Maglev uses a different safepoint table. This CL introduces the
functions FindReturnPCForTrampoline for MaglevFrame and TurboFanFrame.

Bug: v8:7700, chromium:1356902
Change-Id: I90784ddfdc96604c5ada8047e6f7447c17e6c3aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3859342
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82742}

Bug: v8:9407
Change-Id: I29f8f5ec68f09e8631b59d3a6a2926bab3b3bcd3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3845638Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Qifan Pan <panq@google.com>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82741}

Port commit 1e5c03c7

Bug: v8:11880
Change-Id: I706056509c2d23e6d57203aba7adcbcbe22607cf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3859164Reviewed-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@{#82740}

This allows x64 to select shrl instead of shrq instruction for the
below pattern:

  2: ChangeUint32ToUint64(1)
  3: Int64Constant[2]
  4: Word64Shr(2, 3)

Change-Id: I3278b9ab52dd7212d1a616291d114a6bff0d13d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857740Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Hao A Xu <hao.a.xu@intel.com>
Cr-Commit-Position: refs/heads/main@{#82739}

This CL fixes a data race that was found using TSAN.

Bug: v8:13012
Change-Id: Ic29620edce116effea097a9f1d58532ba93b2224
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857424Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Leon Bettscheider <bettscheider@google.com>
Cr-Commit-Position: refs/heads/main@{#82738}

This is a reland of commit 59d7cf52

Original change's description:
> [riscv] Port [heap] Add shared barrier to RecordWrite builtin
>
> Bug: v8:11708
>
> Change-Id: I803b5499f1bbc3f7b4e626628a73f98239df8454
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854435
> Auto-Submit: 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@{#82710}

Bug: v8:11708
Change-Id: I56fcfc8a92c71463bce22a8090e161173cc2c64c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857980
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#82737}

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/31c77cb..bbdc7d8

Add microsecond and nanosecond unit (Frank Tang)
https://chromium.googlesource.com/chromium/deps/icu/+/bbdc7d8

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

Change-Id: I2d996e16a0e3e52c1de237eb13ca656829ff3d0c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857874
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@{#82736}

This reverts commit 59d7cf52.

Reason for revert: wrong port

Original change's description:
> [riscv] Port [heap] Add shared barrier to RecordWrite builtin
>
> Bug: v8:11708
>
> Change-Id: I803b5499f1bbc3f7b4e626628a73f98239df8454
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854435
> Auto-Submit: 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@{#82710}

Bug: v8:11708
Change-Id: I0e091b2eb086c87e7c60b9840d19b7c383124e42
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857979
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Yahan Lu <yahan@iscas.ac.cn>
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#82735}

Port 1e5c03c7

Original Commit Message:

    This CL simplifies the API calls by removing some instructions from
    the most common path.

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

Change-Id: I989c7da21347dc8a081b55ecea6374d3415d4aa3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857444Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82734}

Also add AO: ToISOWeekOfYear

Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.weekofyear
https://tc39.es/proposal-temporal/#sec-temporal-toisoweekofyear

Note- this is only the non-intl version. intl version in
https://tc39.es/proposal-temporal/#sup-temporal.calendar.prototype.weekofyear
will be implemented in later cl.

PR https://github.com/tc39/proposal-temporal/pull/2378

Sync spec text for ToISODayOfYear and ToISODayOfWeek
in the comment and add DCHECK for assertion.


Bug: v8:11544
Change-Id: If07ff76551707d17d125e41bc624c12da6efa45a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3531567
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82733}

This reverts commit a31e8f24.

