Restore frame pointer directly from stack rather than copying it and
restoring. Also restore return address register directly on platforms that
support it.

BUG=v8:4076
LOG=n

Review URL: https://codereview.chromium.org/1488553002

Cr-Commit-Position: refs/heads/master@{#32410}

R=machenbach@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1480323002

Cr-Commit-Position: refs/heads/master@{#32409}

an optomization to remove redundant cast operations.

1. Adds an optimization to remove redundant ToBoolean and ToName operations.
2. Adds implementation and tests for cast operatorts to bytecode graph builder.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1468003002

Cr-Commit-Position: refs/heads/master@{#32408}

This way we avoid the %_IsSmi magic that is required in TurboFan to
(efficiently) check abitrary context slots for smi 0. Checking against
"the hole" is common in the AstGraphBuilder and "the hole" is also used
to mark other context slots as not initialized.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/1484723003

Cr-Commit-Position: refs/heads/master@{#32407}

Revert of Do not remove write barriers for stores of old space references in most recent old space allocation. (patchset #1 id:1 of https://codereview.chromium.org/1478113002/ )

Reason for revert:
Broken canary. Trying to find out root cause.

Original issue's description:
> Do not remove write barriers for stores of old space references in most recent old space allocation.
>
> BUG=chromium:561449
> LOG=n
>
> Committed: https://crrev.com/369778ec55a63ebe51e8fa8497edb5b681069b9b
> Cr-Commit-Position: refs/heads/master@{#32368}

TBR=ulan@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:561449

Review URL: https://codereview.chromium.org/1482973003

Cr-Commit-Position: refs/heads/master@{#32406}

Revert of Tenure transition array. (patchset #1 id:1 of https://codereview.chromium.org/1472363007/ )

Reason for revert:
Broken canary. Trying to find out root cause.

Original issue's description:
> Tenure transition array.
>
> BUG=
>
> Committed: https://crrev.com/c88d7cd1e09d921e8a9a2930cfe6f2dfbea3dc90
> Cr-Commit-Position: refs/heads/master@{#32378}

TBR=ulan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:563378

Review URL: https://codereview.chromium.org/1485613003

Cr-Commit-Position: refs/heads/master@{#32405}

Revert of Introduce instance type for transition arrays. (patchset #6 id:100001 of https://codereview.chromium.org/1480873003/ )

Reason for revert:
Broken canary. Trying to find out root cause.

Original issue's description:
> Introduce instance type for transition arrays.
>
> The motivation is to allow specialized marking visitor for transition arrays and collect all transition array in a list for post-processing in ClearNonLiveReferences.
>
> BUG=chromium:554488
> LOG=NO
>
> Committed: https://crrev.com/026095a3c7932573e1810b8064ec3008ed696601
> Cr-Commit-Position: refs/heads/master@{#32396}

TBR=mlippautz@chromium.org,jkummerow@chromium.org,ulan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:554488

Review URL: https://codereview.chromium.org/1483003002

Cr-Commit-Position: refs/heads/master@{#32404}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1483933002

Cr-Commit-Position: refs/heads/master@{#32403}

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1488493002

Cr-Commit-Position: refs/heads/master@{#32402}

This depends on issue 1476403004.

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1479293002

Cr-Commit-Position: refs/heads/master@{#32401}

R=bmeurer@chromium.org, mstarzinger@chromium.org
BUG=chromium:508898
LOG=Y

Review URL: https://codereview.chromium.org/1477413002

Cr-Commit-Position: refs/heads/master@{#32400}

Adds support and tests for throw to bytecode graph builder.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1481763002

Cr-Commit-Position: refs/heads/master@{#32399}

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1476403004

Cr-Commit-Position: refs/heads/master@{#32398}

This switches several builtin methods to use the ES6 new.target value
when determined whether being called as a constructor or not. This is
prepatory work for fully deprecating the aforementioned intrinsic.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/1477073005

Cr-Commit-Position: refs/heads/master@{#32397}

The motivation is to allow specialized marking visitor for transition arrays and collect all transition array in a list for post-processing in ClearNonLiveReferences.

