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}

Currently it is possible to get into a cycle of
mark-compact -> memory reducer -> mark-compact -> memory reducer ...
where the memory reducer does not free memory.

This patch ensures that the memory reducer restarts only if the
committed memory increased by sufficient amount after the last run.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2433933005
Cr-Commit-Position: refs/heads/master@{#40457}

R=danno@chromium.org
BUG=

Review-Url: https://chromiumcodereview.appspot.com/2435953002
Cr-Commit-Position: refs/heads/master@{#40456}

Revert of [inspector] migrate stepping related methods to debug-interface (patchset #3 id:40001 of https://chromiumcodereview.appspot.com/2423153002/ )

Reason for revert:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/10808

https://github.com/v8/v8/wiki/Blink-layout-tests

Original issue's description:
> [inspector] migrate stepping related methods to debug-interface
>
> * 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

TBR=yangguo@chromium.org,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=chromium:652939,v8:5510

Review-Url: https://chromiumcodereview.appspot.com/2441583002
Cr-Commit-Position: refs/heads/master@{#40455}

  port 99023682 (r40446)

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

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2431213003
Cr-Commit-Position: refs/heads/master@{#40454}

This makes the creation of frame states "before" and "after" node
sequences explicit in the {BytecodeGraphBuilder}. This removes some
complexity and also allows us to ellide redundant {Checkpoint} nodes
before operations that don't actually eager deoptimize.

In this change such redundant {Checkpoint} nodes have been removed for
arguments object and rest array creation bytecodes. The frame states
used in such {Checkpoint} nodes were actually bogus because they would
resume bytecode execution before the {new.target} value is assigned to
its respective variable.

R=jarin@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2437683003
Cr-Commit-Position: refs/heads/master@{#40453}

Revert of [profiler] Update cpu profile tracing format. (patchset #2 id:20001 of https://chromiumcodereview.appspot.com/2425093002/ )

Reason for revert:
Breaks
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/10805

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

Original issue's description:
> [profiler] Update cpu profile tracing format.
>
> Encapsulate nodes and samples into cpuProfile object.
>
> BUG=chromium:406277

TBR=caseq@chromium.org,lpy@chromium.org,yangguo@chromium.org,alph@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:406277

Review-Url: https://chromiumcodereview.appspot.com/2432373004
Cr-Commit-Position: refs/heads/master@{#40452}

BUG=chromium:644670
R=ahaas@chromium.org, titzer@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2438593003
Cr-Commit-Position: refs/heads/master@{#40451}

* 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

Review-Url: https://chromiumcodereview.appspot.com/2423153002
Cr-Commit-Position: refs/heads/master@{#40450}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/e54cf97..ee7e988

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapul/+log/ae987bf..fb397f8

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

Review-Url: https://chromiumcodereview.appspot.com/2429233005
Cr-Commit-Position: refs/heads/master@{#40449}

BUG=v8:4124
TEST:test-run-wasm-simd-lowering
R=titzer@chromium.org,bradnelson@chromium.org,gdeepti@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2294743003
Cr-Commit-Position: refs/heads/master@{#40448}

Encapsulate nodes and samples into cpuProfile object.

BUG=chromium:406277

Review-Url: https://chromiumcodereview.appspot.com/2425093002
Cr-Commit-Position: refs/heads/master@{#40447}

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

R=titzer@chromium.org, bmeurer@chromium.org
TEST=cctest/test-run-wasm/RunWasmCompiled_GraphTrimming

Review-Url: https://chromiumcodereview.appspot.com/2428443002
Cr-Commit-Position: refs/heads/master@{#40446}

Bonus: CodeStubAssembler::StringIndexOfChar gets the same treatment.
Review-Url: https://chromiumcodereview.appspot.com/2435713003
Cr-Commit-Position: refs/heads/master@{#40445}

This allows us to use more tasks for parallel evacuation.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2428043002
Cr-Commit-Position: refs/heads/master@{#40444}

We introduced TracedValue into V8 tracing previously, this patch uses it to
build JSON string of runtime statistics instead of using stringstream as buffer.

BUG=v8:5089
LOG=N

Review-Url: https://chromiumcodereview.appspot.com/2418303002
Cr-Commit-Position: refs/heads/master@{#40443}

R=verwaest@chromium.org,mstarzinger@chromium.org
BUG=

Review-Url: https://chromiumcodereview.appspot.com/2425563003
Cr-Commit-Position: refs/heads/master@{#40442}

Port 77419488

Original commit message:

  This slot is completely unused and always undefined anyways, so there's
  no need to maintain the slot during object construction.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, bjaideep@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com
BUG=

Review-Url: https://chromiumcodereview.appspot.com/2429983002
Cr-Commit-Position: refs/heads/master@{#40441}

Moving the rest of the debugging code is blocked on making IsPromise inlinable.

BUG=v8:5343

Review-Url: https://chromiumcodereview.appspot.com/2431793003
Cr-Commit-Position: refs/heads/master@{#40440}

Taking similar approach as ia32 which also has 1 return register
eax (as per ia32's ABI) but uses edx as return register as well.
This will fix some failures on s390x where a function returns 2
values.

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

BUG=
LOG=N

Review-Url: https://chromiumcodereview.appspot.com/2426233002
Cr-Commit-Position: refs/heads/master@{#40439}

R=clemensh@chromium.org
BUG=

Review-Url: https://chromiumcodereview.appspot.com/2431183005
Cr-Commit-Position: refs/heads/master@{#40438}

R=danno@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2438483002
Cr-Commit-Position: refs/heads/master@{#40437}

R=bmeurer@chromium.org
BUG=

Review-Url: https://chromiumcodereview.appspot.com/2437733002
Cr-Commit-Position: refs/heads/master@{#40436}

For fullcodegen the RuntimeProfiler has a shortcut that allows it to
tier up small functions earlier, when enough type feedback is available.
Port the same optimization for the Ignition+TurboFan pipeline.

R=mstarzinger@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2427283004
Cr-Commit-Position: refs/heads/master@{#40435}

This CL refactors the handling of metadata associated with WebAssembly
modules to reduce the duplicate marshalling of data from the C++ world
to the JavaScript world. It does this by wrapping the C++ WasmModule*
object in a Foreign that is rooted from the on-heap WasmCompiledModule
(which is itself just a FixedArray). Upon serialization, the C++ object
is ignored and the original WASM wire bytes are serialized. Upon
deserialization, the C++ object is reconstituted by reparsing the bytes.

This is motivated by increasing complications in implementing the JS
API, in particular WebAssembly.Table, which must perform signature
canonicalization across instances.

Additionally, this CL implements the proper base + offset initialization
behavior for tables.

R=rossberg@chromium.org,bradnelson@chromium.org,mtrofin@chromium.org,yangguo@chromium.org
BUG=v8:5507, chromium:575167, chromium:657316

Review-Url: https://chromiumcodereview.appspot.com/2424623002
Cr-Commit-Position: refs/heads/master@{#40434}

Add legend that explains the abbreviations for different IC states
to IC explorer. Copied from ic.cc.

BUG=

Review-Url: https://chromiumcodereview.appspot.com/2431183004
Cr-Commit-Position: refs/heads/master@{#40433}