Implement i8x16.popcnt, double precision conversions,
v64x2.alltrue and i64x2.ne.

Port: 00babf07
Port: 66964c51
Port: 1b81ffb1

Change-Id: I26f62f31fd362b06f7bcbf1988a8e2ff12d12504
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2706354
Auto-Submit: Liu yu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#72854}

Port: 257c303f

Bug: v8:11347,v8:11348,chromium:1174498

Change-Id: I1198ff37045e895082014918ec8d9f339893c1a4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2706307
Auto-Submit: Liu yu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#72853}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/99c7b26..d9000c9

Rolling v8/third_party/aemu-linux-x64: X81JiseHcDpE_0A4yjc6A232-BwI6vJSzYlXeAnpNwcC..SesU5Vh9_5Zm4yE0Qtuyv2VQ8UhCuhRMW3IkFgT7n0sC

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/5e37f6d..f362f6f

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/9990265..6cf138c

Rolling v8/tools/luci-go: git_revision:77944aa535e42e29faadf6cfa81aee252807d468..git_revision:fd10124659e991321df2f8a5d3749687b54ceb0a

Rolling v8/tools/luci-go: git_revision:77944aa535e42e29faadf6cfa81aee252807d468..git_revision:fd10124659e991321df2f8a5d3749687b54ceb0a

Rolling v8/tools/luci-go: git_revision:77944aa535e42e29faadf6cfa81aee252807d468..git_revision:fd10124659e991321df2f8a5d3749687b54ceb0a

TBR=v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: Id952af26eb7019ac2603e8f8ad94e93e1fe47300
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2706521Reviewed-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@{#72852}

We can use UseScratchRegisterScope instead of requiring a
TempSimd128Register in the instruction-selector. This reduces register
pressure a little bit (when combined with unique register constraints).

Drive-by cleanup of some variable names in code-generator, s/tmp2/tmp/
when there is only 1 tmp.

Bug: v8:11384
Change-Id: I00a365624cbabeaeeaf78d1d08f0eb284c7e44ac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2705523Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72851}

The atomic pause would not report any marked bytes which in turn would
mean that the used bytes counter would stay at 0 for testing GCs that
always use atomic marking.

Bug: chromium:1056170
Change-Id: Ie35d9b3bc88766c4ef56271f05d944f4835ba431
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704662
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72850}

My recent change https://crrev.com/c/v8/v8/+/2698057 changed the size of
bytecode for most functions, and attempted to update other heuristic
values to match. However, it caused V8 to be slightly too eager to
perform on-stack replacement in JetStream 2's gaussian-blur test case,
so that the function got compiled separately for each of two nested
loops rather than just once for the outer loop. This is the smallest
change that restores the previous behavior in that benchmark.

Bug: chromium:1179571
Change-Id: I03e98d6bff7355b775c1fdaf495e7444e7c6f095
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704882Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#72849}

- Remove unused type inference paths which will be replaced
  with more explicit structs.
- Removes the tagged pointer from CTypeInfo since the embedder
  will perform the type check for API objects.

Bug: chromium:1052746
Change-Id: I47a5f5ae35b06845b01b68cb089c67f76a7fb05e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2686685
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72848}

Stage 3 proposal: https://github.com/tc39/proposal-class-static-block

Bug: v8:11375
Change-Id: I579adab4679cce0190b9d8bd814a7cd297ebfa15
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2699449Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72847}

Since we'll immediately run the first check.

Bug: v8:11429
Change-Id: I47de46d8281b42c90d5cd1e1cbbfc6232c752da1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700672
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72846}

Change-Id: I78c6203a6415cc6a94ff4bcefa4421f8eb54cc0e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704291Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72845}

R=ahaas@chromium.org

Bug: chromium:1179545
Change-Id: I0dddf6198a9574c925ca4faaf6b7b70453887029
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704171Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72844}

R=ahaas@chromium.org

Bug: v8:8091
Change-Id: Id539bc96d9c791e3ed89d822189ab804ea9a24ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2699260Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72843}

Port: 3b6eb335

Bug: v8:11265

Change-Id: I6ecd95e64b18a8f45f0aaa2f40d15f8c8cd43340
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704212
Auto-Submit: Liu yu <liuyu@loongson.cn>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#72842}

Bug: v8:11420
Change-Id: I1289e2bb290ab80b761e2cdc3d85dff3621b4d0a
Fixed: v8:11465
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704151
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72841}

This avoids a lot of code repetition for generating the call descriptor
and the actual call for a runtime stub.

