https://codereview.chromium.org/2253973003 is landed. The V8
macro can be changed accordingly now and the test can be enabled
again.

BUG=647986

Review-Url: https://codereview.chromium.org/2360083005
Cr-Commit-Position: refs/heads/master@{#39636}

The Wasm got big-endian support with d3f3f6c8. The
tests are now passing.

BUG=

Review-Url: https://codereview.chromium.org/2359143002
Cr-Commit-Position: refs/heads/master@{#39635}

BUG=

Review-Url: https://codereview.chromium.org/2355373002
Cr-Commit-Position: refs/heads/master@{#39634}

BUG=v8:5409

Review-Url: https://codereview.chromium.org/2348303002
Cr-Commit-Position: refs/heads/master@{#39633}

Revert of [heap] Reland Concurrently free empty typed slot set chunks. (patchset #2 id:20001 of https://codereview.chromium.org/2365603002/ )

Reason for revert:
Leaks and TSAN:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20ASAN/builds/15441
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/11867

Original issue's description:
> [heap] Reland Concurrently free empty typed slot set chunks.
>
> BUG=chromium:648568
>
> Committed: https://crrev.com/ec3835751d678c0b4a3fda47d11ffa107cd27e23
> Cr-Commit-Position: refs/heads/master@{#39630}

TBR=ulan@chromium.org,hpayer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2364603002
Cr-Commit-Position: refs/heads/master@{#39632}

BUG=v8:5409

Review-Url: https://codereview.chromium.org/2335343007
Cr-Commit-Position: refs/heads/master@{#39631}

BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2365603002
Cr-Commit-Position: refs/heads/master@{#39630}

WasmModule::Instantiate can return an empty handle if it is not possible
to instantiate the module. With this change the wasm-module-runner does
not assume anymore that WasmModule::Instantiate produces a valid handle.

BUG=chromium:648078
R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2365493003
Cr-Commit-Position: refs/heads/master@{#39629}

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2362663002
Cr-Commit-Position: refs/heads/master@{#39628}

We can't assume that there's no entered context during microtask
execution. We also can't assume that we'll never enter an context during
microtask execution either.

We can however assume that we don't execute microtasks recursively, so
remembering the length of the entered context stack is enough to decide
which context to use.

BUG=chromium:635769
R=verwaest@chromium.org

Review-Url: https://codereview.chromium.org/2350933007
Cr-Commit-Position: refs/heads/master@{#39627}

BUG=chromium:648583
NOTRY=true

Review-Url: https://codereview.chromium.org/2365573002
Cr-Commit-Position: refs/heads/master@{#39626}

The hash in the crash message is necessary to keep cluster fuzz from
grouping all result mismatches.

R=titzer@chromium.org, mmoroz@chromium.org

Review-Url: https://codereview.chromium.org/2363663002
Cr-Commit-Position: refs/heads/master@{#39625}

BUG=chromium:648973,chromium:648568

Review-Url: https://codereview.chromium.org/2360233002
Cr-Commit-Position: refs/heads/master@{#39624}

This reverts commit b42ecda5.

That commit introduced a allocator field to hashmap, which indirectly
added a field to Scopes, where the field, effectively storing a Zone, is
unnecessary because the Zone can be accessed in other ways.

Review-Url: https://codereview.chromium.org/2351393003
Cr-Commit-Position: refs/heads/master@{#39623}

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2361793002
Cr-Commit-Position: refs/heads/master@{#39622}

BUG=

Review-Url: https://codereview.chromium.org/2355253002
Cr-Commit-Position: refs/heads/master@{#39621}

Generate TBZ/TBNZ for certain comparisons against zero. E.g. instead of:

    cmp w0, 0x0
    b.lt/ge <addr>

we can generate:

    tbnz/tbz w0, 31, <addr>

BUG=

Review-Url: https://codereview.chromium.org/2359723004
Cr-Commit-Position: refs/heads/master@{#39620}

If a JSCallFunction node doesn't have any callee information, either
from feedback taken on input nodes, i.e. on property loads, or from
the CallIC, we insert a soft deoptimization exit instead.

R=jarin@chromium.org
BUG=v8:5267

Review-Url: https://codereview.chromium.org/2361773002
Cr-Commit-Position: refs/heads/master@{#39619}

An AtomicStore was used as an input to SmiTag.

