The following code was previously accepted:

  async function f() {
    let g = (await) => {};
  }

But per the spec, using 'await' is disallowed in arrow parameters
by an early error rule (just as 'yield' is disallowed in arrow
params inside generators).

There was special logic in ParseUnaryExpression which seems to have been
there only to allow that case. Having removed it, we get a SyntaxError in
the right cases anyway when ParseUnaryExpression chokes on whatever
illegal token follows 'await' in the cases this code previously handled.

Also removes the unnecessary AsyncBindingPatternProduction enum value.

R=caitp@igalia.com, littledan@chromium.org
BUG=v8:4483

Review-Url: https://codereview.chromium.org/2258313002
Cr-Commit-Position: refs/heads/master@{#38802}

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

Review-Url: https://codereview.chromium.org/2265073003
Cr-Commit-Position: refs/heads/master@{#38801}

Includes fast paths in the runtime for
DictionaryElementsAccessor, FastSmiOrObjectElementsAccessor,
FastDoubleElementsAccessor, TypedElementsAccessor, and
SloppyArgumentsElementsAccessor.

BUG=

Review-Url: https://codereview.chromium.org/2232063002
Cr-Commit-Position: refs/heads/master@{#38800}

Port 4598d913

Original commit message:

    This fixes the self-healing mechanism for closures in the interpreter
    entry trampoline not that bytecode can be preserved even when baseline
    code is already available.

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

BUG=chromium:638225
LOG=N

Review-Url: https://codereview.chromium.org/2265193002
Cr-Commit-Position: refs/heads/master@{#38799}

Also lots of cleanup around the checking for 'await' as an identifier
throughout the parser and preparser.

R=caitp@igalia.com, littledan@chromium.org
BUG=v8:4483,v8:5298

Review-Url: https://codereview.chromium.org/2267493002
Cr-Commit-Position: refs/heads/master@{#38798}

- Now "inner_scope_uses_eval_" is also set of scopes that call eval themselves.
- AllowLazyParsing doesn't check force_eager_compilation_ anymore.
- Both inner_scope_uses_eval_ and force_eager_compilation_ are propagated
  outwards immediately when set.

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2269603002
Cr-Commit-Position: refs/heads/master@{#38797}

Check remaining asm.js stdlib functions for validitity at instatiation.

Fail when a member is referenced, even if not used.

BUG= https://bugs.chromium.org/p/v8/issues/detail?id=4203
LOG=N
R=jpp@chromium.org,titzer@chromium.org

Review-Url: https://codereview.chromium.org/2267633002
Cr-Commit-Position: refs/heads/master@{#38796}

BUG=chromium:148757

Review-Url: https://codereview.chromium.org/2255973005
Cr-Commit-Position: refs/heads/master@{#38795}

(40B -> 32B, due to alignment rules. Should be neutral on 32b platforms.)

BUG=v8:4947

Review-Url: https://codereview.chromium.org/2256183005
Cr-Commit-Position: refs/heads/master@{#38794}

When doing a component build, some test binaries link against the object
files directly, bypassing the components. This results, however, and
rightly so, in linker warnings. In gyp, we just suppressed them. During
the transition to gn, this was dropped for two binaries.

Here I add the suppressions back in.

Long term, we should either change the tests to go through the public
API, or export the required symbols.

BUG=chromium:633688
R=jkummerow@chromium.org

Review-Url: https://codereview.chromium.org/2261123003
Cr-Commit-Position: refs/heads/master@{#38793}

BUG=v8:5264, v8:5268
R=mstarzinger@chromium.org, bmeurer@chromium.org, epertoso@chromium.org

Review-Url: https://codereview.chromium.org/2247353005
Cr-Commit-Position: refs/heads/master@{#38792}

Now that -0.0 and 0.0 are ordered by Float64Max and Float64Min, these
two operator are both associative and commutative for all numbers. The
operators would not be associative and commutative for NaNs, but
neither JavaScript nor WebAssembly distinguish between NaNs nowadays.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2263163002
Cr-Commit-Position: refs/heads/master@{#38791}

CallPrinter currently has only a single use, namely to print the call
site when throwing CalledNonCallable (ConstructedNonConstructable)
errors. This ensures that unicode call sites such as "あいう"() are
printed correctly by using an IncrementalStringBuilder internally.