Reason for revert: Causes DCHECK failures with --stress-snapshot

Original change's description:
> [sandbox] Forbid double-initialization of ExternalPointerSlots
>
> Double initialization may cause the ExternalPointerTable compaction
> algorithm to behave non-optimally: Consider the case of an Entry E1 that
> is owned by a HeapObject O and is marked for evacuation during GC
> marking. In that case, a new entry E2 is allocated for it, and during
> sweeping, E1 will be evacuated into E2 and the Handle in O updated to
> point to E2. However, if a new entry E3 for O is allocated before
> sweeping, then during sweeping E3 (instead of E1) will be moved into E2.
> This may then violate the invariant that the compaction algorithms
> always evacuates an entry out of the evacuation area.
>
> This CL therefore forbids double initializaiton of external pointer
> slots and adds DCHECKs to attempt to catch these in debug builds.
>
> Bug: v8:10391
> Change-Id: I128dc930e8b3f863dab18ba648f34d68d8cb276b
> 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/+/3856563
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Commit-Queue: Samuel Groß <saelo@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82729}

Bug: v8:10391
Change-Id: I37e6728cc16fe79fa7d743417dc9938d58fb0474
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857422
Commit-Queue: Samuel Groß <saelo@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#82732}

Bug: v8:7327
Change-Id: Ie10dd2b7fde80f100589b388644143e626b7e610
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3856570Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Danylo Boiko <danielboyko02@gmail.com>
Cr-Commit-Position: refs/heads/main@{#82731}

- Move StringForwardingTable implementation to own compilation unit.
- Refactoring preparing for layout change (Introduce explicit record
  class to make transition from contiguous Tagged_t fields to a
  heterogeneous record layout easier).
- Replace RootVisitor pattern for transitioning/cleanup during GC with
  callback.
- Minor cleanups.

Bug: v8:12957
Change-Id: Iae343393f470130eac0c54148a1303b67fb95aa4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3845635Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82730}

Double initialization may cause the ExternalPointerTable compaction
algorithm to behave non-optimally: Consider the case of an Entry E1 that
is owned by a HeapObject O and is marked for evacuation during GC
marking. In that case, a new entry E2 is allocated for it, and during
sweeping, E1 will be evacuated into E2 and the Handle in O updated to
point to E2. However, if a new entry E3 for O is allocated before
sweeping, then during sweeping E3 (instead of E1) will be moved into E2.
This may then violate the invariant that the compaction algorithms
always evacuates an entry out of the evacuation area.

This CL therefore forbids double initializaiton of external pointer
slots and adds DCHECKs to attempt to catch these in debug builds.

Bug: v8:10391
Change-Id: I128dc930e8b3f863dab18ba648f34d68d8cb276b
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/+/3856563Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82729}

Bugs that are older than the switch of v8_foozzie.py to Python3
bisect to the switch commit unfortunately. This change attempts to
let bisect run longer if a python2 executable still exists.

No-Try: true
Bug: chromium:1355824
Change-Id: I457a50af21704ddd2985793861eee8be5601a673
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3856574Reviewed-by: Liviu Rau <liviurau@google.com>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82728}

ThinStrings are not transitioned to other string representations, so we
shouldn't need the snapshotting protocol for them.

Change-Id: I17cee1a4171b10c441a005ac29bd232a0a065207
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3852489Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82727}

This does not enable exception handlers yet, we still bail out in
MaglevCompiler::Compile if we have an exception handler table in
the bytecode array.

This CL:
- Generates code for exception handler blocks (which previously were
set as dead code)
- Creates a machinery for nodes to set the property CanThrow
- Reads the exception handler table from the bytecode array and
identifies if we're emitting nodes inside a try-block and for which
handler we should jump in case of an exception
- Generates an exception handler table for Maglev code


Change-Id: Ifc9d4cb7440d3222f4fda48a86e4e482340b3b15
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854061
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82726}

Bug: v8:12781
Change-Id: I281047a0606b8f709a930998ef7e7a53f780f59d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3840146Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Feng Yu <f3n67u@gmail.com>
Cr-Commit-Position: refs/heads/main@{#82725}

