This removes the weird COMPARE and COMPARE_STRONG JavaScript builtins
and replaces them with a proper C++ implementation in Object::Compare
and appropriate wrappers Object::LessThan, Object::GreaterThan, and
friends that are intended to be used by a true/false returning CompareIC
in the future, as well as the interpreter.  As a short-term solution we
provide %Compare and %Compare_Strong entry points for the current
CompareIC that return the appropriate integer values expected by
fullcodegen currently.

Now the Abstract Relational Comparison is also using the correct
ToPrimitive implementation, which properly supports @@toPrimitive.

BUG=v8:4307
LOG=n

Review URL: https://codereview.chromium.org/1350113002

Cr-Commit-Position: refs/heads/master@{#30816}

Rolling v8/tools/clang to 0e7dbd100f91096de47919f394ac0b32dd7c21a2

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

Review URL: https://codereview.chromium.org/1355633003

Cr-Commit-Position: refs/heads/master@{#30815}

Defines and uses a kMaxSafeInteger macro (which expands to the constant
2^53-1) instead of accessing Number.MAX_SAFE_INTEGER. This saves loading
the attribute from the Number object, which is slightly faster. This also
makes it clearer from reading the code that tha value being compared is
constant.

BUG=
LOG=N

Review URL: https://codereview.chromium.org/1353953002

Cr-Commit-Position: refs/heads/master@{#30814}

Port d5bbd45f

Original commit message:
    Currently Execution::Call (and friends) still duplicate a lot of the
    Call sequence logic that should be encapsulated in the Call and
    CallFunction builtins. So the plan now is to switch Execution::Call
    to accept any Callable and just pass that through to the Call builtin.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=v8:4413
LOG=n

Review URL: https://codereview.chromium.org/1347213003

Cr-Commit-Position: refs/heads/master@{#30813}

Merge ShiftRightArithmetic and ShiftRightLogical Functions.

BUG=v8:4124
LOG=Y

Review URL: https://codereview.chromium.org/1351663002

Cr-Commit-Position: refs/heads/master@{#30812}

Uncomment the if (!serializer_enabled()) check which I accidentially left
commented out after debugging during the CLs development.

BUG=chromium:532969
R=bmeurer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1351943002

Cr-Commit-Position: refs/heads/master@{#30811}

Port 54bab695

Original commit message:
    Move the implementation of the Abstract Equality Comparison to the
    runtime and thereby remove the EQUALS dispatcher builtin. Also remove
    the various runtime entry points that were only used to support the
    EQUALS builtin.

    Now the Abstract Equality Comparison is also using the correct
    ToPrimitive implementation, which properly supports @@toPrimitive.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=v8:4307
LOG=n

Review URL: https://codereview.chromium.org/1357493002

Cr-Commit-Position: refs/heads/master@{#30810}

Port a3d6f6cc

Original commit message:
    Implement the String constructor completely as native builtin,
    avoiding the need to do gymnastics in JavaScript builtin to
    properly detect the no argument case (which is different from
    the undefined argument case) and also allowing to just
    tailcall through to ToString or SymbolDescriptiveString for
    the common case. Also the JavaScript builtin was misleading
    since the case for construct call was unused, but could be
    triggered in a wrong way once we support tail calls from
    constructor functions.

    This refactoring allows us to properly implement subclassing
    for String builtins, once we have the correct initial_map on
    derived classes (it's merely a matter of using NewTarget
    instead of the target register now).

    This introduces a new %SymbolDescriptiveString runtime
    entry, which is also used by Symbol.toString() now.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1354663002

Cr-Commit-Position: refs/heads/master@{#30809}

Currently Execution::Call (and friends) still duplicate a lot of the
Call sequence logic that should be encapsulated in the Call and
CallFunction builtins. So the plan now is to switch Execution::Call
to accept any Callable and just pass that through to the Call builtin.

CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_dbg
R=jarin@chromium.org
BUG=v8:4413
LOG=n

Committed: https://crrev.com/359645f48156e15f235e9a9ede7910e0bcd9ae45
Cr-Commit-Position: refs/heads/master@{#30791}

Review URL: https://codereview.chromium.org/1353723002

Cr-Commit-Position: refs/heads/master@{#30808}

Port b5588f48

Original commit message:
    There isn't a plan to turn it on soon, so we'll take it out in favor of cleaner code.

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

Review URL: https://codereview.chromium.org/1347253003

Cr-Commit-Position: refs/heads/master@{#30807}

Port 905e008c

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=v8:4423
LOG=N

Review URL: https://codereview.chromium.org/1350923003

Cr-Commit-Position: refs/heads/master@{#30806}

R=machenbach@chromium.org,jochen@chromium.org
NOTRY=True
BUG=

Review URL: https://codereview.chromium.org/1357453002

Cr-Commit-Position: refs/heads/master@{#30805}

Typed arrays from the snapshot start out in the young space but they
all seem to end up in the old space sooner or later anyway.  Let's
expedite that by allocating them in the old space right away.

