Change-Id: If2610987b66324a4b77531628c5058c3b31b8718
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1637463Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61951}

CompressedHeapConstant is used in the DecompressionElimination Reducer to
create compressed HeapConstant values. It won't appear in the graph
up until that point.

This CL enables back the disabled tests in DecompressionElimination, as
well as generating the CompressedHeapConstant in that reducer.

The RelocInfo has already been added for x64 but not for arm64. Therefore,
the x64 version is now doing the mov on 32 bits. The support for ARM will
come in a following CL, and for now it is doing the mov in 64 bits.

Cq-Include-Trybots: luci.v8.try:v8_linux64_pointer_compression_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_linux64_arm64_pointer_compression_rel_ng
Bug: v8:8977, v8:7703, v8:9298
Change-Id: If0ca4f937cfa60501679e66f6fd5ded2df38f605
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632236Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61950}

Array push / pop / shift were inlined if the elements kind of the
receiver maps is the same. This cl extends it by inlining these
builtins even when the receiver maps have different elements kinds.
It still limits it to only fast elements kinds. This is required to
prevent regressions in deltablue when lazy feedback allocation is
enabled. With lazy feedback allocation we may see polymorphic
feedback more often, since we don't have allocation site feedback
till the feedback vectors are allocated.

Bug: v8:9078
Change-Id: Id4a7b84be6305b125913b6ce0fb4f3eb3e3b15ec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632239
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61949}

This fixes a problem where ICs for transitioning stores go MEGAMORPHIC
if the transition target map dies in between invocations of the IC,
which is totally possible, since we only hold on weakly to these
transition targets (both from the FeedbackVectors and also from the
TransitonArrays).

The root problem here was an inconsistency in how the maps and handlers
are being reported by the FeedbackVector. On the on hand side the method
FeedbackVector::ExtractMaps() will report all receiver maps that are
still present (i.e. which haven't died themselves), but then the other
method FeedbackVector::FindHandlers() will only report handlers that are
still alive (i.e. which in case of transition target maps being used as
handlers haven't died yet). If the length of these lists don't match the
IC chickens out and goes MEGAMORPHIC. But this is exactly the case with
the transitioning stores, where there's no handler anymore, i.e. as can
be seen in this simple example:

```
// Flags: --expose-gc
function C() { this.x = 1; }
new C();
new C();
gc();     // map with the `C.x` property dies
new C();  // now the STORE_IC in C goes MEGAMORPHIC
```

So the problem is that we have these two methods that don't agree with
each other. Now FeedbackVector::ExtractMaps() is also used by TurboFan
and it even reports receiver maps for PREMONOMORPHIC state, which is
different from the use case that the ICs need. So I replaced the
FeedbackVector::FindHandlers() with a completely new method
FeedbackVector::ExtractMapsAndHandlers(), which returns both the maps
and handlers, exactly as the ICs need it. And only returns pairs for
which both the receiver map and the handler are still alive.

This fixes the odd problem that sometimes STORE_ICs going MEGAMORPHIC
for no apparent reason. Due to the weakness of the transition target
maps, they can still die and cause deoptimizations, but at least
TurboFan will now be able to reoptimize again later with the new maps
and still generate proper code.

Bug: v8:9316
Cq-Include-Trybots: luci.chromium.try:linux-rel,win7-rel
Change-Id: I74c8b60f792f310dc813f997e69efe9ad434296a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1637878
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61948}

The size is now computed as a fraction of the old space size:
- for low memory devices (<512MB) the fraction is 1 / 256.
- for all other devices the fraction is 1 / 128.

The values were chosen to minimize the difference between the new
and the old heuristics.

Bug: v8:9306

Change-Id: I3246fe2d6fc589af6220e2566e3f10fb13470b82
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632158Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61947}

This makes the API more consistent and reduces the cognitive load of
switching between 'next' and 'Next'.

Bug: v8:9183
Change-Id: Ia81b874374626887d6af8c90f8ac185812f0573f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635689Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Cr-Commit-Position: refs/heads/master@{#61946}

Port c354fb9c

Original Commit Message:

    This CL adds a new enum {LiftoffBailoutReason}, and tracks this reason
    for each bailout. This will give us data to prioritize extensions of
    Liftoff for new proposals or last missing instructions. Since we also
    track the {kSuccess} case, we will also see what percentage of
    functions can be compiled with Liftoff overall.

