.. and replace them by elements read directly from the heap object.

With this change, consistency between `map` and `elements` is
no longer guaranteed. Users were updated, when necessary, to deal
with this, e.g. by being more careful not to read out of bounds,
by inserting new `actual_elements == elements_constant` runtime
checks, or through a new compilation dependency that verifies
unchanged elements at finalization time.

Drive-by: inline GetElementsKind into callsites.

Bug: v8:7790
Change-Id: Ifba78182e185ff0d4e954e3be52f0eb24328c853
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2909655Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74977}

Change-Id: I244a28e29f14b05a50c8bb10db429b16b2052aca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944432Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74976}

We currently take the sample at the moment the isolate is created. At
that point, the embedder callback for taking samples is not installed
yet. Hence delay taking the sample until the first module is created.
This will only take samples for isolates that actually use wasm, which
will reduce the overall number of samples, but will give a better
picture of PKU support for Wasm.

R=jkummerow@chromium.org
CC=dlehmann@google.com

Bug: v8:11714
Change-Id: I8a4163961c06076efd6c5dde5751682b53863c2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944429Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74975}

This reverts commit 79d63a5e.

Reason for revert: Breaks predictable: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20predictable/36887/overview

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: I20eaf665e8ce63af8aeffe3bac7a45372ad6ab7b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2944434
Auto-Submit: Clemens Backes <clemensb@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@{#74974}

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}

Change-Id: Id502aa02a778d17c32996b0438ac3a7c85166430
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940892Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74972}

Introduce EmitTSANStoreOOLIfNeeded methods which make it easier on the
eyes in code-generator.cc.

Also pass along the size, which lays the groundwork for the other
instructions e.g. kX64Movq since we don't require the store to be a
Tagged one. This creates new builtins (since we now have a version with
32 bits and another one for 64 bits stores). We can extract the common
code in builtins-internal-gen.cc to de-duplicate the common code.

Bug: v8:7790, v8:11600
Change-Id: I81d80b852ec96b94d170a20f6d61621743b74b32
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2933664Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74971}

This is a reland of 5fd38582. It adds
back all recursive implications (via --single-threaded), such that we
can remove them individually in follow-up CLs and watch the state of
the predictable bot.

Original change's description:
> [flags] Predictable should not imply single-threaded
>
> The --predictable flag is often used to reproduce issues, and having it
> imply --single-threaded can change decisions like which compiler(s) to
> use. This is because --single-threaded is meant to be set by embedders
> (hence we do our best to support single-threaded execution), whereas
> --predictable is a testing-only flag which should not change semantics
> too much. The fact that --predictable executes everything in a single
> thread is already implied by the PredictablePlatform.
>
> R=ahaas@chromium.org, machenbach@chromium.org
> CC=​jkummerow@chromium.org
>
> Change-Id: Ic174dd59dfdbd6aa1a410f983db05db26c944cd5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2919828
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74822}

Change-Id: I7a060826761781727870dd96fffc42ced4675e76
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2933143
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74970}

This is a reland of 81dd3f42,
which was a reland of 59eff3bf

Original change's description:
> [bigint] Karatsuba multiplication
>
> The Karatsuba algorithm is used for BigInts with 34 or more internal
> digits, and thanks to better asymptotic complexity provides greater
> speedups the bigger the inputs.
>
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2782283
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74916}

Bug: v8:11515
Change-Id: I08f7d59dfa39fb3b532684685afd9fa750e0e84e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2933666Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74969}

Bug: v8:11525
Change-Id: I0ac9f252e0de16480036e3630edf7efefe8d8571
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2928501Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74968}

Bug: chromium:1213927
Change-Id: I85f5559863524717355ec61694ce007a2be7c8a5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2931799Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74967}

Since there is only a single thread in predictable mode, we should never
wait for more work. That would be an immediate deadlock.
This CL adds code to never wait, and instead checks after processing all
messages that we would not need to wait (i.e. that all work was
completed). This turns deadlocks into FATAL errors.

R=ahaas@chromium.org

Bug: v8:11848
Change-Id: If61305d634803fc43678238dc6e9d3a2f35793c8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940886Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74966}

Strict equality checking of ValueTypes only made sense before
reference types came along.

Change-Id: I632f541328cb27ae87a5e3daccd4ffb9cfc8a502
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2928513
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/master@{#74965}

Bug: chromium:1213097
Change-Id: If768725a5645b7d21f59845692ca5491e8674bfa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940896Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74964}

Prepare method by taking an object as argument. In the future we can
optimize this method by only sweeping the object's page.