BUG=chromium:554488
LOG=NO

Review URL: https://codereview.chromium.org/1480873003

Cr-Commit-Position: refs/heads/master@{#32396}

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1480273002

Cr-Commit-Position: refs/heads/master@{#32395}

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1486553002

Cr-Commit-Position: refs/heads/master@{#32394}

Use {FIRST,LAST}_JS_RECEIVER_TYPE instead.

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1486563002

Cr-Commit-Position: refs/heads/master@{#32393}

Monotonicity is not required at the current setup, where we do backward pass through
the graph.  However, for bidirectinal analysis, we'd better be sure that all the
input/use information is monotone.

The checker here is quite strict - it requires monotonicity in each of: use
representations, use truncation, output representation and output type. In future, we can
lower the requirements and use lexicographic ordering (e.g., on use truncation and
representation).

Review URL: https://codereview.chromium.org/1473733007

Cr-Commit-Position: refs/heads/master@{#32392}

BUG=v8:1543
LOG=n

Review URL: https://codereview.chromium.org/1479143002

Cr-Commit-Position: refs/heads/master@{#32391}

Add initial support to optimize certain "prototype" loads from known
JSFunctions which have a prototype. This includes an appropriate typing
rule plus a matching rule for typed lowering.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1482213002

Cr-Commit-Position: refs/heads/master@{#32390}

R=vogelheim@chromium.org
LOG=n
BUG=v8:2487

Review URL: https://codereview.chromium.org/1474353002

Cr-Commit-Position: refs/heads/master@{#32389}

  port 7ceaf727 (r32370)

  original commit message:

BUG=

Review URL: https://codereview.chromium.org/1483873002

Cr-Commit-Position: refs/heads/master@{#32388}

  port 47502a23 (r32381)

  original commit message:
  Previously all contexts had a link to the global object, but what is
  required in most cases (except for the global load, store and delete
  case) is the native context.

  This also removes the second dummy global object that was still linked
  to every native context. We will add a different mechanism to ensure
  that builtins do not pollute the actual global object during
  bootstrapping.

  Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.

BUG=

Review URL: https://codereview.chromium.org/1481353002

Cr-Commit-Position: refs/heads/master@{#32387}

Both are integrated into JSReceiver::GetKeys().

For now, the implementation ignores Symbol/DONT_ENUM filtering.

BUG=v8:1543
LOG=n

Committed: https://crrev.com/42c6056e6f247724d14dc887f6619a6bf5867a97
Cr-Commit-Position: refs/heads/master@{#32384}

Review URL: https://codereview.chromium.org/1474083003

Cr-Commit-Position: refs/heads/master@{#32386}

Revert of [proxies] Implement [[Enumerate]] and [[OwnPropertyKeys]] (patchset #3 id:40001 of https://codereview.chromium.org/1474083003/ )

Reason for revert:
[Sheriff] Speculative revert for gc mole:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gcmole/builds/5164

Original issue's description:
> [proxies] Implement [[Enumerate]] and [[OwnPropertyKeys]]
>
> Both are integrated into JSReceiver::GetKeys().
>
> For now, the implementation ignores Symbol/DONT_ENUM filtering.
>
> BUG=v8:1543
> LOG=n
>
> Committed: https://crrev.com/42c6056e6f247724d14dc887f6619a6bf5867a97
> Cr-Commit-Position: refs/heads/master@{#32384}

TBR=verwaest@chromium.org,bmeurer@chromium.org,jkummerow@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:1543

Review URL: https://codereview.chromium.org/1482113002

Cr-Commit-Position: refs/heads/master@{#32385}

Both are integrated into JSReceiver::GetKeys().

For now, the implementation ignores Symbol/DONT_ENUM filtering.

BUG=v8:1543
LOG=n

Review URL: https://codereview.chromium.org/1474083003

Cr-Commit-Position: refs/heads/master@{#32384}

Port 68cc0be2

Original commit message:
The TruncateFloat32ToUint64 operator converts a float32 to an uint64 using
round-to-zero rounding mode. If the input value is outside uint64 range, then
the result depends on the architecture. I provide an implementation for x64 and
arm64.