R=clemensh@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: Iaf93d59780f62f03ccdcd5368ce4331e8b496f52
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1638004Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#61945}

Bug: chromium:967663
Change-Id: I1f2176dfeb435d10cc5c24cbba77119575315f03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635893Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61944}

counter_ could never be RO_SPACE. Make sure RO_SPACE and OLD_SPACE are
marked as unreachable.

Added tests for PagedSpaces and SpaceIterator.

Bug: v8:9183
Change-Id: I97bc2b4e0e5af37363a1c628ca7d69d2790a97b4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635696
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61943}

Without this, asan (rightfully) complains about read-only space leaking.

Because pages are manually allocated using mmap, a few objects within
them need to be explicitly ignored in addition to the read-only heap
itself.

This change re-adds lsan.h, with tweaks to make the type checking a bit
more lenient.

Bug: v8:7464
Change-Id: I0e2809930f3674e3f891e755b568ebb5194da461
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1622121Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Cr-Commit-Position: refs/heads/master@{#61942}

Bug: v8:9183
Change-Id: I53ad134b6dc8611ba439b78f27bfc8e56a82169e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635697Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Cr-Commit-Position: refs/heads/master@{#61941}

ReadOnlySpace::Contains uses owner() which will eventually be set to
nullptr. Use ReadOnlyHeap::Contains instead.

Bug: v8:7464
Change-Id: I2b33c40b937768ff06536fb17be8d57727a8dd22
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635695Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Maciej Goszczycki <goszczycki@google.com>
Cr-Commit-Position: refs/heads/master@{#61940}

This CL adds a new enum {LiftoffBailoutReason}, and tracks this reason
for each bailout. This will give us data to prioritize extensions of
Liftoff for new proposals or last missing instructions. Since we also
track the {kSuccess} case, we will also see what percentage of
functions can be compiled with Liftoff overall.

R=mstarzinger@chromium.org
CC=jwd@chromium.org

Change-Id: I42b6a14c5a298ddda7053c195e8b650dc1fe66dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634910Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61939}

The `FunctionTemplate::SetHiddenPrototype()` API was removed in a
previous CL, after being deprecated since beginning of the year. This
removes all the logic behind it, leaving us with just the special case
of the JSGlobalProxy which has the JSGlobalObject as its hidden prototype.

This gives us back one bit in `Map::bit_field2` and removes quite a bit
of complexity from the code base (especially due to previous work from
verwaest@ in this area).

Bug: v8:9267
Change-Id: Id04b59686212fe35a63c9451aa3e045f0766b9cc
Cq-Include-Trybots: luci.chromium.try:linux-rel,win7-rel
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1619752
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61938}

Truncation::Float64 is confusing; in reality, we mean that oddballs
and big-ints are identified with their ToNumber counterparts.

Bug: v8:9183
Change-Id: Ibcce990327ac7e01e36a2237ad39c374ac9922aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632224
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61937}

R=rmcilroy@chromium.org

Bug: v8:9247
Change-Id: I2644436fd44ecf0e206a81cf28071cccb49793df
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635690
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61936}

Rolling v8/test/wasm-js/data: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/bc7d300..41747be

Remove extraneous copyright from bikeshed document (#1030) (Ben Smith)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/41747be

[test/interpreter] Rounding edge cases for float literals (#1025) (Andreas Rossberg)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/4bf74f6

Editorial: Remove links from Number, Object when checking types (Daniel Ehrenberg)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/b8faae7

[interpreter] Fix edge cases for f32_convert_i64 (#1021) (Andreas Rossberg)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/356886f

[spec] Address feedback on section 4 (#1022) (Andreas Rossberg)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/9fd0547

[spec] Tweak wording (#966) (Andreas Rossberg)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/a0e1a7e

[spec][js-api] Fix some links (#1020) (Ben Smith)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/39646d1

TBR=ahaas@chromium.org,clemensh@chromium.org

Change-Id: I543114a3147fac367f9e03962b7cbbad172c9fd8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1638223Reviewed-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@{#61935}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/19aa2f3..355210a

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/7760fd2..b8451b7

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/9779b14..bad01ad

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/65e8ecf..1f646a8

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

Change-Id: I5cf09857950c36a67630c3ed6e0cdf37202b4141
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1638222Reviewed-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@{#61934}

port https://crrev.com/c/1632235 (65f3861e) to mips.
Original Commit Message:
    So far, calls to Wasm C/C++ API functions reused the call descriptors
    of WasmImportWrappers, and the stack frame type of regular Wasm
    functions. This CL cleans that up by introducing separate implementations
    for both. No change in functionality or performance is expected.

