BUG=

Review-Url: https://chromiumcodereview.appspot.com/2442693002
Cr-Commit-Position: refs/heads/master@{#40497}

Reland Update implementation of atomics with latest Chromium version but use compiler builtin atomics

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2438273002
Cr-Commit-Position: refs/heads/master@{#40496}

These map checks were implemented for TF code already. This CL makes
sure that parts implemented in C++ follow the same logic, which is:

An object is an unmodified regexp if:
1) it's a receiver,
2) its map is the initial regexp map,
3) its prototype is a receiver,
4) and its prototype's map is the initial prototype's initial map.

We can now be smarter in @@replace and @@split since checking maps
(unlike the previous check of RegExp.prototype.exec) is not observable,
so we can perform fast-path checks at a time of our choosing.

BUG=v8:5339,v8:5434,v8:5123

Review-Url: https://chromiumcodereview.appspot.com/2434983002
Cr-Commit-Position: refs/heads/master@{#40495}

Additionally, remove all code related to the old-style slots filtering and black area end markers.

BUG=chromium:648568

Review-Url: https://chromiumcodereview.appspot.com/2440683002
Cr-Commit-Position: refs/heads/master@{#40494}

The bigcore shares same instruction latency table as smallcore (ATOM).
The accurate latency modeling will benefit the instruction scheduler for
ia32 and x64 without introducing extra regression.

Review-Url: https://chromiumcodereview.appspot.com/2130153003
Cr-Commit-Position: refs/heads/master@{#40493}

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2431273002
Cr-Commit-Position: refs/heads/master@{#40492}

BUG=v8:5553
NOTRY=true
TBR=hablich@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2440693003
Cr-Commit-Position: refs/heads/master@{#40491}

When the instance has imported memory, calling GrowMemory should update the memory object to have a consistent view of the memory. This fixes the failing emscripten test case, added a reduced test that simulates the same behavior.

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

Review-Url: https://chromiumcodereview.appspot.com/2438673006
Cr-Commit-Position: refs/heads/master@{#40490}

Revert of Update implementation of atomics with latest Chromium version but use compiler builtin atomics (patchset #10 id:190001 of https://chromiumcodereview.appspot.com/2425963002/ )

Reason for revert:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Android%20Arm64%20-%20builder/builds/4851

Original issue's description:
> Update implementation of atomics with latest Chromium version but use compiler builtin atomics
>
> Ideally, we would use the standard library. However, when we are compiling against an older version of the standard library the atomic implementation may be slow.
>
> BUG=

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

Review-Url: https://chromiumcodereview.appspot.com/2438983002
Cr-Commit-Position: refs/heads/master@{#40489}

Ideally, we would use the standard library. However, when we are compiling against an older version of the standard library the atomic implementation may be slow.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2425963002
Cr-Commit-Position: refs/heads/master@{#40488}

This introduces:
- a way in d8 to send messages to the inspector and receive responses.
- a new test suite where existing debugger tests should migrate to.

R=jgruber@chromium.org, kozyatinskiy@chromium.org, machenbach@chromium.org
BUG=v8:5530

Review-Url: https://chromiumcodereview.appspot.com/2425973002
Cr-Commit-Position: refs/heads/master@{#40487}

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapul/+log/fb397f8..147f2cf

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

Review-Url: https://chromiumcodereview.appspot.com/2434373003
Cr-Commit-Position: refs/heads/master@{#40486}

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://chromiumcodereview.appspot.com/2439673005
Cr-Commit-Position: refs/heads/master@{#40485}

BUG=chromium:656823
R=dgozman@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2436783003
Cr-Commit-Position: refs/heads/master@{#40484}

* introduced DebugInterface::PrepareStep and DebugInterface::ClearStepping method.
Inspector calls these methods only on pause and not interseted in calling this for not current break_id so we don't need to expose debug interface with break_id argument and can only check that current break_id is valid.

BUG=chromium:652939,v8:5510
R=yangguo@chromium.org,dgozman@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Review-Url: https://chromiumcodereview.appspot.com/2423153002
Cr-Commit-Position: refs/heads/master@{#40483}

R=adamk@chromium.org, marja@chromium.org
BUG=

Review-Url: https://chromiumcodereview.appspot.com/2436073002
Cr-Commit-Position: refs/heads/master@{#40482}

Revert of Speedup access to global_proxy.* attributes/accessors. (patchset #6 id:160001 of https://codereview.chromium.org/2403003002/ )

Reason for revert:
Revert, because of crbug.com/656959.

