... when v8_enable_short_builtin_calls is enabled for current build
configuration.

Bug: v8:11527
Change-Id: Ie7edf7ede5822f3b8f7ec815c89d0c50ec7657bc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2770880
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73505}

Fix target stack height of multi-value try blocks.

R=clemensb@chromium.org

Bug: chromium:1187896
Change-Id: I698b06141e65f7b545a695c035b862af31dd8875
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2772236Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73504}

... because serialization of RUNTIME_ENTRY reloc infos is not supported
yet.

Bug: v8:11527
Change-Id: I0a0451710f7dd57b6393b8fad1620d29346a9f49
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2772602Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73503}

This reverts commit a3b1233e.

Reason for revert: This approach has multiple issues and we have to reconsider it.

Original change's description:
> [turbofan] Optimize TrapIf/Unless in BranchElim. and CommonOp-Reducer
>
> Bug: v8:11510
> Change-Id: I1e8fcb54444e494c7d765ad556d09d954441361f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2752876
> Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73468}

Bug: v8:11510
Change-Id: Id35bc4ebcb45a617f61993d857ad2291b0287ad6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2772600
Auto-Submit: Manos Koukoutos <manoskouk@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@{#73502}

This is a reland of 5f9f09f4

Original change's description:
> [sparkplug] Enable shorter builtin calls behind --short-builtin-calls
>
> ... on desktop x64 and arm64 if pointer compression is enabled.
>
> Bug: v8:11527
> Change-Id: Ie23b59312c6db34a5f40e23347b3c4f11173612d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767222
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73498}

Bug: v8:11527
Change-Id: I5b5524b6b4b301e4afcc09e4621942b77b56c07d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2772235Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73501}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/37b76d6..ff9d9de

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/b965b65..c730dae

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/36de4be..2737963

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/752611e..41f9e2d

Rolling v8/tools/luci-go: git_revision:19175e196dd495f6e092845f7d777cb5bf157b3e..git_revision:e81c0c9c528d0a416922e4ccd958d0de59a64816

Rolling v8/tools/luci-go: git_revision:19175e196dd495f6e092845f7d777cb5bf157b3e..git_revision:e81c0c9c528d0a416922e4ccd958d0de59a64816

Rolling v8/tools/luci-go: git_revision:19175e196dd495f6e092845f7d777cb5bf157b3e..git_revision:e81c0c9c528d0a416922e4ccd958d0de59a64816

TBR=v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I7a3f21d3d171596b6d98a843379bd1c146f2ae54
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2771598Reviewed-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@{#73500}

This reverts commit 5f9f09f4.

Reason for revert: Broke https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Clusterfuzz%20Linux64%20-%20release%20builder/21079/overview

Original change's description:
> [sparkplug] Enable shorter builtin calls behind --short-builtin-calls
>
> ... on desktop x64 and arm64 if pointer compression is enabled.
>
> Bug: v8:11527
> Change-Id: Ie23b59312c6db34a5f40e23347b3c4f11173612d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767222
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73498}

Bug: v8:11527
Change-Id: I48ec54a134a293e31d4d26ce3a82a27a714fde6a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2770599
Auto-Submit: Zhi An Ng <zhin@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@{#73499}

... on desktop x64 and arm64 if pointer compression is enabled.

Bug: v8:11527
Change-Id: Ie23b59312c6db34a5f40e23347b3c4f11173612d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767222
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73498}

Throwing an object that needs special property lookup currently traps
when we catch it in wasm. We should just return undefined to let the
caller know that this is not a wasm exception object.

Drive-by: use the named {caught_tag} register consistently.

R=clemensb@chromium.org

Bug: chromium:1188825
Change-Id: I8ebd4db756ac7ba04208ab43c7349c28b813fc49
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767519Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73497}

This brings the WasmModuleBuilder in the mjsunit test suite
up to date wrt. the latest changes of the GC proposal.

Bug: v8:7748
Change-Id: I4e1a3d34a1e83626ab89d2fa0e10ca4aa61d75ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2690590
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73496}

We currently canonicalize shuffles in the architecture specific
instruction selector. This has the drawback that if we want to pattern
match on nodes that have a shuffle as input, they need to individually
canonicalize the shuffle. There can also be a subtle bug if we
canonicalize the same shuffle node twice (see bug for details).

This moves the canonicalization to "construction time", in
wasm-compiler, when building the graph. As such, any pattern matches in
instruction-selector will only need to deal with canonicalized shuffles.