BUG=

Review URL: https://codereview.chromium.org/1481093003

Cr-Commit-Position: refs/heads/master@{#32383}

This makes sure that proxy + Function/Array works
Makes sure that new.target can be a generator
Makes sure that if new.target is not a subclass, but does not have a prototype, that we'll get that same prototype back the next time we look at new.target.prototype.

BUG=v8:1543, v8:3330, v8:3931
LOG=n

Review URL: https://codereview.chromium.org/1484473002

Cr-Commit-Position: refs/heads/master@{#32382}

Previously all contexts had a link to the global object, but what is
required in most cases (except for the global load, store and delete
case) is the native context.

This also removes the second dummy global object that was still linked
to every native context. We will add a different mechanism to ensure
that builtins do not pollute the actual global object during
bootstrapping.

Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.

CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
R=yangguo@chromium.org,mstarzinger@chromium.org

Committed: https://crrev.com/d290f204938295bfecc5c8e645ccfcff6e80ddb8
Cr-Commit-Position: refs/heads/master@{#32375}

Review URL: https://codereview.chromium.org/1480003002

Cr-Commit-Position: refs/heads/master@{#32381}

And add a presubmit check to guard against future duplicates.

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1477403002

Cr-Commit-Position: refs/heads/master@{#32380}

The TruncateFloat32ToUint64 operator converts a float32 to an uint64 using
round-to-zero rounding mode. If the input value is outside uint64 range, then
the result depends on the architecture. I provide an implementation for x64 and
arm64.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1479713003

Cr-Commit-Position: refs/heads/master@{#32379}

BUG=

Review URL: https://codereview.chromium.org/1472363007

Cr-Commit-Position: refs/heads/master@{#32378}

Revert of [runtime] Replace global object link with native context link in all contexts. (patchset #3 id:40001 of https://codereview.chromium.org/1480003002/ )

Reason for revert:
[Sheriff] Breaks:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap/builds/5472

Original issue's description:
> [runtime] Replace global object link with native context link in all contexts.
>
> Previously all contexts had a link to the global object, but what is
> required in most cases (except for the global load, store and delete
> case) is the native context.
>
> This also removes the second dummy global object that was still linked
> to every native context. We will add a different mechanism to ensure
> that builtins do not pollute the actual global object during
> bootstrapping.
>
> Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
>
> R=yangguo@chromium.org
>
> Committed: https://crrev.com/d290f204938295bfecc5c8e645ccfcff6e80ddb8
> Cr-Commit-Position: refs/heads/master@{#32375}

TBR=yangguo@chromium.org,mstarzinger@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1478303002

Cr-Commit-Position: refs/heads/master@{#32377}

Requires passing an explicit Isolate* to a bunch of static Assembler
methods.

BUG=v8:2487
R=yangguo@chromium.org,jkummerow@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1474323002

Cr-Commit-Position: refs/heads/master@{#32376}

Previously all contexts had a link to the global object, but what is
required in most cases (except for the global load, store and delete
case) is the native context.

This also removes the second dummy global object that was still linked
to every native context. We will add a different mechanism to ensure
that builtins do not pollute the actual global object during
bootstrapping.

Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1480003002

Cr-Commit-Position: refs/heads/master@{#32375}

This replaces internal GetConstructorName with toStringTag, .constructor's name
and class_name. This entirely changes how the name is computed for use in
devtools.

BUG=chromium:529177
LOG=n

Review URL: https://codereview.chromium.org/1435273002

Cr-Commit-Position: refs/heads/master@{#32374}

This will allow moving the test outcome check beyond the
multi-process boundary in a follow up. It'll allow wrapping
more complex test jobs like predicable mode on the multi-
process side, which will make the code easier to maintain.

BUG=

Review URL: https://codereview.chromium.org/1469833002

Cr-Commit-Position: refs/heads/master@{#32373}

BUG=chromium:548562
LOG=n

Review URL: https://codereview.chromium.org/1474303002

Cr-Commit-Position: refs/heads/master@{#32372}

It needs ot to flush icaches all over the place

BUG=v8:2487
LOG=n
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1477343002

Cr-Commit-Position: refs/heads/master@{#32371}