port 3334b830 (r20813).

original commit message:

    HydrogenCodeStubs consume stack arguments via descriptor.

    All of this is controlled by the CallDescriptor. It's simply the case
    that if you specify less registers than the function arity calls for,
    the rest are assumed to be on the stack.

    Bailout handlers accept these constant stack arguments too.

BUG=

Review URL: https://codereview.chromium.org/1258553002

Cr-Commit-Position: refs/heads/master@{#29836}

Revert of Revert "In RegExp, lastIndex is read with ToLength, not ToInteger" (patchset #1 id:1 of https://codereview.chromium.org/1243053005/)

Reason for revert:
[Sheriff] This causes a breakage with custom snapshot (bisected locally):
http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/1190

Original issue's description:
> Revert "In RegExp, lastIndex is read with ToLength, not ToInteger"
>
> $toLength is slow, causing a 3.8%-8% regression in the Octane RegExp
> benchmark. Reverting this patch brings it back up. To make this change,
> we'll need a faster implementation fo $toLength.
>
> BUG=chromium:513160
> LOG=Y
> R=adamk
>
> Committed: https://crrev.com/477d651c6a978bdf34954048a235895c62dab0ac
> Cr-Commit-Position: refs/heads/master@{#29830}

TBR=adamk@chromium.org,littledan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:513160

Review URL: https://codereview.chromium.org/1254723005

Cr-Commit-Position: refs/heads/master@{#29835}

This is the initial round of optimizations for the
LoadGlobalViaContextStub and StoreGlobalViaContextStub, basically
turning them into platform code stubs to avoid the Crankshaft overhead
in the fast case, and making the runtime interface cheaper.

R=ishell@chromium.org
BUG=chromium:510694
LOG=n

Review URL: https://codereview.chromium.org/1238143002

Cr-Commit-Position: refs/heads/master@{#29834}

Cr-Commit-Position: refs/heads/master@{#29833}

Cr-Commit-Position: refs/heads/master@{#29832}

port 26ffee2c (r29789).

original commit message:

    It's just the same as StoreTransitionDescriptor.

BUG=

Review URL: https://codereview.chromium.org/1253573004

Cr-Commit-Position: refs/heads/master@{#29831}

$toLength is slow, causing a 3.8%-8% regression in the Octane RegExp
benchmark. Reverting this patch brings it back up. To make this change,
we'll need a faster implementation fo $toLength.

BUG=chromium:513160
LOG=Y
R=adamk

Review URL: https://codereview.chromium.org/1243053005

Cr-Commit-Position: refs/heads/master@{#29830}

Rolling v8/tools/clang to 89e7efc0e2c12578ed7217fcf176ec1a4e567b2a

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1256733002

Cr-Commit-Position: refs/heads/master@{#29829}

port 1f295980 (r29787).

original commit message:

    This fixes a recent regression where the register holding the original
    receiver was pushed onto the stack before the internal frame within the
    CallStubInRecordCallTarget helper was created. That in turn confused
    the stack walker when allocations in these stubs failed.

BUG=

Review URL: https://codereview.chromium.org/1247493004

Cr-Commit-Position: refs/heads/master@{#29828}

BUG=chromium:513074
R=bmeurer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1249273003

Cr-Commit-Position: refs/heads/master@{#29827}

Adding CHECKED_OUT_VERSION in test/simdjs so that
the bots don't revert and redownload each time.

LOG=N
BUG=None
TEST=None
R=littledan@chromium.org,machenbach@chromium.org

Review URL: https://codereview.chromium.org/1242863003

Cr-Commit-Position: refs/heads/master@{#29826}

Review URL: https://codereview.chromium.org/1251593009

Cr-Commit-Position: refs/heads/master@{#29825}

TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1246983004 .

Cr-Commit-Position: refs/heads/master@{#29824}

Port 1f295980

Original commit message:
    This fixes a recent regression where the register holding the original
    receiver was pushed onto the stack before the internal frame within the
    CallStubInRecordCallTarget helper was created. That in turn confused
    the stack walker when allocations in these stubs failed.

