Store buffer is used for writes that are coming from the mutator. Writes coming from the GC are directly added to the remembered set.

BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2528563003
Cr-Commit-Position: refs/heads/master@{#41263}

Because they sometimes are.

R=rossberg@chromium.org
BUG=v8:5648

Review-Url: https://codereview.chromium.org/2524333002
Cr-Commit-Position: refs/heads/master@{#41262}

Revert of [test] Add performance test for closures. (patchset #1 id:1 of https://codereview.chromium.org/2525053002/ )

Reason for revert:
Fails on perf.

Original issue's description:
> [test] Add performance test for closures.
>
> 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
> Cr-Commit-Position: refs/heads/master@{#41246}

TBR=bmeurer@chromium.org,leszeks@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5512

Review-Url: https://codereview.chromium.org/2526163003
Cr-Commit-Position: refs/heads/master@{#41261}

This has two parts:
- in redundancy elimination, if we see addition with left hand side that
  was bounds-checked, we reconnect the lhs to the bounds check if it has better
  type.
- in representation inference, eliminate overflow checks if the input types
  guarantee no overflow.

Review-Url: https://codereview.chromium.org/2527083002
Cr-Commit-Position: refs/heads/master@{#41260}

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

Review-Url: https://codereview.chromium.org/2524323002
Cr-Commit-Position: refs/heads/master@{#41259}

BUG=v8:4586,v8:5633
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2512733003
Cr-Commit-Position: refs/heads/master@{#41258}

In the ParseInfo constructor that takes a SharedFunctionInfo, we must
set the module flag when the function represents a module.

BUG=v8:1569

Review-Url: https://codereview.chromium.org/2525013002
Cr-Commit-Position: refs/heads/master@{#41257}

In most cases we can use the debug event listener as alternative.
Multithreaded tests are obsolete.

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

Review-Url: https://codereview.chromium.org/2529883002
Cr-Commit-Position: refs/heads/master@{#41256}

The old algorithm produces unnecessary decimal digits. The new one
converts the significand of the input double into an uint64_t to be
just as precise as necessary.

R=tebbi@chromium.org
BUG=chromium:658712,chromium:666376

Review-Url: https://codereview.chromium.org/2520363002
Cr-Commit-Position: refs/heads/master@{#41255}

RuntimeTimerScopes always subtract their own time from the parent timer's
counter to properly account for the own time. Once a scope is destructed it
adds it own timer to the current active counter. However, if the current
counter is changed with CorrectCurrentCounterId we will attribute all the
subtimers to the previous counter, and add the own time to the new counter.
This way it is possible to end up with negative times in certain counters but
the overall would still be correct.

BUG=

Review-Url: https://codereview.chromium.org/2511093002
Cr-Commit-Position: refs/heads/master@{#41254}

The catch scopes were created with the wrong parent scope.

R=littledan@chromium.org
BUG=v8:5648

Committed: https://crrev.com/f385268d11d6da9508e481202b39f75f4b56afdd
Review-Url: https://codereview.chromium.org/2520883002
Cr-Original-Commit-Position: refs/heads/master@{#41222}
Cr-Commit-Position: refs/heads/master@{#41253}

Revert of [cleanup] Refactor builtins-number.cc (patchset #2 id:40001 of https://codereview.chromium.org/2517833005/ )

Reason for revert:
Secondary dependency to revert https://codereview.chromium.org/2522393002/

Original issue's description:
> [cleanup] Refactor builtins-number.cc
>
> Introducing a TF_BUILTIN macro that wraps CodeStubAssembler usage
> into a convenient interface (using a subclass under the hood).
>
> Committed: https://crrev.com/cbf59c4c704e83a43b52c5ba6825df576fdaece8
> Cr-Commit-Position: refs/heads/master@{#41236}

TBR=ishell@chromium.org,jkummerow@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/2529873002
Cr-Commit-Position: refs/heads/master@{#41252}

Revert of [stubs] KeyedStoreGeneric: inline dictionary property stores (patchset #2 id:10002 of https://codereview.chromium.org/2524943002/ )

Reason for revert:
Blocks current roll:
https://codereview.chromium.org/2526753003/