R=jgruber@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2360993002
Cr-Commit-Position: refs/heads/master@{#39618}

The handlers cleanup will be done in a follow-up CL.

BUG=v8:5407

Review-Url: https://codereview.chromium.org/2357163003
Cr-Commit-Position: refs/heads/master@{#39617}

Port for VisitFloat32Add, VisitFloat64Add, VisitFloat32Sub and
VisitFloat64Sub in InstructionSelector.

TEST=unittests/InstructionSelectorTest.Float32AddWithFloat32Mul,
     unittests/InstructionSelectorTest.Float64AddWithFloat64Mul,
     unittests/InstructionSelectorTest.Float32SubWithFloat32Mul,
     unittests/InstructionSelectorTest.Float64SubWithFloat64Mul
BUG=

Review-Url: https://codereview.chromium.org/2341303002
Cr-Commit-Position: refs/heads/master@{#39616}

try_perf.py knows now of the "unity" benchmark suite

NOTRY=true

Review-Url: https://codereview.chromium.org/2358873002
Cr-Commit-Position: refs/heads/master@{#39615}

This makes sure cycles in the object states graph are detected early by
escape analysis instead of late in the scheduler. This is mainly done
for improved debuggability.

R=bmeurer@chromium.org
BUG=chromium:613923

Review-Url: https://codereview.chromium.org/2354263002
Cr-Commit-Position: refs/heads/master@{#39614}

BUG=v8:5407

Review-Url: https://codereview.chromium.org/2353303002
Cr-Commit-Position: refs/heads/master@{#39613}

Revert of [Interpreter] Optimize BytecodeArrayBuilder and BytecodeArrayWriter. (patchset #6 id:200001 of https://codereview.chromium.org/2351763002/ )

Reason for revert:
Prime suspect for roll blocker: https://codereview.chromium.org/2362503002/

Original issue's description:
> [Interpreter] Optimize BytecodeArrayBuilder and BytecodeArrayWriter.
>
> This CL optimizes the code in BytecodeArrayBuilder and
> BytecodeArrayWriter by making the following main changes:
>
>  - Move operand scale calculation out of BytecodeArrayWriter to the
> BytecodeNode constructor, where the decision on which operands are
> scalable can generally be statically decided by the compiler.
>  - Move the maximum register calculation out of BytecodeArrayWriter
> and into BytecodeRegisterOptimizer (which is the only place outside
> BytecodeGenerator which updates which registers are used). This
> avoids the BytecodeArrayWriter needing to know the operand types
> of a node as it writes it.
>  - Modify EmitBytecodes to use individual push_backs rather than
> building a buffer and calling insert, since this turns out to be faster.
>  - Initialize BytecodeArrayWriter's bytecode vector by reserving 512
> bytes,
>  - Make common functions in Bytecodes constexpr so that they
> can be statically calculated by the compiler.
>  - Move common functions and constructors in Bytecodes and
> BytecodeNode to the header so that they can be inlined.
>  - Change large static switch statements in Bytecodes to const array
> lookups, and move to the header to allow inlining.
>
> I also took the opportunity to remove a number of unused helper
> functions, and rework some others for consistency.
>
> This reduces the percentage of time spent in making BytecodeArrays
>  in  CodeLoad from ~15% to ~11% according to perf. The
> CoadLoad score increase by around 2%.
>
> BUG=v8:4280
>
> Committed: https://crrev.com/b11a8b4d41bf09d6b3d6cf214fe3fb61faf01a64
> Cr-Commit-Position: refs/heads/master@{#39599}

TBR=mythria@chromium.org,leszeks@chromium.org,rmcilroy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280

Review-Url: https://codereview.chromium.org/2360193003
Cr-Commit-Position: refs/heads/master@{#39612}

Rolling v8/base/trace_event/common to 6232c13e4edb36c84c61653fdae5a4afb5af9745

Rolling v8/build to 8438b8f51c0b125b298ad497c1bc1aa016c908ae

Rolling v8/buildtools to 57649e5e2001ba1f5e5d45f5a838c616ea0e9cb9

Rolling v8/tools/clang to c1f39cb405e8af68a20e08e9485275a42260a88f

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

Review-Url: https://codereview.chromium.org/2353363007
Cr-Commit-Position: refs/heads/master@{#39611}

