Currently try bots [1] are failing on these tests and no CLs can be landed to V8. It looks like these tests were added recently.
Based on https://bugs.chromium.org/p/v8/issues/detail?id=6015, it's known issue in V8 implementation, so mark them as needs investigation.

[1] https://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel_ng_triggered/builds/16490/steps/Test262%20-%20no%20variants

BUG=v8:6015,v8:6016
TBR=adamk@chromium.org,littledan@chromium.org
NOTREECHECKS=true

Review-Url: https://codereview.chromium.org/2717773002
Cr-Commit-Position: refs/heads/master@{#43423}

BUG=chromium:651354

Change-Id: Ia8511723b17936b78b33ea685704237c100648e1
Reviewed-on: https://chromium-review.googlesource.com/439285
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43422}

BUG=

R=bjaideep@ca.ibm.com, jyan@ca.ibm.com, joransiu@ca.ibm.com

Review-Url: https://codereview.chromium.org/2710153002
Cr-Commit-Position: refs/heads/master@{#43421}

We don't call any of v8::Debug methods in src/inspector codebase and should use debug-interface.h instead.

BUG=none
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2710243002
Cr-Original-Commit-Position: refs/heads/master@{#43398}
Committed: https://chromium.googlesource.com/v8/v8/+/838b1a8841aba0c421b413c01b0fbd3c024c2249
Review-Url: https://codereview.chromium.org/2710243002
Cr-Commit-Position: refs/heads/master@{#43420}

Introduce a new Object to allow GetIterator("async") to function when the
iterable does not have a Symbol.asyncIterator method.

This patch has been split out from https://codereview.chromium.org/2622833002/
and incorporates test cases.

BUG=v8:5855, v8:4483
R=jgruber@chromium.org, rmcilroy@chromium.org, neis@chromium.org
TBR=hpayer@chromium.org, bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2645313003
Cr-Commit-Position: refs/heads/master@{#43419}

Now that no harmony-flagged features are implemented in experimental
JS, most of this is simply dead code.

As PostExperimentals() is no longer needed, I also removed the use of
Import() in the debug context, allowing the deletion of PostDebug()
along with PostExperimentals(); cleanup code is moved to the
end of PostNatives.

Also gets rid of some longer-dead code in prologue.js related to
TypedArrays, and some duplicate code for setting up SharedArrayBuffer
builtins.

Review-Url: https://codereview.chromium.org/2705293004
Cr-Commit-Position: refs/heads/master@{#43418}

The DescriptorInterceptor should intercept all
Object.getOwnPropertyDescriptor calls. This CL fixes
the interceptor's behavior if the iterator state is
ACCESS_CHECK.

BUG=

Review-Url: https://codereview.chromium.org/2707263002
Cr-Commit-Position: refs/heads/master@{#43417}

Marking it as callable makes typeof return 'function' instead of
'object' when invoked on a remote context or object.

BUG=chromium:527190

Review-Url: https://codereview.chromium.org/2715593002
Cr-Commit-Position: refs/heads/master@{#43416}

If the RHS is 0 and we have Smi feedback, speculate that the result (the LHS)
will continue to be in the Unsigned31 range.  This helps us avoid converting
the result to double when merging with Signed32.

R=jarin@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2709423002
Cr-Commit-Position: refs/heads/master@{#43415}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2383361..eefc9cc

Rolling v8/test/wasm-js: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/1e5c9c4..ac398e4

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/56214f6..794fff6

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/9982bd3..4e912d5

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Change-Id: I5ef9779b8d9b238e0372ac48ec06740c5daba6a6
Reviewed-on: https://chromium-review.googlesource.com/446816Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43414}

This is a refactoring CL in preparation for implementing asynchronous compilation.
It moves all the compilation-related functionality to a helper class which will
make it easier to split into background and foreground tasks which is needed
for concurrent/synchronous execution of compilation.