R=mstarzinger@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=chromium:512711
LOG=N

Review URL: https://codereview.chromium.org/1252493004

Cr-Commit-Position: refs/heads/master@{#29823}

Port 7877c4e0

Original commit message:
    Adds basic support for generation of interpreter bytecode handler code
    snippets. The InterpreterAssembler class exposes a set of low level,
    interpreter specific operations which can be used to build a Turbofan
    graph. The Interpreter class generates a bytecode handler snippet for
    each bytecode by assembling operations using an InterpreterAssembler.

    Currently only two simple bytecodes are supported: LoadLiteral0 and Return.

R=rmcilroy@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1250723003

Cr-Commit-Position: refs/heads/master@{#29822}

Port bc8041dc

Original commit message:
    Previous to this CL, ICs used a slightly different code idiom
    to get to C++ code from generated code than runtime intrinsics,
    using an IC_Utility class that in essence provided exactly
    the same functionality as Runtime::FunctionForId, but in its
    own quirky way.

    This CL unifies the two mechanisms, folding IC_Utility
    away by making all IC entry points in C++ code, e.g. IC
    miss handlers, full-fledged runtime intrinsics. This makes
    it possible to eliminate a bunch of ad-hoc declarations and
    adapters that the IC system had to needlessly re-invent.

    As a bonus and the original reason for this yak-shave:
    IC-related C++ runtime functions are now callable from
    TurboFan.

R=danno@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1249433004

Cr-Commit-Position: refs/heads/master@{#29821}

Port 3334b830

Original commit message;
    All of this is controlled by the CallDescriptor. It's simply the case
    that if you specify less registers than the function arity calls for,
    the rest are assumed to be on the stack.

    Bailout handlers accept these constant stack arguments too.

R=mvstanton@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1256563002

Cr-Commit-Position: refs/heads/master@{#29820}

Port 26ffee2c

Original commit message:
    It's just the same as StoreTransitionDescriptor.

R=mvstanton@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1246143004

Cr-Commit-Position: refs/heads/master@{#29819}

Fix GCMole warning from r29814 (7877c4e0).

BUG=v8:4280
LOG=N
NOTREECHECKS=true
TBR=machenbach,mstarzinger

Review URL: https://codereview.chromium.org/1243893004

Cr-Commit-Position: refs/heads/master@{#29818}

This mostly removes dead code and obsolete special cases from the
RawMachineAssembler::MakeNode helper, that shouldn't be necessary
anymore.

R=rmcilroy@chromium.org

Review URL: https://codereview.chromium.org/1243253005

Cr-Commit-Position: refs/heads/master@{#29817}

According to the ECMA spec, a 24th hour is allowed if the minutes, seconds, and milliseconds are all zero (i.e. it's midnight). Previously, we parsed the date correctly, however, we failed to account in all checks for the possibility of a 24th hour. This CL changes the check to allow a 24th hour if it's exactly midnight.

BUG=chromium:174609
LOG=Y

Review URL: https://codereview.chromium.org/1240093005

Cr-Commit-Position: refs/heads/master@{#29816}

Gets rid of IsSimpleParameterList predicate.

R=mstarzinger@chromium.org, caitpotter88@gmail.com
BUG=

Review URL: https://codereview.chromium.org/1251603004

Cr-Commit-Position: refs/heads/master@{#29815}

Adds basic support for generation of interpreter bytecode handler code
snippets. The InterpreterAssembler class exposes a set of low level,
interpreter specific operations which can be used to build a Turbofan
graph. The Interpreter class generates a bytecode handler snippet for
each bytecode by assembling operations using an InterpreterAssembler.

Currently only two simple bytecodes are supported: LoadLiteral0 and Return.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1239793002

Cr-Commit-Position: refs/heads/master@{#29814}

All of this is controlled by the CallDescriptor. It's simply the case
that if you specify less registers than the function arity calls for,
the rest are assumed to be on the stack.

Bailout handlers accept these constant stack arguments too.

BUG=

Review URL: https://codereview.chromium.org/1250563004

Cr-Commit-Position: refs/heads/master@{#29813}

While at it, remove the notion of INTERNAL variables.

@caitp: Took some parts from your CL, since I was blocked on the temp scope bug.

