Some native counters (e.g. KeyedLoadGenericSlow) are referenced from stubs that are generated very early in the Isolate lifecycle before v8::Isolate::New returns. Thus counter lookup callback also needs to be installed early prior to v8::internal::Isolate::Init call. Otherwise assembler will just assume that the counter is not enabled and produce no code from IncrementCounter - because address of the counter is not yet available.

Histogram related callbacks are moved for consistency to make them able to collect samples which occur at isolate initialization time.

BUG=

Review URL: https://codereview.chromium.org/1010233002

Cr-Commit-Position: refs/heads/master@{#27262}

BUG=v8:3862
R=hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1014873002

Cr-Commit-Position: refs/heads/master@{#27261}

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/1015053002

Cr-Commit-Position: refs/heads/master@{#27260}

BUG=

Review URL: https://codereview.chromium.org/1012023002

Cr-Commit-Position: refs/heads/master@{#27259}

This is the fifth part of https://codereview.chromium.org/1012633002
In this part we collect the offsets of deopt calls and save it into
an inlined function info.

On the Next:
Later when deopt happens we will get the offset of deopt call and
search it among inlined infos.

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/1011113004

Cr-Commit-Position: refs/heads/master@{#27258}

We also need to fix the weakening to weaken unions with ranges in them.

BUG=

Review URL: https://codereview.chromium.org/1011103003

Cr-Commit-Position: refs/heads/master@{#27257}

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/1015953002

Cr-Commit-Position: refs/heads/master@{#27256}

We were able to remove most of our changes needed to compile
on AIX with an earlier compiler level.  These changes are the
remaining ones.

The changes in heap/heap.cc are needed because otherwise the
compiler complains that result is potentially used before
it is initialized.

The changes in heap/mark-compact.cc are required because
AIX supports the full 64 bit address range so the check
being guarded is invalid.

The changes in build/toolchain.gypi and
test/cctest/cctest/gyp are aix only and are adjust the
compile/link options to allow the AIX build to succeed.

	modified:   build/toolchain.gypi
	modified:   src/heap/heap.cc
	modified:   src/heap/mark-compact.cc
	modified:   test/cctest/cctest.gyp

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

BUG=

Review URL: https://codereview.chromium.org/1013833002

Cr-Commit-Position: refs/heads/master@{#27255}

- We don't have clang for PPC, force use of gcc.
- Changes needed to compile/build on AIX with gcc 4.8.3 missed
from last review

	modified:   build/standalone.gypi

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

BUG=

Review URL: https://codereview.chromium.org/1018543003

Cr-Commit-Position: refs/heads/master@{#27254}

CpuProfiler: x64. put right address to the stack, so the callee would be able to resolve it into the right deopt_info.

'from' is using for Code object lookup and will be used for
inline_id lookup. see https://codereview.chromium.org/1012633002
So we should be able to map it.

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/1012743002

Cr-Commit-Position: refs/heads/master@{#27253}

CpuProfiler: ia32. put right address to the stack, so the callee would be able to resolve it into the right deopt_info.

'from' is using for Code object lookup and will be used for
inline_id lookup. see https://codereview.chromium.org/1012633002
So we should be able to map it.

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/1014783002

Cr-Commit-Position: refs/heads/master@{#27252}

CpuProfiler: x87. put right address to the stack, so the callee would be able to resolve it into the right deopt_info.

'from' is using for Code object lookup and will be used for
inline_id lookup. see https://codereview.chromium.org/1012633002
So we should be able to map it.

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/1013243002

Cr-Commit-Position: refs/heads/master@{#27251}

- Use representation information provided by the type system to skip SMI
  checks.
- Fix combining of ChangeTaggedToFloat64 with JSToNumber now that JS
  operators can produce control.
- Remove the unnecessary abstraction of smi/field offsets.
- Improve unit test coverage.
- Various cosmetic fixes.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/1018873002

Cr-Commit-Position: refs/heads/master@{#27250}

Define V8_TARGET_ARCH_MIPS or V8_TARGET_ARCH_MIPS64 if the target
arch is mipsel or mips64el.

R=dpranke@chromium.org,jochen@chromium.org,machenbach@chromium.org
BUG=v8:3972
LOG=N

Review URL: https://codereview.chromium.org/1016923002

Cr-Commit-Position: refs/heads/master@{#27249}

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1014853002

Cr-Commit-Position: refs/heads/master@{#27248}

this is a fourth part of https://codereview.chromium.org/1012633002

In another patch I'll collect the inlining tree in cpu-profiler CodeEntry
Each leaf for an inlined function will have a list of deopts and their pc offsets.
So when deopt happens I'll be able to map the deopt pc_offset into
inlined function id and point the web developer to the exact place
where deopt has happened even if it was in the inlined function.

