MIPS R6 introduced new behavior for handling of NaN values
for TRUNC, FLOOR, CEIL and CVT instructions. Adding support for
the new behavior in MIPS and MIPS64 simulators. Fixing tests
for MIPS and MIPS64 to align them with the new behavior.

BUG=

Review URL: https://codereview.chromium.org/1488613007

Cr-Commit-Position: refs/heads/master@{#32499}

This is the first part of escape analysis for turbofan.
At the moment, there is no deopt support, and support
for loops is partial (only binary Phis are handled).

The CL includes 4 unittests.

There are also 8 new mjsunit tests, some of which are
skiped as they require features not yet implemented.

BUG=v8:4586
LOG=n

Review URL: https://codereview.chromium.org/1457683003

Cr-Commit-Position: refs/heads/master@{#32498}

non-constructors are not allowed to have initial maps. The optimizing compilers used to add initial maps unconditionally to functions used as right-hand-side in instanceof.

BUG=

Review URL: https://codereview.chromium.org/1490003003

Cr-Commit-Position: refs/heads/master@{#32497}

And use it to fix Object.keys() for proxies.

BUG=v8:1543
LOG=n
R=cbruni@chromium.org

Review URL: https://codereview.chromium.org/1488873003

Cr-Commit-Position: refs/heads/master@{#32496}

1.  Let X be the aborted slot (slot in an evacuated object in an aborted page)
2.  Assume X contains pointer to Y and Y is in the new space, so X is in the
    store buffer.
3.  Store buffer rebuilding will not filter out X (it checks InNewSpace(Y)).
4.  The current mark-sweep finishes. The slot X is in free space and is also in
    the store buffer.
5.  A string of length 9 "abcdefghi" is allocated in the new space. The string
    looks like |MAP|LENGTH|hgfedcba|NNNNNNNi| in memory, where NNNNNNN is
    previous garbage. Let's assume that NNNNNNN0 was pointing to a new space
    object before.
6.  Scavenge happens.
7.  Slot X is still in free space and in store buffer. [It causes scavenge of
    the object Y in
    store_buffer()->IteratePointersToNewSpace(&Scavenger::ScavengeObject). But
    it is not important].
8.  Our string is promoted and is allocated over the slot X, such that NNNNNNNi
    is written in X.
9.  The scavenge finishes.
9.  Another scavenge starts.
10. We crash in
    store_buffer()->IteratePointersToNewSpace(&Scavenger::ScavengeObject) when
    processing slot X, because it doesn't point to valid map.

BUG=chromium:524425,chromium:564498
LOG=N
R=hpayer@chromium.org, ulan@chromium.org

Review URL: https://codereview.chromium.org/1493653002

Cr-Commit-Position: refs/heads/master@{#32495}

R=bmeurer@chromium.org
BUG=v8:4581
LOG=N

Review URL: https://codereview.chromium.org/1495473002

Cr-Commit-Position: refs/heads/master@{#32494}

BUG=chromium:500934
LOG=N
TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1486343003

Cr-Commit-Position: refs/heads/master@{#32493}

  port 74434403 (r32261)

  original commit message:
  I implemented the optional Float32RoundDown operator on x64, ia32, arm,
  and arm64.

  For arm I also had to adjust the simulator.

BUG=

Review URL: https://codereview.chromium.org/1490113003

Cr-Commit-Position: refs/heads/master@{#32492}

Sanitize ConstructStub handling and add a test case to ensure that the
Symbol constructor is using the correct context.

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

Review URL: https://codereview.chromium.org/1489323002

Cr-Commit-Position: refs/heads/master@{#32491}

  port dffecf31 (r32005)

  original commit message:
  The TiesEven rounding mode rounds float64 numbers to the nearest
  integer. If there are two nearest integers, then the number is rounded
  to the even one.  This is the default rounding mode according to
  IEEE~754.

  I implemented the operator on ia32, x64, arm, arm64, mips, and mips64.

  I think there is a bug in the current implementation of the ppc
  simulator, which kept me from implementing the operator on ppc.
  According to my understanding of the ppc instruction manual, the FRIN
  instruction provides the right behavior for Float64RoundTiesEven. In the
  simulator, however, FRIN provides a different semantics. If there are
  two nearest integers, then the simulator returns the one which is
  further away form 0.

BUG=

Review URL: https://codereview.chromium.org/1486323003

Cr-Commit-Position: refs/heads/master@{#32490}

  port d2f78c6b (r32476)

  original commit message:
  This becomes visible if an exception is thrown by the constructor.
  We do this on "new Array(3.5)", throwing a RangeError.