Review URL: https://codereview.chromium.org/1347263003

Cr-Commit-Position: refs/heads/master@{#30804}

R=hpayer@chromium.org
BUG=chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1356663002

Cr-Commit-Position: refs/heads/master@{#30803}

Review URL: https://codereview.chromium.org/1347073004

Cr-Commit-Position: refs/heads/master@{#30802}

NOTRY=true

Review URL: https://codereview.chromium.org/1351093002

Cr-Commit-Position: refs/heads/master@{#30801}

BUG=chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1341973003

Cr-Commit-Position: refs/heads/master@{#30800}

Review URL: https://codereview.chromium.org/1352803002

Cr-Commit-Position: refs/heads/master@{#30799}

Now run-tests.py understands "suite/foo/bar" with forward slashes for
command-line test selection on all test suites on all platforms.

Previously, file-based suites like mjsunit also accepted "mjsunit/foo\bar";
that behavior is sacrificed here in favor of unification. For the cctest
suite, OTOH, it wasn't possible on Windows to select specific tests at all.

Original review: https://codereview.chromium.org/1348653003/

This reverts commit 5f44a910.

NOTRY=true

Review URL: https://codereview.chromium.org/1356613002

Cr-Commit-Position: refs/heads/master@{#30798}

The core bottleneck lies in N-square cost of array union. Depending on the size
of the arrays involved it makes sense to rely on a hash-set/table for the lookup.

LOG=N
BUG=v8:2904

Review URL: https://codereview.chromium.org/1316213008

Cr-Commit-Position: refs/heads/master@{#30797}

This reverts commit 7a0a0b8b.

- The number of parallel tasks is still 1, i.e., we only compact on the main
  thread.
- Remove emergency memory (PagedSpace, and CodeRange)
- Introduce partial compaction of pages.
- Logic for multiple tasks is in place.

BUG=chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1356533002

Cr-Commit-Position: refs/heads/master@{#30796}

Revert of [test] Fix cctest path separators on Windows (patchset #2 id:20001 of https://codereview.chromium.org/1348653003/ )

Reason for revert:
mozilla tests are failing on Windows

Original issue's description:
> [test] Fix cctest path separators on Windows
>
> Now run-tests.py understands "suite/foo/bar" with forward slashes for
> command-line test selection on all test suites on all platforms.
>
> Previously, file-based suites like mjsunit also accepted "mjsunit/foo\bar";
> that behavior is sacrificed here in favor of unification. For the cctest
> suite, OTOH, it wasn't possible on Windows to select specific tests at all.
>
> Committed: https://crrev.com/b36cfdb39ae648b49a1396c4f669df9b1f57996c
> Cr-Commit-Position: refs/heads/master@{#30794}

TBR=machenbach@google.com,machenbach@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1349163002

Cr-Commit-Position: refs/heads/master@{#30795}

Now run-tests.py understands "suite/foo/bar" with forward slashes for
command-line test selection on all test suites on all platforms.

Previously, file-based suites like mjsunit also accepted "mjsunit/foo\bar";
that behavior is sacrificed here in favor of unification. For the cctest
suite, OTOH, it wasn't possible on Windows to select specific tests at all.

Review URL: https://codereview.chromium.org/1348653003

Cr-Commit-Position: refs/heads/master@{#30794}

Revert of [runtime] Initial step towards switching Execution::Call to callable. (patchset #1 id:1 of https://codereview.chromium.org/1353723002/ )

Reason for revert:
[Sheriff] Causes a dcheck failure in layout tests (and some test changes in release):
https://storage.googleapis.com/chromium-layout-test-archives/V8-Blink_Linux_64__dbg_/1442/layout-test-results/virtual/android/fullscreen/api/element-request-fullscreen-top-stderr.txt
from
http://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064%20%28dbg%29/builds/1442

Original issue's description:
> [runtime] Initial step towards switching Execution::Call to callable.
>
> Currently Execution::Call (and friends) still duplicate a lot of the
> Call sequence logic that should be encapsulated in the Call and
> CallFunction builtins. So the plan now is to switch Execution::Call
> to accept any Callable and just pass that through to the Call builtin.
>
> CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_dbg
> R=jarin@chromium.org
> BUG=v8:4413
> LOG=n
>
> Committed: https://crrev.com/359645f48156e15f235e9a9ede7910e0bcd9ae45
> Cr-Commit-Position: refs/heads/master@{#30791}

TBR=jarin@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4413

Review URL: https://codereview.chromium.org/1346763005

Cr-Commit-Position: refs/heads/master@{#30793}

BUG=v8:4392
LOG=Y

Review URL: https://codereview.chromium.org/1354523003

Cr-Commit-Position: refs/heads/master@{#30792}

Currently Execution::Call (and friends) still duplicate a lot of the
Call sequence logic that should be encapsulated in the Call and
CallFunction builtins. So the plan now is to switch Execution::Call
to accept any Callable and just pass that through to the Call builtin.

CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_dbg
R=jarin@chromium.org
BUG=v8:4413
LOG=n

Review URL: https://codereview.chromium.org/1353723002

Cr-Commit-Position: refs/heads/master@{#30791}

R=jarin
BUG=

Review URL: https://codereview.chromium.org/1343933002

Cr-Commit-Position: refs/heads/master@{#30790}

BUG=chromium:532784
LOG=n

Review URL: https://codereview.chromium.org/1347363002

Cr-Commit-Position: refs/heads/master@{#30789}

Revert of [heap] Introduce parallel compaction algorithm. (patchset #9 id:160001 of https://codereview.chromium.org/1343333002/ )

Reason for revert:
Check failed: https://chromegw.corp.google.com/i/client.v8/builders/V8%20Win64/builds/5535/steps/Check%20%28flakes%29/logs/IndependentWeakHandle

Original issue's description:
> [heap] Introduce parallel compaction algorithm.
>
> - The number of parallel tasks is still 1, i.e., we only compact on the main
>   thread.
> - Remove emergency memory (PagedSpace, and CodeRange)
> - Introduce partial compaction of pages.
> - Logic for multiple tasks is in place.
>
> BUG=chromium:524425
> LOG=N
>
> Committed: https://crrev.com/61ea4f55616d3f7bc2ce049a678f16f7475e03e0
> Cr-Commit-Position: refs/heads/master@{#30787}

TBR=hpayer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:524425

Review URL: https://codereview.chromium.org/1347873003

Cr-Commit-Position: refs/heads/master@{#30788}

- The number of parallel tasks is still 1, i.e., we only compact on the main
  thread.
- Remove emergency memory (PagedSpace, and CodeRange)
- Introduce partial compaction of pages.
- Logic for multiple tasks is in place.

BUG=chromium:524425
LOG=N

Review URL: https://codereview.chromium.org/1343333002

Cr-Commit-Position: refs/heads/master@{#30787}

Revert "[profiler] Make no frame region detection code more robust", "Fix ASAN after r30777" and "Fix MSAN warning after r30777 (try 2)"

This reverts commits 12c7bc9a,
cb0b3592, and
a6e00c6a, because they introduced weird
flaky crashes in random places now at least in the arm simulator, where
it see that quite often now on different change sets, i.e. see

http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/8138/steps/Check%20%28flakes%29/logs/LoadICFastApi_DirectC..

and

https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20mipsel%20-%20sim/builds/2566/steps/Check%20%28flakes%29/logs/LoadICFastApi_DirectC..

for example.

TBR=alph@chromium.org
BUG=chromium:529931
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
LOG=N

Review URL: https://codereview.chromium.org/1354573002

Cr-Commit-Position: refs/heads/master@{#30786}

TBR=bmeurer,yurys
NOTRY=true

Review URL: https://codereview.chromium.org/1348493003

Cr-Commit-Position: refs/heads/master@{#30785}

Small spelling fix.

Review URL: https://codereview.chromium.org/1352673002

Cr-Commit-Position: refs/heads/master@{#30784}

Avoiding unnecessarily traversing conflicts when doing weight
comparisons. This reduced compile time regressions from a few
multiples to under 10% - at least for zlib.

Review URL: https://codereview.chromium.org/1346263004

Cr-Commit-Position: refs/heads/master@{#30783}

Rolling v8/tools/clang to eea56c7ed84778edadbcd43f06793b0311a56b28

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

Review URL: https://codereview.chromium.org/1350993003

Cr-Commit-Position: refs/heads/master@{#30782}

port 1e00bb57 (r30737).

original commit message:

    (reason for revert/reland: patch incorrectly left --vector-stores flag
     on, helpfully revealing some gcstress issues to look at, but they
     don't need to block this CL).

    Some pretty hacky code was used to carry out the tail-call
    handler dispatch on ia32 vector stores due to a lack
    of free registers. It really tanks performance. A better
    approach is to use a virtual register on the isolate.

BUG=

Review URL: https://codereview.chromium.org/1344383002

Cr-Commit-Position: refs/heads/master@{#30781}

port 54bab695 (r30747).

original commit message:

    Move the implementation of the Abstract Equality Comparison to the
    runtime and thereby remove the EQUALS dispatcher builtin. Also remove
    the various runtime entry points that were only used to support the
    EQUALS builtin.

    Now the Abstract Equality Comparison is also using the correct
    ToPrimitive implementation, which properly supports @@toPrimitive.

BUG=

Review URL: https://codereview.chromium.org/1349623002

Cr-Commit-Position: refs/heads/master@{#30780}

TBR=bmeurer,yurys
NOTRY=true

Review URL: https://codereview.chromium.org/1349953002

Cr-Commit-Position: refs/heads/master@{#30779}

Add an assertion that allocated_bytes >= 0 in IncrementalMark::Step and then
make it pass. We were not being diligent in maintaining top_on_previous_step_
and as a result inaccurate, and even negative values of allocated_bytes were
being reported to Step.

BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1274453002

Cr-Commit-Position: refs/heads/master@{#30778}

Upon collection of the stack trace if the current PC falls into
the frame building code, the top frame might be in a non-consistent
state. That leads to some of the frames could be missing from the
stack trace.

The patch makes it check instructions under current PC and if they
look like the frame setup/destroy code, it skips the entire sample.

Support for x86/x64

BUG=chromium:529931
LOG=N

Review URL: https://codereview.chromium.org/1341413002

Cr-Commit-Position: refs/heads/master@{#30777}