This is a reland of commit 437b311a

Original change's description:
> [test] Migrate cctest/test-inspector to unittests/
>
> test-inspector.cc -> inspector-unittest.cc
>
> Bug: v8:12781
> Change-Id: I37d2bc2d023ffd91b94d5a09cdbfe4a6e22fecf1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3813062
> Reviewed-by: Jakob Linke <jgruber@chromium.org>
> Commit-Queue: Jakob Linke <jgruber@chromium.org>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82512}

Bug: v8:12781
Change-Id: Iece26e724f21d459dd1e96423d3aa72f15c5424e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3837705
Commit-Queue: Feng Yu <f3n67u@gmail.com>
Reviewed-by: Jakob Linke <jgruber@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82724}

Bug: v8:7700
Change-Id: I1cc74a53cde8594b3f0b116c7876e0d70139084c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3856583Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82723}

--stress-opt never did what we wanted it to; it ran its runs in
different contexts (therefore not able to share feedback across runs),
and even if it didn't, each run would create new closures for any
defined closures, so we'd still more than likely end up poly- or
mega-morphic.

Fuzzers cover this use case better than --stress-opt ever did, so now
it's just using precious bot time. We can get rid of it.

Bug: v8:10386
Change-Id: Ibbb9207d887b4b1dc4ec9093858d477c0f95eb37
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3803228
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82722}

This reverts commit c89998d9.

Reason for revert: a lot of unexpected memory regressions that
require investigation.

Original change's description:
> Reland "[ext-code-space] Enable Code-less embedded builtins"
>
> This is a reland of commit 40901824
> The Ubsan issue is fixed here: https://chromium-review.googlesource.com/c/v8/v8/+/3849038.
>
> Original change's description:
> > [ext-code-space] Enable Code-less embedded builtins
> >
> > Bug: v8:11880, v8:12592
> > Change-Id: I8d3d6ad0a4c26eb1fea2a998ffeddd1d96afa690
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3784593
> > Commit-Queue: Igor Sheludko <ishell@chromium.org>
> > Reviewed-by: Jakob Linke <jgruber@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#82642}
>
> Bug: v8:11880, v8:12592
> Change-Id: I66373d6af30b060d1204b952d733e260228548df
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3846493
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Jakob Linke <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82683}

Bug: v8:11880, v8:12592, chromium:1356329
Change-Id: I07aaf714da8d7afc66cf4116f189dd5dde5b8818
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3856357Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#82721}

Bug: v8:13234
No-Try: true
Change-Id: I63a5402ce5e4419972e0d6728c7615a341398648
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855450Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Almothana Athamneh <almuthanna@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82720}

This is a reland of commit 3615ae69.

Original change's description:
> [test] Migrate cctest/test-global-handles to unittests/
>
> Bug: v8:12781
> Change-Id: If7681564f3e0c087e3347557a3f9169625b51607
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3817621
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82633}

Bug: v8:12781
Change-Id: I776ab176733722fd8853deaabec93e0d44274d9c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855979Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82719}

This CL simplifies the API calls by removing some instructions from
the most common path.

Bug: v8:11880
Change-Id: Id8a62c35af51947ad2c152e093346d03c8e2f508
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855039
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Reviewed-by: 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@{#82718}

This is a reland of commit d83346be

Original change's description:
> [test] Migrate cctest/test-weakmaps to unittests/
>
> Bug: v8:12781
> Change-Id: Ief6bd7ee0ff2876e19970b2fb6af4f3208ec7f4e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3815486
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82699}

Bug: v8:12781
Change-Id: I9f74c32b924433dea67f62e26a336ef7263282e7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3856096
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82717}

Bug: chromium:1355871
Change-Id: I7c465e7ce326c62cbc8ad92e2547eea78d23fe0b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3852443Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82716}

Change-Id: I99b4c5d9ea6183acf629f5f76ebb0f84c88e7b20
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855198
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82715}

Add static asserts that we only use specific types for flag values.
Also, document that string values are not be frozen yet, and add TODOs
to fix that.

