This reverts commit 2608ecc7.

Revert "Specialize helper methods in the LookupIterator by is_element."

This reverts commit 6eb483f8.

Revert "Avoid SetPropertyInternal if the LookupIterator is NotFound"

This reverts commit ca5bd8d4.

Revert "Inline fast-bailout-checks for LookupIterator::UpdateProtector"

This reverts commit d98570a1.

This breaks layout tests with timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/5060

It also seems to break jsfunfuzz:
https://build.chromium.org/p/client.v8/builders/V8%20Fuzzer/builds/7930

The other three CLs are reverted to be able to revert the first.

BUG=v8:4798
LOG=n
TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/1761593003

Cr-Commit-Position: refs/heads/master@{#34457}

The support was already removed from the Crankshaft and this CL removes the last piece.

Review URL: https://codereview.chromium.org/1764593002

Cr-Commit-Position: refs/heads/master@{#34456}

BUG=

Review URL: https://codereview.chromium.org/1755013003

Cr-Commit-Position: refs/heads/master@{#34455}

  port 4acb492e (r34423)

  original commit message:
  Initial version of a new StrictEqualStub written as TurboFan code stub,
  that implements the full strict equality comparison and is usable for
  both TurboFan and Ignition (and soon for the generic CompareIC case
  too). The stub is not fully optimized yet, i.e. we still go to the
  runtime for string comparisons, but that'll be addressed in a follow-up
  CL.

BUG=

Review URL: https://codereview.chromium.org/1762533002

Cr-Commit-Position: refs/heads/master@{#34454}

  port c129aa4d (r34239)

  original commit message:
  These macro operators represent a conditional eager deoptimization exit
  without explicit branching, which greatly reduces overhead of both
  scheduling and register allocation, and thereby greatly reduces overall
  compilation time, esp. when there are a lot of eager deoptimization
  exits.

BUG=

Review URL: https://codereview.chromium.org/1762483003

Cr-Commit-Position: refs/heads/master@{#34453}

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org,yangguo@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1729833002

Cr-Commit-Position: refs/heads/master@{#34452}

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=wasm-fuzzer
R=titzer@chromium.org,kcc@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1760033002

Cr-Commit-Position: refs/heads/master@{#34451}

BUG=

Review URL: https://codereview.chromium.org/1597163002

Cr-Commit-Position: refs/heads/master@{#34450}

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=titzer@chromium.org,aseemgarg@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1756693003

Cr-Commit-Position: refs/heads/master@{#34449}

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

Review URL: https://codereview.chromium.org/1756303002

Cr-Commit-Position: refs/heads/master@{#34448}

Newly added tests cause failures on 32-bit bigendian and are skipped
until a solution is found.

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

Review URL: https://codereview.chromium.org/1761573002

Cr-Commit-Position: refs/heads/master@{#34447}

BUG=v8:4766
LOG=N

Review URL: https://codereview.chromium.org/1751963003

Cr-Commit-Position: refs/heads/master@{#34446}

We cannot optimize away ToNumber conversions based on the Type that we
see in Crankshaft, as this might be the (unchecked or even pretruncated)
lower bound. We can only use the HType, which is based on the definition.

R=jkummerow@chromium.org
BUG=chromium:590989
LOG=n

Review URL: https://codereview.chromium.org/1757013002

Cr-Commit-Position: refs/heads/master@{#34445}

Port 4acb492e

Original commit message:
    Initial version of a new StrictEqualStub written as TurboFan code stub,
    that implements the full strict equality comparison and is usable for
    both TurboFan and Ignition (and soon for the generic CompareIC case
    too). The stub is not fully optimized yet, i.e. we still go to the
    runtime for string comparisons, but that'll be addressed in a follow-up
    CL.

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

Review URL: https://codereview.chromium.org/1756243002

Cr-Commit-Position: refs/heads/master@{#34444}

The ES2016 draft spec defines a sort of fast path for constructing
a TypedArray based on another TypedArray. This patch implements that
alternative path in TypedArray construction. It is verified by
test262 tests, which now pass. This patch also has a slight cleanup
of TypedArray code by using a macro for TypedArray type checks, as
is done for other types.

This patch includes a minor spec violation: In the same-type case, the
spec indicates that the underlying ArrayBuffer should be copied until
the end, and this is fixed up by making the [[ArrayLength]] shorter.
This is observable with the buffer getter. This patch just copies the
used part of the underlying ArrayBuffer.

R=adamk
BUG=v8:4726
LOG=Y

Review URL: https://codereview.chromium.org/1754593003

Cr-Commit-Position: refs/heads/master@{#34443}

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1760613002

Cr-Commit-Position: refs/heads/master@{#34442}

The CompilationPhase helper class is only used in Crankshaft and is not
suitable for use in other compilers. This factors is out into a separate
file and moves it into the "crankshaft" directory.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1758773002

Cr-Commit-Position: refs/heads/master@{#34441}

There is no reason to keep around the HOptimizedGraphBuilder after the
graph has successfully been built. Later phases in OptimizedCompileJob
should not rely on it anymore.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1756183002

Cr-Commit-Position: refs/heads/master@{#34440}

Avoid pushing null arguments.

BUG=
TEST=cctest/test-run-machops/RunCallCFunction8

Review URL: https://codereview.chromium.org/1758813002

Cr-Commit-Position: refs/heads/master@{#34439}

BUG=

Review URL: https://codereview.chromium.org/1754023003

Cr-Commit-Position: refs/heads/master@{#34438}

BUG=

Review URL: https://codereview.chromium.org/1756883002

Cr-Commit-Position: refs/heads/master@{#34437}

BUG=

Review URL: https://codereview.chromium.org/1752383002

Cr-Commit-Position: refs/heads/master@{#34436}

Fix additional cases where the AIX compiler reports that a variable
may be used uninitialized.

