This CL also disables inlining of calls at tail position.

This is a preparational step. Tail call elimination itself is neither enabled nor supported yet.

BUG=v8:4698
LOG=N

Review URL: https://codereview.chromium.org/1761023003

Cr-Commit-Position: refs/heads/master@{#34484}

According to https://www.w3.org/TR/html5/obsolete.html#dom-document-all
the undetectable bit (for document.all) only affects comparisons with
undefined and null. In particular comparisons with other values are not
affected, so we can actually simplify the handling of undetectable a
lot by only checking it when null or undefined might be involved (this
is actually in line with what the CompareIC does).

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/1764613004

Cr-Commit-Position: refs/heads/master@{#34483}

Revert of [wasm] Update {i32,i64}.const to use signed leb128 (patchset #3 id:40001 of https://codereview.chromium.org/1765673002/ )

Reason for revert:
[Sheriff] Breaks chromium win compile:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Win/builds/3844/steps/compile/logs/stdio

Original issue's description:
> [wasm] Update {i32,i64}.const to use signed leb128
>
> R=titzer@chromium.org
> R=bradnelson@chromium.org
> LOG=n
>
> Committed: https://crrev.com/4b613a67e0aa4e073946f5f0dd95ee9366c8ca86
> Cr-Commit-Position: refs/heads/master@{#34471}

TBR=bradnelson@chromium.org,titzer@chromium.org,binji@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1760363003

Cr-Commit-Position: refs/heads/master@{#34482}

Cr-Commit-Position: refs/heads/master@{#34481}

Revert of Introduce v8::MicrotasksScope. (patchset #6 id:100001 of https://codereview.chromium.org/1741893003/ )

Reason for revert:
[Sheriff] Speculative. Seems to break a bunch of webkit tests and causes timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/5103

Please rebase upstream if intended.

Original issue's description:
> Introduce v8::MicrotasksScope.
>
> This scope is used to control microtasks execution when MicrotasksPolicy::kScoped is engaged.
>
> BUG=chromium:585949
> LOG=Y
> TEST=ScopedMicrotasks
>
> Committed: https://crrev.com/db77cec242dbdf8ee26da8232fa930270429f253
> Cr-Commit-Position: refs/heads/master@{#34472}

TBR=jochen@chromium.org,adamk@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:585949

Review URL: https://codereview.chromium.org/1762943002

Cr-Commit-Position: refs/heads/master@{#34480}

  port 2689548e (r34459)

  original commit message:
  These new stubs perform exactly the same job as the string equality case
  for the CompareIC, but are platform independent and usable outside of
  fullcodegen and Crankshaft. We use them in the StrictEqualStub and the
  StrictNotEqualStub instead of falling back to the runtime immediately
  for String comparisons, and we also use them in TurboFan to perform
  String equality or inequality comparisons.

  These stubs currently handle only internalized and one byte strings w/o
  going to C++, but it should be easy to add support for more string cases
  later, i.e. utilizing already flattened cons strings or comparing two
  byte strings as well.

BUG=

Review URL: https://codereview.chromium.org/1760343002

Cr-Commit-Position: refs/heads/master@{#34479}

  port 18b9c1ce (r34461)

  original commit message:
  Per ProxyCreate() (https://tc39.github.io/ecma262/#sec-proxycreate), a Proxy
  is only given a [[Call]] slot if the target has a [[Call]] slot as well. This
  was previously implemented correctly for [[Construct]], but not for [[Call]].

BUG=

Review URL: https://codereview.chromium.org/1754593007

Cr-Commit-Position: refs/heads/master@{#34478}

BUG=
TBR=titzer@chromium.org
LOG=N
NOTRY=true

Review URL: https://codereview.chromium.org/1761273002

Cr-Commit-Position: refs/heads/master@{#34477}

Frames entering of inside wasm don't have a function or context argument.
Adding distinct wasm frame and function types to express this.

Fixes a GC issue on several embenchen wasm tests, reenabling them.

