* Skip 8 tests that timeout due to the low-performance of current MMTk non-moving GC.
  - This will be enabled after TPH performance issues are addressed.
* Skip 2 new tests that creates a second isolate -- TPH does not support it at the moment.
* Skip 1 test that expects concurrent sweeping behavior of cppgc.

Bug: v8:11641
Change-Id: If86cdcc303b01536d278368886bb30d91da5c5c1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2909692
Auto-Submit: Wenyu Zhao <wenyu.zhao@anu.edu.au>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75036}

Tbr: neis@chromium.org
Bug: v8:7790
Change-Id: Iaa094977b3c1099880ead9819df8418bc85e3dde
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947416Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75035}

This reverts commit 7ef67b2e.

Reason for revert: Speculative revert for a blocked roll - https://chromium-review.googlesource.com/c/chromium/src/+/2947365

Original change's description:
> heap: Fix initial GC configuration for C++-only heaps
>
> Heaps in V8 start with a large limit that is shrunk upon young
> generation GCs, based on some liveness estimate. This provides best
> throughput during startup while at the same time finding a reasonable
> first limit.
>
> For C++ (embedder memory) there is no estimate which is why it was
> piggy-backing on V8. This breaks in scenarios where no JS memory is
> allocated.
>
> In this fix we start a memory reducer after embedder memory has hit
> the activation threshold if no GC happened so far. As soon as a single
> Scavenger has happened, we leave it up to the JS estimate to figure
> out a limit. Memory reducing GCs will then find a regular limit based
> on the initial live size.
>
> Drive-by: Give embedders the same activiation threshold of 8MB as JS.
>
> Bug: chromium:1217076
> Change-Id: I8469696002ac2af8d75d6b47def062d2608387a1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944935
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#75012}

Bug: chromium:1217076
Change-Id: Ic1530162e846c2a767ea5ea902a01a21967d8e35
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947419
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#75034}

This is a step towards making JSObjectRef non-serialized.

Change JSObjectRef::RawFastPropertyAt to use a direct load with
relaxed semantics. Special handling of `uninitialized` sentinel values
is moved to the only use-site.

A new lock `boilerplate_migration_access` protects against concurrent
boilerplate migrations while we are iterating over properties.

Bug: v8:7790
Change-Id: Ic9de54ca16c1f3364d497a77058cfa33d48dd4a4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2928184
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75033}

This reverts commit eb3ce72b.

Reason for revert: Broke Android Arm64 Builder, see https://bugs.chromium.org/p/chromium/issues/detail?id=1217912

Original change's description:
> Update V8 DEPS.
>
> Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/8870cb4..921ea58
>
> Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/a8bae77..df0a59a
>
> Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/b508ecd..b14cdae
>
> Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/0c64e83..d987b04
>
> TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com
>
> Change-Id: I8906ce650c866bd771910fea5db6c735bfe0c7e2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947396
> Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
> Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/master@{#75029}

Change-Id: I4d83f012cf04ab94eb66bab9a8ebec04ed098fbf
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947417
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#75032}

In issue 11290, we disabled the propagation of EAL data out of
lookarounds, because it was incorrect for lookahead nodes in
loops. This caused performance regressions: for example,
`/^\P{Letter}+$/u` (matching only characters that are not in Unicode's
Letter category) uses negative lookahead when matching lone
surrogates, and became about 2x slower. I spent some time looking into
fixes, and this is what I've settled on.

Some background: the implementation of lookarounds in irregexp is
split between positive and negative lookaheads. (Lookbehinds aren't
relevant here, because backwards matches always have EAL=0.)  Positive
lookaheads are wrapped in BEGIN_SUBMATCH and POSITIVE_SUBMATCH_SUCCESS
ActionNodes. BEGIN_SUBMATCH saves the current state.
POSITIVE_SUBMATCH_SUCCESS restores the necessary state (while leaving
any captures that occurred during the lookaround intact).

Negative lookaheads also begin with a BEGIN_SUBMATCH node, but follow
it with a NegativeLookaroundChoiceNode. This node has two successors:
a lookaround node, and a continue node. It only executes the continue
node if the lookaround node backtracks, which automatically restores
the previous state. Negative lookarounds also can't update captures.

This affects EAL calculations. It turns out that negative lookaheads
are already doing the right thing: EatsAtLeastPropagator only
propagates information from the continue node, ignoring the lookaround
node. The same is true for quick checks (see the comment in
RegExpLookaround:Builder::ForMatch). A BEGIN_SUBMATCH for a negative
lookahead can simply propagate the EAL data from its successor like
any other ActionNode, and everything works.