Original issue's description:
> Speedup access to global_proxy.* attributes/accessors.
>
> Using a global proxy (e.g. 'window.f', 'w.f' or 'this.f') is considerably slower than evaluating just 'f'. This CL aims to perform the necessary checks at compile time and inline the accesses.
>
> This is a follow-on CL to crrev.com/2369933005:
> - The initial upload is crrev.com/2369933005 + a rebase.
> - The remaining issues are the fixes requested by the reviewers on that CL.
>
> BUG=chromium:634276, chromium:654716
>
> Committed: https://crrev.com/8f43d748272536117008aa6a1b53ea52126261c1
> Committed: https://crrev.com/041314524952a3c1bc71bd3beafbbb37319f1d22
> Cr-Original-Commit-Position: refs/heads/master@{#40153}
> Cr-Commit-Position: refs/heads/master@{#40365}

TBR=jochen@chromium.org,verwaest@chromium.org
NOTRY=true
NOPRESUBMIT=true
BUG=chromium:634276, chromium:654716

Review-Url: https://chromiumcodereview.appspot.com/2434233002
Cr-Commit-Position: refs/heads/master@{#40481}

Encapsulate nodes and samples into cpuProfile object.

BUG=chromium:406277

Review-Url: https://chromiumcodereview.appspot.com/2425093002
Cr-Commit-Position: refs/heads/master@{#40480}

Move hole check logic from full-codegen into scope analysis, and store the
"needs hole check" bit on VariableProxy. This makes it easy to re-use in
any backend: it will be trivial to extend the use of this logic in, e.g.,
full-codegen variable stores.

While changing the signatures of the variable loading/storing methods in
Ignition, I took the liberty of replacing the verb "Visit" with "Build", since these
are not part of AST visiting.

BUG=v8:5460

Review-Url: https://chromiumcodereview.appspot.com/2411873004
Cr-Commit-Position: refs/heads/master@{#40479}

Reland "[heap] Start sweeper tasks after evacuation. (patchset #2 id:20001 of https://chromiumcodereview.appspot.com/2428043002/ )"

The performance regression in crbug.com/657776 was not caused by this CL.

This reverts commit 4490a760.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2437873004
Cr-Commit-Position: refs/heads/master@{#40478}

This CL adds support for:
https://discourse.wicg.io/t/allow-const-global-variables/684

It allows global const variables to be used as if they were numeric
literals. For example:

  const f0 = fround(0);
  ...
  function foo() {
    var v = f0;  // no type annotation.
    ...
    return f0;  // no return type annotation.
  }

BUG= https://bugs.chromium.org/p/v8/issues/detail?id=5540

Review-Url: https://chromiumcodereview.appspot.com/2435823002
Cr-Commit-Position: refs/heads/master@{#40477}

Added a size constraint to the configuration to limit the segment pool.
This will likely fix the memory alerts from small android devices.

BUG=chromium:655129

Review-Url: https://chromiumcodereview.appspot.com/2424393002
Cr-Commit-Position: refs/heads/master@{#40476}

Port 99023682

Original commit message:

    The scheduler expects a trimmed graph, so we have to trim the graph
    before scheduling.

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://chromiumcodereview.appspot.com/2431093004
Cr-Commit-Position: refs/heads/master@{#40475}

The wasm specification does not fully specify the binary representation
of NaN: the sign bit can be non-deterministic. The wasm-code fuzzer
found a test case where the wasm interpreter and the compiled code
produce a different sign bit for a NaN, and as a consequence they
produce different results.

With this CL the interpreter tracks whether it executed an instruction
which can produce a NaN, which are div and sqrt instructions. The
fuzzer uses this information and compares the result of the interpreter
with the result of the compiled code only if there was no instruction
which could have produced a NaN.