BUG=637167

Review-Url: https://codereview.chromium.org/2265073002
Cr-Commit-Position: refs/heads/master@{#38790}

For PPC/s390 the case is missing where reference=attachedreference
how_to_code=kFromCode and  where_to_point=kStartOfObject. On PPC/s390
IsCodedSpecially always return true, hence how_to_code will not be a
straight pointer.
This should also fix the similar issue on mipsel.
The testcase was added as part of https://codereview.chromium.org/2205973003/

R=mtrofin@chromium.org, yangguo@chromium.org, titzer@chromium.org

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2247093002
Cr-Commit-Position: refs/heads/master@{#38789}

Disable inlining of Cpp to a direct CEntryStub call when a call would
require argument adaption, i.e. when argument adaption is enabled for
the given function and the actual argument count differs from the formal
parameter count.

This is intended to be a temporary fix until we either disable argument
adaption for all Cpp builtins or add adaption logic to inlined Cpp
builtins.

BUG=chromium:639752

Review-Url: https://codereview.chromium.org/2266893002
Cr-Commit-Position: refs/heads/master@{#38788}

Fix getter/setter typo so we use the correct object in DCHECK.

BUG=

Review-Url: https://codereview.chromium.org/2255713002
Cr-Commit-Position: refs/heads/master@{#38787}

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2265903003
Cr-Commit-Position: refs/heads/master@{#38786}

NOTRY=true

Review-Url: https://codereview.chromium.org/2265053002
Cr-Commit-Position: refs/heads/master@{#38785}

The new operators are implemented similar to the Float64(Max|Min) which
already exist. The purpose of the new operators is the implementation
of the F32Max and F32Min instructions in WebAssembly.

R=titzer@chromium.org, v8-arm-ports@googlegroups.com, v8-mips-ports@googlegroups.com

Review-Url: https://codereview.chromium.org/2252863003
Cr-Commit-Position: refs/heads/master@{#38784}

BUG=

Review-Url: https://codereview.chromium.org/2255313006
Cr-Commit-Position: refs/heads/master@{#38783}

BUG=

Review-Url: https://codereview.chromium.org/2262153002
Cr-Commit-Position: refs/heads/master@{#38782}

In theory the flag could otherwise be set on a blockscope that might be finalized (removed) before PropagateScopeInfo can propagate the flag around. In that case we'd lose the flag.

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2267683002
Cr-Commit-Position: refs/heads/master@{#38781}

Review-Url: https://codereview.chromium.org/2266813003
Cr-Commit-Position: refs/heads/master@{#38780}

This is the only user of outer_scope_calls_sloppy_eval. Inlining it simplifies scope analysis.

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2263123002
Cr-Commit-Position: refs/heads/master@{#38779}

Adds InterpreterCompilationJob as a sub-class of
CompilationJob, to enable off-thread bytecode
generation. Currently only used in
Interpreter::MakeBytecode.

As part of this change, CompilationJob is modified
to make it less specific to optimized compilation,
renaming the phases as follows:
 - CreateGraph -> PrepareJob
 - OptimizeGraph -> ExecuteJob
 - GenerateCode -> FinalizeJob

RegisterWeakObjectsInOptimizedCode is also moved out
of CompilationJob and instead becomes a static function
on Compiler.

BUG=v8:5203

Committed: https://crrev.com/1fb6a7e697e8bc5b4af51647553741f966e00cdc
Committed: https://crrev.com/785990e9fc0dd9a9d963d25d0bed2909165e4ca9
Committed: https://crrev.com/d7c6195c4c5cdc080caa74dfe2ae9ecab69bea73
Review-Url: https://codereview.chromium.org/2240463002
Cr-Original-Original-Original-Commit-Position: refs/heads/master@{#38662}
Cr-Original-Original-Commit-Position: refs/heads/master@{#38668}
Cr-Original-Commit-Position: refs/heads/master@{#38725}
Cr-Commit-Position: refs/heads/master@{#38778}

This makes us able to get rid of dependencies to parser.h from places
which only need the ParseInfo, and also gets rid of the curious Parser
<-> Compiler circular dependency.

Also IWYUd where necessary.

BUG=

Review-Url: https://codereview.chromium.org/2268513002
Cr-Commit-Position: refs/heads/master@{#38777}

This fixes the uncommon fallback when Compiler::CompileOptimized fails
creating optimized code and also the underlying SharedFunctionInfo is
not compiled. We make sure not to uselessly regenerate the bytecode.

