This ports the platform-specific SubStringStub to TurboFan.

It also contains a minor bug-fix for the case when the requested substring
length equals the subject string length, but the start index is not equal to 0.
The old stub implementation returned the subject string, while the new
implementation calls into runtime, which finally results in a thrown exception.

BUG=v8:5415

Committed: https://crrev.com/49be31921536716706a6790fbbf9c346b975af16
Review-Url: https://codereview.chromium.org/2355793003
Cr-Original-Commit-Position: refs/heads/master@{#39653}
Cr-Commit-Position: refs/heads/master@{#39851}

Change include statement, otherwise embedders have problems compiling.

BUG=

Review-Url: https://codereview.chromium.org/2378773004
Cr-Commit-Position: refs/heads/master@{#39850}

When lowering a JSLoadNamed with an immutable own property of a
known constant JSObject, we can just constant fold the load during
native context specialization, similar to what Crankshaft does in
HOptimizedGraphBuilder::BuildLoadNamedField. This way we can also
constant-fold stuff like Math.LN2 and friends.

R=jarin@chromium.org
BUG=v8:5267

Review-Url: https://codereview.chromium.org/2376033002
Cr-Commit-Position: refs/heads/master@{#39849}

BUG=chromium:651070

Review-Url: https://codereview.chromium.org/2371403003
Cr-Commit-Position: refs/heads/master@{#39848}

Rolling v8/base/trace_event/common to 08b7b94e88aecc99d435af7f29fda86bd695c4bd

Rolling v8/build to d3f34f8dfaecc23202a6ef66957e83462d6c826d

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

Review-Url: https://codereview.chromium.org/2380463004
Cr-Commit-Position: refs/heads/master@{#39847}

BUG=chromium:635948
R=dgozman@chromium.org,alph@chromium.org

Review-Url: https://codereview.chromium.org/2354263003
Cr-Commit-Position: refs/heads/master@{#39846}

The module size is encoded as a HeapNumber, and needs to be
explicitly cloned.

BUG=chromium:647649

Review-Url: https://codereview.chromium.org/2347333002
Cr-Commit-Position: refs/heads/master@{#39845}

BUG=chromium:651211,chromium:650965
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2376143002
Cr-Commit-Position: refs/heads/master@{#39844}

BUG=chromium:650729
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2373753003
Cr-Commit-Position: refs/heads/master@{#39843}

R=neis@chromium.org

Review-Url: https://codereview.chromium.org/2372373002
Cr-Commit-Position: refs/heads/master@{#39842}

Ports https://codereview.chromium.org/2375753002/

TBR=dpranke@chromium.org, jochen@chromium.org

Review-Url: https://codereview.chromium.org/2379743002
Cr-Commit-Position: refs/heads/master@{#39841}

 - Store instruction with an offset bigger than GrowMemory offset should handle out of bounds correctly
 - Refactor to separate runnning from compile so arguments can be passed in to module builder tests.

BUG=chromium:644670

R=ahaas@chromium.org, titzer@chromium.org

Review-Url: https://codereview.chromium.org/2373613004
Cr-Commit-Position: refs/heads/master@{#39840}

BUG=
LOG=no

Review-Url: https://codereview.chromium.org/2379623002
Cr-Commit-Position: refs/heads/master@{#39839}

Reland "[heap] New heuristics for starting of incremental marking. (patchset #9 id:160001 of https://codereview.chromium.org/2364923002/ )"

This reverts commit a5440d11.

BUG=chromium:616434
TBR=hpayer@chromium.org
LOG=NO

Review-Url: https://codereview.chromium.org/2379663002
Cr-Commit-Position: refs/heads/master@{#39838}

BUG=

Review-Url: https://codereview.chromium.org/2375933003
Cr-Commit-Position: refs/heads/master@{#39837}

Several of the asm.js tests were disabled and wrong (mismatched number of args
on the stdlib functions).

Fixing issue around negation and float + doubles.

Renaming function for IsNegate to IsInvert (to reflect what it actually does).

Added tests for negate and invert.

BUG= https://bugs.chromium.org/p/v8/issues/detail?id=4203
R=aseemgarg@chromium.org,jpp@chromium.org

Review-Url: https://codereview.chromium.org/2377903002
Cr-Commit-Position: refs/heads/master@{#39836}

BUG=

Review-Url: https://codereview.chromium.org/2379613002
Cr-Commit-Position: refs/heads/master@{#39835}

BUG=

Committed: https://crrev.com/ff8cfa9e5e8495165291ddf6e01dba3f8cb5a177
Review-Url: https://codereview.chromium.org/2374963002
Cr-Original-Commit-Position: refs/heads/master@{#39809}
Cr-Commit-Position: refs/heads/master@{#39834}

