In some (rare) cases, the context depth passed to a dynamic variable lookup can
be zero. In these cases, the fast path for the lookup (i.e. load from context or
global) can always be taken, as there is no need to search the current context.

However, with no slow path checks, the bytecode graph builder had a null
environment for the slow path, causing segfaults when this graph was built.

This patch adds a null check for the slow path environment, and skips building
the slow path if the environment is null.

BUG=chromium:652186

Review-Url: https://codereview.chromium.org/2385123002
Cr-Commit-Position: refs/heads/master@{#39949}

Clear also frees the memory, which isn't useful in the case of a zonelist. If we later want to use the list (e.g., because of aborting), that will cause additional allocations.

BUG=

Review-Url: https://codereview.chromium.org/2391953002
Cr-Commit-Position: refs/heads/master@{#39948}

If an inner function only declares a variable but doesn't use it, Parser
and PreParser produced different unresolved variables, and that confused
the pessimistic context allocation.

BUG=chromium:650969

Review-Url: https://codereview.chromium.org/2388183003
Cr-Commit-Position: refs/heads/master@{#39947}

BUG=

Review-Url: https://codereview.chromium.org/2377943003
Cr-Commit-Position: refs/heads/master@{#39946}

Review-Url: https://codereview.chromium.org/2389553002
Cr-Commit-Position: refs/heads/master@{#39945}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/35c436b..ba2b708

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

Review-Url: https://codereview.chromium.org/2389093002
Cr-Commit-Position: refs/heads/master@{#39944}

- Changes tests to canonicalize FP slot/register moves, to simplify
testing any implementations that may fragment FP register moves.
- Adds code to generate correct ParallelMoves (e.g. no slot sources
of different reps overlapping.)
- Refactors test functions, so we can add manually generated tests
to current fuzzed tests.
- Adds SIMD operands, since these can be tested here now.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2365983002
Cr-Commit-Position: refs/heads/master@{#39943}

Introduce Protocol.Domain.method(args) and Protocol.Domain.onEventName() instead.
Renamed InspectorTest.evaluateInPage -> InspectorTest.addScript.
Improved InspectorTest.logMessage.

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

Review-Url: https://codereview.chromium.org/2390733002
Cr-Commit-Position: refs/heads/master@{#39942}

- Orders machine representations so it's easier to check for floating
point.
- Orders operand types so it's easier to check for LocationOperands.
- Adds IsLocation, IsFPLocation predicates.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2382013003
Cr-Commit-Position: refs/heads/master@{#39941}

Added a test that Runtime.getProperties doesn't truncate Set and Map properties in [[Entries]] in internalProperties.

BUG=chromium:650729
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2376863002
Cr-Commit-Position: refs/heads/master@{#39940}

InspectedContext can be destroyed inside of V8ConsoleMessage::createForConsoleAPI call.

BUG=chromium:646175
R=dgozman@chromium.org,alph@chromium.org

Review-Url: https://codereview.chromium.org/2388463002
Cr-Commit-Position: refs/heads/master@{#39939}

BUG=chromium:644629
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2370033003
Cr-Commit-Position: refs/heads/master@{#39938}

Recent changes to the wasm format prevent you from knowing
the function index of a direct call until you know how many
imports you have (the index spaces have been merged).

Asm.js validation can't know this until all callsites have been
visited if you want to avoid materializing the entire AST / parsing twice.
Instead, keep a list of fixups to perform for all direct callsites,
then update these with the imports count added when emitting the module.

BUG=v8:4203
R=aseemgarg@chromium.org,titzer@chromium.org

Review-Url: https://codereview.chromium.org/2384623003
Cr-Commit-Position: refs/heads/master@{#39937}

- Coalesced all anonymous namespaces into one, and moved it to the
top of the file, to match elsewhere in the v8 codebase.
- Deleted dead code.
- Moved functions that turned out to be local to wasm-module.cc to
the anonymous namespace.

BUG=

Review-Url: https://codereview.chromium.org/2384183002
Cr-Commit-Position: refs/heads/master@{#39936}

Currently the parameter is first parsed as a reference, and then translated into a parameter. The reference stays around though, and gets resolved to the parameter. That automatically creates a use. Now that I drop all unresolved references when we abort preparsing, that also drops the unresolved reference.

