This reverts commit e412e643.

Reason for revert: builder takes too long on CQ

Original change's description:
> Change linux_chromium_chromeos_msan_rel_ng to blocking on auto roll
>
> Bug: v8:12755
> Change-Id: I7c693c07640fd5952047666063f23b4be77692bd
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644954
> Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Auto-Submit: Almothana Athamneh <almuthanna@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80590}

Bug: v8:12755
Change-Id: I371c4ebbfc9dc9a0e806653c6c819b0eb29e5228
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644962
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Almothana Athamneh <almuthanna@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80610}

This is a follow-up CL to https://crrev.com/c/3623542.

When updating pointers during a full GC, a page might not be swept
already. In such cases there might be invalid objects in free memory.
Since these objects might be dead, their maps might have been reclaimed
already as well.

The previous CL cached the size of invalid objects in order to avoid
accessing an invalid object's map. However, as soon as a slot is within
an invalid object, we also need to check whether this slot is still a
tagged pointer which would require map access. This CL checks marking
bits on invalid objects to skip that check on such invalid objects.

Bug: v8:12578, chromium:1316289
Change-Id: Ie1d736f897a2994dbed7bfb95ed37732cd3b0882
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3596123Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80609}

Especially, this requires having the __proto__s of functions serialized.

Drive-by fix (gc stress): Handlify IterateBuiltinObjects.

Bug: v8:11525
Change-Id: I8dc50b9144d17134a7c9b8fdbabe23f5e44f197f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644613Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80608}

Rewrite CreateTemporalTimeZone to sync with
https://github.com/tc39/proposal-temporal/pull/2008



Bug: v8:11544
Change-Id: I75c75146a5a84fc51d4b5ed182641ebf697e8389
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3630351Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80607}

Also add the non-intl version of AO
GetIANATimeZoneOffsetNanoseconds which only implement for UTC.
(intl version implement other tz come later)

Also fix bug in JSTemporalTimeZone::offset_nanoseconds() that
"1000000L * offset_milliseconds()" may overflow int32_t before returning as int64_t by first casting offset_milliseconds() to int64_t in the operation so the whole formula is calculating under 64 bits not 32 bits. This bug fix some  *timezone-string-datetime tests.

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.timezone.prototype.getoffsetnanosecondsfor
https://tc39.es/proposal-temporal/#sec-temporal.timezone.prototype.getoffsetstringfor
https://tc39.es/proposal-temporal/#sec-temporal-getianatimezoneoffsetnanoseconds

Bug: v8:11544
Change-Id: I2227dbfc8d6ed3ef83edcef5a9b903b8642b5902
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3534622Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80606}

Bug: v8:12868
Change-Id: I42ef3e15b2a7fd2ef157aa0e657ddf98973e8d79
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644956Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andy Wingo <wingo@igalia.com>
Cr-Commit-Position: refs/heads/main@{#80605}

Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/aecbdbf..37be1e8

Add option to get the verbosity provided by commandline flag -v (#1330) (#1397) (Matthdonau)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/37be1e8

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

Change-Id: I0bb00e8310d4f7bf91fee25e52fdaa8cf1bccafd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652086
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80604}

Bug: v8:12868
Change-Id: I8d789457c725708e06f482d362d17c16a802a1f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644950Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andy Wingo <wingo@igalia.com>
Cr-Commit-Position: refs/heads/main@{#80603}

When call_ref has seen more than one call target, we now support
inlining all of them (constrained by budget/heuristics).

Bug: v8:7748,v8:12166
Change-Id: Iae16e74da1bad5e7a117f70efb6c61b3f39f832c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650607Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80602}

The forced allocation of fixed registers can override the arbitrary
choice of register in a previous allocation. Fix this by first
allocating fixed registers, and only afterward allocating arbitrary
registers.

Also add a DCHECK after input assignment that input locations match
their node's current location.

Bug: v8:7700
Change-Id: I262c2a1f9a3c47d5c23c84b3764569692f18f39d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644958
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80601}

Fix bug where AndNot(x, imm) and AndNot(imm, x) both become Bic(x, imm).