Revert of [heap] New heuristics for starting of incremental marking. (patchset #9 id:160001 of https://codereview.chromium.org/2364923002/ )

Reason for revert:
OOMs in nosnap debug:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/9572

Original issue's description:
> [heap] New heuristics for starting of incremental marking.
>
> The motivation for this patch is to move more marking work to tasks.
> This is done by postponing the start of incremental marking until
> a marking task is running.
>
> This patch introduces a soft and a hard limits for incremental marking.
> When the soft limit is reached, the marking task is scheduled.
> If the hard limit is reached before the task is running, then
> incremental marking is started without waiting for the task.
>
> BUG=chromium:616434
> LOG=NO
>
> Committed: https://crrev.com/55683ddd2a32e0dfb8df66271fbf53e3618cce9d
> Cr-Commit-Position: refs/heads/master@{#39831}

TBR=hpayer@chromium.org,ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:616434

Review-Url: https://codereview.chromium.org/2375983002
Cr-Commit-Position: refs/heads/master@{#39833}

Adds a fast-path test and branch for the turbofan graph generated by
BytecodeGraphBuilder for dynamic local lookups.

BUG=v8:5263

Review-Url: https://codereview.chromium.org/2378653003
Cr-Commit-Position: refs/heads/master@{#39832}

The motivation for this patch is to move more marking work to tasks.
This is done by postponing the start of incremental marking until
a marking task is running.

This patch introduces a soft and a hard limits for incremental marking.
When the soft limit is reached, the marking task is scheduled.
If the hard limit is reached before the task is running, then
incremental marking is started without waiting for the task.

BUG=chromium:616434
LOG=NO

Review-Url: https://codereview.chromium.org/2364923002
Cr-Commit-Position: refs/heads/master@{#39831}

Cleanup.

BUG=

Review-Url: https://codereview.chromium.org/2379573002
Cr-Commit-Position: refs/heads/master@{#39830}

This patch moves the following parsing method to ParserBase:

- ParseClassDeclaration
- ParseClassLiteral
- ParseNativeDeclaration

R=adamk@chromium.org, marja@chromium.org
BUG=
LOG=N

Committed: https://crrev.com/7818355363b7a66ff7709e33c72bfdef5eb21450
Review-Url: https://codereview.chromium.org/2368083002
Cr-Original-Commit-Position: refs/heads/master@{#39814}
Cr-Commit-Position: refs/heads/master@{#39829}

Previously we'd have a scope in the main zone, and another in the temp zone. Then we carefully copied back data to the main zone. This CL changes it so that the scope is just fixed up to only contain data from the main zone. That avoids additional copies and additional allocations; while not increasing the care that needs to be taken. This will also make it easier to abort preparsing while parsing using a temp zone.

BUG=

Committed: https://crrev.com/f41e7ebd62b32e861b6aa14ad8bfce3018d03c3c
Review-Url: https://codereview.chromium.org/2368313002
Cr-Original-Commit-Position: refs/heads/master@{#39800}
Cr-Commit-Position: refs/heads/master@{#39828}

This patch simplifies code for speeding up marking and
removes write barrier counter.

The step size is now computed based in two parts:
- bytes to mark in order to keep up with allocation,
- bytes to mark in order to make progress.

BUG=chromium:616434, chromium:646139, chromium:644819
LOG=NO

Review-Url: https://codereview.chromium.org/2359903002
Cr-Commit-Position: refs/heads/master@{#39827}

This patch replaces cumulative counters with the counters for the current GC cycle.

It also replaces the ring buffer of record incremental marking speeds with a single variable.

Review-Url: https://codereview.chromium.org/2361563004
Cr-Commit-Position: refs/heads/master@{#39826}

BUG=chromium:581412
R=hpayer@chromium.org

Review-Url: https://codereview.chromium.org/2374023002
Cr-Commit-Position: refs/heads/master@{#39825}

This cl introduces reporter to the embedder heap tracer. Heap tracer uses
reporter to report reachable objects from embedder heap. This refactoring is a
step towards being able to take heap snapshots with wrapper tracing.

LOG=no
BUG=468240

Review-Url: https://codereview.chromium.org/2371733002
Cr-Commit-Position: refs/heads/master@{#39824}

BUG=chromium:650973

Review-Url: https://codereview.chromium.org/2374003002
Cr-Commit-Position: refs/heads/master@{#39823}

As of https://codereview.chromium.org/2348493003 there are no users of
this intrinsic left in the code, and we don't want to have any new users
of it. The runtime function remains as it serves as a fallback for the
optimized code (Crankshaft code actually).

