This makes sure that targets depending on v8_libplatform
apply the required config.

BUG=chromium:474921
NOTRY=true

Review-Url: https://codereview.chromium.org/1962423003
Cr-Commit-Position: refs/heads/master@{#36170}

R=ahaas@chromium.org,bradnelson@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/1968943002
Cr-Commit-Position: refs/heads/master@{#36169}

BUG=chromium:609134
R=verwaest@chromium.org

Review-Url: https://codereview.chromium.org/1966853004
Cr-Commit-Position: refs/heads/master@{#36168}

The type feedback for load and store ICs might be polluted because of
different/conflicting call sites, but yet we can utilize some of the
static information that is available in the graph to determine the
effective receiver map, or at least filter out impossible receiver maps
from the feedback by looking at the transition trees.

This is similar to what Crankshaft does in ComputeReceiverTypes, but
more general and less hacky.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/1972563002
Cr-Commit-Position: refs/heads/master@{#36167}

BUG=chromium:474921
NOTRY=true

Review-Url: https://codereview.chromium.org/1966933003
Cr-Commit-Position: refs/heads/master@{#36166}

Revert of [debugger] Prevent shared function info duplicates (patchset #1 id:1 of https://codereview.chromium.org/1958153004/ )

Reason for revert:
[Sheriff] Speculative revert for https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/6700

Yang can tell you how to do the blink rebase dance if it was this CL.

Original issue's description:
> [debugger] Prevent shared function info duplicates
>
> Clear the list of shared function infos attached to a script before
> compiling for live edit in order to avoid duplicates. This was lost in
> 058deb27.
>
> R=yangguo@chromium.org
> BUG=
>
> Committed: https://crrev.com/592432977e6213364c243c396060c7b64687ddc3
> Cr-Commit-Position: refs/heads/master@{#36155}

TBR=yangguo@chromium.org,jgruber@google.com
# 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/1973433002
Cr-Commit-Position: refs/heads/master@{#36165}

R=ahaas@chromium.org,bradnelson@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/1971693002
Cr-Commit-Position: refs/heads/master@{#36164}

BUG=chromium:580959
LOG=n

Review-Url: https://codereview.chromium.org/1972553002
Cr-Commit-Position: refs/heads/master@{#36163}

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

And in addition some code cleanup.

BUG=chromium:596055
LOG=N

Review-Url: https://codereview.chromium.org/1965133002
Cr-Commit-Position: refs/heads/master@{#36162}

By now the runtime entry function in question is a duplicate of the
existing Runtime_ToFastProperties function. This just gets rid of the
duplication.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1963973003
Cr-Commit-Position: refs/heads/master@{#36161}

R=jgruber@chromium.org
BUG=chromium:609046
LOG=N

Review-Url: https://codereview.chromium.org/1957303002
Cr-Commit-Position: refs/heads/master@{#36160}

X87: [turbofan] Take the immediate size in account when narrowing ia32/x64 word comparison operators.

  port 2da70f85 (r36136)

  original commit message:
  Trying to re-land http://crrev.com/1948453002 after fixing assembler-x64.cc in http://crrev.com/1962563003.

  Before this patch, we would emit a cmp or test with a memory operand only if both of the operands in the IR were loads.
  Now if either of them is a load and the other one is an immediate, we can use a memory operand if the load representation machine size is wide enough to represent the latter.

BUG=

Review-Url: https://codereview.chromium.org/1967913003
Cr-Commit-Position: refs/heads/master@{#36159}

  port 61f5fbbb (r36133)

  original commit message:
  The new allocation folding implementation avoids fragmentation between folded allocation. As a consequence, our heap will always be iterable i.e. we do not have to perform a garbage collection
  before iterating the heap.

BUG=

Review-Url: https://codereview.chromium.org/1969553003
Cr-Commit-Position: refs/heads/master@{#36158}

Up until now we had two places where we did the function prototype
folding, once in the Typer and once in JSTypedLowering. Put this logic
into JSNativeContextSpecialization instead.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/1965293002
Cr-Commit-Position: refs/heads/master@{#36157}

This removes the explicit disabling of optimization for eval code. Such
code can by now be optimized by TurboFan. Note that the usual heuristics
in the AstNumberingVisitor still apply and will be used to choose the
effective optimization backend.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1962103003
Cr-Commit-Position: refs/heads/master@{#36156}

Clear the list of shared function infos attached to a script before
compiling for live edit in order to avoid duplicates. This was lost in
058deb27.