R=clemensh@chromium.org,ahaas@chromium.org
BUG=v8:6003

Review-Url: https://codereview.chromium.org/2710603006
Cr-Commit-Position: refs/heads/master@{#43413}

Adds a perf test for constructing a TypedArray from a regular array,
and from a pre-made ArrayBuffer. Runs both new tests with default and
future configurations for comparison.

BUG=v8:5977

Change-Id: Idd132ca879702c54b2947a0e57ed8fe782f2767f
Reviewed-on: https://chromium-review.googlesource.com/446342Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43412}

This is also needed so that PreParser doesn't need to gather more data for arrow
function params in order to create the uninteresting varblock scopes matching
the scopes created in Parser::BuildParameterInitializationBlock.

This cancels the changes in https://chromium-review.googlesource.com/c/444747
which make PreParser create uninteresting scopes for the normal (non-arrow)
function "eval in default param" case.

R=vogelheim@chromium.org
BUG=v8:5516

Change-Id: I8957ac0796d8738c63492f7928bca6f00e4b4241
Reviewed-on: https://chromium-review.googlesource.com/446339Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43411}

This is a preliminary cleanup necessary for the actual fix of the associated issue.

BUG=chromium:688734

Change-Id: Iecd39ed4cef34c6cc5d9652c5569e048f0db46af
Reviewed-on: https://chromium-review.googlesource.com/446341
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43410}

The only remaining allowed occurence of a context is in WASM_TO_JS
code, which is regenerated for each instance.
This CL removes all the rest, to avoid subtle bugs where we might
forget to patch it. By renaming the BuildCallToRuntime method, we make
sure that noone accidentially calls the version which embeds a context.
For consistency, I even remove it from the WasmRunInterpreter stub,
which is never reused for new instantiations.

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2708743003
Cr-Commit-Position: refs/heads/master@{#43409}

In instruction selector, in the reduction of Word64And(Word64Shr(val,0),
0xFFF...) to EXT instruction, the case where shift value is 0 and mask is
0xFFFFFFFFFFFFFFFF was not supported. We now generate NOP for this case
since no bit extraction is necessary.
We implement the same behavior for MIPS32 even though there are no tests
that are failing.

TEST=cctest/test-run-machops/Regression5951
BUG=

Review-Url: https://codereview.chromium.org/2718433002
Cr-Commit-Position: refs/heads/master@{#43408}

We can make Heap::UpdateAllocationSite cheaper for TurboFan, because
there's no need to check for allocation mementos on Strings in case of
the TurboFan pipeline.

R=mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/2710303002
Cr-Commit-Position: refs/heads/master@{#43407}

TBR=kozyatinskiy@chromium.org
BUG=chromium:695631

Review-Url: https://codereview.chromium.org/2718543005
Cr-Commit-Position: refs/heads/master@{#43406}

This is used for internal security checks in eval(). Expose this to
enable the embedder to implement similar security checks.

R=yangguo@chromium.org
BUG=

Change-Id: I10819713b19527622de5ffffac313d126a887c05
Reviewed-on: https://chromium-review.googlesource.com/446106Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43405}

Revert of [inspector] removed unused #include "include/v8-debug.h" (patchset #2 id:20001 of https://codereview.chromium.org/2710243002/ )

Reason for revert:
breaks presubmit on CI which runs checkdeps

Original issue's description:
> [inspector] removed unused #include "include/v8-debug.h"
>
> We don't call any of v8::Debug methods in src/inspector codebase and should use debug-interface.h instead.
>
> BUG=none
> R=dgozman@chromium.org
>
> Review-Url: https://codereview.chromium.org/2710243002
> Cr-Commit-Position: refs/heads/master@{#43398}
> Committed: https://chromium.googlesource.com/v8/v8/+/838b1a8841aba0c421b413c01b0fbd3c024c2249

TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Review-Url: https://codereview.chromium.org/2719433002
Cr-Commit-Position: refs/heads/master@{#43404}

BUG=chromium:695777
NOTRY=true
TBR=tandrii@chromium.org

Review-Url: https://codereview.chromium.org/2714893003 .
Cr-Commit-Position: refs/heads/master@{#43403}

Enable using BaseWithIndexAndDisplacement addressing mode for an address
used by multiple load/stores. It can reduce one instruction to calculate
the address and one register to store the address.

