This adds an "experimental" API hook (v8::ScriptCompiler::CompileModule)
allowing compilation of modules. The code gen is incredibly basic: the
module body is represented by a Block in the AST. But this at least gets
more of the pipeline working, and opens the door to writing mjsunit tests
(once d8 is modified to support module compilation).

BUG=v8:1569
LOG=n

Review URL: https://codereview.chromium.org/902093002

Cr-Commit-Position: refs/heads/master@{#26496}

BTW: a few fixes for string comparison

BUG=none
LOG=n

Review URL: https://codereview.chromium.org/892953004

Cr-Commit-Position: refs/heads/master@{#26495}

Previously it just had hacks to have NULLs instead of them and pretended to know
nothing about Zone. The hacks provide no real benefit (probably historically
based on some weird misconception about the relationship between Zone and
Isolate), and make it harder for the PreParser to start to know more about
variables and scoping.

BUG=

Review URL: https://codereview.chromium.org/909463003

Cr-Commit-Position: refs/heads/master@{#26494}

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/886733005

Cr-Commit-Position: refs/heads/master@{#26493}

Review URL: https://codereview.chromium.org/893843004

Cr-Commit-Position: refs/heads/master@{#26492}

BUG=chromium:425035
R=dcarney@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/892413006

Cr-Commit-Position: refs/heads/master@{#26491}

R=jochen@chromium.org
BUG=chromium:441896
LOG=N

Review URL: https://codereview.chromium.org/909473002

Cr-Commit-Position: refs/heads/master@{#26490}

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/909463002

Cr-Commit-Position: refs/heads/master@{#26489}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/878743006

Cr-Commit-Position: refs/heads/master@{#26488}

BUG=
R=mstarzinger@chromium.org, weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/879693005

Cr-Commit-Position: refs/heads/master@{#26487}

R=dcarney@chromium.org
BUG=v8:3872
LOG=n

Review URL: https://codereview.chromium.org/887013003

Cr-Commit-Position: refs/heads/master@{#26486}

Recipe: Add "const" to RawMachineAssembler constructor, fix breakage.

Review URL: https://codereview.chromium.org/874693006

Cr-Commit-Position: refs/heads/master@{#26485}

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/900033003

Cr-Commit-Position: refs/heads/master@{#26484}

R=arv@chromium.org
BUG=v8:3834
LOG=N

Review URL: https://codereview.chromium.org/885643004

Cr-Commit-Position: refs/heads/master@{#26483}

R=svenpanne@chromium.org
BUG=chromium:441896
LOG=N

Review URL: https://codereview.chromium.org/866553003

Cr-Commit-Position: refs/heads/master@{#26482}

R=verwaest@chromium.org

BUG=

Review URL: https://codereview.chromium.org/901923002

Cr-Commit-Position: refs/heads/master@{#26481}

Review URL: https://codereview.chromium.org/898283003

Cr-Commit-Position: refs/heads/master@{#26480}

Review URL: https://codereview.chromium.org/904693002

Cr-Commit-Position: refs/heads/master@{#26479}

BUG=v8:3872
LOG=n
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/900223006

Cr-Commit-Position: refs/heads/master@{#26478}

  Fix the failure introduced by 0381acf7 (r26213).

  When storing Double field to external double array, we need to do special
  qNaN --> sNan recovery on X87 port.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/879693006

Cr-Commit-Position: refs/heads/master@{#26477}

BUG=v8:3872
LOG=n
R=verwaest@chromium.org

Committed: https://chromium.googlesource.com/v8/v8/+/49cbe537e715c960fb9773af2e240133726f465b

Review URL: https://codereview.chromium.org/887073007

Cr-Commit-Position: refs/heads/master@{#26476}

BUG=v8:3872
LOG=n
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/887073007

Cr-Commit-Position: refs/heads/master@{#26475}

Rolling v8/tools/clang to 6f9d79914087cffd820021c3bb1155ad44f4b435

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/904793003

Cr-Commit-Position: refs/heads/master@{#26474}

Port 2491a639

BUG=

Review URL: https://codereview.chromium.org/888143004

Cr-Commit-Position: refs/heads/master@{#26473}

This also removes some convenience functions that were not used.

BUG=v8:3700
LOG=N
R=adamk@chromium.org, adamk

Review URL: https://codereview.chromium.org/883073008

Cr-Commit-Position: refs/heads/master@{#26472}

Contribution of PowerPC port (continuation of 422063005, 817143002 and 866843003)
This patch brings the ppc directories up to date with our repo. We have
removed 5 individual optimizations which require changes in both the ppc and common
directories so they can be more easily reviewed on their own in subsequent patches.

Subsequent patches will cover:
- individual optimizations for PPC (5)
- remaining AIX changes not resolved by 4.8 compiler (4.8 is only recently available
for AIX)
- incremental updates required to ppc directories due to platform specific changes
made in google repos while we complete the above steps.