R=cbruni@chromium.org

Bug: v8:12887
Change-Id: I7367108810f0c6463509f744c5cefd9392c469fb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3852487Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82714}

This reverts commit d83346be.

Reason for revert: Seems to be breaking TSAN bot (https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20TSAN%20-%20stress-incremental-marking/8867/overview)

Original change's description:
> [test] Migrate cctest/test-weakmaps to unittests/
>
> Bug: v8:12781
> Change-Id: Ief6bd7ee0ff2876e19970b2fb6af4f3208ec7f4e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3815486
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82699}

Bug: v8:12781
Change-Id: Ia20078e9f40d0e2257cf0b953ddd2e72594c4085
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855938
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#82713}

Port commit 805df68f

Bug: v8:11708
Change-Id: I1a6970d18f1991e4158edb41ec5b8e393fccba4c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855696
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@{#82712}

This reverts commit d84b4664.

Reason for revert: Fails "Mutable Constants" check on android-binary-size: https://ci.chromium.org/ui/p/chromium/builders/try/android-binary-size/1211670/overview

For details about this check, see https://chromium.googlesource.com/chromium/src/+/main/docs/speed/binary_size/android_binary_size_trybot.md#Mutable-Constants

Original change's description:
> [flags] Rename v8_flags to FLAGS
>
> Team members expressed concerns that "v8_flags" is easier to miss in the
> code than the previous "FLAG_" syntax. After a poll and discussions we
> decided to rename the struct to "FLAGS", so the new syntax for
> addressing flag values is "FLAGS.foo" instead of the previous
> "FLAG_foo".
>
> R=​cbruni@chromium.org
> CC=​jkummerow@chromium.org
>
> Bug: v8:12887
> Change-Id: I51af4aa7fd5a3b3c29310c0cb4c4ff42086ff012
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854508
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82701}

Bug: v8:12887
Change-Id: I75516a0be9bc475afa2bbaa96a05e8a9b5be9be7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855936
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82711}

Bug: v8:11708

Change-Id: I803b5499f1bbc3f7b4e626628a73f98239df8454
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854435
Auto-Submit: 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@{#82710}

Resident set size may be smaller than the recorded size in
StatsCollector due to discarded memory.

Change-Id: I7e052fc4412afc64dc1ed5be6ed7dc9271e6f9d2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855204
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82709}

This improved Turboshaft value numbering performance
significantly in local testing.

Change-Id: I8b8c8e3a67da9b83b57efc34c08ca693e84d9076
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3852486Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82708}

Change-Id: Ic462c0302b9dcb9cc269f99c091610235f2cce56
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3855037Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82707}

Computation of this constant should obviously use kMaximumReprSizeLog2.
It's unclear if this could have caused observable misbehavior.

Change-Id: Iafdcbeb77d582f5f4e4aad07581377b74bb776c6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854316Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82706}

When walking the stack and visiting compressed spill slots, maintain
their compressedness so that generated code can rely on spilled values
not magically changing.
Tested manually using the benchmark in the associated bug, as I'm not
sure how to create a fast, reliable regression test for this.

Fixed: v8:13216
Change-Id: Iebd1fb513975d9ee2567f7141f3ab18a04b0f4e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854507
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82705}

When we spill a register that we know contains only 32 interesting bits
and then reload it from the spill slot, it's enough to reload its lower
half. This may save a few bytes, and guards against accidental changes
to the upper half (e.g. via pointer decompression).

Bug: v8:13216
Change-Id: I1d950d6e33d8ae94cf385af4f3e1db028bf333c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854506Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82704}

Many tests have a long execution time already, and running them in
stress mode is unlikely to flush out bugs (spec tests are supposed to
check for spec-conform behaviour, and this is unlikely to change if run
multiple times).

R=jkummerow@chromium.org

Bug: v8:13195
Change-Id: I029102e31f1e2e240e02376fbd5cd40ff0acc07a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3852488Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82703}