First step towards making arguments and rest parameters optimizable by
splitting the allocations for the actual object and the elements. The
object allocations can already be escape analyzed this way, the elements
would need special support in the deoptimizer and the escape analysis,
but that can be done as a second separate step.

R=jarin@chromium.org
BUG=v8:5726

Review-Url: https://codereview.chromium.org/2557283002
Cr-Commit-Position: refs/heads/master@{#41573}

Yes. I thought I was being smart. And yes. It's just a one-liner.

TBR=cbruni@chromium.org
BUG=chromium:672009

Review-Url: https://codereview.chromium.org/2555213005
Cr-Commit-Position: refs/heads/master@{#41572}

Revert of Store OSR'd optimized code on the native context. (patchset #8 id:140001 of https://codereview.chromium.org/2549753002/ )

Reason for revert:
Speculative revert WebGL breakage reported in https://bugs.chromium.org/p/chromium/issues/detail?id=672367

Original issue's description:
> Store OSR'd optimized code on the native context.
>
> Since we OSR code rarely, it makes sense to store it and look for it on the native context rather than the SharedFunctionInfo. This makes the OptimizedCodeMap data structure more space efficient, as it doesn't have to store an ast ID for the OSR entry point.
>
> BUG=
>
> Committed: https://crrev.com/378b6b22fb7925ac5b672335a54599f5739e7758
> Cr-Commit-Position: refs/heads/master@{#41554}

TBR=mstarzinger@chromium.org, mvstanton@chromium.org, ulan@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2562623003
Cr-Commit-Position: refs/heads/master@{#41571}

BUG=v8:5725

Review-Url: https://codereview.chromium.org/2559933002
Cr-Commit-Position: refs/heads/master@{#41570}

-- Moves promiseHasHandlerSymbol to inobject property
-- Ports PromiseResolveClosure to TF
-- Fix a non spec async-await test which fails now because we do a map
check for native promise check (instead of IsPromise). Changing the
constructor (in the test) invalidates the map check.

This patch results in a 7.1% performance improvement in the bluebird
benchmark (over 5 runs).

BUG=v8:5343

Review-Url: https://codereview.chromium.org/2541283002
Cr-Commit-Position: refs/heads/master@{#41569}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/788dcd7..53448a6

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/415a532..11d3d44

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/7f925e3..caccf42

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

Review-Url: https://codereview.chromium.org/2555223003
Cr-Commit-Position: refs/heads/master@{#41568}

jasongin@ created this patch.
https://github.com/jasongin/nodejs/commit/dcc50445a364664586164f42f9250732bd372982
This patch adds the support to emit a trace event by using a comma-separated
list of categories, so that the trace event will be emitted if there is at least
one category is enabled in the categories list.

TBR=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2558193002
Cr-Commit-Position: refs/heads/master@{#41567}

Due to the isOwn check, functions inherited through prototype will not be
included in a preview.

BUG=645053

Review-Url: https://codereview.chromium.org/2554623003
Cr-Commit-Position: refs/heads/master@{#41566}

Getter properties are not currently included in the protocol's
Runtime.ObjectPreview. DevTools currently shows getter properties
when evaluating arrays in the console, and this CL brings them into
the preview generated for RemoteObjects.

Corresponding DevTools CL: https://codereview.chromium.org/2521513006/

BUG=666882

Review-Url: https://codereview.chromium.org/2508423002
Cr-Commit-Position: refs/heads/master@{#41565}

Previously we created 3 FixedArrays and then filled them up with
values. This meant that during the creation of the second and third
FixedArray, there were one and two FixedArrays respectively, without
any values in it which broke the FixedArrayVerify.

This patch fills each FixedArray with the correct values before
creating new ones.

BUG=chromium:672051

Review-Url: https://codereview.chromium.org/2554323003
Cr-Commit-Position: refs/heads/master@{#41564}

We're still collecting use counter data for this situation.

BUG=v8:4973
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2510873005
Cr-Commit-Position: refs/heads/master@{#41563}

Port 378b6b22

Original Commit Message:

    Since we OSR code rarely, it makes sense to store it and look for
    it on the native context rather than the SharedFunctionInfo.
    This makes the OptimizedCodeMap data structure more space efficient,
    as it doesn't have to store an ast ID for the OSR entry point.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2557113002
Cr-Commit-Position: refs/heads/master@{#41562}

BUG=

Review-Url: https://codereview.chromium.org/2560893002
Cr-Commit-Position: refs/heads/master@{#41561}

When an octal escape sequence is in a string in strict mode:
- Octal literals are not allowed in strict mode.
+ Octal escape sequences are not allowed in strict mode.