Positive lookaheads are harder. I tried saving a pointer to the
successor in BEGIN_SUBMATCH, but ran into problems in FillInBMInfo,
because the EAL value corresponded to the nodes after the lookahead,
but the analysis was still looking at the nodes inside. I fell back
to a more modest approach: split BEGIN_SUBMATCH in two, and propagate
EAL info for BEGIN_NEGATIVE_SUBMATCH while keeping the current
behaviour for BEGIN_POSITIVE_SUBMATCH. This fixes the performance
regression at hand.

Two potential approaches for fixing EAL for positive lookahead are:
 1. Handling positive lookahead with its own dedicated choice node,
    like NegativeLookaroundChoiceNode.
 2. Adding an eats_at_least_inside_loop field to EatsAtLeastInfo,
    which is <= eats_at_least_from_possibly_start, and using that
    value in EatsAtLeastFromLoopEntry.

Both of those approaches are more complex than I want to tackle
right now, though.

Bug: v8:11844
Change-Id: I2a43509c2c21194b8c18f0a587fa21c194db76c2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2934858Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75031}

The test push stack boundary and too flaky (timeout) while
running machine with more memory.

Bug: v8:11845
Change-Id: I5b603f05270d224de71c735ece5dd65a27311c25
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939082Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75030}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/8870cb4..921ea58

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/a8bae77..df0a59a

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/b508ecd..b14cdae

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/0c64e83..d987b04

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com

Change-Id: I8906ce650c866bd771910fea5db6c735bfe0c7e2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947396Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#75029}

Due to the limits of ia32's calling convention, being able to
avoid construction of "Digits" objects (thanks to inlining)
helps a lot for microbenchmarks.

Fixed: chromium:1192133
Change-Id: I5676640d96a99dc6422f3946c608bcc93ef222ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947410
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75028}

Add "calendar", and "dateTimeField"
Add option for languageDisplay

https://tc39.es/intl-displaynames-v2/
https://chromestatus.com/feature/5082027281874944
Design Doc:
https://docs.google.com/document/d/17hQz4nOC7PJYhxc_MU-BRoT6BnYGZv66XlU1iGX0ywQ/edit#

Bug: v8:11637
Change-Id: Ie7dc80d16956f0e668b11e600e47f5bafb081ff7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2924523
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75027}

Change-Id: I3a4e827f9407286c8665ee032fbbc4552ebd1d89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945272
Commit-Queue: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Auto-Submit: Junliang Yan <junyan@redhat.com>
Reviewed-by: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#75026}

Only return "subset of" the requested Locales.


Bug: v8:11860
Change-Id: I917753c6f0f5dfc7a52d071febbe03abfab45b04
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2946746Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75025}

GetName() is very generic and arleady exists as virtual method in Blink.

Bug: chromium:1056170
Change-Id: I7aa6e869a06c048e7baea45939894717c872d89e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947404
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75024}

See set_parent
https://source.chromium.org/chromium/chromium/src/+/main:v8/src/objects/string-inl.h;l=857;drc=a6207b54d010a5bee8611a6ef08f9bee9a9768cf

Change-Id: I2fa5718c04b281016e2d4cae07b7f36e37176d6e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2947402Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75023}

Add a new testing tier based on Liftoff. In this tier, the Liftoff
compiler takes an address to a counter, and decrements that counter at
every instruction. When the counter reaches 0, execution aborts.

R=clemensb@chromium.org

Bug: v8:11856
Change-Id: I20970e323ff19f7cb6ab6855377c678ca391421e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944440Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75022}

This CL updates Realm.eval() to also handle reading source code as a
JavaScript function or from a file. To distinguish between different
argument types, an additional options bag needs to be provided. If no
options bag is provided, the behavior defaults to the current one,
which is reading source code from a string.

Bug: v8:11525, v8:11706
Change-Id: I68238335eb91171041dca2c83db211c40dd68359
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944435Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Vicky Kontoura <vkont@google.com>
Cr-Commit-Position: refs/heads/master@{#75021}

Currently, the serializer and deserializer assume that all top-level
declarations to be serialized will be objects.

This CL removes this assumption.

Bug: v8:11525, v8:11706
Change-Id: I5acf5e7a3b73aba5ffc5b1d5eb9cb51b3804a4af
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945178Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Vicky Kontoura <vkont@google.com>
Cr-Commit-Position: refs/heads/master@{#75020}

This is needed for JSCallReducer.

