This is a reland of 32b685fa

There was an unrelated breakage. See https://crbug.com/v8/10655#c10

Original change's description:
> infra: Set gcc builders not to use Goma
>
> NOTRY=true
> NOTREECHECKS=true
>
> Bug: chromium:1100009
> Change-Id: I67deb383d41e6609d5c3215e02422c8b1c16f8f4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2272738
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68593}

TBR=liviurau@chromium.org
NOTREECHECKS=true

Bug: chromium:1100009
Change-Id: If59371bbe474383156effc6dfc92d848c304a416
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2276031Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68606}

Indicium is a new tool that integrates all our Map and IC processing
tools into one tool.

This CL does not attempt to cleanly integrate the Map Processor
and IC explorer, but provides an in initial starting point for further
integration work.

Bug: v8:10644
Change-Id: I753c116fd409c8c07613bf15f22e14aa1e8c8a0e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2259935
Commit-Queue: Sathya Gunasekaran  <gsathya@chromium.org>
Reviewed-by: Sathya Gunasekaran  <gsathya@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68605}

Bug: chromium:1098842
Change-Id: Id29edfda99f49a167a03b5158396a07559c75907
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270231Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68604}

It seems that the mix of atomic and non-atomic updates to the same
memory location is not working correctly. One fix is changing all memory
updates to be atomic. Another fix is removing the non-atomic access that
happens while the workers are already running (using atomic accesses).
This CL implements the latter.

R=ahaas@chromium.org

Bug: v8:10647, v8:10650
Change-Id: I84b4f3f442b6be3c4ea6e51962a523f443f5e43b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273133Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68603}

Change-Id: I04902e3f91dae6083b3de7630fd91d49ad805a2a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2272565
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68602}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/d83f4a5..3a5fbeb

Rolling v8/third_party/aemu-linux-x64: FN-ckx_oV2JTqPuW3iMG50qdN5FgGqm-4XP9AkoLwPUC..I_sHBnheTA3cmFAjzkyUAhsmhpWXu82YLidstkjgsvIC

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/8353ff9..de622ae

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/6e6c67d..d9391fd

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/2479626..6849229

TBR=machenbach@chromium.org,tmrts@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I9e7c14e44cf7dc89f4a410a498af0ee306d9f0f2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2274519Reviewed-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@{#68601}

On mips platform, call operations may be followed by trampolines, which
leading to wrong information of the call instr's location in safepoint.
This CL fix it by adding a last_call_pc_ to record the location.

Besides, this CL also fix a bind operation in CheckTrampolinePool, which
may try to use trampoline before it's emission.

Change-Id: Ic0cbdb93afffa60a7389ee8177c381087fcaf52e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2095645
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68600}

This reverts commit fa9c6e17.

Reason for revert: Didn't fix the build.

Original change's description:
> Revert "Add support for __declspec(nocf)."
>
> This reverts commit 0c58583b.
>
> Reason for revert: https://crbug.com/v8/10656 and failures in https://ci.chromium.org/p/v8/builders/ci/V8%20Win64%20-%20msvc/14135
>
> Original change's description:
> > Add support for __declspec(nocf).
> >
> > __declspec(nocf) syntax was added in https://reviews.llvm.org/D72167
> > and annotates that checks should not be added on indirect calls
> > within that function.
> >
> > BUG=chromium:584575
> >
> > Change-Id: Ib2e2d2a827186a9c1fd3de15356b2b04d6a69e49
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270707
> > Reviewed-by: Clemens Backes <clemensb@chromium.org>
> > Commit-Queue: Will Harris <wfh@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#68590}
>
> TBR=wfh@chromium.org,clemensb@chromium.org
>
> Change-Id: Icec64feb44715a65e905a93e0c47fb37d4f11a09
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: chromium:584575
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2274736
> Reviewed-by: Zhi An Ng <zhin@chromium.org>
> Commit-Queue: Zhi An Ng <zhin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68598}

TBR=wfh@chromium.org,clemensb@chromium.org,zhin@chromium.org

Bug: chromium:584575
Change-Id: I0e305374c8325d87e4b18963da4e90802f136187
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2274356
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68599}

This reverts commit 0c58583b.