When an octal escape sequence is in a template string:
- Octal literals are not allowed in template strings.
+ Octal escape sequences are not allowed in template strings.

BUG=v8:4973
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2551633002
Cr-Commit-Position: refs/heads/master@{#41560}

This patch introduces:

1. ICStats class to store ic statistics items produced by V8,
2. A disabled by default tracing category v8.ic_stats,
3. An trace event V8.ICStats that contains ic statistics items in args,

We store ic statistics items in an array until the array is full to reduce
the number of trace events.

TBR=jkummerow@chromium.org,ishell@chromium.org

Review-Url: https://codereview.chromium.org/2503183002
Cr-Commit-Position: refs/heads/master@{#41559}

marking needs finalization.

TBR=mlippautz@chromium.org
BUG=chromium:671994,chromium:670675

Review-Url: https://codereview.chromium.org/2560813002
Cr-Commit-Position: refs/heads/master@{#41558}

The asm.js spec requires exports to be identifiers,
this was DCHECKED in the asm-wasm-builder, but not the typer.

BUG=672046
R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2552913004
Cr-Commit-Position: refs/heads/master@{#41557}

When v8 fails an access check, it invokes a helper to try to see if it
can service the request via an access check interceptor. Invoking the
access check interceptor can throw an exception (e.g. a SecurityError).

Unfortunately, the failed access check property helpers and the
interceptor helpers don't agree on how to propagate the exception: if
the interceptor helper detects a scheduled exception, it promotes the
exception to a pending exception and returns to the failed access check
property helper.

The failed access check property helper also has an early return in
case of a scheduled exception. However, this doesn't work, as the
previously thrown exception is no longer scheduled, as it's been
promoted to a pending exception. Thus, the failed access check property
helper always end up calling the failed access check callback as well.
Since Blink's implementation of the failed access check callback also
throws an exception, this conflicts with the previously-thrown,
already-pending exception.

With this patch, the failed access check property helpers check for a
pending exception rather than a scheduled exception after invoking the
interceptor, so the exception can be propagated correctly.

BUG=v8:5715
R=yangguo@chromium.org,jochen@chromium.org

Review-Url: https://codereview.chromium.org/2550423002
Cr-Commit-Position: refs/heads/master@{#41556}

Introduces:
- a new AST node representing the GetIterator() algorithm in the specification, to be used by ForOfStatement, YieldExpression (in the case of delegating yield*), and the future `for-await-of` loop proposed in http://tc39.github.io/proposal-async-iteration/#sec-async-iterator-value-unwrap-functions.
- a new opcode (JumpIfJSReceiver), which is useful for `if Type(object) is not Object` checks which are common throughout the specification. This node is easily eliminated by TurboFan.

The AST node is desugared specially in bytecode, rather than manually when building the AST. The benefit of this is that desugaring in the BytecodeGenerator is much simpler and easier to understand than desugaring the AST.

This also reduces parse time very slightly, and allows us to use LoadIC rather than KeyedLoadIC, which seems to have  better baseline performance. This results in a ~20% improvement in test/js-perf-test/Iterators micro-benchmarks, which I believe owes to the use of the slightly faster LoadIC as opposed to the KeyedLoadIC in the baseline case. Both produce identical optimized code via TurboFan when the type check can be eliminated, and the load can be replaced with a constant value.

BUG=v8:4280
R=bmeurer@chromium.org, rmcilroy@chromium.org, adamk@chromium.org, neis@chromium.org, jarin@chromium.org
TBR=rossberg@chromium.org

Review-Url: https://codereview.chromium.org/2557593004
Cr-Commit-Position: refs/heads/master@{#41555}

Since we OSR code rarely, it makes sense to store it and look for it on the native context rather than the SharedFunctionInfo. This makes the OptimizedCodeMap data structure more space efficient, as it doesn't have to store an ast ID for the OSR entry point.

BUG=

Review-Url: https://codereview.chromium.org/2549753002
Cr-Commit-Position: refs/heads/master@{#41554}

BUG=chromium:468240,chromium:668060

Review-Url: https://codereview.chromium.org/2551973005
Cr-Commit-Position: refs/heads/master@{#41553}

There were two bugs, one partly hiding the other one:
1) We generate the ToNumber conversion for each WASM_TO_JS wrapper,
   even if the expected return type is void.
2) The return node in the WASM_TO_JS wrapper did not use the effect of
   the ToNumber conversion.

