As part of the work to implement catch prediction for async functions,
the resulting Promise that is the output of the function needs to be
available earlier for a couple reasons:
- To be able to do %DebugPushPromise/%DebugPopPromise over the body
  of the async function
- To be able to pass the resulting promise into AsyncFunctionAwait
  in order to set up the dependency chains

This patch creates the Promise earlier and pushes it onto the debug
stack; a later patch will set up the dependency chain. Although the
debug stack is set up, it's not anticipated that this will change
the catch prediction helpfully yet, as everything will still likely
be predicted as 'caught' for now, as before.

R=caitp@igalia.com,yangguo@chromium.org
CC=neis@chromium.org,gsathya@chromium.org
BUG=v8:5167

Review-Url: https://codereview.chromium.org/2233923003
Cr-Commit-Position: refs/heads/master@{#38957}

R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2282043002
Cr-Commit-Position: refs/heads/master@{#38956}

By removing the copy flag, we reduce the amount of strings to be copied each
time.

BUG=v8:5089
LOG=N

Review-Url: https://codereview.chromium.org/2233993002
Cr-Commit-Position: refs/heads/master@{#38955}

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

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2283773003
Cr-Commit-Position: refs/heads/master@{#38954}

When looking up variables in the ScopeInfo, we did a linear scan of the
ScopeInfo. Since that's unacceptably slow, a context slot cache was added
that would speed up repeated lookups of the same variable.

Instead, just always fully convert the ScopeInfo into scopes, so they can
lookup variables without scanning the ScopeInfo.

This also allows for removing the now unused ContextSlotCache.

R=adamk@chromium.org,verwaest@chromium.org,marja@chromium.org
BUG=v8:5315

Review-Url: https://codereview.chromium.org/2280933002
Cr-Commit-Position: refs/heads/master@{#38953}

callback_entrypoint_address call could return nullptr and therefore
causes seg fault intermittently.

R=jochen@chromium.org, lpy@chromium.org, yangguo@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2274573007
Cr-Commit-Position: refs/heads/master@{#38952}

BUG=v8:5260

Review-Url: https://codereview.chromium.org/2277513003
Cr-Commit-Position: refs/heads/master@{#38951}

BUG=v8:5260

Review-Url: https://codereview.chromium.org/2269053002
Cr-Commit-Position: refs/heads/master@{#38950}

BUG=v8:5260

Review-Url: https://codereview.chromium.org/2278523002
Cr-Commit-Position: refs/heads/master@{#38949}

The embedder is expected to arrange for the array buffer contents to be
transferred into a v8::ArrayBuffer in the receiving context (generally by
assuming ownership of the externalized backing store).

BUG=chromium:148757

Review-Url: https://codereview.chromium.org/2275033003
Cr-Commit-Position: refs/heads/master@{#38948}

BUG=v8:5260

Review-Url: https://codereview.chromium.org/2263303003
Cr-Commit-Position: refs/heads/master@{#38947}

We should always only have exactly as many heap slots as context locals

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

Review-Url: https://codereview.chromium.org/2280883002
Cr-Commit-Position: refs/heads/master@{#38946}

The accumulator is always part of the translation for every interpreted
frame. The assumption is that all frames are in {TOS_REGISTER} state.
This however is not supported for non-topmost frames and we need to
avoid pushing the accumulator onto the machine stack.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2271153003
Cr-Commit-Position: refs/heads/master@{#38945}

These DCHECKs were causing several test failures or r6. They should not
be here because only NEG.PS format was removed in r6, NEG.S and NEG.D
instructions remain.

BUG=

Review-Url: https://codereview.chromium.org/2276563006
Cr-Commit-Position: refs/heads/master@{#38944}

Floating point negate instructions are still present in release 6, only
one format of neg is removed, NEG.PS. Others formats can be used and in
r6 they also change the sign of NaN-like operands as well. This makes r6
generated code simpler for Neg_d and Neg_s macroassembler functions.

BUG=

Review-Url: https://codereview.chromium.org/2285703002
Cr-Commit-Position: refs/heads/master@{#38943}

BUG=chromium:641267
R=verwaest@chromium.org

Review-Url: https://codereview.chromium.org/2283713002
Cr-Commit-Position: refs/heads/master@{#38942}

on architectures that do not support missaligned memory access

BUG=unittests/AstDecoderTest.Float64Const, unittests/AstDecoderTest.Float32Const

Review-Url: https://codereview.chromium.org/2275323002
Cr-Commit-Position: refs/heads/master@{#38941}

New space evaucation in MC supports, similar to scavenges, fall back allocation
in old space.

For new space evacuation we support stick and non-sticky modes for fallback. The
sticky mode essentially removes the capability to allocate in new space while
the non-sticky mode only falls back for a single allocation.

We use the non-sticky mode for allocations that are too large for a LAB but
should still go in new space. When such an allocation fails in new space, we
allocate in old space in non-sticky mode as we would still like to reuse the
remainder memory in new space. However, in such a case we fail to properly
report the space allocated in resulting in a missed recorded slot.

BUG=chromium:641270
R=ulan@chromium.org

Review-Url: https://codereview.chromium.org/2280943002
Cr-Commit-Position: refs/heads/master@{#38940}

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2286593003
Cr-Commit-Position: refs/heads/master@{#38939}

These tests became obsolete. They tested a requirement that has been
removed from the WebAssembly specification.

R=titzer@chromium.org, Balazs.Kilvady@imgtec.com

Review-Url: https://codereview.chromium.org/2284593002
Cr-Commit-Position: refs/heads/master@{#38938}

Review-Url: https://codereview.chromium.org/2264283007
Cr-Commit-Position: refs/heads/master@{#38937}

This CL fixes the first bug I found with the new fuzzing. The problem is
that the number of locals is unbounded. This CL bounds the number of
locals of one type with 8000000, an arbitrary number.