R=yangguo@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/1958153004
Cr-Commit-Position: refs/heads/master@{#36155}

Make JSCreateArguments eliminatable, and remove the need for frame
states on JSCreateArguments nodes being lowered to (optimized) stub
calls. Only the runtime fallback needs a frame state, because in that
case we need to ask the deoptimizer for arguments to inlined functions.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/1965013005
Cr-Commit-Position: refs/heads/master@{#36154}

Rolling v8/build to 1b63b7ad545e5946c43fbc4498d790de54578025

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

Review-Url: https://codereview.chromium.org/1969673003
Cr-Commit-Position: refs/heads/master@{#36153}

The data from UseCounters are in--V8's custom Promise methods are not
in wide use on the web (<.002%). Therefore, this patch removes them.
That includes:
- Promise.prototype.chain
- Promise.defer -- the most widely used of the bunch
- Promise.accept

For now, those methods are still available by checking the "disable
latest stable JavaScript features" flag, or --promise-extra at the
command line, but I expect them to be fully removable.

R=adamk
CC=rossberg
BUG=v8:3238,v8:4633

Review-Url: https://codereview.chromium.org/1965183002
Cr-Commit-Position: refs/heads/master@{#36152}

Globals used to be hole-initialized in the case of toplevel legacy
const declarations. But now that the only use of legacy const is
for sloppy function expression names, we can unconditionally
initialize globals to undefined instead of the_hole.

Review-Url: https://codereview.chromium.org/1964993002
Cr-Commit-Position: refs/heads/master@{#36151}

When the rewriter moves a temporary variable between scopes, it must
be sure to maintain the order, so that the rewritten order is the
same as it would have been without rewriting.

To expose the difference in behavior, this patch removes the superfluous
visitation of ForOfStatement::each() from AstExpressionVisitor, which
happened to be the only thing keeping all the temporaries in order
in mjsunit/harmony/regress/regress-crbug-578038.js. Without the proper
order, this test would fail under --stress-opt, because the ".for"
variable (behind the "each" proxy) would get two different positions
in the scope, one on first parse (with rewriting) and the other on
second parse (lazy parsing for optimization).

A follow-up patch will remove each() and iterable() from ForOfStatement
altogether, but I wanted to keep this patch small to highlight exactly
the bit of code needed to make the test pass when not visiting each().

BUG=v8:4791
LOG=n

Review-Url: https://codereview.chromium.org/1784893003
Cr-Commit-Position: refs/heads/master@{#36150}

Old code failed to walk over deleted elements, instead treating
deleted elements as "undefined" in the output array.

This is the Map equivalent of commit 2d9bfe9a.

Also micro-optimized the loops to avoid an extra call to KeyAt()
and used a direct hole comparison instead of calling IsTheHole().

R=cbruni@chromium.org
BUG=v8:4946
LOG=y

Review-Url: https://codereview.chromium.org/1965593002
Cr-Commit-Position: refs/heads/master@{#36149}

[wasm] Introduce special bytecodes for asm.js division/remainder instead of relying on module state.

R=ahaas@chromium.org, bradnelson@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/1968493002
Cr-Commit-Position: refs/heads/master@{#36148}

As discussed at https://groups.google.com/d/msg/v8-dev/4EWhm5hltUs/daJgVxHHBQAJ,
this check is not useful, and mostly serves to be a speed bump that simply forces
developers to add "LOG=N" to their commits.

The ChangeLog is already sparse enough (see detail stats at
https://groups.google.com/d/msg/v8-dev/4EWhm5hltUs/Z276qyh8CQAJ) that it's
very unlikely to be a useful signal compared to reading the commit log directly.

LOG=y
NOTRY=true

Review-Url: https://codereview.chromium.org/1956993002
Cr-Commit-Position: refs/heads/master@{#36147}

Renames IsDouble* predicates to IsFP*.
Adds specific IsFloat*, IsDouble*, and IsSimd128* predicates.
Adds specific GetFloatRegister, GetDoubleRegister, and
GetSimd128Register methods.

This is mostly a mechanical renaming of IsDouble* to IsFP* methods.

This shouldn't change code generation at all. All fp registers are still
treated as double registers.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/1959763002
Cr-Commit-Position: refs/heads/master@{#36146}

Adds a tool which enables annotation of the disassembly of bytecode handlers
based on perf output.

