For now, this is a 1:1 reformulation of the block-local analysis, but
this will change.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/294473015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21452 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
If map was deprecated, abort compilation and allow re-compilation.

Also print a message if either map became unstable or map was
deprecated, if --trace-opt is enabled.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/292323005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21453 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix compilation errors.

TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/291343006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21454 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Drop gitignore entry for now obsolete test262 archive

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

Review URL: https://codereview.chromium.org/300453003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21455 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Make v8::TryCatch able to consume natively thrown exceptions (again).

R=yangguo@chromium.org
BUG=chromium:362388
TEST=cctest/test-api/TryCatchNative
LOG=N

Review URL: https://codereview.chromium.org/291393002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21456 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Reland r21442 "Inobject slack tracking is done on a per-closure basis instead of per-shared info basis."
This fixes inobject slack tracking for prototype inheritance pattern that uses closures.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/292183008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21457 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Avoid dynamic initial map check when inlining call-new.

This improves check elimination and removes a load plus
a map check for every inlined call-new.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/293223002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21458 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
ARM64 simulator fix for EXTR

Fixes extract when imms = 0 because a left shift of 64 is not valid.

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

Review URL: https://codereview.chromium.org/286193004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21459 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Support ES6 weak collections in heap profiler

BUG=chromium:376196
LOG=Y
R=alph@chromium.org, yangguo@chromium.org

Review URL: https://codereview.chromium.org/294163005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21460 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "Make v8::TryCatch able to consume natively thrown exceptions (again)."

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/296133013

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21461 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Tiny steps towards a non-local 'Merge removable simulates' phase.

Distinguish copying/merging of the state. Better tracing.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/299883003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21462 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Skip dead blocks/instructions in store elimination.

Also improve tracing.

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/297933002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21463 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Cleanup after inobject slack tracking improvement.

1) %SetExpectedNumberOfProperties() function removed.
2) Obsolete SharedFunctionInfo::BeforeVisitingPointers() removed.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/289283018

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21464 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Provide a helper to generate multiple Lithium instructions for one Hydrogen instruction.

R=jkummerow@chromium.org, ulan@chromium.org

Review URL: https://codereview.chromium.org/296993002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21465 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Check for cached transition to ExternalArray elements kind.

R=ishell@chromium.org, verwaest@chromium.org
BUG=v8:3337
LOG=Y

Review URL: https://codereview.chromium.org/291193011

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21466 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix representation inference for mutable double boxes.

R=jarin@chromium.org
BUG=v8:3307
TEST=mjsunit/regress/regress-3307
LOG=N

Review URL: https://codereview.chromium.org/298723014

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21467 ce2b1a6d-e550-0410-aec6-3dcde31c8c00