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

Review URL: https://codereview.chromium.org/1755673002

Cr-Commit-Position: refs/heads/master@{#34435}

R=mythria@chromium.org, rmcilroy@chromium.org
BUG=v8:4689
LOG=N

Review URL: https://codereview.chromium.org/1759673002

Cr-Commit-Position: refs/heads/master@{#34434}

BUG=

Review URL: https://codereview.chromium.org/1758733002

Cr-Commit-Position: refs/heads/master@{#34433}

Otherwise e.g.,
"use strict";
class C { static f() { super.location = "http://bla.com" }}
C.f.call(this);

will mask location on the hidden prototype of the JSGlobalObject.

BUG=

Review URL: https://codereview.chromium.org/1757933002

Cr-Commit-Position: refs/heads/master@{#34432}

It used to say "Unexpected token ILLEGAL", now it says "Invalid or unexpected token".

R=jkummerow@chromium.org
BUG=chromium:257405
LOG=N

Review URL: https://codereview.chromium.org/1758663002

Cr-Commit-Position: refs/heads/master@{#34431}

This speeds up lookup.

BUG=

Review URL: https://codereview.chromium.org/1753273002

Cr-Commit-Position: refs/heads/master@{#34430}

This introduces a new instance type and reorders the JSObject types so any type requiring special LookupIterator support can be identified with a single range check.

In addition, it restructures the Next for better performance, avoiding unnecessary calls.

BUG=

Review URL: https://codereview.chromium.org/1751043002

Cr-Commit-Position: refs/heads/master@{#34429}

BUG=

Review URL: https://codereview.chromium.org/1753803003

Cr-Commit-Position: refs/heads/master@{#34428}

This relaxes the constraints of the optimized code map in order to be
able to update existing entries. It also simplifies the interface a
little bit. We can now insert an entry for a newly allocated literals
array together with previously cached context-independent code.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1753213002

Cr-Commit-Position: refs/heads/master@{#34427}

Generalize the code that we have for StrictEqualStub to also general a
StrictNotEqualStub and hook that up with TurboFan and Ignition. It's
still falling back to the runtime for every String (in)equality check.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1756793002

Cr-Commit-Position: refs/heads/master@{#34426}

In order to track certain critical code-patters we will start adding
micro-benchmarks that reflect common requests on http://jsperf.com.
In this first CL a number of property enumeration methods are added,
in the hope to get a clearer picture on future regressions.

BUG=

Review URL: https://codereview.chromium.org/1702613002

Cr-Commit-Position: refs/heads/master@{#34425}

The macro is currently used by AllocateHeapNumberStub and AllocateMutableHeapNumberStub, which are now turbofan code stubs.
It can be used to allocate objects in the new or old space, optionally with double alignment.

BUG=588692
LOG=y

Review URL: https://codereview.chromium.org/1735803003

Cr-Commit-Position: refs/heads/master@{#34424}

Initial version of a new StrictEqualStub written as TurboFan code stub,
that implements the full strict equality comparison and is usable for
both TurboFan and Ignition (and soon for the generic CompareIC case
too). The stub is not fully optimized yet, i.e. we still go to the
runtime for string comparisons, but that'll be addressed in a follow-up
CL.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1753173003

Cr-Commit-Position: refs/heads/master@{#34423}

The function literal consists of a list of statements. Each statement
is associated with a statement position including break location. The
only exception to this rule is when the function immediately throws if
scope resolution found an illegal redeclaration. Make sure that we add a
break location for this case as well. The debugger relies on this.

R=bmeurer@chromium.org, vogelheim@chromium.org
BUG=v8:4690
LOG=N

Review URL: https://codereview.chromium.org/1759603002

Cr-Commit-Position: refs/heads/master@{#34422}

R=danno@chromium.org,rschoen@chromium.org,seththompson@chromium.org
BUG=
NOTRY=true

Review URL: https://codereview.chromium.org/1754723002

Cr-Commit-Position: refs/heads/master@{#34421}

  port dbf5fffd (r34397)

  original commit message:
  In ia32 PushArgsAndConstruct builtin, we run out of registers and need to
  temporarily store the data in the stack. In the earlier implementation,
  a location outside the esp was used. This causes a problem if there is a
  interrupt/signals which would use the same stack and corrupt the data that
  is above the esp. This cl fixes it by pushing it onto the stack so that
  the stack pointer is updated and hence the corruption will not happen. We
  reuse the slot meant for receiver as a temporary store.

BUG=

Review URL: https://codereview.chromium.org/1756743002

Cr-Commit-Position: refs/heads/master@{#34420}

Revert of [api] Don't go to javascript to construct API functions (patchset #3 id:40001 of https://codereview.chromium.org/1756433002/ )

Reason for revert:
[Sheriff] Breaks webkit unittests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/5043

Original issue's description:
> [api] Don't go to javascript to construct API functions
>
> BUG=
> R=bmeurer@chromium.org,verwaest@chromium.org
>
> Committed: https://crrev.com/21a5bfbd2ced6e4a3545bbde712630c0d8734c0b
> Cr-Commit-Position: refs/heads/master@{#34411}

TBR=bmeurer@chromium.org,verwaest@chromium.org,jochen@chromium.org
# 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/1758623002

Cr-Commit-Position: refs/heads/master@{#34419}

Rolling v8/tools/clang to a8288b3f25cdc4e3c3f4dd7ea2f7765ae8847459

Rolling v8/tools/swarming_client to df6e95e7669883c8fe9ef956c69a544154701a49

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

Review URL: https://codereview.chromium.org/1753133002

Cr-Commit-Position: refs/heads/master@{#34418}