BUG=

Review-Url: https://codereview.chromium.org/2620293004
Cr-Commit-Position: refs/heads/master@{#43402}

For a + b, where both a and b are known strings at compile
time, and the combined length of a and b doesn't overflow
the maximum allowed string length, we can constant-fold the
string concatenation during compilation.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2713093003
Cr-Commit-Position: refs/heads/master@{#43401}

With inline breakpoints DevTools are ready for break position aligned breakpoints instead of statement aligned.

BUG=chromium:695236
R=dgozman@chromium.org,yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2709263002
Cr-Original-Commit-Position: refs/heads/master@{#43385}
Committed: https://chromium.googlesource.com/v8/v8/+/2fed7a0090b316d77ebbf509d2cc98edd4b6ccf0
Review-Url: https://codereview.chromium.org/2709263002
Cr-Commit-Position: refs/heads/master@{#43400}

BUG=v8:4203
R=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2715743004
Cr-Commit-Position: refs/heads/master@{#43399}

We don't call any of v8::Debug methods in src/inspector codebase and should use debug-interface.h instead.

BUG=none
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2710243002
Cr-Commit-Position: refs/heads/master@{#43398}

Adding a full run of checkdeps to tools/presubmit.py so that we keep
checkdeps green. PRESUBMIT.py checks only incremental changes.

Temporarily disabling a check rule that's broker in the inspector,
pending owners fix.

BUG=
R=machenbach@chromium.org,dgozman@chromium.org,eholk@chromium.org

Review-Url: https://codereview.chromium.org/2705333005
Cr-Commit-Position: refs/heads/master@{#43397}

This reverts commit 8307ab70.

Reason for revert: Breaks TSAN

Original change's description:
> [Counters] Add HistorgramTimers for optimized compile.
> 
> Will be used for UMA to track time spent optimizing code in the wild.
> 
> Change-Id: Ibc01540552eac4cb9224f1cb6cc11a55aae5834d
> Reviewed-on: https://chromium-review.googlesource.com/444345
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#43374}

TBR=rmcilroy@chromium.org,mvstanton@chromium.org,machenbach@chromium.org,hablich@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I1cfc2ee599b9ba0132e69c8a61b21ff32c74f68e
Reviewed-on: https://chromium-review.googlesource.com/446360Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43396}

Revert of [inspector] use BREAK_POSITION_ALIGNED for breakpoints (patchset #7 id:120001 of https://codereview.chromium.org/2709263002/ )

Reason for revert:
breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/13747

which blocks rolling. See also:
https://github.com/v8/v8/wiki/Blink-layout-tests

Original issue's description:
> [inspector] use BREAK_POSITION_ALIGNED for breakpoints
>
> With inline breakpoints DevTools are ready for break position aligned breakpoints instead of statement aligned.
>
> BUG=chromium:695236
> R=dgozman@chromium.org,yangguo@chromium.org
>
> Review-Url: https://codereview.chromium.org/2709263002
> Cr-Commit-Position: refs/heads/master@{#43385}
> Committed: https://chromium.googlesource.com/v8/v8/+/2fed7a0090b316d77ebbf509d2cc98edd4b6ccf0

TBR=dgozman@chromium.org,yangguo@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:695236

Review-Url: https://codereview.chromium.org/2709313003
Cr-Commit-Position: refs/heads/master@{#43395}

The source code of those functions is simple a ternary operator, and
the test seems to have been designed as a "regression" test for the
previous implementation (which used a macro, and thus evaluated its
arguments multiple times).

I don't think the test is worth the weight of supporting importing
JS natives from tests.