Bug: chromium:1318092
Change-Id: I0ca2c65a1e5d64da0347c86346e7c4dc04943eff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3613386Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: George Wort <george.wort@arm.com>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80600}

Bug: v8:7700
Change-Id: Idf127095758289308010312deb9eb2b234cc453d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652299Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80599}

Bug: v8:11525
Change-Id: I6db629c1ecd082162433787a0f5864acd201a91d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647840Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80598}

Change-Id: Ib5d2e24ee4a83547b9d403d5d8b5d75173b8310b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3648093Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Solomon Kinard <solomonkinard@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80597}

- Pass base::Vector instead of pointer plus size
- Remove always-true return value
- Remove unused SetCompiledModuleBytes in tests
- Drive-by: Use std::move for std::function callback

R=ahaas@chromium.org

Bug: v8:12425
Change-Id: I698abb64e4c8d8229997f09d6a79ef664fe9c933
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644952
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80596}

Bug: v8:12692
Change-Id: I41cc3b8f059d1c6dc28c6ddd14998c959b4d36ae
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652296
Auto-Submit: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80595}

... when external code space is enabled.

Bug: v8:11880, v8:12689
Change-Id: I0efa09a27d636df3d36d2da13ac26c7f2fedb94c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650744Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80594}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/1c34f36..5b615fa

Rolling v8/buildtools/third_party/libc++abi/trunk: https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxxabi/+log/ecff200..b682786

Rolling v8/buildtools/third_party/libunwind/trunk: https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libunwind/+log/3d54d41..44c86bb

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/d1ddc12..ecd2da3

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/31bfd51..8fb649c

Rolling v8/third_party/fuchsia-sdk/sdk: version:8.20220510.2.1..version:8.20220516.3.1

Rolling v8/third_party/jsoncpp/source: https://chromium.googlesource.com/external/github.com/open-source-parsers/jsoncpp/+log/9059f5c..42e892d

Rolling v8/third_party/zlib: https://chromium.googlesource.com/chromium/src/third_party/zlib/+log/9979c19..7085d03

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/9da9510..56af55b

Rolling v8/tools/luci-go: git_revision:2aa3d7e5e8662c5193059a490f07b7d91331933e..git_revision:d3db74920e35147955be43f62b5f4ed0cf84c614

Rolling v8/tools/luci-go: git_revision:2aa3d7e5e8662c5193059a490f07b7d91331933e..git_revision:d3db74920e35147955be43f62b5f4ed0cf84c614

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

Change-Id: I39db0aad04f28cc202fc7fa6bb31c2517b47f407
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3649375
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80593}

Split off a TurbofanFrame from OptimizedFrame, and make MaglevFrame a
subclass of OptimizedFrame. This allows it to be treated as an optimized
frame by code that is looking at deoptimization data.

Bug: v8:7700
Change-Id: Ia38e0f1c2cd73f054f63be81dff187d9197c1202
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644798
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80592}

Bug: chromium:1306416
Change-Id: Idebb83998a0d2e9e4034bc5d138d9f52a1215dc3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644955
Auto-Submit: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80591}

Bug: v8:12755
Change-Id: I7c693c07640fd5952047666063f23b4be77692bd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644954
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Almothana Athamneh <almuthanna@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80590}

NumFuzz passes various flags to V8 testing randomly, which can lead to
various flag contradictions with existing flags. Up to now the system
ignored the check for contradictions and kept running the test cases,
leading to false positives.

This change adds a new v8 flag --exit-on-contradictory-flags that
exists gracefully when a contradiction is detected. On the numfuzz
side we now filter simple contradictions beforehand.

Measurements showed that ~2% of all numfuzz tests ran into
contradictions. Around half of them are simple contradictions
(repetitions and inversions), which are now filtered beforehand.
The remaining ones (redundant or contradictory implications) are
now ignored.

Bug: v8:11826
Change-Id: I9942e203ba9668a097fabe1343dd1365c9da94c1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650746
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Almothana Athamneh <almuthanna@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80589}

This CL moves cctest/parsing/{test-parse-decision,
test-scanner-streams, test-scanner} to unittests/{
parse-decision-unittest, scanner-streams-unittest,
scanner-unittest}.

Bug: v8:12781
Change-Id: I2adfeaf2ccc796f17d6b7010c77b1f65c6ce593e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3612668
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80588}

Loading from/storing to the same field with incompatible mutabilities
is possible in unreachable code, specifically when a value is cast to
two different types with incompatible mutability for the same field
offset. Therefore, we allow this pattern in CsaLoadElimination.
When we detect it, we emit an Unreachable node to immediately crash the
program in case this unreachable code is somehow executed.

Bug: v8:7748, v8:12874
Change-Id: Ieb359d3e1b9f7bc4a91c556af2bba0507526d20e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644806
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80587}

This CL removes GCTracer::AssertMainThread and adds the more general
methods Heap::IsMainThread and Heap::IsSharedMainThread, to be used
in DCHECKs and elsewhere. It also introduces some const qualifiers.