R=titzer@chromium.org

TEST=cctest/test-run-wasm-interpreter/TestMayProduceNaN
BUG=chromium:657481

Review-Url: https://chromiumcodereview.appspot.com/2438603003
Cr-Commit-Position: refs/heads/master@{#40474}

We don't need the Deserialize API taking in a SerializedData anymore.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2436543004
Cr-Commit-Position: refs/heads/master@{#40473}

When allocating for splinters, we were prematurely reverting to the
hot range behavior, even when the range didn't actually have any
positions requiring a register. This could cause unnecessary moves.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2436813003
Cr-Commit-Position: refs/heads/master@{#40472}

Breaks layout tests on Blink builders.

TBR=machenbach@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2428413004
Cr-Commit-Position: refs/heads/master@{#40471}

R=mythria@chromium.org
BUG=v8:5038

Review-Url: https://chromiumcodereview.appspot.com/2437023002
Cr-Commit-Position: refs/heads/master@{#40470}

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2433333002
Cr-Commit-Position: refs/heads/master@{#40469}

Add support to collect feedback about oddballs for Bitwise binary operations and
Increment and decrement operations. For the case of Oddballs the code to convert
them to numbers is inlined into the handlers instead of calling the
NonNumberToNumber Stub.

BUG=v8:4280, v8:5400

Review-Url: https://chromiumcodereview.appspot.com/2407103003
Cr-Commit-Position: refs/heads/master@{#40468}

SEB and SEH instructions are not available on MIPS32R1. This caused several failures on
MIPS32R1 in mjsunit/wasm/* and mjsunit/asm test suites.
This fix simulates these instruction in MacroAssembler for those architectures that do not support them.

TEST=mjsunit/asm/sqlite3/sqlite-pointer-masking,mjsunit/wasm/embenchen/lua_binarytrees
BUG=

Review-Url: https://chromiumcodereview.appspot.com/2434973002
Cr-Commit-Position: refs/heads/master@{#40467}

This CL also introduces IsSetWord<T>(..) and IsSetWord32<T>(..) operations
to ease checking if the bit field is set or not.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2436893003
Cr-Commit-Position: refs/heads/master@{#40466}

Revert of [heap] Start sweeper tasks after evacuation. (patchset #2 id:20001 of https://chromiumcodereview.appspot.com/2428043002/ )

Reason for revert:
Performance regression on arm64: crbug.com/657776

Original issue's description:
> [heap] Start sweeper tasks after evacuation.
>
> This allows us to use more tasks for parallel evacuation.
>
> BUG=

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

Review-Url: https://chromiumcodereview.appspot.com/2440693002
Cr-Commit-Position: refs/heads/master@{#40465}

Revert of [inspector] align console implementation with spec (patchset #2 id:20001 of https://chromiumcodereview.appspot.com/2428473003/ )

Reason for revert:
Breaks roll: https://build.chromium.org/p/tryserver.chromium.android/builders/linux_android_rel_ng/builds/164610

See https://chromiumcodereview.appspot.com/2434733002/ for more context

Original issue's description:
> [inspector] align console implementation with spec
>
> console should be non enumerable.
>
> BUG=chromium:656826
> R=dgozman@chromium.org

TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
NOTRY=true
BUG=chromium:656826

Review-Url: https://chromiumcodereview.appspot.com/2435013002
Cr-Commit-Position: refs/heads/master@{#40464}

R=ahaas@chromium.org
BUG=chromium:654231

Review-Url: https://chromiumcodereview.appspot.com/2439613003
Cr-Commit-Position: refs/heads/master@{#40463}

This enables Ignition unconditionally for all code that is destined for
optimization with TurboFan. This ensures all optimization attempts will
go through the BytecodeGraphBuilder and that the AstGraphBuilder pipe is
dried out in practice.

R=mvstanton@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2427953002
Cr-Commit-Position: refs/heads/master@{#40462}

This removes validation code for state value consistency within frame
states in the {BytecodeGraphBuilder} that is no longer used.

R=jarin@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2432043006
Cr-Commit-Position: refs/heads/master@{#40461}

Review-Url: https://chromiumcodereview.appspot.com/2435783002
Cr-Commit-Position: refs/heads/master@{#40460}

Review-Url: https://chromiumcodereview.appspot.com/2434753003
Cr-Commit-Position: refs/heads/master@{#40459}

R=ahaas@chromium.org
BUG=chromium:654231

Review-Url: https://chromiumcodereview.appspot.com/2433313002
Cr-Commit-Position: refs/heads/master@{#40458}