BUG=4899
LOG=N

Review-Url: https://codereview.chromium.org/1945673002
Cr-Commit-Position: refs/heads/master@{#36145}

BUG=chromium:610210
LOG=N

Review-Url: https://codereview.chromium.org/1963633002
Cr-Commit-Position: refs/heads/master@{#36144}

Revert of [heap] Fine-grained JSArrayBuffer tracking (patchset #7 id:200001 of https://codereview.chromium.org/1936233002/ )

Reason for revert:
Breaks readonly test
  https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Linux/builds/10121

Original issue's description:
> [heap] Fine-grained JSArrayBuffer tracking
>
> Track based on JSArrayBuffer addresses instead of the attached backing store.
> This way we can later on iterate buffers on a single page.
>
> BUG=chromium:581412
> LOG=N
> R=jochen@chromium.org, hpayer@chromium.org
>
> Committed: https://crrev.com/4cdf71e2d07c038d7af84e41c6e6d0093af0f0de
> Cr-Commit-Position: refs/heads/master@{#36140}

TBR=hpayer@chromium.org,jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:581412

Review-Url: https://codereview.chromium.org/1961403002
Cr-Commit-Position: refs/heads/master@{#36143}

BUG=

Review-Url: https://codereview.chromium.org/1963853004
Cr-Commit-Position: refs/heads/master@{#36142}

On AIX64 pthread_t is of type unsigned int (4bytes),
using intptr_t instead when casting a pointer.

R=lpy@chromium.org, jochen@chromium.org, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/1938833002
Cr-Commit-Position: refs/heads/master@{#36141}

Track based on JSArrayBuffer addresses instead of the attached backing store.
This way we can later on iterate buffers on a single page.

BUG=chromium:581412
LOG=N
R=jochen@chromium.org, hpayer@chromium.org

Review-Url: https://codereview.chromium.org/1936233002
Cr-Commit-Position: refs/heads/master@{#36140}

Adds `strict_function_without_prototype_map` to DCHECK whitelist

BUG=
LOG=N
R=littledan@chromium.org, jochen@chromium.org, jkummerow@chromium.org

Review-Url: https://codereview.chromium.org/1964593004
Cr-Commit-Position: refs/heads/master@{#36139}

BUG=chromium:609107
R=machenbach@chromium.org
LOG=n

Review-Url: https://codereview.chromium.org/1962253002
Cr-Commit-Position: refs/heads/master@{#36138}

Rather than pushing zero for the initial bytecode offset, we should push the
offset of the first bytecode handler, Smi tagged. This fixes the line number
for the top stack frame on overflow errors.

BUG=v8:4981
LOG=N

Review-Url: https://codereview.chromium.org/1950913004
Cr-Commit-Position: refs/heads/master@{#36137}

Trying to re-land http://crrev.com/1948453002 after fixing assembler-x64.cc in http://crrev.com/1962563003.

Before this patch, we would emit a cmp or test with a memory operand only if both of the operands in the IR were loads. Now if either of them is a load and the other one is an immediate, we can use a memory operand if the load representation machine size is wide enough to represent the latter.

Review-Url: https://codereview.chromium.org/1968453002
Cr-Commit-Position: refs/heads/master@{#36136}

Revert of [build] Use -O2 on linux by default (patchset #1 id:1 of https://codereview.chromium.org/1963693004/ )

Reason for revert:
Causes regressions.

Original issue's description:
> [build] Use -O2 on linux by default
>
> This switches O2 -> O3 to match chromium's configuration.
>
> This makes the difference between gn and gyp a bit smaller
> before switching.
>
> BUG=chromium:474921
> LOG=n
>
> Committed: https://crrev.com/a37ab71e343b8cc24df05868b941a49e0c271376
> Cr-Commit-Position: refs/heads/master@{#36124}

TBR=jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:474921

Review-Url: https://codereview.chromium.org/1958253004
Cr-Commit-Position: refs/heads/master@{#36135}

In the bytecode graphbuilder, translate the two generator-specific
bytecodes as a couple of runtime calls for now.

BUG=v8:4907
LOG=n

Review-Url: https://codereview.chromium.org/1957393004
Cr-Commit-Position: refs/heads/master@{#36134}

The new allocation folding implementation avoids fragmentation between folded allocation. As a consequence, our heap will always be iterable i.e. we do not have to perform a garbage collection before iterating the heap.

BUG=chromium:580959
LOG=n

Review-Url: https://codereview.chromium.org/1899813003
Cr-Commit-Position: refs/heads/master@{#36133}

Review-Url: https://codereview.chromium.org/1962133003
Cr-Commit-Position: refs/heads/master@{#36132}

BUG=v8:4915
LOG=N

Review-Url: https://codereview.chromium.org/1964643002
Cr-Commit-Position: refs/heads/master@{#36131}