Since Ignition dispatch counters have been made accessible from
JavaScript via getIgnitionDispatchCounters() in [1], writing
them to a file at the end of the execution does not seem the best
default anymore.

Following this commit, a file is written only if d8 is invoked
with --trace-ignition-dispatches-output-file.

[1] https://crrev.com/905becd13b8696e126255decf130fdb9e1d9aa30

LOG=N
BUG=v8:4899

Review-Url: https://codereview.chromium.org/1943923002
Cr-Commit-Position: refs/heads/master@{#36015}

This allows for top-level eval code to be parsed properly before doing
optimization. It uses the same kind of re-parsing we already perform
when compiling code for debugging.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1884143003
Cr-Commit-Position: refs/heads/master@{#36014}

When storing an immediate integer or floating point zero, use the zero register
as the source value. This avoids the need to sometimes allocate a new register.

BUG=

Review-Url: https://codereview.chromium.org/1945783002
Cr-Commit-Position: refs/heads/master@{#36013}

Sampling heap profiler keeps weak references. These should be marked
independent so that the weak callback can be dispatched on new space
collections.

BUG=v8:4959
LOG=N
R=ulan@chromium.org

Review-Url: https://codereview.chromium.org/1945193002
Cr-Commit-Position: refs/heads/master@{#36012}

BUG=chromium:598319
LOG=N

Review-Url: https://codereview.chromium.org/1948573003
Cr-Commit-Position: refs/heads/master@{#36011}

The language mode is no longer constant accross a compilation unit. For
example the extends clause of a class literal can be in strict mode even
though the surrounding function is in sloppy mode. This makes any global
language mode predicate that reasons over an entire function inherently
dangerous. Instead one should use the appropriate predicate on scopes or
literals directly.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1949013002
Cr-Commit-Position: refs/heads/master@{#36010}

Before this patch, we would emit a cmp or test with a memory operand only if both of the operands in the IR were loads. Now if either of them is a load and the other one is an immediate, we can use a memory operand if the load representation machine size is wide enough to represent the latter.

Review-Url: https://codereview.chromium.org/1948453002
Cr-Commit-Position: refs/heads/master@{#36009}

R=ahaas@chromium.org,bradnelson@chromium.org
BUG=chromium:608630
LOG=Y

Review-Url: https://codereview.chromium.org/1943313002
Cr-Commit-Position: refs/heads/master@{#36008}

The predicate in question was a workaround for when the compilation
pipeline still kept bytecode and baseline code on the same shared
function info. It is not longer needed. In the long run we want a
predicate which can determine the exact tier for each function.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/1940913002
Cr-Commit-Position: refs/heads/master@{#36007}

The inline allocation sequence in the optimizing compilers cannot deal
well with funky types like JSRegExp, which have some magic fields in
addition to the inobject properties. In Crankshaft we already use the
FastNewObjectStub for %_NewObject in general, so fix TurboFan to the same.
Hopefully one day we can kill %_NewObject completely.

R=jarin@chromium.org
BUG=chromium:609029
LOG=n

Review-Url: https://codereview.chromium.org/1943403004
Cr-Commit-Position: refs/heads/master@{#36006}

Review-Url: https://codereview.chromium.org/1946883003
Cr-Commit-Position: refs/heads/master@{#36005}

Port 81cb8411

R=binji@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:4614
LOG=N

Review-Url: https://codereview.chromium.org/1951643002
Cr-Commit-Position: refs/heads/master@{#36004}

Port d2efbf25

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=chromium:608675
LOG=N

Review-Url: https://codereview.chromium.org/1952503002
Cr-Commit-Position: refs/heads/master@{#36003}

Rolling v8/build to bbe88f49be848cde9fcf4e1f470506cd560ec5f6

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

Review-Url: https://codereview.chromium.org/1944243002
Cr-Commit-Position: refs/heads/master@{#36002}

Compiler backends get their language mode from the current
function, but should instead be deriving it from the current scope.
This allows proper handling of the always-strictness of class declarations
and expressions, and in particular the treatment of 'eval' calls in an
extends clause as a strict eval.

Also fix the parser's RecordEvalCall logic to only reach out to the
DeclarationScope in sloppy mode, which fixes the strange case of a
sloppy function thinking it contains a sloppy eval when in fact
it contains only a strict eval.

BUG=v8:4970
LOG=n

Review-Url: https://codereview.chromium.org/1931003003
Cr-Commit-Position: refs/heads/master@{#36001}

BUG=chromium:608675
LOG=N

Review-Url: https://codereview.chromium.org/1948433002
Cr-Commit-Position: refs/heads/master@{#36000}

TEST=cctest/test-api/Regress470113 --ignition
R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, bjaideep@ca.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/1946733002
Cr-Commit-Position: refs/heads/master@{#35999}

https://codereview.chromium.org/1938213002 added xchg_b and xchg_w, but didn't
add it to the disassembler, and there were no tests that caught it.