Bug: chromium:1217562
Change-Id: I1f06040a74c393598c134301ba0cf04a46380107
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945184Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75019}

Port f68e1be7

Original Commit Message:

    Directly use the correct registers for calling the RecordWrite stubs
    in sparkplug. To keep changes to existing builtins minimal there are
    certain register requirements which are now made explicit in
    WriteBarrierDescriptor::Verify.

R=cbruni@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: Id01f936f96cf231dcfc599b4f2662124bc1a7744
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945832Reviewed-by: Junliang Yan <junyan@redhat.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#75018}

This adds a .mailmap entry to remap clemensh@chromium.org to
clemensb@chromium.org, with Clemens' new name.

R=mathias@chromium.org

Change-Id: If234c59cf9089e71a1baf56115d5ee900f8af275
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2919626Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75017}

Change-Id: I4a30e0f01e35eb0824f5abeec62d55d62970b59f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2910781Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75016}

The initial CL is suspected to break the --predictable CI.
But looks like the CI is still crashing and also flaky after the
revert. So reland it again.

This is a reland of 59d58d72

Original change's description:
> [csa] Remove InnerAllocate and replace with non-folded allocations
>
> This CL removes all uses of InnerAllocate (except memento allocations)
> and replace with non-folded allocations. The change is based on the
> fact that 1. Those InnerAllocates are not guarded by --allocation-folding
> flag. 2. Hopefully the MemoryOptimizer can handle the folding and no
> performance regression will happen.
>
> Two special versions of InnerAllocate is still kept:
> * One for memento allocations (renamed to InnerAllocateMemento).
> * One for AllocateUninitializedJSArrayWithElements (renamed to InnerAllocateElements).
>
> Change-Id: Ie77da6b2fba31b048241f7b7d927065305a01c27
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2873767
> Commit-Queue: Wenyu Zhao <wenyu.zhao@anu.edu.au>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74899}

Change-Id: I540c3a6b6e3f7c70c048f8ad1e5f702287fb086b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2946667
Commit-Queue: Wenyu Zhao <wenyu.zhao@anu.edu.au>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75015}

Add flag --trace-baseline-batch-compilation to enable tracing for
baseline batch compilation.

Bug: v8:11790
Change-Id: I2b05017181b95bf3bccb70e2092250211dafb86c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945174Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75014}

Predictable does not contradict --wasm-tier-up any more, hence unskip
the tests.

R=ahaas@chromium.org

Bug: v8:11319, v8:11848
Change-Id: Iaefcf6c80e65d27c527aa1a45b054ace1d85fe39
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2945171
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75013}

Heaps in V8 start with a large limit that is shrunk upon young
generation GCs, based on some liveness estimate. This provides best
throughput during startup while at the same time finding a reasonable
first limit.

For C++ (embedder memory) there is no estimate which is why it was
piggy-backing on V8. This breaks in scenarios where no JS memory is
allocated.

In this fix we start a memory reducer after embedder memory has hit
the activation threshold if no GC happened so far. As soon as a single
Scavenger has happened, we leave it up to the JS estimate to figure
out a limit. Memory reducing GCs will then find a regular limit based
on the initial live size.

Drive-by: Give embedders the same activiation threshold of 8MB as JS.

Bug: chromium:1217076
Change-Id: I8469696002ac2af8d75d6b47def062d2608387a1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944935Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75012}

Bug: v8:7748
Change-Id: I4d1badcc31accfc1a2efcd0d12118e7aa436e610
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940894
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75011}

Bug: v8:11420
Change-Id: Ic2b977c41dd71426838e1039b66dc7936cc4ff98
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2933658Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75010}

This is a reland of 79d63a5e. Some fixes
landed already, and two tests need to be skipped now (one with a tracking
bug).

Original change's description:
> [wasm] Remove all implications from --predictable
>
> In predictable mode, we want to execute the same code as otherwise,
> modulo timing. Hence remove any implications which change behaviour
> (like tier-up or asynchronous compilation).
> Note that --predictable is a debugging flag, so the configurations does
> not need to "make sense" in production.
>
> R=ahaas@chromium.org
>
> Bug: v8:11848
> Change-Id: If74fbacadeb087d977922c41f33fd18738b50ded
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940898
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74973}

Bug: v8:11848
Change-Id: I3564e4351d6545bb9643d1ae44722eb2606b8961
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944936Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75009}

- Scale svg flamechart directly instead of rerendering
- Convert markers to SVG as well
- Fix scroll position after zooming
- Support tooltips for flamechart

Change-Id: I01c966d2705989cf45a91c64aa4302a8de035414
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944894
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75008}

The predictable platform only executed background tasks if at least one
foreground task was executed. Async compilation in Wasm only spawns a
background task though, so that one could be missed.