This patch removes the last test that depends on JS natives.

R=littledan@chromium.org

Review-Url: https://codereview.chromium.org/2711833002
Cr-Commit-Position: refs/heads/master@{#43394}

The test itself was for an issue that's handled statically since
https://codereview.chromium.org/1302313013 (we were missing some
instance types in a switch statement).

This leaves us with only a single test that depends on the JS
native import system.

R=littledan@chromium.org

Review-Url: https://codereview.chromium.org/2707133005
Cr-Commit-Position: refs/heads/master@{#43393}

BUG=v8:1569

Review-Url: https://codereview.chromium.org/2711123002
Cr-Commit-Position: refs/heads/master@{#43392}

This changes the bytecode decoder such that --print-bytecode will print

    ... CallRuntime [GeneratorGetResumeMode] ...
    ... InvokeIntrinsic [CreateIterResultObject] ...

instead of

    ... CallRuntime [762] ...
    ... InvokeIntrinsic [2] ...

The printing of CallJSRuntime remains unchanged.

R=gsathya@chromium.org, rmcilroy@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2712943002
Cr-Commit-Position: refs/heads/master@{#43391}

The entry points to the deserializer are responsible for ensuring that an
exception is pending by the time they return. Some failures throw exceptions
themselves, while others (like errors in the format) are exceptions caused by
the deserializer, not coming from the runtime.

Like the non-legacy path, a default deserialization exception should be thrown
in such cases.

BUG=chromium:693411

Review-Url: https://codereview.chromium.org/2712713002
Cr-Commit-Position: refs/heads/master@{#43390}

Non-simple parameters are only disallowed when a function declares itself
strict, but they're otherwise ok in strict mode.

Enabling these tests will expose more problems when scope data for arrow
functions is tested (in a future CL).

BUG=v8:5516
R=vogelheim@chromium.org

Change-Id: I839ad37d46305975a56aff20e8ca70505c16bf1d
Reviewed-on: https://chromium-review.googlesource.com/446497Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43389}

BUG=v8:5294

Change-Id: If45f25aae8de526027b7851cb4efe0ccf4a7c4b1
Reviewed-on: https://chromium-review.googlesource.com/444226
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43388}

Fix crashes in two tests cctest/test-wasm-interpreter-entry/TestArgumentPassing_AllTypes and
cctest/test-wasm-interpreter-entry/TestArgumentPassing_float_double related to accessing
double value through unaligned pointer. This issue is present on those architectures
that do not support unaligned access.

TEST=cctest/test-wasm-interpreter-entry/TestArgumentPassing_AllTypes,
     cctest/test-wasm-interpreter-entry/TestArgumentPassing_float_double
BUG=

Review-Url: https://codereview.chromium.org/2705253003
Cr-Commit-Position: refs/heads/master@{#43387}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/8b6a679..2383361

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/buildtools/+log/a7cc7a3..7e53759

Rolling v8/test/wasm-js: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/bfb1fc4..1e5c9c4

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/d9036c9..56214f6

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/9cd2828..450be73

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/8da96ea..9982bd3

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Change-Id: Iaedc4e09880836813a74a374f912e891c1769dc1
Reviewed-on: https://chromium-review.googlesource.com/446597Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43386}

With inline breakpoints DevTools are ready for break position aligned breakpoints instead of statement aligned.

BUG=chromium:695236
R=dgozman@chromium.org,yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2709263002
Cr-Commit-Position: refs/heads/master@{#43385}

This implements the proposal at
https://github.com/tc39/proposal-template-literal-revision
staged behind a flag --harmony-template-escapes. The proposal allows
invalid octal, unicode, and hexadecimal escape sequences to appear in
tagged template literals, instead of being a syntax error. These have
a 'cooked' value of 'undefined', but are still accessible through the
'raw' property.

BUG=v8:5546

Review-Url: https://codereview.chromium.org/2665513002
Cr-Commit-Position: refs/heads/master@{#43384}