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

Review URL: https://codereview.chromium.org/1764603003

Cr-Commit-Position: refs/heads/master@{#34476}

Rolling v8/tools/clang to 3183208ae119c48012bed71645cb2ca537120811

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

Review URL: https://codereview.chromium.org/1768453002

Cr-Commit-Position: refs/heads/master@{#34475}

BUG=v8:3699, chromium:588803
LOG=y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1749353004

Cr-Commit-Position: refs/heads/master@{#34474}

Do not emit 2 operations for int64 add with overflow.

BUG=

Review URL: https://codereview.chromium.org/1764013002

Cr-Commit-Position: refs/heads/master@{#34473}

This scope is used to control microtasks execution when MicrotasksPolicy::kScoped is engaged.

BUG=chromium:585949
LOG=Y
TEST=ScopedMicrotasks

Review URL: https://codereview.chromium.org/1741893003

Cr-Commit-Position: refs/heads/master@{#34472}

R=titzer@chromium.org
R=bradnelson@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1765673002

Cr-Commit-Position: refs/heads/master@{#34471}

ES2015 generally bans FunctionDeclarations in positions which expect a Statement,
as opposed to a StatementListItem, such as a FunctionDeclaration which constitutes
the body of a for loop. However, Annex B 3.2 and 3.4 make exceptions for labeled
function declarations and function declarations as the body of an if statement in
sloppy mode, in the latter case specifying that the semantics are as if the
function declaration occurred in a block. Chrome has historically permitted
further extensions, for the body of any flow control construct.

This patch addresses both the syntactic and semantic mismatches between V8 and
the spec. For the semantic mismatch, function declarations as the body of if
statements change from unconditionally hoisting in certain cases to acquiring
the sloppy mode function in block semantics (based on Annex B 3.3). For the
extra syntax permitted, this patch adds a flag,
--harmony-restrictive-declarations, which excludes disallowed function declaration
cases. A new UseCounter, LegacyFunctionDeclaration, is added to count how often
function declarations occur as the body of other constructs in sloppy mode. With
this patch, the code generally follows the form of the specification with respect
to parsing FunctionDeclarations, rather than allowing them in arbitrary Statement
positions, and makes it more clear where our extensions occur.

BUG=v8:4647
R=adamk
LOG=Y

Review URL: https://codereview.chromium.org/1757543003

Cr-Commit-Position: refs/heads/master@{#34470}

CallSite depends on using the function name to get ahold of the property
name from which an exception was thrown. This fix properly handles the
ES2015 names for getters and setters. The new tests pass both with
--harmony-function-name off and on.

BUG=v8:3699
LOG=n

Review URL: https://codereview.chromium.org/1751403004

Cr-Commit-Position: refs/heads/master@{#34469}

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

Review URL: https://codereview.chromium.org/1758373002

Cr-Commit-Position: refs/heads/master@{#34468}

This CL fixes the bugs caused by the following CL:
50a394df -- MIPS64: Fix 'MIPS: use DAHI/DATH for li macro on mips64r6.'
  Port 1f5b84e4
  MIPS: use DAHI/DATH for li macro on mips64r6.

LUI instruction would sign extend into higher 32bits, in that case we might need to use DAHI, DATI to overwrite the extension.

The bug will occur when we are loading some addresses such as 0x00007fffffffxxxx.

BUG=
TEST=test-run-native-calls/Run_Int32_Select_*, test-run-native-calls/Run_Int32_WeightedSum_*, test-run-native-calls/Run_Int32_WeightedSum_*, test-run-native-calls/Run_Int32_Select_*

Review URL: https://codereview.chromium.org/1763733002

Cr-Commit-Position: refs/heads/master@{#34467}

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/1758893002

Cr-Commit-Position: refs/heads/master@{#34466}

Port 18b9c1ce

Original commit message:
    Per ProxyCreate() (https://tc39.github.io/ecma262/#sec-proxycreate), a Proxy
    is only given a [[Call]] slot if the target has a [[Call]] slot as well. This
    was previously implemented correctly for [[Construct]], but not for [[Call]].