With the update there are still some timeouts seen when run in simulated mode which
may be a result of the missing optimizations.  Once we have the optimizations in
we will review the simulation results and address/exclude tests as necessary so that
the simulated runs are clean.

	new file:   src/compiler/ppc/code-generator-ppc.cc
	new file:   src/compiler/ppc/instruction-codes-ppc.h
	new file:   src/compiler/ppc/instruction-selector-ppc.cc
	new file:   src/compiler/ppc/linkage-ppc.cc
	modified:   src/ic/ppc/handler-compiler-ppc.cc
	modified:   src/ic/ppc/ic-compiler-ppc.cc
	modified:   src/ic/ppc/ic-ppc.cc
	modified:   src/ic/ppc/stub-cache-ppc.cc
	modified:   src/ppc/assembler-ppc.cc
	modified:   src/ppc/assembler-ppc.h
	modified:   src/ppc/builtins-ppc.cc
	modified:   src/ppc/code-stubs-ppc.cc
	modified:   src/ppc/code-stubs-ppc.h
	modified:   src/ppc/codegen-ppc.cc
	modified:   src/ppc/constants-ppc.h
	modified:   src/ppc/deoptimizer-ppc.cc
	modified:   src/ppc/disasm-ppc.cc
	modified:   src/ppc/full-codegen-ppc.cc
	modified:   src/ppc/interface-descriptors-ppc.cc
	modified:   src/ppc/lithium-codegen-ppc.cc
	modified:   src/ppc/lithium-codegen-ppc.h
	modified:   src/ppc/lithium-ppc.cc
	modified:   src/ppc/lithium-ppc.h
	modified:   src/ppc/macro-assembler-ppc.cc
	modified:   src/ppc/macro-assembler-ppc.h
	modified:   src/ppc/regexp-macro-assembler-ppc.cc
	modified:   src/ppc/regexp-macro-assembler-ppc.h
	modified:   src/ppc/simulator-ppc.cc
	modified:   src/ppc/simulator-ppc.h
	new file:   test/unittests/compiler/ppc/instruction-selector-ppc-unittest.cc

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

BUG=

Review URL: https://codereview.chromium.org/901083004

Cr-Commit-Position: refs/heads/master@{#26471}

Port 9e086506

TEST=cctest/test-run-jscalls/ReceiverPatching
BUG=

Review URL: https://codereview.chromium.org/904663003

Cr-Commit-Position: refs/heads/master@{#26470}

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/905493002

Cr-Commit-Position: refs/heads/master@{#26469}

BUG=

Review URL: https://codereview.chromium.org/879693004

Cr-Commit-Position: refs/heads/master@{#26468}

Port 634b0f20

BUG=

Review URL: https://codereview.chromium.org/900253002

Cr-Commit-Position: refs/heads/master@{#26467}

R=rossberg@chromium.org
BUG=chromium:452510
LOG=Y

Review URL: https://codereview.chromium.org/893993007

Cr-Commit-Position: refs/heads/master@{#26466}

BUG=

Review URL: https://codereview.chromium.org/905473003

Cr-Commit-Position: refs/heads/master@{#26465}

Looking up and passing this argument is unnecessary.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/898013003

Cr-Commit-Position: refs/heads/master@{#26464}

1) The hardcoded strings were converted into DeoptReason enum.

2) Deopt comment were converted into a pair location and deopt reason entries so
the deopt reason tracking mode would less affect the size of the RelocInfo table and heap.

3) DeoptReason entry in RelocInfo reuses kCommentTag value and generates short entry in RelocInfo table.

BUG=452067
LOG=n

Committed: https://crrev.com/c49820e45b57f128a98690940875c049f612dde6
Cr-Commit-Position: refs/heads/master@{#26434}

Committed: https://crrev.com/ec42e002da03adb2db968dd5b7453341ddc59a5c
Cr-Commit-Position: refs/heads/master@{#26448}

Review URL: https://codereview.chromium.org/874323003

Cr-Commit-Position: refs/heads/master@{#26463}

Review URL: https://codereview.chromium.org/884163004

Cr-Commit-Position: refs/heads/master@{#26462}

This way we can ship \u{..} escapes in strings / identifiers before shipping /u
regexps.

BUG=

Review URL: https://codereview.chromium.org/903703002

Cr-Commit-Position: refs/heads/master@{#26461}

It doesn't do anything for now, but it implies strict mode. Added tests to
test-parsing.cc to test that.

BUG=

Review URL: https://codereview.chromium.org/898983002

Cr-Commit-Position: refs/heads/master@{#26460}

Make sure the initial graph is fully populated with source position information and automatically propagate that information down through newly allocated nodes during reduction passes in the most unobtrusive way that's currently possible.

Review URL: https://codereview.chromium.org/897883002

Cr-Commit-Position: refs/heads/master@{#26459}

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-455644
BUG=chromium:455644
LOG=N

Review URL: https://codereview.chromium.org/880443004

Cr-Commit-Position: refs/heads/master@{#26458}

Revert of Externalize deoptimization reasons. (patchset #7 id:120001 of https://codereview.chromium.org/874323003/)

Reason for revert:
This CL breaks RelocInfo::INTERNAL_REFERENCE (and maybe others that come after DEOPT_REASON), which is currently (mostly) unused on tip-of-tree, but will be used for jump tables soon(ish) and should therefore work. It seems to be a problem with implicitly assumptions about the number of reloc info modes. Needs further investigation.

Original issue's description:
> Externalize deoptimization reasons.
>
> 1) The hardcoded strings were converted into DeoptReason enum.
>
> 2) Deopt comment were converted into a pair location and deopt reason entries so
> the deopt reason tracking mode would less affect the size of the RelocInfo table and heap.
>
> 3) DeoptReason entry in RelocInfo reuses kCommentTag value and generates short entry in RelocInfo table.
>
> BUG=452067
> LOG=n
>
> Committed: https://crrev.com/c49820e45b57f128a98690940875c049f612dde6
> Cr-Commit-Position: refs/heads/master@{#26434}
>
> Committed: https://crrev.com/ec42e002da03adb2db968dd5b7453341ddc59a5c
> Cr-Commit-Position: refs/heads/master@{#26448}

TBR=alph@chromium.org,mstarzinger@chromium.org,svenpanne@chromium.org,yurys@chromium.org,loislo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=452067

Review URL: https://codereview.chromium.org/900223002

Cr-Commit-Position: refs/heads/master@{#26457}