Bug: v8:12425
Change-Id: Ibdec39ce77be704598ca0c8b440005dc27bd6997
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650600Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Nikolaos Papaspyrou <nikolaos@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80586}

Change-Id: I5144d8315b5c1aca751d138e4d87240b703dc9e3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650359
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Auto-Submit: Yu Liu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#80585}

Bug: v8:12868
Change-Id: I955155db468b2ecd86fa6c5a73c616b0e4c66446
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644949Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andy Wingo <wingo@igalia.com>
Cr-Commit-Position: refs/heads/main@{#80584}

Bug: v8:11111, chromium:1321013
Change-Id: Iec45b885e844ab02059470dd514f47133b0a6efe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650596Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80583}

Change-Id: I3d3b1f0b86714e0d654ed18c055d394002dbec2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650832
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80582}

This Cl moves cctest/libsampler/{test-sampler, test-signals-and-mutexes}
to unittests/libsampler/{sampler-unittest, signals-and-mutexes-unittest}.

Bug: v8:12781
Change-Id: I106e709a66d00d23df76c6868d0843dd0ac1887e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3612666
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80581}

Bug: v8:12868
Change-Id: Ib4540352c7db4b4bdbf88b559da44b08e71dd483
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650603Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Andy Wingo <wingo@igalia.com>
Cr-Commit-Position: refs/heads/main@{#80580}

... /objects/roots-unittest.

Bug: v8:12781
Change-Id: Id76a0e1ffaea18849866fa0f55c9a056dbdf6e2b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3612670
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80579}

Add lazy deopts for generic operations (binops, loads, stores).

Bug: v8:7700
Change-Id: I6f9abba5c57cd3d271552080927199e9dbd92322
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644799Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80578}

... api/accessor-unittest.cc.

- Add IsInt32, IsString, IsUndefined matcher in
testing/gmock-support.h.

Bug: v8:12781
Change-Id: I764491d7643e35fb8bc1621e857873aa24f64ccd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3593573Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80577}

This reverts commit 24286b8e.

Reason for revert: Re-staging the experimental flag for fuzzing

Original change's description:
> Revert "[rab/gsab] Temporarily stage --harmony-rab-gsab to enable fuzzing"
>
> This reverts commit b8f88be0.
>
> Reason: disabling an experimental feature in release branch
>
> Bug: v8:11111,v8:12870
> Change-Id: I6fbd6bdb318c0d25e69c04db208a0d5f2b9ebbd7
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647357
> Auto-Submit: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80520}

Bug: v8:11111,v8:12870
Change-Id: I0a45ed5ce53010196949dda23773d152aa605846
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647836
Commit-Queue: Marja Hölttä <marja@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80576}

With the flag --always-use-string-forwarding-table (only used for
testing), we can have young generation strings in the
StringForwardingTable.
We need to update references to these strings when they are evacuated
during mark compact (previously this was only done after scavenge).

Bug: v8:12877, v8:12007
Change-Id: Ie108add176f71dcdf296bd94bdffa664cb75ae02
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650719Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80575}

Port commit d2a8bdec

Bug: v8:12284
Change-Id: Ia011008d1e7695601fce78d60018e473079e9d0f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3650332
Auto-Submit: Yu Liu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#80574}

Port commit d2a8bdec
Bug: v8:12284

Change-Id: I8ec0c2270d85d8068823e241e1c326aa90caad8c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3651507
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Commit-Queue: Yahan Lu <yahan@iscas.ac.cn>
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#80573}

... ,test-fast-dtoa, test-fixed-dtoa} to unittests/base/
{bignum-dtoa-unittest, dtoa-unittest, fast-dtoa-unittest,
fixed-dtoa-unittest}.

This CL also moves cctest/{gay-fixed, gay-precision,
gay-shortest} to unittest/{gay-fixed, gay-precision,
gay-shortest}.

Bug: v8:12781
Change-Id: Id6072f92908ad3abfe683c69dac041227de2553f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3607114
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80572}

1) In copy/move ctors and operator=() we can just copy raw compressed
   value;
2) For null check we don't need to decompress the value;
3) Same for operator==().
4) Hashing can also be optimized in a followup.

Bug: chromium:1325007
Change-Id: Ic1bf2c5049802c078b3e0121dcbe62d9ecea83b3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3647359Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80571}