R=thibaudm@chromium.org

Bug: v8:11384, v8:11453
Change-Id: Ice5d5513534ee854b50e323d788fa5cb2630e627
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2702336
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72840}

... for creating a FixedArray.
Calling builtins is generally cheaper than calling into the runtime, and
this also saves us a int->Smi conversion.
The builtin still has the "Wasm" prefix, since it's only used in wasm
for now.

R=thibaudm@chromium.org

Bug: v8:11453
Change-Id: I0c5b6b71ae1b07608f51e685014a0e8dc0034111
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698674Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72839}

Modify the cctests for the inlined JS-to-Wasm calls to use the
%ObserveNode intrinsic, to verify that the JSCall node is actually
inlined . This requires a small refactoring of the %ObserveNode
implementation.

Bug: v8:11092
Change-Id: I01727143fec64c6c11c58b1b664f51daae5bfdb6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2677811
Commit-Queue: Paolo Severini <paolosev@microsoft.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72838}

... to reflect reversed parameters.

Change-Id: I3a709eb27f0c64f60ca3f5cb5b5fd7a1b8d5faa0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2702337
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72837}

Bug: chromium:1056170
Change-Id: I9151d31a27ed5fc8e8c98b77b2132aaa7ee562e1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2702334Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72836}

Eager evaluation in DevTools console relies on the builtins side
effect attribution.

Setters on Date object should be marked as no side effects if called
on the temporary object.

This bug was uncovered after considering screenshot from a tweet [1].

[1] https://twitter.com/shuding_/status/1362132984376160256

Change-Id: Iedc0e29e2bdab719304e2f0a0435845f24eaaadc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2703459Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72835}

There are two aspects to the non-JSObject parts of JSArrayRef:

- JSArrayRef::length. Relevant only in two spots, 1. when reading
(immutable) array boilerplates and 2. for GetOwnCowElement.

- JSArrayRef::GetOwnCowElement. May read into a copy-on-write backing
store. Relies on the invariant that cow backing stores are immutable.

This CL renames the length accessor to length_unsafe to make the
danger explicit at callsites.

For GetOwnCowElement the refactor is slightly larger, since we now
need to read into the backing store while keeping full control of
object reads (e.g. JSArray::length and JSArray::elements_kind). We
make all reads explicit at the call site by requiring that elements,
elements kind, and length are passed in as arguments to
GetOwnCowElement. Inside GetOwnCowElement, consistency between these
is *not* guaranteed due to concurrency. At runtime, consistency *is*
guaranteed through the reference-equality check on the elements seen
during compilation. The actual elements read is implemented in
ConcurrentLookupIterator::GetOwnCowElement.

Bug: v8:7790
Change-Id: I9aa169ce4f2b1e2bfe1e9232007669eb7654a995
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2695403
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72834}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/a42736b..99c7b26

Rolling v8/third_party/aemu-linux-x64: 9VxcXi3GhpRxrjwHQwa801vcevGa1Pew2lw1KkUkgmgC..X81JiseHcDpE_0A4yjc6A232-BwI6vJSzYlXeAnpNwcC

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/0391863..5e37f6d

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/12825ed..dc4ceac

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/823dc87..9990265

TBR=v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I8bf2a912e9015661d40c5bff074c862d98554080
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2703456Reviewed-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@{#72833}

Process global accessors for total physical size and used size are
needed for blink. These are implemented via an allocation observer that
atomically updates static counters.