Bug: v8:11837
Change-Id: Ife1ee7949bfaf590dcc305cc4d03aa1813c07b76
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940888Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74963}

This fixes a little mistake from https://crrev.com/c/2182453. In
predictable mode (where we do not have any threads for executing
background work) we are executing everything on the main thread, but we
should never wait for background work to be spawned. Otherwise we can
deadlock if the last background task spawned new foreground work, but we
keep waiting for more background work to arrive.

Generally, any blocking in predictable mode will block forever, because
there is no one to spawn any work concurrently (foreground or
background). But the blocking for foreground work has to be there for
non-predictable mode, thus keep it for now, and only remove waiting for
background work.

R=ahaas@chromium.org

Bug: v8:11848
Change-Id: I51c976f6858db8120baa4c47d28840a1041d7fea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940885Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74962}

This reverts commit d1e1f1be.

Reason for revert: Main bug was fixed.

Original change's description:
> [infra] Switch back to Xenial on a slow variant
>
> This is to mitigate flaky timeouts due to memory problems on some
> Bionic bots.
>
> Bug: v8:11818
> Change-Id: I4758f0f167b94d81f43e183a5599a39d8545b4e1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2922245
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Maya Lekova <mslekova@chromium.org>
> Auto-Submit: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Maya Lekova <mslekova@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74824}

Bug: v8:11818
Change-Id: I9719cbcd074de44cd5fb981c40f46bf4e10adee0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2940895
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74961}

This aids debugging as it gives the root set a name.

Bug: chromium:1164553, chromium:1186901
Change-Id: I2c2aed369823b059629b35bb170b4966b47156d0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2933661
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74960}

The tests are not compatible with the --stress-background-compile flag.

Bug: v8:11821
Change-Id: Iecef6a2838109fddc9f0ecc145a9f8971bc9bc3c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2918214Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Paolo Severini <paolosev@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#74959}

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/092e09c..8bf7a0b

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

Change-Id: Ib98bf84acfa7c1c13305dcf2dfcb9a32bf1a66a0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2942625Reviewed-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@{#74958}

This is a reland of b0c70710

The first CL got reverted because of build errors. This CL replaces the
remaining usage of is_local_space() with is_compaction_space().
Supposedly this was a leftover because https://crrev.com/c/2928189
landed at roughly the same time.

Original change's description:
> [heap] Remove unused LocalSpace class
>
> LocalSpace was introduced for off-heap spaces with concurrent bytecode
> compilation finalization. However, finalization ended up using
> LocalHeap for concurrent allocations. LocalSpace is therefore unused
> and can be removed.
>
> This CL removes LocalSpace and renames all mentions of local space to
> compaction space. Compaction space was the only local space left.
>
> Change-Id: I12a8a2724f777a77ddb9957fe2d8e89febfebbaf
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2930169
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#74914}

Change-Id: I993c47fe85f4140f5d6137afde2653a48047cafb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939983Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74957}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/74cfeda..e353b02

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

Change-Id: I2488e4e16cf75067122d61652303d6fad2b5cd25
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2942922Reviewed-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@{#74956}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/1da98aa..74cfeda

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/712eb08..092e09c

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/9705687..a5b6b2f

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/af7a363..30cbc5c

Rolling v8/tools/luci-go: git_revision:c9957ed0ce0fd363aac127056344eba1b873bad0..git_revision:2cc9805d5ad186367461ef1c4f0c59098b450418

Rolling v8/tools/luci-go: git_revision:c9957ed0ce0fd363aac127056344eba1b873bad0..git_revision:2cc9805d5ad186367461ef1c4f0c59098b450418

Rolling v8/tools/luci-go: git_revision:c9957ed0ce0fd363aac127056344eba1b873bad0..git_revision:2cc9805d5ad186367461ef1c4f0c59098b450418

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

Change-Id: I202053812c034c82bfd70aa9821685eb981d6335
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939053Reviewed-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@{#74955}

ReadLittleEndianValue needs to be used to make sure
value is returned correctly on BE machines.

Change-Id: I02a64cded4f5dcccd39f1109c4179bebf9231a70
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2941038Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74954}

Replacing existing values leads to type errors and printing wrong pcs in
errors.

Change-Id: I513eae0a7e0cb5764d307eb172a378d328ca3660
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2936596Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74953}

The two instructions are fused into a single Sadalp instruction,
improving performance of quantized neural network operator
implementations such as XNNPACK.

This change also includes some formatting changes to the unit
tests that were made automatically by clang-format, which I am
happy to revert if preferred.

Bug: v8:11546
Change-Id: I2afc8940a52186617cffd276c82733ad3020b728
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2878742
Commit-Queue: Daan de Graaf <daagra@google.com>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74952}

ReadLittleEndianValue needs to be used to assure ptrs
are dereferenced correctly on BE machines.