Reason for revert: https://crbug.com/v8/10656 and failures in https://ci.chromium.org/p/v8/builders/ci/V8%20Win64%20-%20msvc/14135

Original change's description:
> Add support for __declspec(nocf).
> 
> __declspec(nocf) syntax was added in https://reviews.llvm.org/D72167
> and annotates that checks should not be added on indirect calls
> within that function.
> 
> BUG=chromium:584575
> 
> Change-Id: Ib2e2d2a827186a9c1fd3de15356b2b04d6a69e49
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270707
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Commit-Queue: Will Harris <wfh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68590}

TBR=wfh@chromium.org,clemensb@chromium.org

Change-Id: Icec64feb44715a65e905a93e0c47fb37d4f11a09
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:584575
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2274736Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68598}

Change-Id: Iaa0075ea16c289a369b354f2f44b3d1161f2faac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273581Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#68597}

TBR=santa
NOTREECHECKS=true

Change-Id: I629255ea3f65134bec8a1c7428b36426960aa311
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2274120
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68596}

This reverts commit 32b685fa.

Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20vtunejit/36094

Original change's description:
> infra: Set gcc builders not to use Goma
> 
> NOTRY=true
> NOTREECHECKS=true
> 
> Bug: chromium:1100009
> Change-Id: I67deb383d41e6609d5c3215e02422c8b1c16f8f4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2272738
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68593}

TBR=sque@chromium.org,machenbach@chromium.org

Change-Id: Ia43f1ed69859d8face0adeefc820a06bf2e04c82
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1100009
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2274086Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68595}

When filling stack slots, the start offset can be too large to fit into
the immediate of a str instruction (which is used to handle remainders
after stp). For example, a function with 32 i64 params will require 256
bytes reserved for the params, so the offset starts at 256 + 16
(instance) = 272. This does not fit into a int9, so we hit an
UNREACHABLE case when emitting str.

The fix here checks that start can fit in an unscaled immediate, and if
it doesn't fallback to the general case. We could use the Str
from macro-asesmbler, but that uses another instruction, so we are not
saving anything.

A check for IsImmLSUnscaled(-start-12) is sufficient because 12 is the
largest possible value for remainder. So if -start-12 fits, everything
else will fit.

Bug: v8:10645
Change-Id: I1c415499ada3a807d5f3889f091150bfefdf471d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2267369
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68594}

NOTRY=true
NOTREECHECKS=true

Bug: chromium:1100009
Change-Id: I67deb383d41e6609d5c3215e02422c8b1c16f8f4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2272738
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68593}

Prototype f64x2.trunc on ARM for both ARM v7 and ARM v8. ARM v8 has
support for vrintz, and for ARM v7 we fallback to runtime.

Since ARM v8 uses vrintz, which is the same instruction used for F64
trunc (scalar), wasm-compiler reuses the Float64RoundTruncate check.

Bug: v8:10553
Change-Id: I074d5b4172809915d4b37c59bd3b0dcbf9a45e1d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2268357
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68592}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2dc7c7a..d83f4a5

Rolling v8/third_party/aemu-linux-x64: UoYLOT0X6577j70eB9nPqYQs9Z3Nh5lA4I-pRtTchO0C..FN-ckx_oV2JTqPuW3iMG50qdN5FgGqm-4XP9AkoLwPUC

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/95c1f42..8353ff9

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/35c6274..6e6c67d

Rolling v8/third_party/zlib: https://chromium.googlesource.com/chromium/src/third_party/zlib/+log/02daed1..8603eee

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/42b285f..2479626

TBR=machenbach@chromium.org,tmrts@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I3bd5df9f3c05eee0f135b0ee49708024edddc812
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2269870
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#68591}

__declspec(nocf) syntax was added in https://reviews.llvm.org/D72167
and annotates that checks should not be added on indirect calls
within that function.

BUG=chromium:584575

Change-Id: Ib2e2d2a827186a9c1fd3de15356b2b04d6a69e49
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270707Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Will Harris <wfh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68590}

Prototype f64x2.floor on ARM for both ARM v7 and ARM v8. ARM v8 has
support for vrintm, and for ARM v7 we fallback to runtime.