Instead, mark the variable as used when its marked as forced context allocation. That's what happens in almost all other cases.

This raises the question: does it really make sense to parse parameters this ways? It seems pretty generic, but neither fast nor memory-efficient ... Did I misunderstand something?

Just land if you think the CL looks good as is.

BUG=chromium:651613

Review-Url: https://codereview.chromium.org/2386623002
Cr-Commit-Position: refs/heads/master@{#39935}

Re-enable marking functions for optimized compilation on the next call
when using OSR. We would previously do this for all functions. However,
it only benefits functions marked for concurrent recompilation. These
would potentially run unoptimized again and be OSRed again.
In addition any function that already was optimized concurrently had
it's optimized code removed and would have been recompiled. Functions to
be baselined would skip that and possibly deopt.

BUG=chromium:651042

Review-Url: https://codereview.chromium.org/2391533002
Cr-Commit-Position: refs/heads/master@{#39934}

BUG=chromium:651211
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2381693002
Cr-Commit-Position: refs/heads/master@{#39933}

Hashmaps with a simple key equality method (comparing pointers) don't
need to waste cycles (and branches) comparing hash values, as the key
comparison is cheap.

This patch modifies the hashmap's MatchFun to take the hashes as well as
the keys, thus allowing the MatchFun to ignore the hashes. This allows
slightly cleaner generated code, especially when the MatchFun is
inlined.

BUG=

Review-Url: https://codereview.chromium.org/2381303002
Cr-Commit-Position: refs/heads/master@{#39932}

- added most part of inspector tests that depends only on JavaScript domains.

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

Committed: https://crrev.com/9ddbdab195923fc87fae3587ae06c5c1c5ca6d79
Review-Url: https://codereview.chromium.org/2369753004
Cr-Original-Commit-Position: refs/heads/master@{#39897}
Cr-Commit-Position: refs/heads/master@{#39931}

- added inspector test suite definition in testcfg.py
- added JS infrastructure for tests in protocol-test.js

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

Committed: https://crrev.com/4a5f5d0991656a6aa45b0021a0f5ba6a7ceabe15
Review-Url: https://codereview.chromium.org/2370743003
Cr-Original-Commit-Position: refs/heads/master@{#39895}
Cr-Commit-Position: refs/heads/master@{#39930}

- added test runner, that takes file names and V8 flags as arguments and run scripts from passed files with passed flags in frontend context

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

Committed: https://crrev.com/f3f9f4448dfa533d768878245a9bdbb57b4d941b
Review-Url: https://codereview.chromium.org/2372793002
Cr-Original-Commit-Position: refs/heads/master@{#39891}
Cr-Commit-Position: refs/heads/master@{#39929}

- added the channel implementation,
- added inspector implementation,
- added v8::Extension for communication between backend and frontend.

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

Committed: https://crrev.com/cceaa1225c6a96a28d2c7410d1db520423fb8c31
Review-Url: https://codereview.chromium.org/2368393003
Cr-Original-Commit-Position: refs/heads/master@{#39888}
Cr-Commit-Position: refs/heads/master@{#39928}

Rolling v8/base/trace_event/common: https://chromium.googlesource.com/chromium/src/base/trace_event/common/+log/08b7b94..e0fa02a

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clan/+log/f991b26..1f92f99

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

Review-Url: https://codereview.chromium.org/2390503002
Cr-Commit-Position: refs/heads/master@{#39927}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2768397..35c436b

Rolling v8/tools/gyp: https://chromium.googlesource.com/external/gyp/+log/702ac58..e7079f0

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

Review-Url: https://codereview.chromium.org/2384923002
Cr-Commit-Position: refs/heads/master@{#39926}

Calculate memory size from the available heap. This avoids
the bugs due to some numbers being stored as objects (by-ref)
and thus needing special handling when cloning.

This leaves all the rest of the numbers as read-only.

Further simplified by representing globals size as a Smi.