Change-Id: I420f863de1b98d5d68688614ead4847258779c9c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2941022Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74951}

Change-Id: Icfef3e722d8d01f023677090dca6b899c51a46e8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2931580Reviewed-by: Brice Dobry <brice.dobry@futurewei.com>
Commit-Queue: Brice Dobry <brice.dobry@futurewei.com>
Cr-Commit-Position: refs/heads/master@{#74950}

So far, initializer-expression evaluation was tied to setting global
values. We now need it to operate independently of globals, so that we
can implement new constant expressions like struct.new, which need their
arguments to be computed before they can be initialized.

Changes:
- Move type computation of WasmInitExpr into WasmInitExpr::type.
- Fix WasmInitExpr::type kRttSub case for rtts without depth.
- Introduce InstanceBuilder::EvaluateInitExpression().
- Rename InstanceBuilder::GetRawGlobalPointer() ->
  GetRawUntaggedGlobalPointer().
- Simplify InstanceBuilder::InitGlobals using EvaluateInitExpression().
- Introduce ValueType::is_numeric.
- Add Simd128(byte*) constructor.
- Introduce WasmValue::CopyTo() for numeric types.

Change-Id: Ic502b611f3998187abd9fc6ec377c2954c27abdc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939982
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74949}

Changes:
- Merge all immediates which read a u32_v index into IndexImmediate.
  Refactor overloaded Validate(const byte*, [Type]Immediate) functions
  to Validate[Type](const byte*, IndexImmediate).
- Move MemoryIndexImmediate/MemoryAccessImmediate validation into their
  own Validate functions. Remove CheckHasMemory(), move its
  functionality into these Validate() functions.
- Refactor MemoryInitImmediate, TableInitImmediate and
  CallIndirectImmediate as composite immediates.
- Change field initializations for some Immediates to constructor
  initializers. This helps us drop some useless default constructors.
- Use the correct pc in StackEffect for struct.new_default.

Bug: v8:11831
Change-Id: I878f69a33f8473dc275184995b3b7b88fe0dfc8a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2928498Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74948}

R=thibaudm@chromium.org

Change-Id: I6fcd78ffb2683ed92e056d67ec4ef792c0d2ec0b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939986Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74947}

This CL introduces an ExplicitRealmScope in d8 for entering an existing
Realm on demand.

Bug: v8:11525, v8:11706
Change-Id: I3b556aed85fc615bb5efbd4a072e075534617258
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2936602
Commit-Queue: Vicky Kontoura <vkont@google.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74946}

Tbr: nicohartmann@chromium.org
Bug: chromium:1198705, chromium:1199345, chromium:1200490
Change-Id: I4a486df636e084279423e6cd3b867137bfe3fd6f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939984Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74945}

The V8 roll is stuck due to a compile error:
https://chromium-review.googlesource.com/c/chromium/src/+/2933917

This CL adds the defined() to a preprocessor guard to make it
compile

Change-Id: I744c6b9c3b92380a80fd50393e86f48392042b9a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939985
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74944}

Change-Id: I9a3c43418b17447741b5886d4706ccd1db9b38e6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2933662
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74943}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/20ee3d5..1da98aa

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/cd7b8c0..eb65cc3

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/ec690bb..712eb08

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/c8f63d3..9705687

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/f022e29..a0718d4

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/19eadef..af7a363

Rolling v8/tools/luci-go: git_revision:3e796d36914b6ddf5311374284e3ffa06c24fc7e..git_revision:c9957ed0ce0fd363aac127056344eba1b873bad0

Rolling v8/tools/luci-go: git_revision:3e796d36914b6ddf5311374284e3ffa06c24fc7e..git_revision:c9957ed0ce0fd363aac127056344eba1b873bad0

Rolling v8/tools/luci-go: git_revision:3e796d36914b6ddf5311374284e3ffa06c24fc7e..git_revision:c9957ed0ce0fd363aac127056344eba1b873bad0

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

Change-Id: I09959737175560509e13ec3060dd0b6dc5feb108
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2939065Reviewed-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@{#74942}

Change-Id: Ie16a4542179a9661991a4e1696d1b7a952b0e305
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2936605Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74941}

Change-Id: I57e46d779e8336b4a456b2a0932a0a6126fcb873
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2937256
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@{#74940}

vcgd/vcdg with 32-bit FP inputs are only supported
on z15 and above. For older machines we need to use scalar
instructions.

This is a partial revert of this CL: https://crrev.com/c/2697389

Change-Id: I61deb9357efd424c3b94dddc8be37e7e4c42d334
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2936640Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74939}

Port 97def807

Change-Id: If4f135be03e7ab719e091f02bdace49f9bcafcfa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2928143
Commit-Queue: Brice Dobry <brice.dobry@futurewei.com>
Reviewed-by: Brice Dobry <brice.dobry@futurewei.com>
Cr-Commit-Position: refs/heads/master@{#74938}