With this CL we do not spawn a FinishCompilationUnit foreground task for
every WebAssembly function we compile, but instead spawn one foreground
task which finishes all existing compilation units
(FinishCompilationUnits). A new FinishCompilationUnits task is spawned
whenever a compilation task sees that there in no FinishCompilationUnits
to finish its compilation unit.

In addition the FinishCompilationUnits task gets a time limit. Whenever
it is executed for longer than 1ms (this value is also used by the GC),
then the task stops and reschedules itself. Thereby we make sure that
we do not block the main thread for too long.

Change-Id: Ib4f2aed91c60f9c8952b6ba4dd7e5052301417a3
Reviewed-on: https://chromium-review.googlesource.com/508708
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45449}

BUG: v8:6211
Change-Id: Ief28872f6ce97ff326f9a86367f872e321b2612a
Bug: 
Reviewed-on: https://chromium-review.googlesource.com/508650
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45448}

R=danno@chromium.org
CC=sshruthi@chromium.org
TBR=verwaest@chromium.org,bmeurer@chromium.org,yangguo@chromium.org,rossberg@chromium.org

Change-Id: I32e09193fa6e847ac3336eab62b6d85c46d71164
Reviewed-on: https://chromium-review.googlesource.com/509508
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45447}

Only FullCodegen code ever gets flushed by code flushing. Since we are
deprecating the old pipeline, the added complexity introduced by code
flushing is no longer worth it. This CL removes it (but keeps code aging,
which is used to unlink SFIs from the compilation cache).

BUG=v8:6389,v8:6379,v8:6409

Change-Id: I90de113a101f86dbeaaf0511c61a090ef12aa365
Reviewed-on: https://chromium-review.googlesource.com/507388
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45446}

Revert of [csa] Add assertions to CSA (patchset #14 id:260001 of https://codereview.chromium.org/2847923003/ )

Reason for revert:
Linux-nosnap failures:

https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/13282

Original issue's description:
> [csa] Add assertions to CSA
>
> This adds a bunch of assertions to CSA, mostly about documenting and checking
> parameter types.
>
> Drive-by-change: Removed unused function.
>
> BUG=v8:6325
>
> Review-Url: https://codereview.chromium.org/2847923003
> Cr-Original-Commit-Position: refs/heads/master@{#45398}
> Committed: https://chromium.googlesource.com/v8/v8/+/b14a981496ad1f841683479d2f9188dfa2d6b4bd
> Review-Url: https://codereview.chromium.org/2847923003
> Cr-Commit-Position: refs/heads/master@{#45443}
> Committed: https://chromium.googlesource.com/v8/v8/+/62b0de1ef53816d6dae3fa519a846f942b701dda

TBR=cbruni@chromium.org,ishell@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6325

Review-Url: https://codereview.chromium.org/2893253002
Cr-Commit-Position: refs/heads/master@{#45445}

An oversight in Friday's CL. Thx to neis@chromium.org for the tip!

BUG=v8:6351
TBR=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2893223002
Cr-Commit-Position: refs/heads/master@{#45444}

This adds a bunch of assertions to CSA, mostly about documenting and checking
parameter types.

Drive-by-change: Removed unused function.

BUG=v8:6325

Review-Url: https://codereview.chromium.org/2847923003
Cr-Original-Commit-Position: refs/heads/master@{#45398}
Committed: https://chromium.googlesource.com/v8/v8/+/b14a981496ad1f841683479d2f9188dfa2d6b4bd
Review-Url: https://codereview.chromium.org/2847923003
Cr-Commit-Position: refs/heads/master@{#45443}

BUG=

Review-Url: https://codereview.chromium.org/2892153003
Cr-Commit-Position: refs/heads/master@{#45442}

BUG=none

Review-Url: https://codereview.chromium.org/2894773003
Cr-Commit-Position: refs/heads/master@{#45441}

Currently SIMD integer comparison ops are implemented using Lt/Le, this is
sub-optimal on Intel, because all compares are done using pcmpgt(d/w/b) that
clobber the destination register, and will need additional instructions to
when using Lt/Le as the base implementation. This CL proposes moving to Gt/Ge
as the underlying implementation as this will only require swapping operands
on MIPS and is consistent with x86/ARM instructions.

BUG=v8:6020

R=bbudge@chromium.org, bmeurer@chromium.org, bradnelson@chromium.org

Review-Url: https://codereview.chromium.org/2874403002
Cr-Commit-Position: refs/heads/master@{#45440}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/c11a9f7..1caf3a6

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

Change-Id: I9f6bc987a022b085a0baaf1eb67ea23fa5513794
Reviewed-on: https://chromium-review.googlesource.com/509232Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45439}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/8da5cdf..c11a9f7

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/b1c6aa7..08a6e0a

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/ba46613..05f3060

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

Change-Id: I4e2d640fd4963ca190325ffeb1dce6a71e4346e5
Reviewed-on: https://chromium-review.googlesource.com/509174Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45438}

Bug:v8:6055

Change-Id: Ifeac048e5bee2d1782cdaaabe9f5257129b7be0e
Reviewed-on: https://chromium-review.googlesource.com/508528Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Loo Rong Jie <loorongjie@gmail.com>
Cr-Commit-Position: refs/heads/master@{#45437}

The WebAssembly code now uses these new APIs to allocate memory with guard
regions. Guarded array buffers are no longer always external, which eliminates
a lot of special cases around WebAssembly memory.

