Moves the accumulator value on-heap to be restored in the
InterpreterNotifyDeopt handler rather than explicitly
setting the accumulator register. This allows it to be
materialized correctly if required.

BUG=v8:4678
LOG=N

Review URL: https://codereview.chromium.org/1707133003

Cr-Commit-Position: refs/heads/master@{#34113}

Port 2166bd8c

BUG=

Review URL: https://codereview.chromium.org/1708853002

Cr-Commit-Position: refs/heads/master@{#34112}

Implements iterator finalisation by desugaring for-of loops with an additional try-finally wrapper. See comment in parser.cc for details.

Also improved some AST printing facilities while there.

@Ross, I had to disable the bytecode generation test for for-of, because it got completely out of hand after this change (the new bytecode has 150+ lines). See the TODO that I assigned to you.

Patch set 1 is WIP patch by Georg (http://crrev.com/1695583003), patch set 2 relative changes.

@Georg, FYI, I changed the following:

- Moved try-finally out of the loop body, for performance, and in order to be able to handle `continue` correctly.
- Fixed scope management in ParseForStatement, which was the cause for the variable allocation failure.
- Fixed pre-existing zone initialisation bug in rewriter, which caused the crashes.
- Enabled all tests, adjusted a few others, added a couple more.

BUG=v8:2214
LOG=Y

Review URL: https://codereview.chromium.org/1695393003

Cr-Commit-Position: refs/heads/master@{#34111}

This also ports a few changes from run-test.py to make sure
cwd = v8 root directory.

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1707963003

Cr-Commit-Position: refs/heads/master@{#34110}

  Unstructured control flow caused by excpetion leads to a wrong x87 FPU stack
  state in TurboFan's exception handler.

  This patch is to reset the x87 FPU stack state when calling the TurboFan's exception
  handler from the CEntryStub.

BUG=

Review URL: https://codereview.chromium.org/1702383005

Cr-Commit-Position: refs/heads/master@{#34109}

In case when F inlined normal call to G which tail calls H we should not write translation for G for the tail call site.
Otherwise we will see G in a stack trace inside H.

This CL also adds a "megatest" which tests product of the following cases:
1) tail caller is inlined/not-inlined
2) tail callee is inlined/not-inlined
3) tail caller has an arguments adaptor frame above or not
4) tail callee has an arguments adaptor frame above or not
5) tail callee is a normal/bound/proxy function

Note that tests for not yet supported cases are not run for now.

BUG=v8:4698
LOG=N

Review URL: https://codereview.chromium.org/1709583002

Cr-Commit-Position: refs/heads/master@{#34108}

The BufferedRawMachineAssemblerTester caused problems for the
Int64Lowering. Instead we construct a TF graph now which is compiled by
Pipeline::GenerateCodeForTesting.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1702023002

Cr-Commit-Position: refs/heads/master@{#34107}

This downloads a patched version of jsfunfuzz from google
storage (google internal bucket) as a hook on demand.

Similar to the gcmole approach from
https://codereview.chromium.org/1703533002/

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1706963005

Cr-Commit-Position: refs/heads/master@{#34106}

BUG=v8:4761
LOG=y

Review URL: https://codereview.chromium.org/1706823003

Cr-Commit-Position: refs/heads/master@{#34105}

  The reason:
  Similar to the CL 31552 (https://codereview.chromium.org/1419573007).

  The CL 33972 (https://codereview.chromium.org/1698783002) optimized some JS function in regress-crbug-242924 test case by TurboFan compiler.

  But it will hit the known issue that X87 will change a sNaN to qNaN by default. And then it will fail when comparing the source (sNaN) Hole NaN and
  the result (qNaN) which was expected to be a (sNaN) Hole NaN too.

BUG=

Review URL: https://codereview.chromium.org/1704313003

Cr-Commit-Position: refs/heads/master@{#34104}

Review URL: https://codereview.chromium.org/1711513003

Cr-Commit-Position: refs/heads/master@{#34103}

By short-cutting the DefineOwnProperty machinery similar to how ForceSet
does it, we should get a few cycles out of this heavily used API.