BUG=chromium:635948
R=dgozman@chromium.org,alph@chromium.org

Committed: https://crrev.com/3d10918d2e1c57d72531c55a956262f5a72fceaa
Review-Url: https://codereview.chromium.org/2332163002
Cr-Original-Commit-Position: refs/heads/master@{#39426}
Cr-Commit-Position: refs/heads/master@{#39610}

BUG=v8:649078

Review-Url: https://codereview.chromium.org/2362503003
Cr-Commit-Position: refs/heads/master@{#39609}

BUG=chromium:635948
R=dgozman@chromium.org,alph@chromium.org
TBR=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2338413003
Cr-Commit-Position: refs/heads/master@{#39608}

Revert of [heap] Concurrently free empty typed slot set chunks. (patchset #3 id:40001 of https://codereview.chromium.org/2352423002/ )

Reason for revert:
TSAN failures on Linux64:

https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/11850

Also saw various threading-related flakiness on multiple bots.

Original issue's description:
> [heap] Concurrently free empty typed slot set chunks.
>
> BUG=chromium:648568
>
> Committed: https://crrev.com/ff8101d8e8d5e14dfa89de1252c510e6a0775539
> Cr-Commit-Position: refs/heads/master@{#39605}

TBR=ulan@chromium.org,hpayer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2358333002
Cr-Commit-Position: refs/heads/master@{#39607}

Runtime.evaluate can return result by value. We need to provide more details why method call was failed.

BUG=chromium:645640
R=dgozman@chromium.org,alph@chromium.org

Committed: https://crrev.com/0965b9b5df532d3aa0583966ca60794b54f56943
Review-Url: https://codereview.chromium.org/2345263003
Cr-Original-Commit-Position: refs/heads/master@{#39574}
Cr-Commit-Position: refs/heads/master@{#39606}

BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2352423002
Cr-Commit-Position: refs/heads/master@{#39605}

R=adamk@chromium.org
BUG=v8:1569

Review-Url: https://codereview.chromium.org/2353403003
Cr-Commit-Position: refs/heads/master@{#39604}

BUG=v8:5411

Review-Url: https://codereview.chromium.org/2354333003
Cr-Commit-Position: refs/heads/master@{#39603}

TEST=unittests/WasmModuleVerifyTest.Regression_648070
BUG=chromium:648070
R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2356253002
Cr-Commit-Position: refs/heads/master@{#39602}

Review-Url: https://codereview.chromium.org/2353503006
Cr-Commit-Position: refs/heads/master@{#39601}

This behavior is required by the WebAssembly spec.

TEST=mjsunit/wasm/ffi-error.js:I64ParamsInSignatureThrows

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2360653002
Cr-Commit-Position: refs/heads/master@{#39600}

This CL optimizes the code in BytecodeArrayBuilder and
BytecodeArrayWriter by making the following main changes:

 - Move operand scale calculation out of BytecodeArrayWriter to the
BytecodeNode constructor, where the decision on which operands are
scalable can generally be statically decided by the compiler.
 - Move the maximum register calculation out of BytecodeArrayWriter
and into BytecodeRegisterOptimizer (which is the only place outside
BytecodeGenerator which updates which registers are used). This
avoids the BytecodeArrayWriter needing to know the operand types
of a node as it writes it.
 - Modify EmitBytecodes to use individual push_backs rather than
building a buffer and calling insert, since this turns out to be faster.
 - Initialize BytecodeArrayWriter's bytecode vector by reserving 512
bytes,
 - Make common functions in Bytecodes constexpr so that they
can be statically calculated by the compiler.
 - Move common functions and constructors in Bytecodes and
BytecodeNode to the header so that they can be inlined.
 - Change large static switch statements in Bytecodes to const array
lookups, and move to the header to allow inlining.

I also took the opportunity to remove a number of unused helper
functions, and rework some others for consistency.

This reduces the percentage of time spent in making BytecodeArrays
 in  CodeLoad from ~15% to ~11% according to perf. The
CoadLoad score increase by around 2%.

BUG=v8:4280

Review-Url: https://codereview.chromium.org/2351763002
Cr-Commit-Position: refs/heads/master@{#39599}

BUG=v8:5388
R=bmeurer@chromium.org, adamk@chromium.org
TBR=hpayer@chromium.org

Review-Url: https://codereview.chromium.org/2348493003
Cr-Commit-Position: refs/heads/master@{#39598}

Review-Url: https://codereview.chromium.org/2353343002
Cr-Commit-Position: refs/heads/master@{#39597}