Since https://chromium-review.googlesource.com/c/v8/v8/+/1791632 sped it
up, there is no need to mark it as SLOW.

Bug: v8:7783
Change-Id: I24d1b2f1e56dff4c820d397288ab3ad7662ae06b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1800564Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63712}

This was missed during a file move and can cause build bugs.

Bug: chromium:991547
Change-Id: I157e7bb656956c08293c205c0d00884aecc7adee
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798430
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Auto-Submit: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63711}

Bug: v8:7790
Change-Id: I1abffc574b1d9964940625b1f15fc4d98f170b7b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798682
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63710}

This fixes the case where a table entry contains a function constructed
via {WebAssembly.Function} and is then read out via a runtime function
from the table.

R=ahaas@chromium.org
TEST=mjsunit/regress/wasm/regress-crbug-1002388
BUG=chromium:1002388

Change-Id: Ic0a9a544baaf37e68cd22eb91f2ef0bdf5fa5842
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1795352Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63709}

Currently the dispatch table could be accessed out of bounds if something
is wrong with the generated bytecode.
OOB access of the dispatch table can lead to jumps to arbitrary addresses
in the code space.

This CL prevents this issue by changing the following:
BYTECODE_MASK now filters out all bits not currently used for bytecodes.
All unused slots between the last actually defined bytecode and
BYTECODE_MASK are now filled with BREAK Bytecodes (invalid operation).
This way we can not access out of bounds of the dispatch table if
something is broken/tampered with, preventing jumps to arbitrary code.

Bug: v8:9699
Change-Id: Ibce591ae94b52472ba74a9fd0666e55185af7b2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1795349
Commit-Queue: Patrick Thier <pthier@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63708}

This reverts commit d0c980e1.

Reason for revert: Regressions: https://chromeperf.appspot.com/group_report?rev=63641

Original change's description:
> [regalloc] Enable control-flow aware allocation
> 
> This is meant to check the performance impact of:
> https://chromium-review.googlesource.com/c/v8/v8/+/1776085/3
> 
> R=​neis@chromium.org
> 
> Bug: v8:9088
> Change-Id: I8aad5272c1427b8bcaca02bdd0e51bf2779f7451
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1781054
> Reviewed-by: Georg Neis <neis@chromium.org>
> Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63641}

TBR=neis@chromium.org,thibaudm@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: v8:9088
Change-Id: I8228de030b8ea1066e4a26516d66517dc1dc6ca4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798684Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63707}

This reverts commit 4a16305b.

Reason for revert: Need to revalidate assumptions behind the CHECK.

Original change's description:
> [compiler] Optionally apply an offset to stack checks
> 
> The motivation behind this change is that the frame size of an optimized
> function and its unoptimized version may differ, and deoptimization
> may thus trigger a stack overflow. The solution implemented in this CL
> is to optionally apply an offset to the stack check s.t. the check
> becomes 'sp - offset > limit'. The offset is applied to stack checks at
> function-entry, and is set to the difference between the optimized and
> unoptimized frame size.
> 
> A caveat: OSR may not be fully handled by this fix since we've already
> passed the function-entry stack check. A possible solution would be to
> *not* skip creation of function-entry stack checks for inlinees.
> 
> This CL: 1. annotates stack check nodes with the stack check kind, where
> kind is one of {function-entry,iteration-body,unknown}. 2. potentially
> allocates a temporary register to store the result of the 'sp - offset'
> in instruction selection (and switches input registers to 'unique'
> mode). 3. Applies the offset in code generation.
> 
> Drive-by: Add src/compiler/globals.h for compiler-specific globals.
> 
> Bug: v8:9534,chromium:1000887
> Change-Id: I257191c4a4978ccb60cfa5805ef421f30f0e9826
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1762521
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63701}

TBR=neis@chromium.org,sigurds@chromium.org,jgruber@chromium.org

Change-Id: Iebf46d5256b6dee13451741781ef85a5fe9b1628
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9534, chromium:1000887
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1800565Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63706}

Bug: v8:9429
Change-Id: Id775a765d9700e1d2c46b4598f5e4c8350e28f14
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1796340Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63705}

Current GetIterator bytecode loads and calls @@iterator property on a
given object. This change extends the bytecode functionality to check
whether the value returned after calling @@iterator property is a valid
JSReceiver. The bytecode throws SymbolIteratorInvalid exception if the
returned value is not a valid JSReceiver. This change absorbs the
functionality of additional two bytecodes - JumpIfJSReceiver and
CallRuntime, that are part of the iterator protocol in the GetIterator
bytecode.