BUG=

Committed: https://crrev.com/7ced1bdc9df2315ccc07dd17c12736aebf40cb57
Review-Url: https://codereview.chromium.org/2381393002
Cr-Original-Commit-Position: refs/heads/master@{#39923}
Cr-Commit-Position: refs/heads/master@{#39925}

Revert of [wasm] further simplification of WasmCompiledModule (patchset #1 id:1 of https://codereview.chromium.org/2381393002/ )

Reason for revert:
Failures on multiple bots (e.g. https://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress/builds/8887)

Original issue's description:
> [wasm] further simplification of WasmCompiledModule
>
> Calculate memory size from the available heap. This avoids
> the bugs due to some numbers being stored as objects (by-ref)
> and thus needing special handling when cloning.
>
> This leaves all the rest of the numbers as read-only.
>
> Further simplified by representing globals size as a Smi.
>
> BUG=
>
> Committed: https://crrev.com/7ced1bdc9df2315ccc07dd17c12736aebf40cb57
> Cr-Commit-Position: refs/heads/master@{#39923}

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

Review-Url: https://codereview.chromium.org/2385943002
Cr-Commit-Position: refs/heads/master@{#39924}

Calculate memory size from the available heap. This avoids
the bugs due to some numbers being stored as objects (by-ref)
and thus needing special handling when cloning.

This leaves all the rest of the numbers as read-only.

Further simplified by representing globals size as a Smi.

BUG=

Review-Url: https://codereview.chromium.org/2381393002
Cr-Commit-Position: refs/heads/master@{#39923}

Fixes the case when the 'imm' is in range [8000,ffff], as the specification
says the 'imm' is sign-extended before the comparsion, so the effective range
is [max_unsigned-7fff,max_unsigned].

TEST=mjsunit/generated-transition-stub@3b8ad45e
BUG=

Review-Url: https://codereview.chromium.org/2386673002
Cr-Commit-Position: refs/heads/master@{#39922}

This is to avoid a dereference of the unhandlified {this} reference
after handlified allocation functions have been called. Combining
handlified and unhandlified style is inherently unsafe.

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2380463006
Cr-Commit-Position: refs/heads/master@{#39921}

matching function, creates a hashmap the specialises the case of keys
that simply check pointer equality.

I measure an average ~1% improvement on Octane code-load.

Review-Url: https://codereview.chromium.org/2369963002
Cr-Commit-Position: refs/heads/master@{#39920}

This is essentially CL/2275293002, with the difference that the effect
dependencies are now updated correctly.

BUG=

Review-Url: https://codereview.chromium.org/2378773013
Cr-Commit-Position: refs/heads/master@{#39919}

- added a inspector folder,
- added related GN and gyp files,
- added task handling infrastructure for test runner.

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

Committed: https://crrev.com/dc1c71c0dc8a5c4ade4aa291f2ddcd02e90c64b2
Review-Url: https://codereview.chromium.org/2361623006
Cr-Original-Commit-Position: refs/heads/master@{#39866}
Cr-Commit-Position: refs/heads/master@{#39918}

R=hpayer@chromium.org
BUG=chromium:651828

Review-Url: https://codereview.chromium.org/2377203003
Cr-Commit-Position: refs/heads/master@{#39917}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/d3f34f8..2768397

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

Review-Url: https://codereview.chromium.org/2379343002
Cr-Commit-Position: refs/heads/master@{#39916}

This makes our configuration similar to Chromium's for
android performance testing.

This blocks deps'ing in:
https://codereview.chromium.org/2377013002

BUG=chromium:648948
NOTRY=true

Review-Url: https://codereview.chromium.org/2383743002
Cr-Commit-Position: refs/heads/master@{#39915}

Review-Url: https://codereview.chromium.org/2380563005
Cr-Commit-Position: refs/heads/master@{#39914}

This moves the Hydrogen-specific {is_tracking_positions} predicate which
also depends on the --hydrogen-track-positions flag into the Crankshaft
directory and removes it from the more general {CompilationInfo}.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2377283002
Cr-Commit-Position: refs/heads/master@{#39913}

R=hpayer@chromium.org
TEST=test-heap/Regress598319

Review-Url: https://codereview.chromium.org/2381493004
Cr-Commit-Position: refs/heads/master@{#39912}

Review-Url: https://codereview.chromium.org/2385653002
Cr-Commit-Position: refs/heads/master@{#39911}

It was meant to be recursive.

BUG=

Review-Url: https://codereview.chromium.org/2381283002
Cr-Commit-Position: refs/heads/master@{#39910}