Bisect results:
https://codereview.chromium.org/2531483002

Original issue's description:
> Reland of [stubs] KeyedStoreGeneric: inline dictionary property stores
>
> For dictionary-mode receivers, the KeyedStoreGeneric stub can store
> properties directly in most cases. Doing so avoids the need to have
> an entry in the stub cache for every map/property combination.
>
> Original review: https://codereview.chromium.org/2504403005/
>
> Committed: https://crrev.com/7a963deb85a0cc04623947a759534c48e2871901
> Cr-Commit-Position: refs/heads/master@{#41218}

TBR=ishell@chromium.org,machenbach@chromium.org,jkummerow@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/2522393002
Cr-Commit-Position: refs/heads/master@{#41251}

Revert of [stubs] Fix AccessorInfo mixup in KeyedStoreGeneric (patchset #1 id:1 of https://codereview.chromium.org/2525913002/ )

Reason for revert:
Needed to revert 2661b3e8

Original issue's description:
> [stubs] Fix AccessorInfo mixup in KeyedStoreGeneric
>
> BUG=chromium:668101
>
> Committed: https://crrev.com/2661b3e8a5447773a23a219ba085454c459b654b
> Cr-Commit-Position: refs/heads/master@{#41223}

TBR=ishell@chromium.org,jkummerow@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:668101

Review-Url: https://codereview.chromium.org/2525253002
Cr-Commit-Position: refs/heads/master@{#41250}

Revert of [cleanup] CodeStubAssembler: s/compiler::Node/Node/ (patchset #1 id:1 of https://codereview.chromium.org/2526803002/ )

Reason for revert:
Needed to revert https://codereview.chromium.org/2522393002/

Original issue's description:
> Reland of [cleanup] CodeStubAssembler: s/compiler::Node/Node/
>
> Reducing visual clutter.
>
> No changes since previous attempt; this was only reverted because it blocked another revert.
> Original review: https://codereview.chromium.org/2519093002/
>
> TBR=ishell@chromium.org
>
> Committed: https://crrev.com/c28bee0fdd297d2ef4fc88b5fe289cc9dbd664f6
> Cr-Commit-Position: refs/heads/master@{#41235}

TBR=ishell@chromium.org,jkummerow@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/2529863002
Cr-Commit-Position: refs/heads/master@{#41249}

Presubmit on upload and on trybot will use the affected files as
determined by the presubmit input_api.

The continuously run presubmit will use the old method and search all
files.

BUG=v8:5603
NOTRY=true

Review-Url: https://codereview.chromium.org/2523993003
Cr-Commit-Position: refs/heads/master@{#41248}

We can't use "this" after calling agent code since agent code can destroy dispatcher.

BUG=chromium:668358
TBR=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2526183002
Cr-Commit-Position: refs/heads/master@{#41247}

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

Review-Url: https://codereview.chromium.org/2525053002
Cr-Commit-Position: refs/heads/master@{#41246}

The deprecated pipeline is used for asm.js only, where we forcibly
disable inlining anyways (for performance reasons), so inlining via
the AstGraphBuilder is essentially dead code by now, thus there's no
point in trying to keep that around in the code base.

Also nuke the test-run-inlining.cc file, which would require some heavy
surgery (for probably little benefit), and move the useful tests for
mjsunit tests instead.

BUG=v8:2206,v8:5657
R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2527053002
Cr-Commit-Position: refs/heads/master@{#41245}

This exposes scopes for suspended generator objects by adding a
[[Scopes]] internal property to generator objects, similar to how
scopes for functions currently not on the stack are handled.

BUG=chromium:667286

Review-Url: https://codereview.chromium.org/2516973003
Cr-Commit-Position: refs/heads/master@{#41244}

Revert of Use parenthesis in descriptions for array/map/set lengths/sizes (patchset #3 id:40001 of https://codereview.chromium.org/2521853003/ )

Reason for revert:
Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/11595

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

Original issue's description:
> Use parenthesis in descriptions for array/map/set lengths/sizes
>
> Descriptions for (typed)arrays will use parenthesis instead of square brackets
> "Array(10)" instead of "Array[10]". This CL also adds size hints to descriptions
> of maps and sets.
>
> Related CL for DevTools: https://codereview.chromium.org/2524913002/
>
> BUG=405845
>
> Committed: https://crrev.com/92c77a57390e6a9ef726535b255a24359751992d
> Cr-Commit-Position: refs/heads/master@{#41237}

TBR=dgozman@chromium.org,kozyatinskiy@chromium.org,luoe@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=405845

Review-Url: https://codereview.chromium.org/2530803002
Cr-Commit-Position: refs/heads/master@{#41243}

Recognize Date.now() calls in the Typer and assign the proper integer
type to them.