BUG=chromium:569668
R=verwaest@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1702353002

Cr-Commit-Position: refs/heads/master@{#34102}

R=adamk@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1705013002

Cr-Commit-Position: refs/heads/master@{#34101}

  port 32b4bc13 (r34083)

  original commit message:
  This CL introduces two new bytecodes TailCall and TailCallWide.

BUG=

Review URL: https://codereview.chromium.org/1703233003

Cr-Commit-Position: refs/heads/master@{#34100}

This CL adds a TRACE_EVENT where there is an isolated LOG, a HistogramTimer
or a TimerEvent.

Once we have a d8 tracing controller, all TimerEvents will be removed since
they do not provide an added value over TRACE_EVENTs. HistogramTimers will
remain, but their functionality will be limited to Histograms only.

BUG=v8:4562
LOG=N

Review URL: https://codereview.chromium.org/1707563002

Cr-Commit-Position: refs/heads/master@{#34099}

Rolling v8/tools/clang to 893d75d10357b96b4441ca9ffa363654bd2a07df

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review URL: https://codereview.chromium.org/1705413002

Cr-Commit-Position: refs/heads/master@{#34098}

R=machenbach@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1703103002

Cr-Commit-Position: refs/heads/master@{#34097}

Port 32b4bc13

Original commit message:
    This CL introduces two new bytecodes TailCall and TailCallWide.

R=ishell@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4698,v8:4687
LOG=N

Review URL: https://codereview.chromium.org/1705913002

Cr-Commit-Position: refs/heads/master@{#34096}

Revert of Add Scoped Context Info (Isolate) to V8 Traces (patchset #5 id:80001 of https://codereview.chromium.org/1686233002/ )

Reason for revert:
[Sheriff] Breaks arm cross-compile:
https://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug%20builder/builds/7825/

Original issue's description:
> Add Scoped Context Info (Isolate) to V8 Traces
>
> This patch adds the newly added support for contexts in V8 Tracing, as well
> as use it to mark all the entry points for a V8 Isolate.
>
> BUG=v8:4565
> LOG=N
>
> Committed: https://crrev.com/44823c3c6965966c63b7e2e2361d0f2a58d196ea
> Cr-Commit-Position: refs/heads/master@{#34092}

TBR=jochen@chromium.org,fmeawad@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4565

Review URL: https://codereview.chromium.org/1710573002

Cr-Commit-Position: refs/heads/master@{#34095}

We already have a proper abstraction for dealing with subclassable
builtins, namely JSObject::New, so we should use that instead of
inlining this rather complex code sequence multiple times.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/1709563003

Cr-Commit-Position: refs/heads/master@{#34094}

This is not currently implemented in the simulator, just the assembler and
disassembler.

BUG=v8:4614
LOG=y

Review URL: https://codereview.chromium.org/1699173003

Cr-Commit-Position: refs/heads/master@{#34093}

This patch adds the newly added support for contexts in V8 Tracing, as well
as use it to mark all the entry points for a V8 Isolate.

BUG=v8:4565
LOG=N

Review URL: https://codereview.chromium.org/1686233002

Cr-Commit-Position: refs/heads/master@{#34092}

Revert of [fullcodegen] Remove the hacky %_FastOneByteArrayJoin intrinsic. (patchset #1 id:1 of https://codereview.chromium.org/1708523002/ )

Reason for revert:
[Sheriff] Speculative revert for adding arm flakes:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm%20-%20sim/builds/5756
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm%20-%20sim%20-%20novfp3/builds/3375/

And some more...

Original issue's description:
> [fullcodegen] Remove the hacky %_FastOneByteArrayJoin intrinsic.
>
> This intrinsic was only supported in fullcodegen, and is actually no
> longer relevant for SunSpider peak performance it seems, so let's get
> rid of it and maybe just implement Array.prototype.join with a fast
> path at some point instead.
>
> R=mstarzinger@chromium.org
>
> Committed: https://crrev.com/ccf12b4bede3f1ce3ce14fb33bcc4041525a40af
> Cr-Commit-Position: refs/heads/master@{#34084}

TBR=mstarzinger@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1709693002

Cr-Commit-Position: refs/heads/master@{#34091}

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1710453002

Cr-Commit-Position: refs/heads/master@{#34090}

Adds kSimd128 to MachineRepresentation.
Adds a Simd128Register concept that's platform independent.
Adds UntaggedSimd128 to types.h.