The public api only provides getters for the counters. An internal class
is in charge of updating the counters as needed. A similar split is also
applied to IsAnyIncrementalOrConcurrentMarking().

Drive-by: ProcessHeap is merged into cppgc::internal::WriteBarrier.

Bug: chromium:1056170
Change-Id: Iaedebd1ac9d49238ce6bdd52ffa5d1ef4d28203d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2695394
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72832}

IsMarking returns true as long as a marker exists. That means IsMarking
is true during weak processing as well.
ActiveScriptWrappableManager in blink uses a weak callback that updates
a HeapVector and thus can trigger a write barrier during the atomic
pause (which violates a DCHECK in the barrier).

Bug: chromium:1056170
Change-Id: I6304b38da9751320836a5e2407e8c7d529367bad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700676Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72831}

ScopeInfo has a vestigial 'length' field from when it used to be a
FixedArray. This change removes that field, which saves some memory.

More specifically:

- Make ScopeInfo inherit from HeapObject, not FixedArrayBase which
  supplied the 'length' field.
- Privatize the FixedArray-style functions that provide access to
  ScopeInfo fields by index, and move them from scope-info-inl.h to
  scope-info.cc. Those functions are still used pretty heavily during
  initialization (ScopeInfo::Create, etc.), but at least we can avoid
  presenting them to the rest of the world.
- Change FactoryBase::NewScopeInfo to allocate the updated object shape.
  It maintains the existing behavior of filling the newly-allocated
  object with undefined, even though that's not a valid ScopeInfo and
  further initialization is required.
- Move part of AccessorAssembler::ScriptContextTableLookup into a new
  Torque macro, because it used to rely on casting ScopeInfo to
  FixedArrayBase.
- In V8HeapExplorer::AddEntry, don't claim that ScopeInfo objects are
  arrays. I think it makes more sense to list them under "(system)" in
  the dev tools, like most other V8 internal types.

Bug: v8:8952
Change-Id: I8278e3a90027d4409f0d268da0fe7080754c6b8c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2601880Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#72830}

This reverts commit 2f8a7561.

Reason for revert: Speculative revert, lots of segfaults on Arm:
https://ci.chromium.org/p/v8/builders/ci/V8%20Arm%20-%20debug/17781

Original change's description:
> [dict-proto] C++ implementation of SwissNameDictionary, pt. 3
>
> This CL is part of a series that adds the C++ implementation of
> SwissNameDictionary, a deterministic property backing store based on
> Swiss Tables.
>
> This CL adds the initialization code, factory functions and a
> canonical SwissNameDictionary plus all helpers required for that.
>
> Bug: v8:11388
> Change-Id: I6bb92740afefc7d05433cfa62023e6da5e8213c7
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2688058
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Frank Emrich <emrich@google.com>
> Cr-Commit-Position: refs/heads/master@{#72824}

Bug: v8:11388
Change-Id: Ia5dae584b0fb452b12c5d64ee63ffa418c83f91b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698758
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72829}

Change-Id: Ie7fbaebda580787a6261f0bc56fc1bde370148e4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698928Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72828}

After https://crrev.com/c/2695401, CachRegs needed to be defined
on PPC to overwrite the default value "0xff".

The default value was causing the following failure on some tests:

```
#
# Fatal error in ../../src/wasm/baseline/liftoff-register.h, line 160
# Debug check failed: 0 != kLiftoffAssemblerGpCacheRegs & reg.bit()
  (0 vs. 0).
```

Values are taken from `src/execution/ppc/frame-constants-ppc.h`.

Change-Id: Idfc1d0fdc20d0b5aabc25e5b5809a93073a2dc3d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698930Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72827}

Bug: v8:11374
Change-Id: Ia7845f92a6b7f98e310596b182ebad7a4a097878
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2697354
Commit-Queue: Marja Hölttä <marja@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Auto-Submit: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72826}

This missing include was undetected because trace_perf.cc is only
built if the checkout_google_benchmark custom gclient variable is
defined.