See Node issue https://github.com/nodejs/node/issues/9729 for more
information.

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

Review-Url: https://codereview.chromium.org/2528853003
Cr-Commit-Position: refs/heads/master@{#41242}

Also lower JSToBoolean(x) where x is either some detectable receiver or
null, or any kind of receiver, null or undefined. Also fix a couple of
minor issues with the JSToBoolean lowering and tests.

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

Review-Url: https://codereview.chromium.org/2530773002
Cr-Commit-Position: refs/heads/master@{#41241}

Recognize a couple of builtins on the RegExp.prototype in the Typer and
assign useful types to them, so we can optimize various checks on their
results.

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

Review-Url: https://codereview.chromium.org/2531463002
Cr-Commit-Position: refs/heads/master@{#41240}

This fixes a bug where the re-creation of phi nodes leads to divergence. The fix makes sure that once a node created a phi node, it sticks to it and does not forget about it, even if the inputs suddenly agree again. The bug appeared on the trybots in https://codereview.chromium.org/2512733003/.

Also I added a line to mark effect phi nodes on the queue. This is unrelated, but seems to be an obvious ommission.

R=bmeurer@chromium.org
BUG=v8:5633

Review-Url: https://codereview.chromium.org/2522253002
Cr-Commit-Position: refs/heads/master@{#41239}

BUG=

R=joransiu@ca.ibm.com, michael_dawson@ca.ibm.com, bjaideep@ca.ibm.com

Review-Url: https://codereview.chromium.org/2522283003
Cr-Commit-Position: refs/heads/master@{#41238}

Descriptions for (typed)arrays will use parenthesis instead of square brackets
"Array(10)" instead of "Array[10]". This CL also adds size hints to descriptions
of maps and sets.

Related CL for DevTools: https://codereview.chromium.org/2524913002/

BUG=405845

Review-Url: https://codereview.chromium.org/2521853003
Cr-Commit-Position: refs/heads/master@{#41237}

Introducing a TF_BUILTIN macro that wraps CodeStubAssembler usage
into a convenient interface (using a subclass under the hood).

Review-Url: https://codereview.chromium.org/2517833005
Cr-Commit-Position: refs/heads/master@{#41236}

Reducing visual clutter.

No changes since previous attempt; this was only reverted because it blocked another revert.
Original review: https://codereview.chromium.org/2519093002/

TBR=ishell@chromium.org

Review-Url: https://codereview.chromium.org/2526803002
Cr-Commit-Position: refs/heads/master@{#41235}

Add support for WebAssembly.Memory objects to be simultaneously referenced by multiple Instance objects. GrowingMemory should maintain a consistent view of memory across instances.
 - Store a link to instances that share WebAssembly.Memory in the WasmMemoryObject, updated on instantiate.
 - Implement WasmInstanceWrapper as a wrapper around the instance object to keep track of previous/next instances, instance object is stored as a WeakCell that can be garbage collected.
 - MemoryInstanceFinalizer maintains a valid list of instances when an instance is garbage collected.
 - Refactor GrowInstanceMemory to GrowMemoryBuffer that allocates a new buffer, and UncheckedUpdateInstanceMemory that updates memory references for an instance.

 R=titzer@chromium.org, mtrofin@chromium.org, bradnelson@chromium.org

Committed: https://crrev.com/30ef8e33f3a199a27ca8512bcee314c9522d03f6
Committed: https://crrev.com/3c98e339599b068f1ed630afb7601ff942424d31
Review-Url: https://codereview.chromium.org/2471883003
Cr-Original-Original-Commit-Position: refs/heads/master@{#41121}
Cr-Original-Commit-Position: refs/heads/master@{#41198}
Cr-Commit-Position: refs/heads/master@{#41234}

BUG=

Review-Url: https://codereview.chromium.org/2524733007
Cr-Commit-Position: refs/heads/master@{#41233}

New console.assert implementation is faster then custom user implementation.

BUG=chromium:663845
R=dgozman@chromium.org

Committed: https://crrev.com/f658e41d864267fb9e99ea76faa7758b0b63d5c9
Review-Url: https://codereview.chromium.org/2505493002
Cr-Original-Commit-Position: refs/heads/master@{#41227}
Cr-Commit-Position: refs/heads/master@{#41232}

Revert of [inspector] make console.assert much faster (patchset #3 id:40001 of https://codereview.chromium.org/2505493002/ )

Reason for revert:
Speculative revert as there seems to be a layout test crash:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/11585

Please reland if it doesn't get green.