Bug: v8:9489
Change-Id: I9e84cfe85eeb9a1b8a97ca0595375ac26ba1bbfd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1792905Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Swapnil Gaikwad <swapnilgaikwad@google.com>
Cr-Commit-Position: refs/heads/master@{#63704}

This removes the {base::ReversedAdapter} class and uses
{base::iterator_range} instead. The types are inferred from what
{std::rbegin} and {std::rend} return.

Since src/base/adapters.h would only contain this one method after
this refactoring, it was merged into src/base/iterator.h.
Some includes of src/base/adapters.h were unused and hence dropped.

R=mlippautz@chromium.org

Bug: v8:9396
Change-Id: I597172ec790193b73af196d1afcd64bbed0a597d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798432Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63703}

https://chromium.googlesource.com/external/github.com/tc39/test262/+log/59a1a01..ef7fd2bc

Bug: v8:7834, v8:9712
Change-Id: Iebc11aa3be2fa692bfae7069f45e89d795132cfa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1799398
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63702}

The motivation behind this change is that the frame size of an optimized
function and its unoptimized version may differ, and deoptimization
may thus trigger a stack overflow. The solution implemented in this CL
is to optionally apply an offset to the stack check s.t. the check
becomes 'sp - offset > limit'. The offset is applied to stack checks at
function-entry, and is set to the difference between the optimized and
unoptimized frame size.

A caveat: OSR may not be fully handled by this fix since we've already
passed the function-entry stack check. A possible solution would be to
*not* skip creation of function-entry stack checks for inlinees.

This CL: 1. annotates stack check nodes with the stack check kind, where
kind is one of {function-entry,iteration-body,unknown}. 2. potentially
allocates a temporary register to store the result of the 'sp - offset'
in instruction selection (and switches input registers to 'unique'
mode). 3. Applies the offset in code generation.

Drive-by: Add src/compiler/globals.h for compiler-specific globals.

Bug: v8:9534,chromium:1000887
Change-Id: I257191c4a4978ccb60cfa5805ef421f30f0e9826
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1762521
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63701}

This moves the code to allocate the far jump table from
{SetRuntimeStubs} to {AddCodeSpace} to allocate one such table per code
space.
Also, the {runtime_stub_table_} and {runtime_stub_entries_} fields do
not make sense any more now and are replaced by calls to
{GetNearRuntimeStubEntry} and {GetRuntimeStubId}.

R=mstarzinger@chromium.org

Bug: v8:9477
Change-Id: Ie1f5c9d4eb282270337a684c34f097d8077fdfbb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1795348
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63700}

To make --trace-zone-stats output more meaningful.

Bug: v8:9574
Change-Id: I06cb725b11e3815c23294310270774b7148c64eb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1795355
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63699}

This reverts commit 5e0e5829.

Reason for revert: Still breaks android builders: https://ci.chromium.org/p/v8/builders/ci/V8%20Android%20Arm64%20-%20builder/28054 and https://ci.chromium.org/p/v8/builders/ci/V8%20Android%20Arm%20-%20builder/28026

Original change's description:
> Update V8 DEPS.
> 
> Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2d9fa32..716ef3d
> 
> Rolling v8/buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/74cfb57..cd73d21
> 
> Rolling v8/buildtools/linux64: git_revision:152c5144ceed9592c20f0c8fd55769646077569b..git_revision:ad9e442d92dcd9ee73a557428cfc336b55cbd533
> 
> Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/884c81e..c979465
> 
> Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/e5641be..0910f78
> 
> Rolling v8/third_party/googletest/src: https://chromium.googlesource.com/external/github.com/google/googletest/+log/3a45039..33a0d4f
> 
> Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/53f6b23..faee8bc
> 
> Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/51c4acf..e7d79d1
> 
> TBR=machenbach@chromium.org,tmrts@chromium.org
> 
> Change-Id: Ib53bf18762e6e8828a6e6cf5cd57ee361bfc5ee4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1799962
> Reviewed-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@{#63697}

TBR=machenbach@chromium.org,v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com,tmrts@chromium.org