Since ARM v8 uses vrintm, which is the same instruction used for
Float64RoundDown (scalar), wasm-compiler reuses the Float64RoundDown check.

Bug: v8:10553
Change-Id: I6f3d5c378a811ed94859535667aed1fa2d1ee552
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2265234Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68589}

This modernizes python code without breaking Py2 compat.

Ran with command:

futurize --stage1 -w predictable_wrapper.py
futurize --stage1 -w run-num-fuzzer.py
futurize --stage1 -w run-tests.py
futurize --stage1 -w v8_presubmit.py

This only adds the absolute import, which use these semantics. It
doesn't do anything differently in our case, these scripts are already
doing absolute imports. But with these changes, running `futurize
--stage2` will be less messy.

Bug: v8:9871
Change-Id: I28182ab73dac6cfcbd544c2046026f14e5157eb3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2252555Reviewed-by: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68588}

Bug: chromium:1056170
Change-Id: I24442979954f63dc8a2f8fd0494cc5d537b733a6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273131
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68587}

This shares the code of running the comparisons on the fuzz test
and on the smoke tests. While this change retains behavior for running
the fuzz test, the smoke test has slight changes in favor of code
readability:

1. Smoke tests can now bail out on output suppressions (There are
none now. And if we'd ever add any we'd need to write them in a way,
such that they ignore the output of the smoke tests, which don't
have much output anyways).
2. Crashes in smoke tests are now a hard failure. This is a desired
feature anyways. It's unlikely that the smoke test crashes as then
nothing would work.

No-Try: true
Bug: chromium:1100114
Change-Id: Ice3c6d18b549727c486a70756a72038c8b2029ac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273125
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68586}

An 'arguments' array cannot be allocated in young space when its size
exceeds kMaxRegularHeapObjectSize. In this case the optimizations in
JSCreateLowering::ReduceJSCreateArguments are skipped.

Bug: chromium:1098565
Change-Id: I30fdc78a1eb6e51fcd293785a46c9fd78995da9a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273121Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68585}

Change-Id: I9ad6402561f06b4c2069c08f452e52a4d6b533eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270402Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68584}

This adds a class representing all values needed for an execution.
It simplifies the parameters passed to formatting functions and
lifts the restriction of a first/second config pair in the options.

This will allow to run more than two configs in a follow up.

No-Try: true
Bug: chromium:1100114
Change-Id: I568253b8ca3220870b8f5af615108140587680a8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270550Reviewed-by: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68583}

The test was taking more than a minute before CL
https://crrev.com/c/2259933. Afterwards, it takes a lot longer, but I
could never reproduce a hang locally.
Let's re-enable and mark SLOW to increase the chance that it runs to
completion. We can then see how much slower it really got.

Also add some output that helps triaging in case it really hangs.

R=ahaas@chromium.org

Bug: v8:9506
Change-Id: I09a935ca0018517d45c6c008a099b8052bc45c47
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273117
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68582}

Relanding without changes, revert reason was fixed by:
https://chromium-review.googlesource.com/c/v8/v8/+/2272564

Originally reviewed at:
https://chromium-review.googlesource.com/c/v8/v8/+/2260566

Original description:
RTTs are internally represented as Maps. To store supertype information,
this patch introduces a WasmTypeInfo object, which is installed on Wasm
objects' Maps and points at both the off-heap type information and the
parent RTT.
In this patch, rtt.sub always creates a fresh RTT. The canonicalization
that the proposal requires will be implemented later.

Bug: v8:7748
Change-Id: I7fd4986efa3153ac68037ec418ea617f3f7636e8
Tbr: ulan@chromium.org
Tbr: tebbi@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273123Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68581}

Bug: chromium:1100266
Change-Id: Iaa847a50e9a79261fe9d9050db5046fa99352eaa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2273122
Auto-Submit: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68580}

This makes output and test-case suppressions independent of the used
comparison configs and architecture. Such fine-grained suppressions
were only needed during the inception of differential fuzzing, but
by now, most remaining suppressions are implemented in d8 behind
a flag.

This prepares for running with more than two comparison configs in a
follow up.