BUG=

Review URL: https://codereview.chromium.org/1491153002

Cr-Commit-Position: refs/heads/master@{#32489}

  port 66d5a9df (r32452)

  original commit message:
  CallIC and CallConstructStub look so alike, at least in the feedback they gather even if the implementation differs...and CallIC has such a nice way of surfacing the feedback (CallICNexus), that there

BUG=

Review URL: https://codereview.chromium.org/1491063003

Cr-Commit-Position: refs/heads/master@{#32488}

  port 2f559f21 (r32449)

  original commit message:

BUG=

Review URL: https://codereview.chromium.org/1494453002

Cr-Commit-Position: refs/heads/master@{#32487}

  port c83db2d0 (r32456)

  original commit message:

BUG=

Review URL: https://codereview.chromium.org/1487293002

Cr-Commit-Position: refs/heads/master@{#32486}

Rolling v8/build/gyp to e2313c02ad7b6d589b38fe578f5d39970a9bbc20

Rolling v8/tools/clang to 3cc3dac50b26c67176bfed187a300741f31651bf

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

Review URL: https://codereview.chromium.org/1491133002

Cr-Commit-Position: refs/heads/master@{#32485}

  port 1389b9f5 (r32004)

  original commit message:
  I implemented it on x64, ia32, arm, arm64, mips, mips64, and ppc.

BUG=

Review URL: https://codereview.chromium.org/1488993002

Cr-Commit-Position: refs/heads/master@{#32484}

We currently use the outdated contexts list provided by the serializer
to update the receiver (the global proxy) in script contexts. However,
this is not actually necessary, since the global proxy is passed to the
deserializer and replaced as we deserialize.

Originally, the outdated contexts list is to update the global object
field in contexts. This was necessary since at the time the deserializer
creates the native context, the global object has not yet been created.
But the global proxy already exists.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1488873004

Cr-Commit-Position: refs/heads/master@{#32483}

Port 2f559f21

R=yangguo@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1490923004

Cr-Commit-Position: refs/heads/master@{#32482}

Port 66d5a9df

Original commit message:
    CallIC and CallConstructStub look so alike, at least in the feedback
    they gather even if the implementation differs...and CallIC has such
    a nice way of surfacing the feedback (CallICNexus), that there is a
    request to make CallConstructStub look analogous. Enter ConstructICStub.

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

Review URL: https://codereview.chromium.org/1485303002

Cr-Commit-Position: refs/heads/master@{#32481}

Port d2f78c6b

Original commit message:
    This becomes visible if an exception is thrown by the constructor.
    We do this on "new Array(3.5)", throwing a RangeError.

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

Review URL: https://codereview.chromium.org/1484423003

Cr-Commit-Position: refs/heads/master@{#32480}

TEST=unittests/InstructionSelectorTest.Word(32|64)AndToClearBits
BUG=

Review URL: https://codereview.chromium.org/1485023004

Cr-Commit-Position: refs/heads/master@{#32479}

Xori instruction can only have unisgned 16-bit immediates for right input,
as such it is not suitable for bit negation on mips.

TEST=unittests/InstructionSecetorTest.Word(32|64)XorMinusOneWithParameter
BUG=

Review URL: https://codereview.chromium.org/1485833003

Cr-Commit-Position: refs/heads/master@{#32478}

BUG=v8:4585
LOG=N
R=adamk@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/1488043002

Cr-Commit-Position: refs/heads/master@{#32477}

This becomes visible if an exception is thrown by the constructor.
We do this on "new Array(3.5)", throwing a RangeError.

BUG=

Review URL: https://codereview.chromium.org/1483053004

Cr-Commit-Position: refs/heads/master@{#32476}

Object.prototype.hasOwnProperty should use JSReceiver::HasOwnProperty for
proxies.

BUG=v8:1543
LOG=N

Review URL: https://codereview.chromium.org/1480213004

Cr-Commit-Position: refs/heads/master@{#32475}

Adds implementation and tests for LdaContextSlot, StaeContextSlot, PushContext,
and PopContext to bytecode graph builder

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1489863002

Cr-Commit-Position: refs/heads/master@{#32474}

proxies.

BUG=v8:1543
LOG=N

Review URL: https://codereview.chromium.org/1484313003

Cr-Commit-Position: refs/heads/master@{#32473}

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1492433003

Cr-Commit-Position: refs/heads/master@{#32472}

LOG=N
BUG=v8:1543

Review URL: https://codereview.chromium.org/1481383003

Cr-Commit-Position: refs/heads/master@{#32471}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1479233002

Cr-Commit-Position: refs/heads/master@{#32470}

Native scripts must not accidentally pollute the global object.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1490783002

Cr-Commit-Position: refs/heads/master@{#32469}

This moves the bailout for functions containing new.target variable to
the correct place so that Crankshaft doesn't accidentally inline such
functions, yielding an "undefined" new.target value all the time.