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/1013753007

Cr-Commit-Position: refs/heads/master@{#27247}

In constructing the transfer between loop copies, we need to merge the backedges from all the previous copies of the given loop. The control reduction will work out which ones are really reachable.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1004993004

Cr-Commit-Position: refs/heads/master@{#27246}

TEST=cctest/test-branch-combine
BUG=

Review URL: https://codereview.chromium.org/1017733002

Cr-Commit-Position: refs/heads/master@{#27245}

Add mips support for the changes in https://codereview.chromium.org/1000373003. On mips, these support the long-branch mechanism.

TEST=test-serialize/SerializeToplevelLargeCodeObject
BUG=

Review URL: https://codereview.chromium.org/1014763003

Cr-Commit-Position: refs/heads/master@{#27244}

This ensures that there is only one stub that deals with unwinding the
stack. Having more than one place containing that logic is brittle and
error prone, especially when it is a corner case only for RangeErrors.

R=titzer@chromium.org
TEST=mjsunit/regress/regress-crbug-467047
BUG=chromium:467047
LOG=N

Review URL: https://codereview.chromium.org/1012103002

Cr-Commit-Position: refs/heads/master@{#27243}

BUG=v8:3969
LOG=NO
TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1016743003

Cr-Commit-Position: refs/heads/master@{#27242}

The cause was dynamic allocation of an accounting structure used to
create/initialize the type feedback vector, done at the end of the
numbering pass. The solution is to Zone-allocate the structure to
bring it's lifetime in line with the compilation unit.

BUG=

Review URL: https://codereview.chromium.org/1014793003

Cr-Commit-Position: refs/heads/master@{#27241}

The evaluation order of receiver versus arguments is not properly
defined by C++. This caused issues with Clang where the environment
changed after the receiveing environment was already loaded.

R=jarin@chromium.org
BUG=chromium:467531
LOG=N

Review URL: https://codereview.chromium.org/1011123002

Cr-Commit-Position: refs/heads/master@{#27240}

additionally, remove unnecessary deopts when transitioning to global accessor properties from data properties

R=verwaest@chromium.org

BUG=

Review URL: https://codereview.chromium.org/996133002

Cr-Commit-Position: refs/heads/master@{#27239}

The evaluation order of receiver versus arguments is not properly
defined by C++. This caused issues with Clang where the environment
changed after the receiveing environment was already loaded.

R=jarin@chromium.org
BUG=chromium:467531
TEST=mjsunit/regress/regress-crbug-467531
LOG=N

Review URL: https://codereview.chromium.org/1015683002

Cr-Commit-Position: refs/heads/master@{#27238}

Ranges and bitset types now work together, so we don't need these weird
hacks anymore.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/994283005

Cr-Commit-Position: refs/heads/master@{#27237}

R=svenpanne@chromium.org
BUG=v8:3929
LOG=n

Review URL: https://codereview.chromium.org/1010803008

Cr-Commit-Position: refs/heads/master@{#27236}

A hydrogen code stub is not the best approach because it builds a frame
and doesn't have the technology to discard roots at tail call exits.
Platform-specific stubs provide much better performance at this point.

R=verwaest@chromium.org

BUG=

Review URL: https://codereview.chromium.org/988653003

Cr-Commit-Position: refs/heads/master@{#27235}

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/1011703003

Cr-Commit-Position: refs/heads/master@{#27234}

BUG=v8:3664
LOG=NO

Review URL: https://codereview.chromium.org/1009343002

Cr-Commit-Position: refs/heads/master@{#27233}

This change introduces a liveness analyzer for local variables in frame states.

The main idea is to use the AstGraphBuilder::Environment class to build the control flow graph, and record local variable loads, stores and checkpoints in the CFG basic blocks (LivenessAnalyzerBlock class).

After the graph building finishes, we run a simple data flow analysis over the CFG to figure out liveness of each local variable at each checkpoint. Finally, we run a pass over all the checkpoints and replace dead local variables in the frame states with the 'undefined' value.

Performance numbers for Embenchen are below.