No-Try: true
Bug: chromium:1100114
Change-Id: I072769adb3ef7c6e6c43459aa23ac906f461b307
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270095
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68579}

Bug: chromium:1100266
Change-Id: I20df6d0d5bdd07aa69c4eecf68c1d2152ddc1bec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2272567Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68578}

It is obsolete to filter out error-message differences since the
time we pass --correctness-fuzzer-suppressions to d8, which already
stubs all messages:
https://cs.chromium.org/chromium/src/v8/src/execution/messages.cc?l=1031

No-Try: true
Bug: chromium:1100114
Change-Id: Iac42a8e2a32f9bae4034f79eaff429bf3ee41724
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270024Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68577}

This simplifies the lengthy main method by extracting some code and
by replacing the scattered returns with exceptions.

We introduce two exceptions for early bail-out. This enables helper
methods on multiple layers. The early bail-out on time-out is
moved to the point where it is detected.

Previously on timeout and crash we also printed out the step number.
Clusterfuzz doesn't parse this, it was only for statistical purposes,
and the latest version of the experimental workbench only parses
crashes and timeouts, not the step in which they happened. Hence,
this CL removes those step numbers.

Except the change described in the last paragraph, this CL doesn't
intend to change behavior.

No-Try: true
Bug: chromium:1100114
Change-Id: Ie8c18f183e4fc538577f3eb49aaf6df1acd1e4e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270547Reviewed-by: Liviu Rau <liviurau@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68576}

This slows down promise benchmarks since we process all unhandled promises.

Bug: vu:1099632
Change-Id: I2188a2842ec0a69ca93e5d406f10371ceff60f9b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270235Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68575}

The per-module caches for subtype relations and type equivalences are
accessed from several background compile jobs, so these accesses must
be guarded by a lock.
This issue was found by our TSan bots and caused the following revert:
https://chromium-review.googlesource.com/c/v8/v8/+/2270734

Bug: v8:7748
Change-Id: I0322972f8f72ca8aff3538bf3f78d4329e5f3a44
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2272564
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68574}

This sets up a relative path symlink to the XCode sysroot.

Bug: chromium:1100006
Change-Id: I04bd8ff5158f6e00a91391e6a49530cf1a46f6eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2269452Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68573}

Drive-by: Fix ref.is_null calling is_reference_type to typecheck its
argument (which would also allow rtts).

Bug: v8:7748
Change-Id: I2ad01d0f70ac15d37ac4cc344bd0280a7ca08073
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2264094
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68572}

Does step 5 of the linked bug.

Bug: chromium:1098923
Change-Id: I590cbaddb803f6343a61f7b49f7b8a4cb9773220
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270704
Auto-Submit: Nico Weber <thakis@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68571}

This adds a simple test runner that prints a line for every test with
the appropriate status prefix: PASS, FAIL, CRASH or TIMEOUT

Change-Id: Ic1ba78667c38cd4392af027bb6cb671b274680b7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2264098Reviewed-by: Liviu Rau <liviurau@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68570}

Port 2332ebd8
https://crrev.com/c/2264099

Original Commit Message:

  - Add a separate function to load return slots, instead of encoding this
  in the offset,
  - Add fast path for single return.

Change-Id: I065c35b95dbc6546387ea54d298bb5765bc342cd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2269456Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#68569}

Bug: chromium:1098899
Change-Id: I3ff79c00063f7da36b141a3a7b0d2daa71c9801a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270705
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Auto-Submit: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68568}

This reverts commit 04ce88ea.

Reason for revert: TSAN failure: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN/32135

Original change's description:
> [wasm-gc] Implement rtt.sub
> 
> RTTs are internally represented as Maps. To store supertype information,
> this patch introduces a WasmTypeInfo object, which is installed on Wasm
> objects' Maps and points at both the off-heap type information and the
> parent RTT.
> In this patch, rtt.sub always creates a fresh RTT. The canonicalization
> that the proposal requires will be implemented later.
> 
> Bug: v8:7748
> Change-Id: I8286dd11f520966155cd95c2bd844ec34fccd131
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2260566
> Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#68564}

TBR=ulan@chromium.org,jkummerow@chromium.org,tebbi@chromium.org

Change-Id: I311732e1ced4de7a58b87d4a9b6056e0d62aa986
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7748
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2270734Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68567}