BUG=v8:4614
TBR=bmeurer@chromium.org
LOG=n

Review-Url: https://codereview.chromium.org/1947673002
Cr-Commit-Position: refs/heads/master@{#35998}

Typing icount at the sim debug prompt will print the current icount.
si <mnemonic> steps through instructions until an instruction with that
mnemonic is seen.
E.g. si brc will stop at the next brc instruction before executing it.

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

Review-Url: https://codereview.chromium.org/1944913002
Cr-Commit-Position: refs/heads/master@{#35997}

BUG=chromium:598319
LOG=N

Review-Url: https://codereview.chromium.org/1943733003
Cr-Commit-Position: refs/heads/master@{#35996}

R=rmcilroy@chromium.org
BUG=v8:4899
LOG=n

Review URL: https://codereview.chromium.org/1938673002 .

Cr-Commit-Position: refs/heads/master@{#35995}

Port fa570e55

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/1950443002
Cr-Commit-Position: refs/heads/master@{#35994}

BUG=v8:4614
R=bmeurer@chromium.org,jarin@chromium.org
LOG=n

Review-Url: https://codereview.chromium.org/1938213002
Cr-Commit-Position: refs/heads/master@{#35993}

R=ahaas@chromium.org,bradnelson@chromium.org
BUG=chromium:592352
LOG=Y

Review-Url: https://codereview.chromium.org/1943373002
Cr-Commit-Position: refs/heads/master@{#35992}

The Great Keys Migration:
This is part of a bigger effort to centralize optimizations for key collections
in a central place. This necessary to avoid the penalty that would be introduced
by fixing shadowed property iteration.

BUG=v8:4758, v8:705
LOG=N

Review-Url: https://codereview.chromium.org/1938413002
Cr-Commit-Position: refs/heads/master@{#35991}

Disable ASM_LOCATION inline debug messages in release builds. This makes code
size measurements more representative when using the simulator.

BUG=

Review-Url: https://codereview.chromium.org/1919013005
Cr-Commit-Position: refs/heads/master@{#35990}

Omitting the initializer will give zero-initialization which is equivalent
to kNoWriteBarrier.

Review-Url: https://codereview.chromium.org/1942293002
Cr-Commit-Position: refs/heads/master@{#35989}

native_handle_ on AIX64 is of type int, and therefore fails
on an operation with a pointer type. Use
kSemaphoreAlignmentMask as sizeof(int) on AIX and
sizeof(pointer) otherwise.

R=jochen@chromium.org, mbrandy@us.ibm.com

BUG=v8:4767
LOG=N

Review-Url: https://codereview.chromium.org/1936003002
Cr-Commit-Position: refs/heads/master@{#35988}

This moves all implementation internals of the Pipeline class into the
corresponding cc-file. Only the public API remains in the header and is
made up of static functions only.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1948443002
Cr-Commit-Position: refs/heads/master@{#35987}

Reland of [heap] Fix clearing slots for map and size during LeftTrimFixedArray (patchset #1 id:1 of https://codereview.chromium.org/1947473002/ )

Reason for revert:
Unrelated to waterfall failures.

Original issue's description:
> Revert of [heap] Fix clearing slots for map and size during LeftTrimFixedArray (patchset #1 id:1 of https://codereview.chromium.org/1943263002/ )
>
> Reason for revert:
> GC-stress failures: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3305/steps/Mjsunit/logs/array-copywithin
>
> Original issue's description:
> > [heap] Fix clearing slots for map and size during LeftTrimFixedArray
> >
> > BUG=chromium:598319
> > LOG=N
> >
> > Committed: https://crrev.com/5aa1d9c3cfde4389fb5a34e98a5dccbca9dc9f12
> > Cr-Commit-Position: refs/heads/master@{#35970}
>
> TBR=ulan@chromium.org,mlippautz@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:598319
>
> Committed: https://crrev.com/a4129bb45a3bb8cc68bb2e07ee1e0a734f04ce4b
> Cr-Commit-Position: refs/heads/master@{#35979}

TBR=ulan@chromium.org,yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:598319

Review-Url: https://codereview.chromium.org/1947503002
Cr-Commit-Position: refs/heads/master@{#35986}

The problem is actually not related to try-catch, so here is a test
without try-catch.