Change-Id: Ib1a643744ff6b664a6b9164e4005b263d676171f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798611Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63698}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2d9fa32..716ef3d

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/74cfb57..cd73d21

Rolling v8/buildtools/linux64: git_revision:152c5144ceed9592c20f0c8fd55769646077569b..git_revision:ad9e442d92dcd9ee73a557428cfc336b55cbd533

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/884c81e..c979465

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/e5641be..0910f78

Rolling v8/third_party/googletest/src: https://chromium.googlesource.com/external/github.com/google/googletest/+log/3a45039..33a0d4f

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/53f6b23..faee8bc

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/51c4acf..e7d79d1

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

Change-Id: Ib53bf18762e6e8828a6e6cf5cd57ee361bfc5ee4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1799962Reviewed-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@{#63697}

Add should_pause to V8StackTraceId in preparation for
async stepping simplification [1].

[1] https://chromium-review.googlesource.com/c/v8/v8/+/1783724

BUG=chromium:1000475
TBR=yangguo@chromium.org

Change-Id: I3a90d33322c83f624a3d28c18ebdfff80b2cd904
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1799453Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63696}

This reduces the runtime from ~20m to ~2m (very unscientific measure
based on running the entire asm-wasm-i32 test with and without this
change).

I removed most of the constants that looked uninteresting, e.g. testing
for 10, 20, 30, isn't that interesting. The edge cases are left
untouched, min/max signed positive/negative ints and +/- 1 from both.

Bug: v8:7783
Bug: v8:9396
Change-Id: Ice363fc3f786dd55ff118ffa42f9ecea07880338
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1791632Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63695}

This adds a new API function and provides a simple implementation
of performance.measureMemory() in d8. The implementation currently
immediately resolves the result promise with the current heap size.

Bug: chromium:973627

Change-Id: Ia8e1963a49b7df628b5487a2c0d601473f0cb039
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1796502
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63694}

Implementations for other architectures will follow in subsequent
changes.

Bug: v8:8460
Change-Id: I279388ab76b1d88d65cbe179088be5573c17fc58
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1796317
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63693}

This reverts commit 591d1c9d.

Reason for revert: breaks blink

Original change's description:
> [top-level-await] Implement top-level-await in V8
> 
> Implements AsyncModules in SourceTextModule. However, there is no
> support in the parser or D8 for actually creating / resolving
> AsyncModules. Also adds a flag '--top-level-await,' but the only
> external facing change with the flag enabled is that Module::Evaluate
> returns a promise.
> 
> Bug: v8:9344
> Change-Id: Idc722efc1e2aa780d04bdb985bb7920ab969d34e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1728037
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Commit-Queue: Joshua Litt <joshualitt@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63686}

TBR=ulan@chromium.org,adamk@chromium.org,neis@chromium.org,joshualitt@chromium.org

Change-Id: I6ceeb3a293a948af04bf200ab784ceb03386a3fd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9344
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1797656Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63692}

This speeds up the check by ~10x.

This was tested by writing a simple test that compares a for-loop and
array.every():

for (var i = 0; i < kMemSize; i++) {
      assertEquals(0, array[i]);
}

assertTrue(array.every((e => e == 0)));

The for-loop takes ~180s, every() takes ~19s.

Numbers above are for arm.debug build (simulator). On x64.debug builds
we can see a similar 10x improvement, from ~6s to ~400ms.

Bug: v8:7783
Bug: v8:9396
Change-Id: I83d46c7ec4a634612032c1d79585339cadb8b641
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1793904
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63691}

Remove unused/unimplementation private method that has a NOLINT comment

Bug: v8:9429
Change-Id: I8c5de440c8b456586b3a7c1a92af2d9a1fca4e78
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1792231
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63690}

... and the following helper methods:
- IntPtrOrSmiConstant
- IntPtrOrSmiXXX
- Increment
- Decrement

Bug: v8:9708
Change-Id: I9da8bba4da2012a873fd3f23972c678ff80eec21
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798623Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63689}

This is a first step towards removal of dynamic ParameterMode.

Bug: v8:9708
Change-Id: I3502584264952dc12b44fd85b91274c9a0ddf31d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798622Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63688}

Ensure that the jump tables do not take more than 50% of newly reserved
code spaces. In particular, this ensures that the jump tables always
fit in the newly reserved code space.