Bug: chromium:720302
Change-Id: I355b74ac30a05a18c8b363bd256d57458742849f
Reviewed-on: https://chromium-review.googlesource.com/505715Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45436}

All targets (at least on sanitizer builds) unconditionally depend
on //build/config/sanitizers:deps.

It is necessary for bug 593874 that all targets now also depend
on //buildtools/third_party/libc++:libcxx_proxy.  This requires
adding a new "global dependency": //build/config:exe_and_shlib_deps.

This CL updates references to sanitizers:deps to instead refer to
//build/config:exe_and_shlib_deps.

BUG=chromium:723069
R=bradnelson@chromium.org

Review-Url: https://codereview.chromium.org/2894013003
Cr-Commit-Position: refs/heads/master@{#45435}

GeneratorClose is pretty simple, we can handle it in the interpreter.

BUG=v8:6351

Review-Url: https://codereview.chromium.org/2891353002
Cr-Commit-Position: refs/heads/master@{#45434}

This CL enforces passing an AssemblerDebugInfo object to Bind, most convently
acheived by the BIND macro.

Change-Id: I092714f10803f529d01d2fe716b96275b2bee806
Reviewed-on: https://chromium-review.googlesource.com/508729Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45433}

Change-Id: Id3b29978232ab7838224d6a38da345915fa00f22
Reviewed-on: https://chromium-review.googlesource.com/507307
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45432}

Bug: chromium:720477
Change-Id: I49af460d06f045731d847d68b7276edae72d95a4
Reviewed-on: https://chromium-review.googlesource.com/509690Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45431}

Call the templated handle(T) function instead of
Handle<T>() as it's slighly simpler to read.

Bug: 
Change-Id: I7d8dc6ffae1dc1c609cd6bce230adbe62aaf451b
Reviewed-on: https://chromium-review.googlesource.com/509568
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45430}

This fixes crashes during validation when trying to construct modules
with excessively large function tables. The {WasmModuleBuilder} now
gracefully checks against existing WebAssembly implementation limits.

R=clemensh@chromium.org
TEST=mjsunit/regress/regress-crbug-715455
BUG=chromium:715455

Change-Id: Ia9738cb0b49a1eb4caf073b75301c0303f295699
Reviewed-on: https://chromium-review.googlesource.com/509530
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45429}

In the current implementation the decision to inline polymorphic function
calls applies to all functions. Either we inline all of them or none of
them. Also, we decide to inline if the size of one of function is less
than the FLAG_max_inlined_nodes.

This cl changes it to a decision on individual functions. In the case of
polymorphic calls, we might inline some of the functions and not inline
others.

Bug: 
Change-Id: I2f4049b5e55445b4858b260d289c96090c6aaa74
Reviewed-on: https://chromium-review.googlesource.com/508668
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45428}

On map change of an object this patch checks that
- either GC was notified about this change,
- or the change leaves the slot set of the object the same.

BUG=chromium:694255

Review-Url: https://codereview.chromium.org/2886223002
Cr-Commit-Position: refs/heads/master@{#45427}

This is in order to avoid triggering the generation of deopt entries
later during code assembly.

R=jarin@chromium.org

Bug: v8:6048
Change-Id: I51fb508cfc5d715b6a5b2fded90b19c9f21d4d9f
Reviewed-on: https://chromium-review.googlesource.com/508789
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45426}

Task creation often dominates the actual work that is being done.

Bug: chromium:722989
Change-Id: Ibdd6ffa6f3154f17dc6ccbd30475710b97e802e7
Reviewed-on: https://chromium-review.googlesource.com/508783Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45425}

Bug: chromium:723802
Change-Id: I8f23d016a5aaf785fcd27cd139a196a148a37069
Reviewed-on: https://chromium-review.googlesource.com/508712
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45424}

[builtins] Enable %TypedArray%.prototype.{some,every,reduce,reduceRight,map} CSA builtins by default

R=danno@chromium.org

Change-Id: I3365642b2682c09d745b7bcc9f983179604e7c3a
Reviewed-on: https://chromium-review.googlesource.com/509549
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45423}

Currently only relies on private stacks of segments, i.e., doesn't steal
anything, yet.

Bug: chromium:651354
Change-Id: Icedad3e3169b61afe988a1ece10f73f3a973bdb2
Reviewed-on: https://chromium-review.googlesource.com/508351
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45422}

This adds reporting of linking failures (i.e. module instantiation)
similar to the existing reporting for validation failures. Note that
the messages in question are deterministic and can be tested.

R=clemensh@chromium.org

Change-Id: Ibecebefb86f1d878f626702c05fd0cb21189dc2a
Reviewed-on: https://chromium-review.googlesource.com/507488
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45421}

Revert of Add DEPS.chromium for recursive DEPS tracking. (patchset #1 id:1 of https://codereview.chromium.org/2880293002/ )

Reason for revert:
Going a different way with this, as Chromium don't want the additional files.