BUG=v8:5049
R=mstarzinger@chromium.org

Review-Url: https://codereview.chromium.org/2378693002
Cr-Commit-Position: refs/heads/master@{#39822}

Revert of Don't use different function scopes when parsing with temp zones (patchset #11 id:200001 of https://codereview.chromium.org/2368313002/ )

Reason for revert:
Revert due to asm.js slowdown

Original issue's description:
> Don't use different function scopes when parsing with temp zones
>
> Previously we'd have a scope in the main zone, and another in the temp zone. Then we carefully copied back data to the main zone. This CL changes it so that the scope is just fixed up to only contain data from the main zone. That avoids additional copies and additional allocations; while not increasing the care that needs to be taken. This will also make it easier to abort preparsing while parsing using a temp zone.
>
> BUG=
>
> Committed: https://crrev.com/f41e7ebd62b32e861b6aa14ad8bfce3018d03c3c
> Cr-Commit-Position: refs/heads/master@{#39800}

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

Review-Url: https://codereview.chromium.org/2379533003
Cr-Commit-Position: refs/heads/master@{#39821}

Revert of [parser] Refactor of ParseClass* and ParseNativeDeclaration (patchset #7 id:120001 of https://codereview.chromium.org/2368083002/ )

Reason for revert:
Blocks reverting https://codereview.chromium.org/2368313002

Original issue's description:
> [parser] Refactor of ParseClass* and ParseNativeDeclaration
>
> This patch moves the following parsing method to ParserBase:
>
> - ParseClassDeclaration
> - ParseClassLiteral
> - ParseNativeDeclaration
>
> R=adamk@chromium.org, marja@chromium.org
> BUG=
> LOG=N
>
> Committed: https://crrev.com/7818355363b7a66ff7709e33c72bfdef5eb21450
> Cr-Commit-Position: refs/heads/master@{#39814}

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

Review-Url: https://codereview.chromium.org/2380663002
Cr-Commit-Position: refs/heads/master@{#39820}

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2376963002
Cr-Commit-Position: refs/heads/master@{#39819}

Add documentation for Has(), HasOwnProperty(), and HasRealNamedProperty()
that points out their differences and links to the other functions.

BUG=v8:5433

Review-Url: https://codereview.chromium.org/2365403003
Cr-Commit-Position: refs/heads/master@{#39818}

TurboFan lowering (see [0]) of ConsString creation cannot ensure that
the first part of the cons string is non-empty without introducing a phi
and negatively impacting performance.

This modifies ConsStringIterator to allow empty first parts of
ConsStrings.

BUG=v8:5440

Review-Url: https://codereview.chromium.org/2377983002
Cr-Commit-Position: refs/heads/master@{#39817}

BUG=
NOTRY=true

Review-Url: https://codereview.chromium.org/2380643002
Cr-Commit-Position: refs/heads/master@{#39816}

Revert of Preparse top-level functions in discardable zones (patchset #2 id:20001 of https://codereview.chromium.org/2374963002/ )

Reason for revert:
Needed to revert https://codereview.chromium.org/2368313002 which slows down asm.js code

Original issue's description:
> Preparse top-level functions in discardable zones
>
> BUG=
>
> Committed: https://crrev.com/ff8cfa9e5e8495165291ddf6e01dba3f8cb5a177
> Cr-Commit-Position: refs/heads/master@{#39809}

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

Review-Url: https://codereview.chromium.org/2375013002
Cr-Commit-Position: refs/heads/master@{#39815}

This patch moves the following parsing method to ParserBase:

- ParseClassDeclaration
- ParseClassLiteral
- ParseNativeDeclaration

R=adamk@chromium.org, marja@chromium.org
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2368083002
Cr-Commit-Position: refs/heads/master@{#39814}

When the inline lookup on a fast-property receiver doesn't find anything,
try a stub cache lookup before going into the runtime. This is much
faster for properties loaded from the receiver's prototype chain.

BUG=chromium:650236

Review-Url: https://codereview.chromium.org/2373683002
Cr-Commit-Position: refs/heads/master@{#39813}

Revert of [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged. (patchset #2 id:20001 of https://codereview.chromium.org/2380543002/ )

Reason for revert:
Tanks ai-astar in Kraken pretty badly (some deopt loop).

Original issue's description:
> [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.
>
> Add a CanonicalizationMode to CodeStubAssembler::ChangeFloat64ToTagged,
> so clients can request Smi canonicalization when desired, but otherwise
> get Crankshaft/Fullcodegen compatible behavior of just boxing the double
> into a HeapNumber.
>
> R=verwaest@chromium.org
> BUG=v8:5268
>
> Committed: https://crrev.com/06eef6e6d8199df8317df8469d767092472f3fe0
> Cr-Commit-Position: refs/heads/master@{#39804}

TBR=verwaest@chromium.org,jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5268

Review-Url: https://codereview.chromium.org/2373253003
Cr-Commit-Position: refs/heads/master@{#39812}