LOG=N
BUG=v8:4124

Review URL: https://codereview.chromium.org/1693963004

Cr-Commit-Position: refs/heads/master@{#34089}

BUG=

Review URL: https://codereview.chromium.org/1703083002

Cr-Commit-Position: refs/heads/master@{#34088}

BUG=

Review URL: https://codereview.chromium.org/1706833002

Cr-Commit-Position: refs/heads/master@{#34087}

I replaced the hidden string with hidden_properties_symbol, so we don't
need the extra hash-check anymore. This is slightly faster anyway.

BUG=

Review URL: https://codereview.chromium.org/1707653003

Cr-Commit-Position: refs/heads/master@{#34086}

Port 0d595bb0

Original commit message:
    It's fine to only have the runtime call here, as it's only used in the
    debug mirror.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1707683002

Cr-Commit-Position: refs/heads/master@{#34085}

This intrinsic was only supported in fullcodegen, and is actually no
longer relevant for SunSpider peak performance it seems, so let's get
rid of it and maybe just implement Array.prototype.join with a fast
path at some point instead.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/1708523002

Cr-Commit-Position: refs/heads/master@{#34084}

This CL introduces two new bytecodes TailCall and TailCallWide.

BUG=v8:4698,v8:4687
LOG=N

Review URL: https://codereview.chromium.org/1698273003

Cr-Commit-Position: refs/heads/master@{#34083}

Revert of More simplification and unification of frame handling (patchset #5 id:80001 of https://codereview.chromium.org/1702593002/ )

Reason for revert:
[Sheriff] Breaks nosnap debug:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/5329

Original issue's description:
> More simplification and unification of frame handling
>
> Frame slots indexes numbers are used more consistently for
> computation in both TurboFan and Crankshaft. Specifically,
> Crankshaft now uses frame slot indexes in LChunk, removing
> the need for some special-case maths when building the
> deoptimization translation table.
>
> LOG=N
> R=mstarzinger@chromium.org
>
> Committed: https://crrev.com/81423b84dbb2eaf7e1a57b0f6029fc8e643b4755
> Cr-Commit-Position: refs/heads/master@{#34078}

TBR=mstarzinger@chromium.org,jarin@chromium.org,danno@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1708583002

Cr-Commit-Position: refs/heads/master@{#34082}

This removes the CompilationInfo field from the BytecodeGraphBuilder
class. The intention is to reduce the risk of using uninitialized or
unavailable values from the CompilationInfo (e.g. values that are only
available after parsing).

R=rmcilroy@chromium.org

Review URL: https://codereview.chromium.org/1704913002

Cr-Commit-Position: refs/heads/master@{#34081}

There's no need to have inline platform code for this intrinsic, which
is only used when generating a descriptive string for an error, the
runtime call is just fine here.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1706743002

Cr-Commit-Position: refs/heads/master@{#34080}

BUG=chromium:535160
LOG=n
TBR=tandrii@chromium.org, kjellander@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1706783002

Cr-Commit-Position: refs/heads/master@{#34079}

Frame slots indexes numbers are used more consistently for
computation in both TurboFan and Crankshaft. Specifically,
Crankshaft now uses frame slot indexes in LChunk, removing
the need for some special-case maths when building the
deoptimization translation table.

LOG=N
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/1702593002

Cr-Commit-Position: refs/heads/master@{#34078}

It's dead^Wa runtime call Jim!

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1702313002

Cr-Commit-Position: refs/heads/master@{#34077}

R=machenbach@chromium.org
TBR=danno@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1706753002

Cr-Commit-Position: refs/heads/master@{#34076}

BUG=chromium:535160
LOG=n
TBR=tandrii@chromium.org, kjellander@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1703853002

Cr-Commit-Position: refs/heads/master@{#34075}

R=machenbach@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1704963002

Cr-Commit-Position: refs/heads/master@{#34074}