Original issue's description:
> [inspector] make console.assert much faster
>
> New console.assert implementation is faster then custom user implementation.
>
> BUG=chromium:663845
> R=dgozman@chromium.org
>
> Committed: https://crrev.com/f658e41d864267fb9e99ea76faa7758b0b63d5c9
> Cr-Commit-Position: refs/heads/master@{#41227}

TBR=dgozman@chromium.org,yangguo@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:663845

Review-Url: https://codereview.chromium.org/2521323005
Cr-Commit-Position: refs/heads/master@{#41231}

Revert of [heap] Refactor heap object iteration (patchset #6 id:100001 of https://codereview.chromium.org/2516303006/ )

Reason for revert:
Breaks msan:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/builds/12103

Original issue's description:
> [heap] Refactor heap object iteration
>
> BUG=
>
> Committed: https://crrev.com/d094fa76f3dd0bb5fc3f4c669762aa97d88e0f76
> Cr-Commit-Position: refs/heads/master@{#41226}

TBR=hpayer@chromium.org,mlippautz@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/2529663002
Cr-Commit-Position: refs/heads/master@{#41230}

Revert of [counters] RuntimeStats: fix wrong bookkeeping when dynamically changing counters. (patchset #15 id:320001 of https://codereview.chromium.org/2511093002/ )

Reason for revert:
The test is very flaky on the bots, e.g.:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20ASAN/builds/17031
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20shared/builds/14776

Original issue's description:
> [counters] RuntimeStats: fix wrong bookkeeping when dynamically changing counters
>
> RuntimeTimerScopes always subtract their own time from the parent timer's
> counter to properly account for the own time. Once a scope is destructed it
> adds it own timer to the current active counter. However, if the current
> counter is changed with CorrectCurrentCounterId we will attribute all the
> subtimers to the previous counter, and add the own time to the new counter.
> This way it is possible to end up with negative times in certain counters but
> the overall would still be correct.
>
> BUG=
>
> Committed: https://crrev.com/f6c74d964d9387df4bed3d8c1ded51eb9e8aa6e8
> Committed: https://crrev.com/491651792d7818aed04eaeffb9890b5a309b543e
> Cr-Original-Commit-Position: refs/heads/master@{#41142}
> Cr-Commit-Position: refs/heads/master@{#41214}

TBR=ishell@chromium.org,fmeawad@chromium.org,lpy@chromium.org,cbruni@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/2526843002
Cr-Commit-Position: refs/heads/master@{#41229}

Revert of [parser] Fix scopes in rewriting of for-of and destructuring assignments. (patchset #6 id:100001 of https://codereview.chromium.org/2520883002/ )

Reason for revert:
Speculative revert: Seems to break jsfunfuzz:
https://build.chromium.org/p/client.v8/builders/V8%20Fuzzer/builds/14385

Original issue's description:
> [parser] Fix scopes in rewriting of for-of and destructuring assignments.
>
> The catch scopes were created with the wrong parent scope.
>
> R=littledan@chromium.org
> BUG=v8:5648
>
> Committed: https://crrev.com/f385268d11d6da9508e481202b39f75f4b56afdd
> Cr-Commit-Position: refs/heads/master@{#41222}

TBR=littledan@chromium.org,verwaest@chromium.org,neis@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5648

Review-Url: https://codereview.chromium.org/2519333005
Cr-Commit-Position: refs/heads/master@{#41228}

New console.assert implementation is faster then custom user implementation.

BUG=chromium:663845
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2505493002
Cr-Commit-Position: refs/heads/master@{#41227}

BUG=

Review-Url: https://codereview.chromium.org/2516303006
Cr-Commit-Position: refs/heads/master@{#41226}

R=mstarzinger@chromium.org, neis@chromium.org

BUG=v8:5657

Review-Url: https://codereview.chromium.org/2526763002
Cr-Commit-Position: refs/heads/master@{#41225}

R=yangguo@chromium.org
BUG=chromium:667142

Review-Url: https://codereview.chromium.org/2525663003
Cr-Commit-Position: refs/heads/master@{#41224}