R=mstarzinger@chromium.org

Bug: v8:9477
Change-Id: I72cdbb7c7dc7916167594c0fc8e1ddb1511756ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1782559
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63687}

Implements AsyncModules in SourceTextModule. However, there is no
support in the parser or D8 for actually creating / resolving
AsyncModules. Also adds a flag '--top-level-await,' but the only
external facing change with the flag enabled is that Module::Evaluate
returns a promise.

Bug: v8:9344
Change-Id: Idc722efc1e2aa780d04bdb985bb7920ab969d34e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1728037Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Joshua Litt <joshualitt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63686}

SharedFunctionInfos that do not belong to a script were tracked in
noscript_shared_function_infos. However this was only used in object-stats.
Remove this since it was actually leaking memory in some use cases.

Bug: v8:9674
Change-Id: I9482f7e5dedf975666a70684b3d2ea04c9a23518
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798423Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63685}

Removed all references in .pyl files.

Bug: v8:9694
Change-Id: Id6f1f6075b022836cda4f0b3d61eb0edbead17db
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798422Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Liviu Rau <liviurau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63684}

This is a reland of d7d25d2a

Original change's description:
> [wasm] Patch jump tables in all code spaces
> 
> If there are multiple code spaces, make sure to patch the jump tables
> in all of them.
> 
> R=mstarzinger@chromium.org
> 
> Bug: v8:9477
> Change-Id: I2ec3d3de913b99623fd310004555337329588da0
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1789289
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63651}

Bug: v8:9477
Change-Id: I89c3d59d8366ac9479e58feea91dd40ee4e01f66
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1796065
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63683}

The jump table assembler is implemented on all architectures now, so
remove the default code. It would be untested otherwise.

R=mstarzinger@chromium.org

Change-Id: I45e42fc04ebb3bb07d975648b1498e2ea4e757d4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1796328
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63682}

... to precisely express which guarantees does this operator provide.

Drive-by-fix: use it for other tag-checking predicates in CSA.

Bug: v8:9396
Change-Id: Ifee22922ac02ec8866038be1a97625a32638d521
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1795504
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63681}

This adds the --wasm-far-jump-table flag, which enables the extension
of the far jump table with a slot for each wasm function.

R=mstarzinger@chromium.org

Bug: v8:9477
Change-Id: I61cb4592aa8ed75e2772371e9b7dbfdfe9bb0046
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1792907
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63680}

This CL renames the runtime stub table to far jump table, and changes
the implementation so it can later be patched concurrently.
A follow-up CL will extend this table to also contain slots for wasm
functions (if needed).

R=mstarzinger@chromium.org

Bug: v8:9477
Change-Id: I20bf0a0bb66dc0333f794761c1506b27137b53e7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1789159
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63679}

Change-Id: Ie0bd818c629bed3011212fb7c8ab81202a462501
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1798424Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63678}

This patch uses a bit in the Variable bit fields to distinguish
static private names from instance private names, so that we
can check the conflicts of private accessors that are complementary
but with different staticness in the parser, and use this
information later when generating code for checking static brands
for private method access.

Design doc: https://docs.google.com/document/d/1rgGRw5RdzaRrM-GrIMhsn-DLULtADV2dmIdh_iIZxlc/edit

Bug: v8:8330
Change-Id: I8d70600e594e3d07f77ea519751b7ca2e0de87b5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1781010Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Joyee Cheung <joyee@igalia.com>
Cr-Commit-Position: refs/heads/master@{#63677}

R=clemensh@chromium.org
BUG=v8:8519

Change-Id: I3c63637fb9cb694e4d50be2fded1dcc02de7f2ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1796559
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63676}

Also converts ACP from a Cell to a PropertyCell.

Bug: v8:9463
Change-Id: I6cd26d4e4fd8869a17bf75f83cc177524f8082d7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1795742Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Joshua Litt <joshualitt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63675}

... to make it "smi-corrupting" decompression-friendly.

Also add a cctest for the CSA implementation.

Bug: v8:9706
Change-Id: I1f1b0aa1b40832a0c2ce81658da316b3e442189c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1796802Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63674}

Bug: v8:6949, v8:9396
Change-Id: I19b865bea9ebe40f8f96cd220963cd3181412c82
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1792906
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63673}