----------- box2d.js
Current --turbo-deoptimization: EmbenchenBox2d(RunTime): 11265 ms.
d8-master --turbo-deoptimization: EmbenchenBox2d(RunTime): 11768 ms.
d8-master: EmbenchenBox2d(RunTime): 10996 ms.
----------- bullet.js
Current --turbo-deoptimization: EmbenchenBullet(RunTime): 17049 ms.
d8-master --turbo-deoptimization: EmbenchenBullet(RunTime): 17384 ms.
d8-master: EmbenchenBullet(RunTime): 16153 ms.
----------- copy.js
Current --turbo-deoptimization: EmbenchenCopy(RunTime): 4877 ms.
d8-master --turbo-deoptimization: EmbenchenCopy(RunTime): 4938 ms.
d8-master: EmbenchenCopy(RunTime): 4940 ms.
----------- corrections.js
Current --turbo-deoptimization: EmbenchenCorrections(RunTime): 7068 ms.
d8-master --turbo-deoptimization: EmbenchenCorrections(RunTime): 6718 ms.
d8-master: EmbenchenCorrections(RunTime): 6858 ms.
----------- fannkuch.js
Current --turbo-deoptimization: EmbenchenFannkuch(RunTime): 4167 ms.
d8-master --turbo-deoptimization: EmbenchenFannkuch(RunTime): 4608 ms.
d8-master: EmbenchenFannkuch(RunTime): 4149 ms.
----------- fasta.js
Current --turbo-deoptimization: EmbenchenFasta(RunTime): 9981 ms.
d8-master --turbo-deoptimization: EmbenchenFasta(RunTime): 9848 ms.
d8-master: EmbenchenFasta(RunTime): 9640 ms.
----------- lua_binarytrees.js
Current --turbo-deoptimization: EmbenchenLuaBinaryTrees(RunTime): 11571 ms.
d8-master --turbo-deoptimization: EmbenchenLuaBinaryTrees(RunTime): 13089 ms.
d8-master: EmbenchenLuaBinaryTrees(RunTime): 10957 ms.
----------- memops.js
Current --turbo-deoptimization: EmbenchenMemOps(RunTime): 7766 ms.
d8-master --turbo-deoptimization: EmbenchenMemOps(RunTime): 7346 ms.
d8-master: EmbenchenMemOps(RunTime): 7738 ms.
----------- primes.js
Current --turbo-deoptimization: EmbenchenPrimes(RunTime): 7459 ms.
d8-master --turbo-deoptimization: EmbenchenPrimes(RunTime): 7453 ms.
d8-master: EmbenchenPrimes(RunTime): 7451 ms.
----------- skinning.js
Current --turbo-deoptimization: EmbenchenSkinning(RunTime): 15564 ms.
d8-master --turbo-deoptimization: EmbenchenSkinning(RunTime): 15611 ms.
d8-master: EmbenchenSkinning(RunTime): 15583 ms.
----------- zlib.js
Current --turbo-deoptimization: EmbenchenZLib(RunTime): 10825 ms.
d8-master --turbo-deoptimization: EmbenchenZLib(RunTime): 11180 ms.
d8-master: EmbenchenZLib(RunTime): 10823 ms.

BUG=

Review URL: https://codereview.chromium.org/949743002

Cr-Commit-Position: refs/heads/master@{#27232}

the third part of the patch https://codereview.chromium.org/1012633002

this patch
1) moves DeoptInfo builder code to platform independent file lithium-codegen.cc
2) adds inlining_id property to HEnterInlined so we can use it on lithium level.

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/1011733005

Cr-Commit-Position: refs/heads/master@{#27231}

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/1008923003

Cr-Commit-Position: refs/heads/master@{#27230}

R=svenpanne@chromium.org
BUG=v8:3929
LOG=n

Review URL: https://codereview.chromium.org/1017663002

Cr-Commit-Position: refs/heads/master@{#27229}

Rolling v8/build/gyp to d174d75bf69c682cb62af9187879e01513b35e52

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1014683004

Cr-Commit-Position: refs/heads/master@{#27228}

Improve the code generated for construction of a 64-bit floating point
number from two 32-bit integers.

Previously, this moved FP->core, inserted, then moved core->FP for each
half. Now, we construct the double in an X register and move core->FP.
Typically, the temporary register aliases the input register, so the
sequence improves from six to two instructions.

Patch from Martyn Capewell <m.m.capewell@googlemail.com>.

BUG=

Review URL: https://codereview.chromium.org/1008003004

Cr-Commit-Position: refs/heads/master@{#27227}

Tiny cleanup on the way...

Review URL: https://codereview.chromium.org/1007283006

Cr-Commit-Position: refs/heads/master@{#27226}

The feature itself is still behind a flag.

BUG=v8:3862
R=hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1014503003

Cr-Commit-Position: refs/heads/master@{#27225}

CpuProfiler: replace FLAG_hydrogen_track_positions with is_tracking_positions method on CompilationInfo

this is the second part of https://codereview.chromium.org/1012633002.

almost mechanical change.
I'd like to enable positions tracking when cpu profiler is working.
But I'll switch it on for cpu-profiler in another patch.

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/995183005

Cr-Commit-Position: refs/heads/master@{#27224}

BUG=chromium:467481
LOG=Y

Review URL: https://codereview.chromium.org/1009933002

Cr-Commit-Position: refs/heads/master@{#27223}