Bug: none
Change-Id: If2016edad4df382f14903593ea18066f7759c4d5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698387Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Chris Mumford <cmumford@google.com>
Cr-Commit-Position: refs/heads/master@{#72825}

This CL is part of a series that adds the C++ implementation of
SwissNameDictionary, a deterministic property backing store based on
Swiss Tables.

This CL adds the initialization code, factory functions and a
canonical SwissNameDictionary plus all helpers required for that.

Bug: v8:11388
Change-Id: I6bb92740afefc7d05433cfa62023e6da5e8213c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2688058Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Frank Emrich <emrich@google.com>
Cr-Commit-Position: refs/heads/master@{#72824}

Allow filtering what functions compile with Sparkplug.

Bug: v8:11420
Change-Id: Ib70c4405687ec527109f2adbf87b58a51aae9870
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700671
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72823}

Bug: v8:11429
Change-Id: If5d50cad91406d00e11ef8a6335dc492a4a38d57
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698671
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72822}

This is a reland of cf93071c

Original change's description:
> [interpreter] Short Star bytecode
>
> Design doc:
> https://docs.google.com/document/d/1g_NExMT78II_KnIYNa9MvyPYIj23qAiFUEsyemY5KRk/edit
>
> This change adds 16 new interpreter opcodes, kStar0 through kStar15, so
> that we can use a single byte to represent the common operation of
> storing to a low-numbered register. This generally reduces the quantity
> of bytecode generated on web sites by 8-9%.
>
> In order to not degrade speed, a couple of other changes are required:
>
> The existing lookahead logic to check for Star after certain other
> bytecode handlers is updated to check for these new short Star codes
> instead. Furthermore, that lookahead logic is updated to contain its own
> copy of the dispatch jump rather than merging control flow with the
> lookahead-failed case, to improve branch prediction.
>
> A bunch of constants use bytecode size in bytes as a proxy for the size
> or complexity of a function, and are adjusted downward proportionally to
> the decrease in generated bytecode size.
>
> Other small drive-by fix: update generate-bytecode-expectations to emit
> \n instead of \r\n on Windows.
>
> Change-Id: I6307c2b0f5794a3a1088bb0fb94f6e1615441ed5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2641180
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Cr-Commit-Position: refs/heads/master@{#72773}

Change-Id: I1afb670c25694498b3989de615858f984a8c7f6f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2698057
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72821}

Previously, ephemerons without a base_object_payload have been
filtered.  base_object_payload is currently used to differentiate
between GarbageCollected and just traceable objects, so we need to
pass on the empty descriptor.

Bug: chromium:1056170
Change-Id: I9cba53295779ec74dce2822b7bf83f477bc3241f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700039Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72820}

Move the CompileWithBaseline interface to the Compiler class, as
CompileBaseline, which will do the additional work of pre-compiling
to bytecode, ensuring there is a feedback vector, and setting the
code on the function closure.

As a drive-by, fix v8_enable_trace_unoptimized to have a blank default
value, so that v8_enable_trace_ignition/v8_enable_trace_baseline_exec
can set it.

Bug: v8:11420, v8:11429
Change-Id: If715161de71f7d9300f3fdcbb50cc678b1fcdfdf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2697352Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72819}

Bug: v8:11344
Change-Id: I407e6a9afa0c813f9a41b5e7f0e6ff72f768ffea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2699264Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Almothana Athamneh <almuthanna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72818}

R=ahaas@chromium.org

Bug: v8:8091
Change-Id: Ie3450c2a55d2fd272efc6c69632cf52a9aede597
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2699259
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72817}

Port af3c5307

Original Commit Message:

    This threads through a JumpMode kJump/kReturn to JumpCodeObject so we
    can use a return instruction to jump instead by first pushing the jump
    target and then using a return instruction.

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

Change-Id: I354329238d00503a234556f25adccd920d26d320
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700036Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72816}

This prevents conflicts with e.g. --always-opt

Fixed: v8:11462
Change-Id: Ib98378a1bf620f5706bf3eef06f997bd994b1e2c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2700035
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72815}