Instruction selector is also modified to include a `relaxed`
boolean value to be used for future optimizations.

Change-Id: I1e314066655613846653cc0c3668167c4ef32648
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735106Reviewed-by: Junliang Yan <junyan@redhat.com>
Reviewed-by: Milad Farazmand <mfarazma@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#81511}

Port commit a0a78665

Bug: v8:7748
Change-Id: I23e559917a76a01a7afb78403648372149a13c54
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3743122Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Auto-Submit: Liu Yu <liuyu@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#81510}

This adds a new --experimental-value-unavailable flag, which is disabled
for now. When enabled the debugger reports values that are optimized out
by TurboFan and values of certain variables in Temporal Dead Zones (TDZ)
as unavailable. Internally we use a special `value_unavailable` accessor
info to represent these values, and on the debugger boundary we report
these properties with `value`, `get`, or `set`.

Doc: https://goo.gle/devtools-value-unavailable
Bug: chromium:1328681
Demo: devtools-dbg-stories.netlify.app/crbug-1328681-value-unavailable
Change-Id: Idb09a4a148335a950deae60f7c07caecc48826ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3627510
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81509}

Bug: v8:11544
No-Tree-Checks: true
Change-Id: I12b093da9f9f4f63bc67b1efaeefb735b8a6c5e4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3741001Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81508}

Also add AOs: FormatISOTimeZoneOffsetString, TemporalZonedDateTimeToString, ToShowTimeZoneNameOption, ToShowOffsetOption,

Update FormatTimeZoneOffsetString to use ToZeroPaddedDecimalString

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.tojson
https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.tolocalestring
https://tc39.es/proposal-temporal/#sec-temporal.zoneddatetime.prototype.tostring
https://tc39.es/proposal-temporal/#sec-temporal-formatisotimezoneoffsetstring
https://tc39.es/proposal-temporal/#sec-temporal-temporalzoneddatetimetostring
https://tc39.es/proposal-temporal/#sec-temporal-toshowtimezonenameoption
https://tc39.es/proposal-temporal/#sec-temporal-toshowoffsetoption

The intl version of toLocaleString is not implemented in this CL yet


Bug: v8:11544
Change-Id: Id7e4f72b63864857b0b3fa8dc8dfcba0b5949faa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3688848Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81507}

Bug: v8:11544
Change-Id: Iaf3d673c9746badadae082121402e723d3704189
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3719087Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81506}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/13924a1..9782ba0

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

Change-Id: I1de68cb1af793810c753c80da76aad8b9712f12e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3741373
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Rolling v8/buildtools/clang_format/script: https://chromium.googlesource.com/external/github.com/llvm/llvm-project/clang/tools/clang-format/+log/e435ad7..8b525d2

Rolling v8/buildtools/linux64: git_revision:29accf5ac2eadfc53e687081583b7bc1592a8839..git_revision:ecaaf4b9e58a312a1610a37999eeccf58f73e264

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/bd235b0..6f2de7b

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/9dec1b4..78c53d1

Rolling v8/third_party/fuchsia-sdk/sdk: version:8.20220630.1.1..version:8.20220701.2.1

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

Change-Id: Ie6e5e60de44904ba9582db966b285fb4c25ee2c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3741372
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https://github.com/tc39/proposal-temporal/pull/2248

Bug: v8:11544
Change-Id: I02612030f626adf2b163dca96c7602efe6adef4a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3712044Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81503}

Also add AOs: GetTemporalUnit, NegateTemporalRoundingMode,
MaximumTemporalDurationRoundingIncrement, GetDifferenceSettings,
DifferenceInstant, DifferenceTemporalInstant

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.since
https://tc39.es/proposal-temporal/#sec-temporal.instant.prototype.until
https://tc39.es/proposal-temporal/#sec-temporal-gettemporalunit
https://tc39.es/proposal-temporal/#sec-temporal-negatetemporalroundingmode
https://tc39.es/proposal-temporal/#sec-temporal-maximumtemporaldurationroundingincrement
https://tc39.es/proposal-temporal/#sec-temporal-getdifferencesettings
https://tc39.es/proposal-temporal/#sec-temporal-differenceinstant
https://tc39.es/proposal-temporal/#sec-temporal-differencetemporalinstant

Bug: v8:11544
Change-Id: Iabcc452304366132b03bb82529159c7553c610b3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3722456
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81502}

Add AOs: MoveRelativeZonedDateTime,  DaysUntil, MoveRelativeDate,
RoundDuration,

Also fix bugs in CalendarDateAdd, TemporalDurationToString, IsValidDuration

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.duration.prototype.tostring
https://tc39.es/proposal-temporal/#sec-temporal-moverelativezoneddatetime
https://tc39.es/proposal-temporal/#sec-temporal-daysuntil
https://tc39.es/proposal-temporal/#sec-temporal-moverelativedate
https://tc39.es/proposal-temporal/#sec-temporal-roundduration

Bug: v8:11544
Change-Id: I351cdb88a930f3f7b48f351549d390e5bd02d91e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3715381Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81501}

Bug: v8:12946
Change-Id: I2c17c3258123417d616e7fc8a1521e006b758e08
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3731149Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Ilya Rezvov <irezvov@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81500}

Make the normal CheckMaps non-calling, and add a new
CheckMapsWithMigration which still does the deferred call. Eventually
we'll want to also not mark this as calling, but keeping the two
separate is cleaner anyway.