BUG=chromium:607493
LOG=n

Review-Url: https://codereview.chromium.org/1943883002
Cr-Commit-Position: refs/heads/master@{#35985}

Reland of [turbofan] Restore basic write barrier elimination. (patchset #1 id:1 of https://codereview.chromium.org/1943743003/ )

Reason for revert:
Jakob found the actual issue with the CL and is going to land the fix after relanding the WB elimination.

Original issue's description:
> Revert of [turbofan] Restore basic write barrier elimination. (patchset #2 id:20001 of https://codereview.chromium.org/1938993002/ )
>
> Reason for revert:
> Breaks WBs that should be there ;)
>
> https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3305
>
> Will open repro bug asap.
>
> Original issue's description:
> > [turbofan] Restore basic write barrier elimination.
> >
> > Restore the basic write barrier elimination that we used to run as part
> > of the simplified lowering phase (in ChangeLowering actually) before, by
> > moving the write barrier computation to SimplifiedLowering where we can
> > still look at types and consider the heap/isolate, and just update the
> > WriteBarrierKind in the FieldAccess/ElementAccess that we later use when
> > lowering to a machine Load/Store.
> >
> > CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
> > R=mstarzinger@chromium.org
> > BUG=v8:4969,chromium:608636
> > LOG=n
> >
> > Committed: https://crrev.com/7dcb6ad379fbacbc8bdc8e11a6e50d680ffa3f62
> > Cr-Commit-Position: refs/heads/master@{#35969}
>
> 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
> BUG=v8:4969,chromium:608636
>
> Committed: https://crrev.com/a782e93c617e728cded5ad878de11137a67891b7
> Cr-Commit-Position: refs/heads/master@{#35983}

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
BUG=v8:4969,chromium:608636

Review-Url: https://codereview.chromium.org/1943323002
Cr-Commit-Position: refs/heads/master@{#35984}

Revert of [turbofan] Restore basic write barrier elimination. (patchset #2 id:20001 of https://codereview.chromium.org/1938993002/ )

Reason for revert:
Breaks WBs that should be there ;)

https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3305

Will open repro bug asap.

Original issue's description:
> [turbofan] Restore basic write barrier elimination.
>
> Restore the basic write barrier elimination that we used to run as part
> of the simplified lowering phase (in ChangeLowering actually) before, by
> moving the write barrier computation to SimplifiedLowering where we can
> still look at types and consider the heap/isolate, and just update the
> WriteBarrierKind in the FieldAccess/ElementAccess that we later use when
> lowering to a machine Load/Store.
>
> CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
> R=mstarzinger@chromium.org
> BUG=v8:4969,chromium:608636
> LOG=n
>
> Committed: https://crrev.com/7dcb6ad379fbacbc8bdc8e11a6e50d680ffa3f62
> Cr-Commit-Position: refs/heads/master@{#35969}

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
BUG=v8:4969,chromium:608636

Review-Url: https://codereview.chromium.org/1943743003
Cr-Commit-Position: refs/heads/master@{#35983}

BUG=chromium:607493
LOG=n

Review-Url: https://codereview.chromium.org/1949433002
Cr-Commit-Position: refs/heads/master@{#35982}

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1947463002
Cr-Commit-Position: refs/heads/master@{#35981}

Some uninitialized ICs used to be implemented as builtins. This is apparently
no longer the case.

R=bmeurer@chromium.org, mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/1940283002
Cr-Commit-Position: refs/heads/master@{#35980}

Revert of [heap] Fix clearing slots for map and size during LeftTrimFixedArray (patchset #1 id:1 of https://codereview.chromium.org/1943263002/ )

Reason for revert:
GC-stress failures: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3305/steps/Mjsunit/logs/array-copywithin

Original issue's description:
> [heap] Fix clearing slots for map and size during LeftTrimFixedArray
>
> BUG=chromium:598319
> LOG=N
>
> Committed: https://crrev.com/5aa1d9c3cfde4389fb5a34e98a5dccbca9dc9f12
> Cr-Commit-Position: refs/heads/master@{#35970}

TBR=ulan@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:598319

Review-Url: https://codereview.chromium.org/1947473002
Cr-Commit-Position: refs/heads/master@{#35979}

By now the Pipeline class can no longer be used to construct instances
from the outside. The constructor and all non-exposed helpers can be
made private.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1943243003
Cr-Commit-Position: refs/heads/master@{#35978}

v8::Object::{Set,Get,Delete}HiddenValue have long been deprecated.
Please use v8::Object::{Set,Has,Get}Private instead.

R=jochen@chromium.org
LOG=Y

Review-Url: https://codereview.chromium.org/1942233002
Cr-Commit-Position: refs/heads/master@{#35977}

Additionally I removed some stale comments.

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/1941323002
Cr-Commit-Position: refs/heads/master@{#35976}