Original issue's description:
> Add DEPS.chromium for recursive DEPS tracking.
>
> DEPS.chromium allows the Chromium build system's DEPS to recurse into V8's own
> dependencies. Initially, this is populated with some tests files for the ARM64
> simulator.
>
> BUG=chromium:718439
>
> Review-Url: https://codereview.chromium.org/2880293002
> Cr-Commit-Position: refs/heads/master@{#45310}
> Committed: https://chromium.googlesource.com/v8/v8/+/f8a6c6c48e79ef4267d03c80aa768e8362341e4a

TBR=machenbach@chromium.org,bmeurer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:718439

Review-Url: https://codereview.chromium.org/2891323002
Cr-Commit-Position: refs/heads/master@{#45420}

This simplifies the growing strategy used in {ZoneBuffer} and also tunes
the initial sizes used for various instances of these buffers. Note that
such a {ZoneBuffer} is used for entire modules and individual function
bodies.

R=clemensh@chromium.org

Change-Id: I99a0898589984e1830c681845fabb0ed5f8317ab
Reviewed-on: https://chromium-review.googlesource.com/508711
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45419}

We can avoid some runtime calls by implementing intrinsics.

BUG=

Review-Url: https://codereview.chromium.org/2889973002
Cr-Commit-Position: refs/heads/master@{#45418}

In a recent CL I moved the corpus of the wasm fuzzer and of the
wasm-asmjs fuzzer to a different directory
(wasm_corpus and wasm_asmjs_corpus) so that the corpus is not executed
on the try-bots. With this CL I remove the old corpus from the
.gitignore file.

In addition I removed the hooks for wasm_corpus and
wasm_asmjs_corpus from the V8 DEPS file, because in a V8 checkout
they are not used anyway.

I also added code to the test runner to delete all *.wasm files
from the directories test/fuzzer/wasm and test/fuzzer/wasm_asmjs.
This code should be removed in a week, but it will help my coworkers
to cleanup their V8 checkout.



R=bradnelson@chromium.org
CC=machenbach@chromium.org

Change-Id: I9fdf9d77b71b133f84f7e744763d65fdf127d624
Reviewed-on: https://chromium-review.googlesource.com/505614
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45417}

NOTRY=true
TBR=franzih@chromium.org

Bug: v8:6154
Change-Id: Ief1e1acb353ba1c857616c32607979aec462207a
Reviewed-on: https://chromium-review.googlesource.com/509488Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45416}

In crrev.com/2856103002 sentinel frequency values were introduced, using
NaN as the sentinel. However the comparison function was not *fully*
updated to support these - comparing two NaNs would give ambiguous
results. This caused test failures when building with VS 2017, probably
because of subtle changes in the arrangement of nodes in the tree.

This change uses the the node ID to break ties. An alternative would be
to use a non-NaN sentinel value.

R=bmeurer@chromium.org
BUG=chromium:722480

Review-Url: https://codereview.chromium.org/2894433004
Cr-Commit-Position: refs/heads/master@{#45415}

Introduce a flag --max-inlined-nodes-absolute that is used to limit the
number of nodes that we inline even in the presence of small function
inlining, so that TurboFan graphs don't grow arbitrary large.

BUG=chromium:724084,v8:6395,v8:6278,v8:6344,v8:6394
TBR=mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/2894523005
Cr-Commit-Position: refs/heads/master@{#45414}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/ce01161..8da5cdf

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/d76621c..b1c6aa7

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/fd2abab..c844075

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/162cac4..ba46613

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

Change-Id: I59daef22f238d257f577dc1617aa5401c952e708
Reviewed-on: https://chromium-review.googlesource.com/509229Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45413}

This refactoring makes it easier to write advanced tests and
gives full control over what's happening to the test code.
It also forces description for every test.

BUG=none

Review-Url: https://codereview.chromium.org/2891213002
Cr-Commit-Position: refs/heads/master@{#45412}

As per spec, (https://github.com/WebAssembly/design/pull/1068), we
don't have compile/instantiate overloads anymore, instead, we
have explicitly named members.

This change introduces the new APIs, implements instantiateStreaming
based on compileStreaming, and uses the existing embedder mechanism.
It does not yet remove the functionality from compile/instantiate -
we do that after we adopt the new APIs on the blink side.

Also, it temporarily handles exceptions on the v8 side, which is also
something we'll move to the blink side.

Bug: 
Change-Id: I77673b1c0d395dfcf13b2f25464fd5dfd99c8d82
Reviewed-on: https://chromium-review.googlesource.com/508852
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45411}

Port 73d21080

Original Commit Message:

    Now that the optimized code hangs off the feedback vector, it is possible
    to check whether a function has optimized code available every time it's
    called in the interpreter entry trampoline. If optimized code exists, the
    interpreter entry trampoline 'self-heals' the closure to point to the
    optimized code and links the closure into the optimized code list.

R=rmcilroy@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:6246
LOG=N

Review-Url: https://codereview.chromium.org/2897483002
Cr-Commit-Position: refs/heads/master@{#45410}