Bug: v8:7700
Change-Id: Ideb2fcef147ab45d4a10bbdde9a85a55fbd56947
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3740725Reviewed-by: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81499}

The optimization was initially designed to support only the case where
the receiver is the holder, so make this explicit:

Cached properties were implemented before super property access and
Reflect.get, or at least around the same time, not realising it
conflicted. Cached properties are optimizations for known accessors
globalThis.window and globalThis.document. They store the result of
calling those accessors. The result of calling those accessors depends
on the receiver passed to the call, so we shouldn't simply read the
cached property off of the _holder_ of the accessor, but only do so if
the holder is the same as the receiver.

Bug: chromium:1305302
Change-Id: Iea6f4437e09d5a293798041adcb310469589d00f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738744Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81498}

Currently serialization of external pointers stored in EmbedderDataArray
is not supported but such a functionality was never needed before.

Bug: v8:13007, v8:12949
Change-Id: I56dc33592c1410ac9e234c60ef79db92a4e96a0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3740724
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81497}

This opcode is being removed in favor of pre-declared non-defaultable
locals (details are still TBD).

Bug: v8:9495
Change-Id: I96ac053a1b5a852310c5dc0bbaeab0cbf5384663
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738743
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81496}

Change-Id: I4fe880b8d0f3c6886b7bf2f0aa497068f4cfd9a5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735134
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81495}

Most often, the {ValueType::Ref} constructor was called with a
constant nullability. To make things more convenient, this CL renames
{Ref} to {RefMaybeNull}, and introduces {Ref} and {RefNull}
constructors with fixed nullability.

Bug: v8:7748
Change-Id: I664ff184ca936cc752e152c3c67546d79aa24390
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3732936Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81494}

MarkingWorklists and MinorMarkCompactCollector each had their own
definition of MarkingWorklist. Both definition are identical.
Drop MinorMarkCompactCollector's definition.

Bug: v8:12612
Change-Id: I890f263e4de702aa34f00626a3aaa3ffb29c1ff2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3740723
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81493}

Upon Scavenge, nodes may generally be reclaimed or updated. This logic
did not consider the fact that objects may be Smis and thus should be
ignored.

Bug: v8:1341111
Change-Id: I62f68e673377a895d3487ec9d372001342e77e8a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3740722Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81492}

This makes the internal V8 name consistent with the text-format name.

Bug: v8:7748
Change-Id: I44f7ac1eb5e634b4f829e596bf1f14caeb748d54
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726291Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81491}

TSAN may cause the sandbox to fail to obtain enough virtual address
space during initialization, thereby causing it to fall back to a
smaller backing reservation. This combined with the very inefficient
ArrayBufferAllocator that is used in standalone v8 builds when the
sandbox is enabled may cause some tests to run out-of-memory earlier
than they otherwise would. For now we just disable these tests on TSAN
builds, but should be able to re-enable them once we have a better
ArrayBufferAllocator on standalone v8 builds.

Bug: v8:13009, chromium:1340224
Change-Id: I93e46e05d47a8850788504c10a6498067400128a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738740Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81490}

Ctrl+X, Ctrl+V. No change in behavior.
This is a preparational step for templatizing the module decoder
for disassembler purposes.

Bug: v8:12917
Change-Id: I08a5d2e666cd16a207e9862b2691446c0473ddb0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738221
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81489}

This is no longer needed as all backing store allocations must now be
located inside the sandbox after sandboxed pointers were enabled by
default when the sandbox is enabled.

Bug: chromium:1218005
Change-Id: Id2d5feba878e1a6a5775ae3fef4012d0e7fe667a
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738742Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81488}

Port commit b9c4a849

Change-Id: Ibf19d2988cacc67b6293a5ff348b878b27ed79e5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3740491
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/main@{#81487}

Reland since ubsan failures were fixed.