This CL fixes the loop to also execute background tasks if no foreground
task was executed.

R=ahaas@chromium.org

Bug: v8:11848
Change-Id: Ia0b32427c24a79d5710c784b98528bf431471528
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944833Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75007}

Changes:
- Add struct.new_with_rtt as a new WasmInitExpr. Parse it in
  consume_init_expr(). Add it to
  InstanceBuilder::EvaluateInitExpression().
- Change WasmInitExpr::operand_ to vector operands_.
- In consume_init_expr(), use parsed over hard-coded opcode length.
- Improve WasmStruct::WasmStructPrint slightly.
- Add Factory::NewWasmStruct().
- Add WasmValue::CopyToWithSystemEndianness.
- In wasm-module-builder.js, generalize emit_init_expr for expressions
  with operands. Add missing init. expression types.
- Add tests.

Bug: v8:7748
Change-Id: Ica12378d202730aff1b57c7d4240aa00ef124f8e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940893
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75006}

This reverts commit febfbb21.

Reason for revert: Introduced new bugs:
https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Mac64%20-%20debug/34472/overview

Original change's description:
> [sparkplug] Adjust compare and jump function in sparkplug
>
> Mips and risc-v do not have the flag register and can not decide
> whether to jump through flags in JumpIf();
>
> Therefor, we merge the comparison with the jump;
>
> Bug: v8:11803
>
> Change-Id: If53752da93b97e8ff65affdfe99e5de8e1a1493f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2921034
> Auto-Submit: Liu yu <liuyu@loongson.cn>
> Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#75001}

Bug: v8:11803
Change-Id: Ic982564ccdef9a07bf3a5fb4745a11cfa178cc0e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2946818
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#75005}

This commit adds a TryGetCurrent() method to the v8::Isolate class.

The motivation for adding this method this is that in Node.js we've run
into situations where we need to check if there is a current
Isolate and we are using GetCurrent() for this. The issue is that for a
debug build of Node.js, the debug check in GetCurrent() will cause a
failure.

The suggestion in this changeset is to allow getting the current
Isolate, or null if one does not exist, without any checks.

Change-Id: I01676e4bcdbe86da0496f5df1982d14eb1c9ebf8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2910630Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75004}

Some supplements on mips for 8ab75a56

Change-Id: Id0928e59b6a265f34a4ee986fa80e6b9dee0198c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2946812
Auto-Submit: Liu yu <liuyu@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#75003}

Jobs were still being posted on the underlying default platform, which
caused concurrent execution. By directly returning a
{NewDefaultJobHandle} with a pointer to the {PredictablePlatform}, we
force execution of all posted tasks via that platform.

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

Bug: v8:11848
Change-Id: Ie10519583341b427776ca428f85641e96f821367
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944808Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75002}

Mips and risc-v do not have the flag register and can not decide
whether to jump through flags in JumpIf();

Therefor, we merge the comparison with the jump;

Bug: v8:11803

Change-Id: If53752da93b97e8ff65affdfe99e5de8e1a1493f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2921034
Auto-Submit: Liu yu <liuyu@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75001}

The flag had no effect and was removed from fuzzilli instructions here:
https://github.com/googleprojectzero/fuzzilli/commit/f31bfb7b5a3364e4cbcf7661f621fb5347521560

No-Try: true
Change-Id: If28e79fdf469a4cb665a83793c9fef8c6c2a8232
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944431
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75000}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/e353b02..8870cb4

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/eb65cc3..c793cca

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/8bf7a0b..a8bae77

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/a5b6b2f..b508ecd

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/30cbc5c..0c64e83

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com

Change-Id: Ib0903c26326e045b1f2b1e2ac2f37dd3a883e6ed
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2946109Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#74999}

Directly use the correct registers for calling the RecordWrite stubs
in sparkplug. To keep changes to existing builtins minimal there are
certain register requirements which are now made explicit in
WriteBarrierDescriptor::Verify.


Bug: v8:11420
Change-Id: I3a0c500fbe26f82ee2243a61dbf574fd31656982
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2910313Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74998}

Test262 with extra variants times out on several debug bots regularly:
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20-%20debug/37382
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20debug/35401
https://ci.chromium.org/p/v8/builders/try.triggered/v8_linux64_dbg_ng_triggered/b8845063257835477664

Bug: v8:11428
Change-Id: I749556be0e5dd5ce788ee66ba10e1431ebf47b93
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944938
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74997}