This CL fixes both, and adds test cases to check that we do throw an
error trying to convert (e.g.) Symbol to a number, but only if the
return type is not void.
Additional test check that a user-provided valueOf method is actually
called the correct number of times.

R=titzer@chromium.org, bradnelson@chromium.org
BUG=v8:4203

Review-Url: https://codereview.chromium.org/2552123004
Cr-Commit-Position: refs/heads/master@{#41552}

R=mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/2561563002
Cr-Commit-Position: refs/heads/master@{#41551}

Both @@match and @@split internally use dynamically growing fixed
arrays. Shrink to fit when wrapping these in a JSArray to avoid
excessive memory usage.

BUG=chromium:670205,chromium:670708

Review-Url: https://codereview.chromium.org/2556773002
Cr-Commit-Position: refs/heads/master@{#41550}

R=jgruber@chromium.org, kozyatinskiy@chromium.org
BUG=v8:5510

Review-Url: https://codereview.chromium.org/2530093002
Cr-Commit-Position: refs/heads/master@{#41549}

BUG=

Review-Url: https://codereview.chromium.org/2560663002
Cr-Commit-Position: refs/heads/master@{#41548}

The flag must be used only by CodeStubAssemblerGraphsCorrectness cctest for now
and once all the verification issues are fixed the flag will be enabled in debug
mode by default.

This CL also relaxes some checks for code stub graphs and fixes some issues in the stubs.

BUG=

Review-Url: https://codereview.chromium.org/2558653002
Cr-Commit-Position: refs/heads/master@{#41547}

This allows to detect a static property also named 'name', and also makes sure 'name' is added last, to be standards-compliant.

BUG=v8:4199

Review-Url: https://codereview.chromium.org/2423053002
Cr-Commit-Position: refs/heads/master@{#41546}

BUG=chromium:665398

Review-Url: https://codereview.chromium.org/2556833003
Cr-Commit-Position: refs/heads/master@{#41545}

Removing elements from stub cache by Major key only does not always work.

BUG=

Review-Url: https://codereview.chromium.org/2551353003
Cr-Commit-Position: refs/heads/master@{#41544}

This patch fixes jump_tables6 test for mips32r6 and mips64r6.
This is regression from CL:
https://crrev.com/d735f3ab12061f0a588b3f0538f9229cf747f818

BUG=

Review-Url: https://codereview.chromium.org/2547033002
Cr-Commit-Position: refs/heads/master@{#41543}

This just calls into a runtime function for implementation currently.

Intermediate step in speeding up constructor calls containing a spread.

The NewWithSpread bytecode will probably end up having different arguments with future CLs - the constructor and the new.target should have their own regs. For now we are calling into the runtime function, so we need the regs together.

BUG=v8:5659

Review-Url: https://codereview.chromium.org/2541113004
Cr-Commit-Position: refs/heads/master@{#41542}

BUG=chromium:671574

Review-Url: https://codereview.chromium.org/2560743002
Cr-Commit-Position: refs/heads/master@{#41541}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2b2a961..788dcd7

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/buildtools/+log/64e38f0..55ad626

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/287f4bd..415a532

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

Review-Url: https://codereview.chromium.org/2556003002
Cr-Commit-Position: refs/heads/master@{#41540}

Since addi sets cr0, it should be passed to Assert method (default
is cr7)

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

Review-Url: https://codereview.chromium.org/2560473003
Cr-Commit-Position: refs/heads/master@{#41539}

BUG=v8:5343

Review-Url: https://codereview.chromium.org/2556483002
Cr-Commit-Position: refs/heads/master@{#41538}

BUG=v8:5343

Review-Url: https://codereview.chromium.org/2558493003
Cr-Commit-Position: refs/heads/master@{#41537}

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

Review-Url: https://codereview.chromium.org/2559433003
Cr-Commit-Position: refs/heads/master@{#41536}

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711

Review-Url: https://codereview.chromium.org/2551943003
Cr-Commit-Position: refs/heads/master@{#41535}

This reverts commit 4c7cccf9.

BUG=v8:5343

Review-Url: https://codereview.chromium.org/2554943002
Cr-Commit-Position: refs/heads/master@{#41534}