Original change's description:
> Revert "cppgc: Enable pointer compression by default on Desktop"
>
> This reverts commit 4cf08c1a.
>
> Reason for revert: broke ubsan.
>
> Original change's description:
> > cppgc: Enable pointer compression by default on Desktop
> >
> > The CL enables pointer compression in Oilpan.
> >
> > For sherrifs: the CL may cause some slight perf regressions (likely
> > blink_perf.*), due to slightly higher cost of compression and
> > decomrpession.
> >
> > Speedometer2 is not expected to regress, as was checked locally. Such a
> > slight performance degradation is compensated by memory savings that are
> > expected to be around 10-20% of Oilpan committed size (~2.5-5% of Renderer
> > PMF).
> >
> > Bug: chromium:1325007
> > Change-Id: I2e31fc56250dbe6354a7614fa1f9e926260d842b
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3695565
> > Commit-Queue: Anton Bikineev <bikineev@chromium.org>
> > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#81442}
>
> Bug: chromium:1325007
> Change-Id: Iabc31ed683841ba0189dee9028da330dc03d7e09
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735168
> Auto-Submit: Anton Bikineev <bikineev@chromium.org>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Commit-Queue: Anton Bikineev <bikineev@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81443}

Bug: chromium:1325007
Change-Id: Ifc8ea0e73e99d9be622e27d3d4c79d0e35fd459c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735128
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
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Cr-Commit-Position: refs/heads/main@{#81486}

Change-Id: I2e217b5b403db9fb8504a9c81040d8fe893b37d3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3740486Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Commit-Queue: Yahan Lu <yahan@iscas.ac.cn>
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#81485}

Change-Id: Ia92047d3e23b4180172c9d53c0b0bca12a856a04
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3734812Reviewed-by: Hannes Payer <hpayer@chromium.org>
Auto-Submit: Lutz Vahl <vahl@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81484}

In this part: push, pop

Bug: v8:11111
Change-Id: I62ddc418acaec778270d69c9839e2236d3c8f1e4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738259
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81483}

Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/b7afda2..7280499

Remove redundant formatting tags (#1420) (Tom Cobley)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/7280499

R=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com,mlippautz@chromium.org

Change-Id: Ib19d28c3b9b95da06296802f44af8600fb25933b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738494Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81482}

This was already removed as part of the lazy api accessor work, but
was never cleaned up throughout v8.

Change-Id: I00621d0e0f33c58efaed0f6b55cd22f1f8803825
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735131Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81481}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/26f8da3..13924a1

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

Change-Id: I9693339bd2065370daec9bd36ff960ee47ad36a1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738491
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Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/322e254..bd235b0

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/a83ac93..9dec1b4

Rolling v8/third_party/fuchsia-sdk/sdk: version:8.20220629.1.1..version:8.20220630.1.1

Rolling v8/tools/luci-go: git_revision:5d9b6ecf87cdfb928e1112d2838d26bc7ede2b48..git_revision:be5d9aacf8987c0826223264f0427cd0b530b6a4

Rolling v8/tools/luci-go: git_revision:5d9b6ecf87cdfb928e1112d2838d26bc7ede2b48..git_revision:be5d9aacf8987c0826223264f0427cd0b530b6a4

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

Change-Id: Iaeef3765f756fcea36fb10ba87a15a5a19da1025
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738490
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Bug: chromium:1339276
Change-Id: Ice60167660fa52e84c78bb0bd9d2a2c85e0c377a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3733027Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Ilya Rezvov <irezvov@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81478}

Bug: v8:12764
Change-Id: I5f915d1c4dad22f1ce12423f6149a85ad32d6725
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3733043
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81477}

Bug: chromium:1338980
Change-Id: Iae76931fb375ab792659c937d673dfe65e364360
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3739339
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81476}

The previous combination of a conditional and an unconditional move
produced an incorrect value when dst == rhs and lhs contained the
expected result.

Fixed: chromium:1338980
Change-Id: If3f722999ed9c0ffd687736280d048d232d75736
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3738219
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81475}

This is a performance improvement; no change in functional
behavior is intended.
AdaptiveMap is an abstraction over a std::map or a std::vector:
after being initialized iteratively with a set of entries, it
can switch to dense vector-based storage if that would be more
efficient.
The motivation is that we expect most name sections, if they
are present at all, to give fairly complete information, so the
dense mode will likely be the typical case. However, it's easy
enough to support sparse mode as well, and parsing the name
section into a std::map at first is particularly convenient for
cases where we can't guess the expected number of entries, such
as for function locals.

Change-Id: Ia17f27576a3061eb05c912f7081411d6f38137e6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3726150Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81474}

If the WordAnd aims to take low 8/16/32 bits of an oprand for later cmp8/cmp16/cmp32, it can be removed.

Change-Id: I0040e596ab65a6a9255ddbdb4fca573fd765879e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3731488
Commit-Queue: Jianxiao Lu <jianxiao.lu@intel.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81473}

This is a partial reland of https://crrev.com/c/3597106

With this change, an existing Script from the compilation cache can be
reused after its top-level SharedFunctionInfo was discarded, but only if
the new script is parsed on the main thread (not deserialized from code
cache data, and not parsed on a background thread).

Bug: v8:12808
Change-Id: I1edaee2095306a89e2c3b91f2fd01ac053f3c770
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3689348Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#81472}