We introduce a new kind of parameter for shuffle nodes,
ShuffleParameter, to store the 16 bytes plus a bool indicating if this
is a swizzle. A swizzle essentially: inputs to the shuffle are the same
or all indices only touch 1 input. We calculate this when
canonicalizing, so store this bit of information inside of the node's
parameter.

We update the tests in x64 to handle special cases where, even though
the node's inputs are not swapped (due to canonicalization), they need
to be swapped for the specific instruction selected (e.g. palignr). The
test data also contains canonicalized shuffles, so we have to manually
canonicalize them.

Bug: v8:11542
Change-Id: I4e78082267bd03d6caedf43d68d81ef3f5f364a8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2762420Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73495}

Refactor SpacePolicy on a non-templated class to avoid the situation
of having MakeGarbageCollectedTraitBase<T>::SpacePolicy<U> refer to
different T and U which make it hard for the compiler to alias
anything.

Bug: chromium:1056170
Change-Id: I78eb0362d43403ad2712bcb65746eeb9f6ad44fa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2769338Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73494}

Previously we needed to register the backing stores globally because
the embedder could create them from a raw pointer. This is no longer
possible after the removal of the old API.

The global backing store registry now keeps track only of wasm memory
backing stores.

Bug: v8:9380
Change-Id: Iffefbf14dcafc1f9ce0dc3613335c754c9cb649a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2763874Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73493}

Also added multiply low/high and vector merge instructions to
the simulator.

Change-Id: I889004b5572ee7df75be706c424ac2e83e53e8b3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2769058
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#73492}

Bug: chromium:1188868
Change-Id: If3916891806b7db7c4556f0dc50ae73afa06036c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2766223
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73491}

This tests the 'beforeScriptWithSourceMapExecution' mode of
setInstrumentationBreakpoint for wasm.

R=bmeurer@chromium.org

Bug: chromium:1151211
Change-Id: I3020ab3e67e090407e2641a105c513e7614aa305
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764342
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73490}

These tests require --validate-asm, which is available only on
WebAssembly enabled builds. This was causing problems
on https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20arm%20-%20sim%20-%20lite/15320/overview.

Moving them into regress/asm, the status file automatically skips these
tests if WebAssembly is not enabled.

Bug: v8:11238
Change-Id: Ib337fb6bd43319f61a33302efd4277c092935a9c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767600
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73489}

Bug: v8:11421
Change-Id: Ia4d3a20b9fdb5bc262cf480ece6e189aedff388f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2762143
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73488}

The machine graph verifier did not handle kUnalignedLoad and
kUnalignedStore yet, which caused problems with debug builds on arm.

R=mvstanton@chromium.org

Bug: v8:11384
Change-Id: I1a33c1e5993f9f0dd453a2d3f757e0eaff65b479
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2756213Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73487}

Sweeper cannot assume that platform never changes, so that we can
support using testing-specific platforms.
Instead, the sweeper gets the current platform from HeapBase on sweeping
start. The platform is set to nullptr whenever sweeping is not active.

Bug: chromium:1056170
Change-Id: I749e1dbfa204635fbb446a8c383aaa2548a717be
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767139Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73486}

- Fix link to older tool versions
- Adapt card style to versions page

NOTRY=true

Change-Id: Id857cc1220605d9bf62e1b810bd46c5766633383
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767228
Commit-Queue: Patrick Thier <pthier@chromium.org>
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73485}

Bug: v8:7748
Change-Id: If779c3c581317fb062c062a3ad60d1eebc1743d4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767142Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73484}

Change-Id: Ic4dff5209279f51ed75c76f2a0b159c727fb6164
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767198Reviewed-by: Junliang Yan <junyan@redhat.com>
Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73483}

Bug: v8:11577
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: Ie83cb991bdd9f6dc680824fa313fafa198ad9ce7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767599
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73482}

The bulk-memory proposal and the reference types proposal have been
merged into the main repository, so we don't have to run the proposal
tests anymore.

R=ecmziegler@chromium.org

Change-Id: I14583b8c1c387075442a402458ce04e7c6071f89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2752165
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Emanuel Ziegler <ecmziegler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73481}

If the block is unreachable, the interface is not called and the
{try_info} field is not set. Therefore, check it before accessing it.

R=clemensb@chromium.org

Bug: chromium:1188975
Change-Id: Ic6d7d2b7e26b0448143076e25a89c036216e8618
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767017Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73480}

This completes support for encoding/decoding exception values of any
type, and with that completes exception handling support in Liftoff.