R=bmeurer@chromium.org
TEST=mjsunit/es6/regress/regress-inlined-new-target

Review URL: https://codereview.chromium.org/1484163003

Cr-Commit-Position: refs/heads/master@{#32468}

Remove two unused fields.
Define register codes the same way register names are defined and eliminate static methods.
#error if target isn't defined.

LOG=N
BUG=v8:4124

Review URL: https://codereview.chromium.org/1482963003

Cr-Commit-Position: refs/heads/master@{#32467}

BUG=v8:1543
LOG=N

Review URL: https://codereview.chromium.org/1482283002

Cr-Commit-Position: refs/heads/master@{#32466}

TEST=
BUG=

Review URL: https://codereview.chromium.org/1483973002

Cr-Commit-Position: refs/heads/master@{#32465}

Revert of [CQ] Update proto format to fix triggered builders. (patchset #1 id:1 of https://codereview.chromium.org/1486963002/ )

Reason for revert:
Maybe causing problems

Original issue's description:
> [CQ] Update proto format to fix triggered builders.
>
> Depends on https://chromereviews.googleplex.com/319777013/
>
> BUG=chromium:561530
> LOG=n
> TBR=sergiyb@chromium.org, tandrii@chromium.org
> NOTRY=true
>
> Committed: https://crrev.com/51d6d619330080a76c5bc7a2ebdafebc6a808aa8
> Cr-Commit-Position: refs/heads/master@{#32453}

TBR=sergiyb@chromium.org,tandrii@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:561530

Review URL: https://codereview.chromium.org/1485813004

Cr-Commit-Position: refs/heads/master@{#32464}

Revert of [heap] Remove eager shortcut in JSFunction visitor. (patchset #1 id:1 of https://codereview.chromium.org/1476223002/ )

Reason for revert:
Still investigating bad canary.

Original issue's description:
> [heap] Remove eager shortcut in JSFunction visitor.
>
> This removes an optimization in the static JSFunction visitor that
> eagerly marked through to the SharedFunctionInfo for code flushing
> candidates. This causes all processing in VisitJSFunction to be
> side-stepped and hence might cause leaks.
>
> R=hpayer@chromium.org
>
> Committed: https://crrev.com/a29f0576c32e8fda90bf7ab19c6d170568150a7f
> Cr-Commit-Position: refs/heads/master@{#32332}

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

Review URL: https://codereview.chromium.org/1488063002

Cr-Commit-Position: refs/heads/master@{#32463}

Revert of [heap] Refactor evacuation for young and old gen into visitors. (patchset #5 id:80001 of https://codereview.chromium.org/1470253002/ )

Reason for revert:
Still investigating bad canary.

Original issue's description:
> [heap] Refactor evacuation for young and old gen into visitors.
>
> Create a visitor for evacuating objects for young and old generation. This is
> the first step of preparing a task to process, both,  newspace and oldspace
> pages in parallel.
>
> BUG=chromium:524425
> LOG=N
>
> Committed: https://crrev.com/138d9bae5d7014e0d205634a49b5eac3697744c8
> Cr-Commit-Position: refs/heads/master@{#32349}

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

Review URL: https://codereview.chromium.org/1483393002

Cr-Commit-Position: refs/heads/master@{#32462}

Revert of [heap] Cleanup mark bit usage. (patchset #1 id:1 of https://codereview.chromium.org/1474203003/ )

Reason for revert:
Still investigating bad canary.

Original issue's description:
> [heap] Cleanup mark bit usage.
>
> BUG=
>
> Committed: https://crrev.com/5874ac783ff9bc4bb4b2fda81f5077f06619f96c
> Cr-Commit-Position: refs/heads/master@{#32362}

TBR=mlippautz@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1490753003

Cr-Commit-Position: refs/heads/master@{#32461}

Revert of [heap] Unify evacuating an object for new and old generation. (patchset #2 id:20001 of https://codereview.chromium.org/1481873002/ )

Reason for revert:
Still investigating bad canary.

Original issue's description:
> [heap] Unify evacuating an object for new and old generation.
>
> BUG=chromium:524425
> LOG=N
>
> Committed: https://crrev.com/afb8bcce8ba889280ed747eb218d287ddd233b4a
> Cr-Commit-Position: refs/heads/master@{#32365}

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

Review URL: https://codereview.chromium.org/1483963004

Cr-Commit-Position: refs/heads/master@{#32460}