R=titzer@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2271803004
Cr-Commit-Position: refs/heads/master@{#38936}

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2281863002
Cr-Commit-Position: refs/heads/master@{#38935}

A minor change in the logic of expression classifiers that
eliminates the use for MergeNonPatterns.

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

Review-Url: https://codereview.chromium.org/2275313002
Cr-Commit-Position: refs/heads/master@{#38934}

Rebuilding (after touching certain files) is crazy slow because
includes are out of control. Many of these files we need to rebuild are
cctests which pull in more includes than they need.

BUG=v8:5294

Review-Url: https://codereview.chromium.org/2278103002
Cr-Commit-Position: refs/heads/master@{#38933}

Using the dedicated simplified operator we are able to eliminate
redundant neuterung checks as long as there is no call in the
effect chain. This yields a nice speed up for the Octane Mandreel
benchmark (and TypedArray-heavy workloads in general).

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

Review-Url: https://codereview.chromium.org/2279213002
Cr-Commit-Position: refs/heads/master@{#38932}

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

Review-Url: https://codereview.chromium.org/2275943005
Cr-Commit-Position: refs/heads/master@{#38931}

BUG=chromium:639818
R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2279193002
Cr-Commit-Position: refs/heads/master@{#38930}

Revert of Add debug code to catch faulty interceptor (patchset #1 id:1 of https://codereview.chromium.org/2265903002/ )

Reason for revert:
found the culprit

Original issue's description:
> Add debug code to catch faulty interceptor
>
> BUG=chromium:625155
> R=jkummerow@chromium.org
>
> Committed: https://crrev.com/d181e6e1e6f95ee9c8005a2ad0fc846142dc8aad
> Cr-Commit-Position: refs/heads/master@{#38775}

TBR=jkummerow@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:625155

Review-Url: https://codereview.chromium.org/2282663002
Cr-Commit-Position: refs/heads/master@{#38929}

Introduce a new TypedOptimization reducer that contains the type
based optimization reduction steps, which are not (directly)
related to lowering JavaScript operators based on types (which is
what JSTypedLowering is supposed to do).

This also addresses a chicken-and-egg problem that we see in the
Octane/Mandreel benchmark where type based constant folding isn't
applied to the numeric comparison operators introduced by the
JSTypedLowering itself, and thus gives up to 10% speedup for the
benchmark.

BUG=v8:5267

Review-Url: https://codereview.chromium.org/2280673003
Cr-Commit-Position: refs/heads/master@{#38928}

This patch:

1. Removes the unecessary inheritance of ParserBaseTraits<Impl>
   in ParserBase<Impl>.
2. Flattens ParserBaseTraits<Impl> and renames it to
   ParserTypes<Impl>.  The Traits parameter/member is renamed to
   Types.
3. Removes unecessary v8::internal:: qualifications from parser
   types.

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

Review-Url: https://codereview.chromium.org/2279773002
Cr-Commit-Position: refs/heads/master@{#38927}

R=marja@chromium.org

Review-Url: https://codereview.chromium.org/2281543002
Cr-Commit-Position: refs/heads/master@{#38926}

This interleaves setting names and values in the scope info. It's a little messy since globals and locals are interleaved, but afaiu globals is going away.

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2272293004
Cr-Commit-Position: refs/heads/master@{#38925}

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

Review-Url: https://codereview.chromium.org/2278973002
Cr-Commit-Position: refs/heads/master@{#38924}

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

Review-Url: https://codereview.chromium.org/2281443003
Cr-Commit-Position: refs/heads/master@{#38923}

They are both accumulated at the same time, and either one already triggered
an error in ValidateExpression. Basically, there were no disjoint uses of
these two error types.

Review-Url: https://codereview.chromium.org/2268173005
Cr-Commit-Position: refs/heads/master@{#38922}

If the parser creates a catch scope, the variable is also added to
ordered_variables_ so just always do that.

Otherwise, it's not possible to create a ScopeInfo for that catch scope

R=verwaest@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2278963002
Cr-Commit-Position: refs/heads/master@{#38921}

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2272083003
Cr-Commit-Position: refs/heads/master@{#38920}

This significantly speed-up the instruction scheduler when the ready list
contains a large number of instruction.

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

Review-Url: https://codereview.chromium.org/2281523002
Cr-Commit-Position: refs/heads/master@{#38919}

Previously the calls to ExpressionClassifier::Accumulate() each chose
slightly different sets of productions to accumulate, and it turned
out that these were in some cases broader than needed and in some
cases less broad.

The existence of some grab-bag production bitmasks like
ExpressionClassifier::ExpressionProductions made this situation more
error-prone (for example, that production was missing AsyncArrowFormalParametersProduction).

This patch removes all "grab-bags" besides AllProductions. In some of
the places where code was using those grab-bags for convenience, it
switches them to use negation of AllProductions. In other, specifically
those having to do with expressions that are disallowed anywhere in
a sub-expression of a parameter list, I've added a new method on
ExpressionClassifier to centralize the logic.

The aforementioned centralization/addition of
AsyncArrowFormalParametersProduction fixes several cases where we were
failing to report an error for 'await' in some contexts; I've added
those test cases.

The patch also narrows all cases to exactly the set or productions
necessary, with a comment on each explaining the choice.

BUG=v8:4483

Review-Url: https://codereview.chromium.org/2271063002
Cr-Commit-Position: refs/heads/master@{#38918}