R=caitpotter88@gmail.com, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4797, v8:4796, v8:1543
LOG=N

Review URL: https://codereview.chromium.org/1758283002

Cr-Commit-Position: refs/heads/master@{#34465}

Sets the code up so it'll be easier to have section names as strings instead of
hard-coded numbers. Using strings will require synchronizing with sexpr-wasm.

Mostly NFC (besides now skipping *all* unknown sections).

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1743773002

Cr-Commit-Position: refs/heads/master@{#34464}

This adds new code stubs for abstract relational comparison,
namely LessThanStub, LessThanOrEqualStub, GreaterThanStub and
GreaterThanOrEqualStub, and hooks them up for Ignition and TurboFan.
These stubs implement the full compare operation without any
unpredictable bailouts. Currently they still go to C++ for string
comparisons, and also use the %ToPrimitive_Number runtime entry, as
we still lack a stub for the ToPrimitive operation. These issues
will be addressed separately in follow-up CLs.

Drive-by-fix: Add support for deferred code in the RawMachineAssembler
and CodeStubAssembler. A block can be marked as deferred by marking its
Label as deferred, which will then make the register allocator penalize
this block and prefer better register assignments for the other blocks.

R=epertoso@chromium.org

Review URL: https://codereview.chromium.org/1759133002

Cr-Commit-Position: refs/heads/master@{#34463}

Port 2689548e

Original commit message:
    These new stubs perform exactly the same job as the string equality case
    for the CompareIC, but are platform independent and usable outside of
    fullcodegen and Crankshaft. We use them in the StrictEqualStub and the
    StrictNotEqualStub instead of falling back to the runtime immediately
    for String comparisons, and we also use them in TurboFan to perform
    String equality or inequality comparisons.

    These stubs currently handle only internalized and one byte strings w/o
    going to C++, but it should be easy to add support for more string cases
    later, i.e. utilizing already flattened cons strings or comparing two
    byte strings as well.

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

Review URL: https://codereview.chromium.org/1763723002

Cr-Commit-Position: refs/heads/master@{#34462}

Per ProxyCreate() (https://tc39.github.io/ecma262/#sec-proxycreate), a Proxy
is only given a [[Call]] slot if the target has a [[Call]] slot as well. This
was previously implemented correctly for [[Construct]], but not for [[Call]].

BUG=v8:4797, v8:4796, v8:1543
LOG=N
R=cbruni@chromium.org, neis@chromium.org, adamk@chromium.org, littledan@chromium.org

Review URL: https://codereview.chromium.org/1752133004

Cr-Commit-Position: refs/heads/master@{#34461}

Changes MacroAssembler::GenerateSwitchTable to make sure that 'ra' is properly restored.

BUG=

Review URL: https://codereview.chromium.org/1761863002

Cr-Commit-Position: refs/heads/master@{#34460}

These new stubs perform exactly the same job as the string equality case
for the CompareIC, but are platform independent and usable outside of
fullcodegen and Crankshaft. We use them in the StrictEqualStub and the
StrictNotEqualStub instead of falling back to the runtime immediately
for String comparisons, and we also use them in TurboFan to perform
String equality or inequality comparisons.

These stubs currently handle only internalized and one byte strings w/o
going to C++, but it should be easy to add support for more string cases
later, i.e. utilizing already flattened cons strings or comparing two
byte strings as well.

Review URL: https://codereview.chromium.org/1761823002

Cr-Commit-Position: refs/heads/master@{#34459}

This is more consistent with the current naming scheme (i.e. IsCallable
for callable bit on map, IsConstructor for constructor bit on map, and
now IsUndetectable for undetectable bit on map).

Also simplify the fallthrough case for Object::Equals, because we don't
need to check for Null or Undefined or Undetectable, as both Null and
Undefined already have the undetectable bit set on their maps.

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1756413003

Cr-Commit-Position: refs/heads/master@{#34458}

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}