Change-Id: I1d068e9baab403d714ddb31c26f97fa4e5becb41
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635275
Commit-Queue: Yu Yin <xwafish@gmail.com>
Auto-Submit: Yu Yin <xwafish@gmail.com>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61933}

WeakFixedArray, WeakArrayList, JSFinalizationGroup, JSFinalizationGroupCleanupIterator, WeakCell, JSWeakRef, BytecodeArray, SourcePositionWithFrameCache

Note: SourcePositionTableWithFrameCache doesn't derive from Tuple2 anymore.
Bug: v8:8952

Original CL: https://chromium-review.googlesource.com/c/v8/v8/+/1504433

Change-Id: I13f102b445c9ff3e1ebabe0cdf013c62bb6d771d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1559212
Commit-Queue: Irina Yatsenko <irinayat@microsoft.com>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61932}

Bug: v8:8952
Change-Id: I37410feab6fb24b306ba8712013267ba1ff5bc5d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1618341Reviewed-by: Simon Zünd <szuend@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Suraj Sharma <surshar@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#61931}

This makes it so that v8 stops using the copy of the
endoding library in the template - that is,
third_party/inspector_protocol/lib/encoding_{h,cpp}.template -
and uses the C++ library directly instead. This is done
by having third_party/inspector_protocol/lib/Values_cpp.template
include it, which is configured in the
inspector_protocol_config.json.

Change-Id: I1f8f2541ac2ed588ca35249e383b4c569434022b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635598Reviewed-by: Alexei Filippov <alph@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61930}

Fixes LookupNameOfBytecodeHandler so it actually returns non-nullptr
values with embedded builtins enabled. Also now correctly handles wide
and extra-wide bytecodes and always works regardless of whether
ENABLE_DISASSEMBLER is set.

Bug: v8:9215
Change-Id: I787134f2145d02daaf5b50ecb6c174dfc129a4fe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1635890Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61929}

Bug: v8:9247
Change-Id: Id6860e7b0f932990ac3cda39e369b0809e4f6a2b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632072Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61928}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/c93f946..19aa2f3

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/5db62d3..7760fd2

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/b97d193..9779b14

Rolling v8/third_party/googletest/src: https://chromium.googlesource.com/external/github.com/google/googletest/+log/f71fb4f..f5edb4f

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/64bb071..65e8ecf

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

Change-Id: Iafa053df8859ac7040338af3f6655c5c15b2a007
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1636487Reviewed-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@{#61927}

port https://crrev.com/c/1627539 to mips.

Change-Id: I18029495b6793fa1b981e28505a7c42842dacc97
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634629Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Yu Yin <xwafish@gmail.com>
Cr-Commit-Position: refs/heads/master@{#61926}

Currently, Number.prototype.toString(radix) often fails to produce the
least significant bit for doubles near zero. For example, for the
minimum double, 5e-324, toString(2) produces "0". This means that a
user cannot reliably get the exact binary or hexdecimal value of a
double from JavaScript using toString.

This patch makes a slight amendment to the DoubleToRadixCString
function, so that doubles where the gap to the next double is 5e-324
(i.e. doubles less than 2**-1021), are represented exactly in binary and
other power-of-two bases, and close to exactly otherwise. It results
in Number.prototype.toString producing the correct binary value for all
doubles.

