Equality with null/undefined is equivalent to a check on the undetectable bit
on the map of the object. This would be more efficient than performing the entire
comparison operation.

This cl introduces:
1. A new bytecode called TestUndetectable that checks if the object is null/undefined.
2. Updates peeophole optimizer to emit TestUndetectable when a LdaNull/Undefined
precedes equality check.
4. TestUndetectable is transformed to ObjectIsUndetectable operator when building
turbofan graph.

BUG=v8:4280

Review-Url: https://codereview.chromium.org/2547043002
Cr-Commit-Position: refs/heads/master@{#41514}

Move a method that is not referenced in tools/presubmit.py.

BUG=v8:5603
NOTRY=true

Review-Url: https://codereview.chromium.org/2553623002
Cr-Commit-Position: refs/heads/master@{#41513}

Reason for revert:
Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/11861

See:
https://github.com/v8/v8/wiki/Blink-layout-tests

Original issue's description:
> Object
> -- New JSObject for promises: JSPromise
>
> Builtins
> -- PromiseThen TFJ
> -- PromiseCreateAndSet TFJ for internal use
> -- PerformPromiseThen TFJ for internal use
> -- PromiseInit for initial promise setup
> -- SpeciesConstructor for use in PromiseThen
> -- ThrowIfNotJSReceiver for use in SpeciesConstructor
> -- AppendPromiseCallback to update FixedArray with new callback
> -- InternalPerformPromiseThen
>
> Promises.js
> -- Cleanup unused symbols
> -- Remove PerformPromiseThen
> -- Remove PromiseThen
> -- Remove PromiseSet
> -- Remove PromiseAttachCallbacks
>
> Runtime
> -- PromiseSet to set promise inobject values
> -- Refactor functions to use FixedArrays for callbacks instead of
>    JSArray
> -- Runtime_PromiseStatus to return promise status
> -- Runtime_PromiseResult to return promise result
> -- Runtime_PromiseDeferred to return deferred attached to promise
> -- Runtime_PromiseRejectReactions to return reject reactions attached
>    to promise
>
> This CL results in a 13.07% improvement in the promises benchmark
> (over 5 runs).
>
> BUG=v8:5343
>
> Committed: https://crrev.com/30b564c76f490f8f6b311a74b25b26cf0a96be2d
> Cr-Commit-Position: refs/heads/master@{#41503}

TBR=bmeurer@chromium.org,jgruber@chromium.org,caitp@igalia.com,gsathya@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5343

Review-Url: https://codereview.chromium.org/2554013002
Cr-Commit-Position: refs/heads/master@{#41512}

BUG=

Review-Url: https://codereview.chromium.org/2558443002
Cr-Commit-Position: refs/heads/master@{#41511}

asm.js errata on section 5.4 allows fround of numeric literals
without '.'.

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

Review-Url: https://codereview.chromium.org/2552243002
Cr-Commit-Position: refs/heads/master@{#41510}

This allows us to forward declare Label and Variable classes without including the
code-assembler.h.

BUG=

Review-Url: https://codereview.chromium.org/2551163003
Cr-Commit-Position: refs/heads/master@{#41509}

Port for 3396bb29

TEST=
BUG=

Review-Url: https://codereview.chromium.org/2534413002
Cr-Commit-Position: refs/heads/master@{#41508}

Incooperate suggestion from adamk@ to only sent lexical variables to
I+TF that require explicit initialization, i.e. don't send named
function expressions to I+TF. This should recover most of the regression
now.

Also introduce a regression test for the original let issue.

BUG=chromium:670691,v8:5666
R=adamk@chromium.org,yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2556663002
Cr-Commit-Position: refs/heads/master@{#41507}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/0676437..2b2a961

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/buildtools/+log/102c163..64e38f0

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/627b0d9..287f4bd

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

Review-Url: https://codereview.chromium.org/2555663002
Cr-Commit-Position: refs/heads/master@{#41506}

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

Review-Url: https://codereview.chromium.org/2385393002
Cr-Commit-Position: refs/heads/master@{#41505}

Reland of [typedarrays] remove invalid optimization in NAMEConstructor() (patchset #1 id:1 of https://codereview.chromium.org/2548583003/ )

Reason for revert:
The bot was not affected by the revert. Speculation was wrong.

Original issue's description:
> Revert of [typedarrays] remove invalid optimization in NAMEConstructor() (patchset #1 id:1 of https://codereview.chromium.org/2544503002/ )
>
> Reason for revert:
> Speculative revert for causing timeouts on Win Debug gpu fyi bot
>
> Nothing else looks even remotely relevant in the list of changes.
> Will reland if this doesn't fix the issues.
>
> BUG=670396
>
> Original issue's description:
> > [typedarrays] remove invalid optimization in NAMEConstructor()
> >
> > Before, we were treating objects with the builtin ArrayValues iterator
> > method as array-like, where the iterator would iterate through to the
> > full length of the object.
> >
> > This optimization was not sound, because it does not ensure that the
> > next method hasn't been modified. Even if it hasn't been modified,
> > it's entirely possible to be modified during iteration. Thus, this
> > optimization has been removed due to its observability.
> >
> > BUG=v8:5699
> > R=littledan@chromium.org, cbruni@chromium.org
> >
> > Committed: https://crrev.com/77df8c67d9609ada3b7d79e8e6d33f198bbad5a1
> > Cr-Commit-Position: refs/heads/master@{#41394}
>
> TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=v8:5699
>
> Committed: https://crrev.com/0ea4a542202d501c4e550474e89512532571f3a0
> Cr-Commit-Position: refs/heads/master@{#41461}

TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com,enne@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=670396

Review-Url: https://codereview.chromium.org/2553873002
Cr-Commit-Position: refs/heads/master@{#41504}

-- New JSObject for promises: JSPromise

Builtins
-- PromiseThen TFJ
-- PromiseCreateAndSet TFJ for internal use
-- PerformPromiseThen TFJ for internal use
-- PromiseInit for initial promise setup
-- SpeciesConstructor for use in PromiseThen
-- ThrowIfNotJSReceiver for use in SpeciesConstructor
-- AppendPromiseCallback to update FixedArray with new callback
-- InternalPerformPromiseThen

Promises.js
-- Cleanup unused symbols
-- Remove PerformPromiseThen
-- Remove PromiseThen
-- Remove PromiseSet
-- Remove PromiseAttachCallbacks

Runtime
-- PromiseSet to set promise inobject values
-- Refactor functions to use FixedArrays for callbacks instead of
   JSArray
-- Runtime_PromiseStatus to return promise status
-- Runtime_PromiseResult to return promise result
-- Runtime_PromiseDeferred to return deferred attached to promise
-- Runtime_PromiseRejectReactions to return reject reactions attached
   to promise

This CL results in a 13.07% improvement in the promises benchmark
(over 5 runs).

BUG=v8:5343

Review-Url: https://codereview.chromium.org/2536463002
Cr-Commit-Position: refs/heads/master@{#41503}

During bootstrapping when installing the global object we copy over the
properties from the snapshotted global object to the one created from a
provided template. Originally Genesis::TransferNamedProperties just iterated
over the entries, making the final order hash and thus platform dependent.
This CL fixes this by sorting the keys by enumeration index before copying them
to the destination object and thus making the key enumaration on the global
object platform independent.

Drive-by-fix: avoid crash when printing the global object during bootstrapping.

BUG=chromium:669029

Review-Url: https://codereview.chromium.org/2533223002
Cr-Commit-Position: refs/heads/master@{#41502}

It only contained type definitions and static functions, so we
can also just make it a namespace.

R=kozyatinskiy@chromium.org, yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2549133002
Cr-Commit-Position: refs/heads/master@{#41501}

This avoids the crash which ClusterFuzz found, but still does not
report the same position as without validate.asm.
For calls like "foo()|0", we report the position of the call instead of
the position of the "|" if ToNumber throws an error.

After this CL, the correctness-fuzzer for validate-asm will probably
find mismatches there.

R=titzer@chromium.org
BUG=chromium:670808

Review-Url: https://codereview.chromium.org/2548323002
Cr-Commit-Position: refs/heads/master@{#41500}

It's no longer necessary, and has been off for a year.

BUG=

Review-Url: https://codereview.chromium.org/2553643002
Cr-Commit-Position: refs/heads/master@{#41499}

Reorders the jump bytecodes so that the majority of jump checks can be
implemented as range checks (rather than a list of comparisons that get
compiled to a bunch of jumps).

Review-Url: https://codereview.chromium.org/2537123002
Cr-Commit-Position: refs/heads/master@{#41498}

BUG=

Review-Url: https://codereview.chromium.org/2545773003
Cr-Commit-Position: refs/heads/master@{#41497}

R=franzih@chromium.org

Review-Url: https://codereview.chromium.org/2551883002
Cr-Commit-Position: refs/heads/master@{#41496}

R=adamk@chromium.org, verwaest@chromium.org
BUG=v8:5698

Review-Url: https://codereview.chromium.org/2537413003
Cr-Commit-Position: refs/heads/master@{#41495}

Roll includes:
- [inspector_protocol] Move imported/exported information to config options.
- [inspector_protocol] Restructure generator code.

BUG=chromium:664683

Review-Url: https://codereview.chromium.org/2553513002
Cr-Commit-Position: refs/heads/master@{#41494}

This moves all helper functions to the RegExpBuiltinsAssembler together
with some follow-up cleanups for:

* consistent function names,
* consistent parameter names and order,
* removal of global CVariable and CLabel typedefs.

BUG=v8:5339

Review-Url: https://codereview.chromium.org/2554453003
Cr-Commit-Position: refs/heads/master@{#41493}

BUG=

Review-Url: https://codereview.chromium.org/2549083002
Cr-Commit-Position: refs/heads/master@{#41492}

BUG=v8:5339

Review-Url: https://codereview.chromium.org/2543243002
Cr-Commit-Position: refs/heads/master@{#41491}

Microbenchmarks show 25% improvement over C++, 11% improvement over JS
for the constructor. We don't have a microbenchmark covering the compile
method.