R=clemensb@chromium.org

Bug: v8:11453
Change-Id: Ie70b16478061cb68f3165b96c3806503f9908b6b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767141
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73479}

R=clemensb@chromium.org

Bug: v8:11453
Change-Id: I0d02162e1a6974b550ec23ebb93c2478112a704d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767023
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73478}

The text representation of that opcode is "memory.grow", so the macro
should also be called WASM_MEMORY_GROW. This is also consistent with
WASM_MEMORY_SIZE.

R=thibaudm@chromium.org

Change-Id: Ibda328e52418d04392856820d3099f2dadaaf98f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764466Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73477}

This is a speed-for-memory tradeoff, which can be achieved by
re-mapping the builtins code blob into existing code range.

This CL handles cases where both embedded and un-embedded off-heap
builtins' PCs might appear on the call stack.

The v8_enable_short_builtin_calls build flag is still disabled.

Bug: v8:11527, v8:11421
Change-Id: Ie3db6eb8e264854df42b936a97d3e73d01de5dfd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2749636
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73476}

R=clemensb@chromium.org

Bug: v8:11453
Change-Id: I3aada28f3cb9839b2d5fc7e85f5fe87018d17d1b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767022
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73475}

One of the x86 ISA extensions is confusingly named SSSE3 (*Supplemental*
Streaming SIMD Extensions 3). SSSE3 supersedes SSE3, and is superseded
by SSE4.

This CL adds testing coverage for x86 CPUs that support SSE3
instructions, but do not support SSSE3 instructions. Chrome supports
these CPUs, and they are used by a non-trivial amount of Chrome's users
on Windows. This CL aims to cover all the spots missed by
https://crrev.com/c/2757893.

Change-Id: I83fc963b977b285898ffe12304443ad67db68d1f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764820
Auto-Submit: Victor Costan <pwnall@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73474}

This will enable more optimizations in later compilation stages.

Bug: v8:11510
Change-Id: Ia4125f564014432a356c7889c862f6cd767f9db5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764756
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73473}

R=clemensb@chromium.org

Bug: v8:11453
Change-Id: Ia8521b1707b083e3e674801481081bfc16a8b5c8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764757
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73472}

This is a reland of d76064df

Original change's description:
> cppgc: Rework GC info creation
>
> Previously, GCInfoTrait relied on the non-trivial constructor of a
> static object for registering a new GCInfo object. The generated code
> is required to be thread-safe which is achieved by introducing guard
> variables in the compiler.
>
> The new version is similar to Blink in that it relies on zero
> initialization of a trivially constructible atomic.
>
> Compared to guard variables that are created per GCInfo registration,
> the atomic creates less bloat (~20bytes/type) and also results in a
> better fast path.
>
> Minimum example: https://godbolt.org/z/qrdTf8
>
> Bug: chromium:1056170
> Change-Id: I95efbbf035b655d0440c9477f5391e310e2b71fa
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764750
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73463}

Bug: chromium:1056170
Change-Id: I01e60beabc1d279d352361657f408f113aac768e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767021
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73471}

We have it readily available at all call-sites. There is no need to
request it via GetIsolate on the function itself.

Change-Id: I4936177c47c8adf9dfeafe1e320f8411ae358a5b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2761200Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73470}

When dropping the exception from the stack, we have to
take locals into account when computing the right stack
slot.

Fixed: chromium:1187836
Change-Id: I76acb1e4dc50992524123cc369dea8e51242164c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764749
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73469}

Bug: v8:11510
Change-Id: I1e8fcb54444e494c7d765ad556d09d954441361f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2752876
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73468}

... introduced in https://chromium-review.googlesource.com/c/v8/v8/+/2727502

Bug: v8:11527, v8:11421
Change-Id: I97d8711ad946789f8a39de5fcca41e77f20cde79
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767019Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73467}

This reverts commit d76064df.

Reason for revert: Breaking MSAN - https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/37390/overview

Original change's description:
> cppgc: Rework GC info creation
>
> Previously, GCInfoTrait relied on the non-trivial constructor of a
> static object for registering a new GCInfo object. The generated code
> is required to be thread-safe which is achieved by introducing guard
> variables in the compiler.
>
> The new version is similar to Blink in that it relies on zero
> initialization of a trivially constructible atomic.
>
> Compared to guard variables that are created per GCInfo registration,
> the atomic creates less bloat (~20bytes/type) and also results in a
> better fast path.
>
> Minimum example: https://godbolt.org/z/qrdTf8
>
> Bug: chromium:1056170
> Change-Id: I95efbbf035b655d0440c9477f5391e310e2b71fa
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764750
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73463}

Bug: chromium:1056170
Change-Id: I71960103513d6db7789d752b70727d014c2e6406
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2767020
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@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@{#73466}