R=jkummerow@chromium.org, mathias@chromium.org, yangguo@chromium.org

Bug: v8:9294
Change-Id: I71506149b7c4c0eac8c38675a1ee15fb4f36f9ef
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1631601
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61925}

Speed up Intl.PluralRules constructor x3.4

$python -u tools/run_perf.py --binary-override-path  \
   out/x64.release/d8 --filter "JSTests/Intl" \
   test/js-perf-test/JSTests5.json

Score for NewIntlPluralRules
BEFORE  550  581  576
AFTER  1856 1978 1996


Bug: v8:9300
Change-Id: I76b4290aa433b1049e3ee770d391b86e468e967d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1630134
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61924}

New revision: e8ba1a7665bdcd8336915d5ca4b390e0cf6b1f6f

Change-Id: I6a916f003a29b0b9436ad031bbd43eddfa189e63
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634938
Auto-Submit: Johannes Henkel <johannes@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61923}

Bug: chromium:966460
Change-Id: I418eab656510fe3f799f552e75be10140d25bcab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1625864Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#61922}

Port 157b9181

Original Commit Message:

    Port 878ccb33

    Original Commit Message:

        This CL was generated by an automatic clang AST rewriter using this
        matcher expression:

          callExpr(
            callee(
              cxxMethodDecl(
                hasName("operator->"),
                ofClass(isSameOrDerivedFrom("v8::internal::Object"))
              )
            ),
            argumentCountIs(1)
          )

        The "->" at the expression location was then rewritten to ".".

R=miladfar@ca.ibm.com, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I620c2104b649a75a01fd7a92dacadd652b23be7e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634931Reviewed-by: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#61921}

Port f5ab7d38

Port 65f3861e

Original Commit Message:

    In a new test suite: "wasm-api-tests", using a new binary "wasm_api_tests",
    powered by gtest/gmock (like unittests).
    Also fix a bunch of issues that these tests uncovered, mostly to ensure
    that the stack is walkable.

R=jkummerow@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I9ec54193216d1b2024ee9c4f8f6dbda34bbf4586
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632354Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#61920}

The newly introduced select-with-type instruction is only available when
anyref is enabled.

R=clemensh@chromium.org

Bug: chromium:967998
Change-Id: Idcb9ab447eedb93fe5374726da162ca1c79b3f16
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634927
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61919}

AccessCheckInfo is a struct which is initialized with undefined values
as placeholders. Update the definiton so that the verifier that could
run between allocation and setting a field is happy.

Bug: chromium:967433
Change-Id: I21b99645c01e109d7ba0b61a5366e1f66a7f98d5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634922Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61918}

ArrayBuffer objects have a larger maximal size than TypedArray objects.
The inspector TypedArray objects to preview ArrayBuffer objects; ensure
we don't exceed the maximal size here.

Bug: chromium:964663,v8:9308
Change-Id: Ia787ff87c799a3f2ca073e36cb54e57e86dacae9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634921
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61917}

According to the spec, in case where the property is non-configurable and
non-writable, the value passed to the set trap should be compared to the data.
Instead, the trap result was compared, because of the misleading name of the
CheckGetSetTrapResult parameter.

Regression was introduced in
https://chromium-review.googlesource.com/c/v8/v8/+/1604071

Bug: chromium:966450
Change-Id: I77501980475da3aeb4f6153321da39e6fc2e6bd9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632238
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61916}

TBR=machenbach@chromium.org
NOTRY=true

Change-Id: I1b095c0957f8cb4282bcd73993e2fd19631ffe86
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634925
Commit-Queue: Michael Hablich <hablich@chromium.org>
Reviewed-by: Michael Hablich <hablich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61915}

So far, calls to Wasm C/C++ API functions reused the call descriptors
of WasmImportWrappers, and the stack frame type of regular Wasm
functions. This CL cleans that up by introducing separate implementations
for both. No change in functionality or performance is expected.

Change-Id: I79301fa81da52283cc776ddf19d4712372f3a58b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1632235
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61914}

The proposal is changing accordingly, see
https://github.com/WebAssembly/reference-types/issues/36.

In our tests we were already using the new format implicitly, because
bulk-memory-operations are enabled by default. I noticed the missing
implementation when I executed spec tests with
--no-experimental-wasm-bulk-memory.

R=mstarzinger@chromium.org

Bug: v8:7581
Change-Id: I13aaba9a8d60e8542245aac7f0a072da1be357dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1631591Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61913}

The backtracking stack (which is actually a generic stack) used to be
statically sized. At 10k elements, it was fairly large, but still easy
to overflow on large subject strings. This CL changes it to a
std::vector-based implementation instead which grows on-demand.

Drive-by: Add braces to the BYTECODE cases to make clang-format
produce a nicer output.

Bug: v8:8776
Change-Id: If41a444fe3d05f6d5be1be019129788a86e6118b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1634914Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61912}