Locally, octane/regexp improved by 2%.

BUG=v8:5339

Review-Url: https://codereview.chromium.org/2551443002
Cr-Commit-Position: refs/heads/master@{#41490}

Calls that are potential eval calls are funneled through bytecode and
hence no longer use the {AstGraphBuilder} by now. Associated bailout
points can be removed.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2549113002
Cr-Commit-Position: refs/heads/master@{#41489}

This CL adds a new header src/debug/interface-types.h, moves the
definition of Location from the debug-interface.h to this new header,
and adds a new definition for the WasmDisassembly types.
This allows to use the types in other implementation files or headers
without having to include the entire debug-interface.h, reducing build
dependencies and compile time (especially for incremental builds).

The WasmDisassembly type replaces the old
std::pair<std::string, std::vector<std::tuple<...>>>, which was a bit
hard to unravel.

R=yangguo@chromium.org, kozyatinskiy@chromium.org, titzer@chromium.org

Review-Url: https://codereview.chromium.org/2529383002
Cr-Commit-Position: refs/heads/master@{#41488}

Short living closures are very common in Node.js. This benchmark tracks progress
as we move the optimizations that are currently only behind
--mark_shared_functions_for_tier_up to the default settings.

BUG=v8:5512

Committed: https://crrev.com/f277da2a00cfd27d44a33a70213a65bd82d0bc95
Review-Url: https://codereview.chromium.org/2525053002
Cr-Original-Commit-Position: refs/heads/master@{#41246}
Cr-Commit-Position: refs/heads/master@{#41487}

R=bmeurer@chromium.org

BUG=

Review-Url: https://codereview.chromium.org/2549093002
Cr-Commit-Position: refs/heads/master@{#41486}

This allows us to optimise the bytecode liveness analysis to jump
directly to previously seen indices. The analysis is optimised to store
a stack of loop ends (JumpLoop bytecode indices), and iterate through
these indices directly rather than looping through the bytecode array to
find them.

Review-Url: https://codereview.chromium.org/2536653003
Cr-Commit-Position: refs/heads/master@{#41485}

Don't unconditionally assume that Tagged->Word32 changes are always
truncating independent of the type of the input. Work-around the
remaining issues with for-in by properly renaming the index if it's
not already of appropriate type (happens with generators or OSR).

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2545393002
Cr-Commit-Position: refs/heads/master@{#41484}

1) CSA::Select() receives lambdas for generating true/false values.
   The representation parameter made mandatory.
2) CSA::Select[Type]Constant() methods receive true/false nodes directly.
   These methods are intended to be used for generating "selects" when
   true/false values are already computed.

BUG=

Review-Url: https://codereview.chromium.org/2550683003
Cr-Commit-Position: refs/heads/master@{#41483}

The changes are:
1) Pass lambdas as const references to avoid unnecessary copying.
2) Remove CodeStubAssembler* parameter from loop bodies and let the lambdas
   capture the right assembler instead. It makes the loop body code look
   uniform with the surrounding code and unblocks splitting of a CSA
   into different classes.

BUG=

Review-Url: https://codereview.chromium.org/2535753012
Cr-Commit-Position: refs/heads/master@{#41482}

Review-Url: https://codereview.chromium.org/2521313002
Cr-Commit-Position: refs/heads/master@{#41481}

Now that the BASE_EMBEDDED macro is gone, this should be safe.

Originally removed in: https://codereview.chromium.org/2532103004/

Review-Url: https://codereview.chromium.org/2545723002
Cr-Commit-Position: refs/heads/master@{#41480}

This reverts commit aea4f1a7.

Reason: performance regression on benchmarks (crbug.com/671118).

BUG=chromium:671118,chromium:613518
TBR=hpayer@chromium.org

Review-Url: https://codereview.chromium.org/2549053002
Cr-Commit-Position: refs/heads/master@{#41479}

This removes support for accessing super properties (load, store & call)
from the {FullCodeGenerator}. Consequently optimized code containing
such constructs must use the {BytecodeGraphBuilder} and can no longer
use the {AstGraphBuilder} for graph building.

R=bmeurer@chromium.org
BUG=v8:5657

Review-Url: https://codereview.chromium.org/2544123004
Cr-Commit-Position: refs/heads/master@{#41478}

R=clemensh@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2551463002
Cr-Commit-Position: refs/heads/master@{#41477}

This was somehow missing so far. With this CL, we can disassembly all
functions on AngryBots.

R=titzer@chromium.org, rossberg@chromium.org
BUG=chromium:659715

Review-Url: https://codereview.chromium.org/2552643002
Cr-Commit-Position: refs/heads/master@{#41476}

The bot will be renamed in a follow up, when the infra side is renamed.

TBR=zhengxing.li@intel.com, vogelheim@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2549033002
Cr-Commit-Position: refs/heads/master@{#41475}