R=mstarzinger@chromium.org
BUG=512574
LOG=N

Review URL: https://codereview.chromium.org/1250513004

Cr-Commit-Position: refs/heads/master@{#29812}

Previous to this CL, ICs used a slightly different code idiom
to get to C++ code from generated code than runtime intrinsics,
using an IC_Utility class that in essence provided exactly
the same functionality as Runtime::FunctionForId, but in its
own quirky way.

This CL unifies the two mechanisms, folding IC_Utility
away by making all IC entry points in C++ code, e.g. IC
miss handlers, full-fledged runtime intrinsics. This makes
it possible to eliminate a bunch of ad-hoc declarations and
adapters that the IC system had to needlessly re-invent.

As a bonus and the original reason for this yak-shave:
IC-related C++ runtime functions are now callable from
TurboFan.

Review URL: https://codereview.chromium.org/1248303002

Cr-Commit-Position: refs/heads/master@{#29811}

Nobody seems to use it. A good alternative is rlwrap.

R=jochen@chromium.org

Review URL: https://codereview.chromium.org/1250223002

Cr-Commit-Position: refs/heads/master@{#29810}

There are many test names in the v8 code base that prefix
others, which makes it hard to only run those tests.

BUG=chromium:511215
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/1251363002

Cr-Commit-Position: refs/heads/master@{#29809}

BUG=v8:3996
R=jarin@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1249723005

Cr-Commit-Position: refs/heads/master@{#29808}

In particular, rename FormalParameterParsingState and friends to FormalParameters etc.

This should not change any logic, but is a preparatory CL for a bunch of follow-up fixes and clean-ups.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1247443004

Cr-Commit-Position: refs/heads/master@{#29807}

BUG=

Review URL: https://codereview.chromium.org/1253643003

Cr-Commit-Position: refs/heads/master@{#29806}

R=mvstanton@chromium.org

Committed: https://crrev.com/937d4efbf9c399339fdc8e041bec8e80baa7b58f
Cr-Commit-Position: refs/heads/master@{#29798}

Review URL: https://codereview.chromium.org/1255613002

Cr-Commit-Position: refs/heads/master@{#29805}

Use a lock in pages to synchronize sweeper threads to allow others to wait on concurrently swept pages.

BUG=

Review URL: https://codereview.chromium.org/1244353002

Cr-Commit-Position: refs/heads/master@{#29804}

R=adamk@chromium.org
BUG=v8:3330
LOG=N

Review URL: https://codereview.chromium.org/1244423003

Cr-Commit-Position: refs/heads/master@{#29803}

Revert of Reduce duplicate code in full-codegen across platforms. (patchset #1 id:1 of https://codereview.chromium.org/1255613002/)

Reason for revert:
breaks mips

Original issue's description:
> Reduce duplicate code in full-codegen across platforms.
>
> R=mvstanton@chromium.org
>
> Committed: https://crrev.com/937d4efbf9c399339fdc8e041bec8e80baa7b58f
> Cr-Commit-Position: refs/heads/master@{#29798}

TBR=mvstanton@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1252513004

Cr-Commit-Position: refs/heads/master@{#29802}

The code is unmaintained and full of errors...
but this CL wipes them all away.

Nobody seems to use it anyways.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1243213004

Cr-Commit-Position: refs/heads/master@{#29801}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1248263003

Cr-Commit-Position: refs/heads/master@{#29800}

Using the GraphBuilder base class forces each node creation to go
through a virtual function dispatch just for the sake of saving the
duplication of the NewNode helper methods. In total that added up to
saving minus (sic!) six lines of code.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1252093002

Cr-Commit-Position: refs/heads/master@{#29799}

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1255613002

Cr-Commit-Position: refs/heads/master@{#29798}

There is already non-throwing version FrameMirror.restart and RestartFrame in the livedit-debugger.js just adds a throwing wrapper around it.

Also NEEDS_STEP_IN_PROPERTY_NAME was removed, the client code can decide based on the stack_modified field if "step in" is required.

Chromium side was fixed in https://codereview.chromium.org/1249013002/

BUG=None
LOG=N

Review URL: https://codereview.chromium.org/1247363002

Cr-Commit-Position: refs/heads/master@{#29797}