R=rmcilroy@chromium.org
BUG=chromium:639753

Review-Url: https://codereview.chromium.org/2261123002
Cr-Commit-Position: refs/heads/master@{#38776}

BUG=chromium:625155
R=jkummerow@chromium.org

Review-Url: https://codereview.chromium.org/2265903002
Cr-Commit-Position: refs/heads/master@{#38775}

AstGraphBuilder overrides Visit(Expression*) to ensure that even if there is a
stack overflow, a value still gets produced. However, if there was no stack
overflow in the overriden function, but calling
AstVisitor<AstGraphBuilder>::Visit(expr) pushes us over the stack limit, then
the stack overflow check in that function will return without visiting the
expression, and the result will never get pushed.

To fix this, we add a new VisitNoStackOverflowCheck function which avoids the
inner stack check, and call that instead.

Since this depends on the size of C++ stack frames, there is no reliable test
I can add, however regress-635429.js exibits this behavior after
https://codereview.chromium.org/2240463002/ lands.

Review-Url: https://codereview.chromium.org/2262703002
Cr-Commit-Position: refs/heads/master@{#38774}

BUG=

Review-Url: https://codereview.chromium.org/2266843002
Cr-Commit-Position: refs/heads/master@{#38773}

This detects loops with integer decrements.

Drive-by fix: Add lower bounds to lower_bounds
zone vector instead of upper_bounds.

BUG=

Review-Url: https://codereview.chromium.org/2260153002
Cr-Commit-Position: refs/heads/master@{#38772}

Now it just relies on NeedsContext and hence is guaranteed to be in sync.

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2262133002
Cr-Commit-Position: refs/heads/master@{#38771}

Rebuilding (after touching certain files) is crazy slow because
includes are out of control.

Fixing it:
- Don't include stuff in headers unless necessary.
- Include the stuff you need, not some other stuff that happens to include the
stuff you need.

BUG=v8:5294

Review-Url: https://codereview.chromium.org/2258603003
Cr-Commit-Position: refs/heads/master@{#38770}

This adds cached versions of the DeoptimizeIf, DeoptimizeUnless and
Deoptimize operators that occur most often in various benchmarks.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2266743002
Cr-Commit-Position: refs/heads/master@{#38769}

Rolling v8/build to 3345815406d21b1ec594b95711ade879fa486241

Rolling v8/tools/clang to 781e8b3df3bbd631eae9560c1175aec8ce77f77d

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

Review-Url: https://codereview.chromium.org/2266723002
Cr-Commit-Position: refs/heads/master@{#38768}

parser and the preparser, so that they contain the same set of methods,
with the same signatures.  It mainly flags some traits methods as const.
It also contains a small cosmetic change in the definition of CHECK_OK.

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

Review-Url: https://codereview.chromium.org/2258123002
Cr-Commit-Position: refs/heads/master@{#38767}

This patch simply reorders the elements of classes ParserTraits
and PreParserTraits (mainly method headers), so that in both
classes the elements are defined in the same order.  This is
useful for easily verifying the consistency between these two
classes.

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

Review-Url: https://codereview.chromium.org/2264483003
Cr-Commit-Position: refs/heads/master@{#38766}

Rolling v8/build to 38a9cfaa10bf2b91c52f8a9ef4449723dd7aa706

Rolling v8/tools/mb to 99788b8b516c44d7db25cfb68695bc234fdee5ed

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

Review-Url: https://codereview.chromium.org/2267513002
Cr-Commit-Position: refs/heads/master@{#38765}

This patch subsumes CoverInitializedNameProduction to create an ObjectLiteralProduction which is now used to report the duplicate proto error as well.

This patch also changes ObjectLiteralChecker::CheckProperty
to record an ObjectLiteralProduction error instead of
bailing out immediately. Once we realize that we're in a
pattern, we rewind the error, otherwise we report the
error.

BUG=v8:5121

Review-Url: https://codereview.chromium.org/2255353002
Cr-Commit-Position: refs/heads/master@{#38764}

Also removed the "StandardProductions" enum value as its name is unhelpful
in deciding when to use it (and it only had a single reference).

R=gsathya@chromium.org

Review-Url: https://codereview.chromium.org/2260183003
Cr-Commit-Position: refs/heads/master@{#38763}