port f68059b7 (r38383)

  original commit message:
  Benedikt, do you think we could also provide these operators on mips,
  maybe by expanding them to "-0.0 -x"? If mips can provide these operators,
  then we could make Float64Neg and Float32Neg real operators and not just
  OptionalOperators.

BUG=

Review-Url: https://codereview.chromium.org/2223793002
Cr-Commit-Position: refs/heads/master@{#38464}

The test has already been removed in
https://codereview.chromium.org/2226053002/.

NOTRY=true
R=machenbach@chromium.org, bradnelson@chromium.org

Review-Url: https://codereview.chromium.org/2229713002
Cr-Commit-Position: refs/heads/master@{#38463}

LOG=N
BUG=V8:4124

Review-Url: https://codereview.chromium.org/2214843003
Cr-Commit-Position: refs/heads/master@{#38462}

While we might at some point want to explore if this is a win versus
whole modules, for now we have the Tables interface planned.

R=titzer@chromium.org,ahaas@chromium.org,mtrofin@chromium.org,rossberg@chromium.org
BUG=v8:5044

Review-Url: https://codereview.chromium.org/2226053002
Cr-Commit-Position: refs/heads/master@{#38461}

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2226803003
Cr-Commit-Position: refs/heads/master@{#38460}

scope_inside_with_ itself is still used internally during analysis.

R=verwaest@chromium.org

Review-Url: https://codereview.chromium.org/2221783005
Cr-Commit-Position: refs/heads/master@{#38459}

This avoids direct access to scope() for later lazy scope allocation.

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2225773003
Cr-Commit-Position: refs/heads/master@{#38458}

%InitializeConstGlobal has been dead code since the demise of legacy const
declarations. While getting rid of that call, also cleaned up and clarified
the surrounding code in a variety of ways.

R=neis@chromium.org

Review-Url: https://codereview.chromium.org/2219223002
Cr-Commit-Position: refs/heads/master@{#38457}

To be able to lazily allocate BlockScopes, we need to reduce access to scope(). The explicit accesses removed here just need access to the current scope to allocate unresolved variable proxies. Those in the future should go over ScopeState rather than directly to Scope.

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2224843003
Cr-Commit-Position: refs/heads/master@{#38456}

V8 APIs for wasm serialization/deserialization.

BUG=v8:5072

Review-Url: https://codereview.chromium.org/2226753002
Cr-Commit-Position: refs/heads/master@{#38455}

This removes the "resolve" parameter from Declare, since there's no case
where Scope analysis wouldn't make the same resolution decision the
parser can make here.

Other cleanup includes:
  - Replace some if statements with DCHECKS where they could never be hit
  - After the above, reordered some conditions for clarity
  - Remove or edit down old comments

Should be no change in behavior.

R=neis@chromium.org

Review-Url: https://codereview.chromium.org/2217973003
Cr-Commit-Position: refs/heads/master@{#38454}

This parameter was never used and doesn't seem like it would ever be
useful, so it's gone now.

R=epertoso@chromium.org

Review-Url: https://codereview.chromium.org/2221043002
Cr-Commit-Position: refs/heads/master@{#38453}

R=machenbach@chromium.org

Committed: https://crrev.com/5eed70c6b474635ccdf111e2269dbf33e629ce0b
Review-Url: https://codereview.chromium.org/2225843002
Cr-Original-Commit-Position: refs/heads/master@{#38445}
Cr-Commit-Position: refs/heads/master@{#38452}

There's no need to do so.

Also simplify NeedsContext(), which doesn't need to check for with-scopes.

R=adamk@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2225683004
Cr-Commit-Position: refs/heads/master@{#38451}

Setting kMinimumCodeRangeSize as 3*pagesize. This will set the
constant correctly for PPC where pagesize is 4MB.

R=mlippautz@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2206583004
Cr-Commit-Position: refs/heads/master@{#38450}

BUG=

Review-Url: https://codereview.chromium.org/2225013002
Cr-Commit-Position: refs/heads/master@{#38449}

Review-Url: https://codereview.chromium.org/2222953003
Cr-Commit-Position: refs/heads/master@{#38448}

BUG=v8:4914
R=gdeepti@chromium.org

Review-Url: https://codereview.chromium.org/2226613002
Cr-Commit-Position: refs/heads/master@{#38447}

Revert of [test] Split TurboFan mjsunit expectations for variants. (patchset #5 id:80001 of https://codereview.chromium.org/2225843002/ )

Reason for revert:
Revert as asan bot blocks the clusterfuzz uploads:

https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20ASAN/builds/14256

https://build.chromium.org/p/client.v8/builders/V8%20Mac64%20ASAN

Please add more skips on reland.

Original issue's description:
> [test] Split TurboFan mjsunit expectations for variants.
>
> R=machenbach@chromium.org
>
> Committed: https://crrev.com/5eed70c6b474635ccdf111e2269dbf33e629ce0b
> Cr-Commit-Position: refs/heads/master@{#38445}

TBR=mstarzinger@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/2227733002
Cr-Commit-Position: refs/heads/master@{#38446}

R=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2225843002
Cr-Commit-Position: refs/heads/master@{#38445}

Port eb841269

Original commit message:

    One caveat: the Crankshaft stub used to preserve callee-clobbered double
    registers, which is contrary to any real platform ABI that we support. Since the
    only current use of this stub is in Crankshaft, the instruction there now must
    be marked as double-clobbering. This might result in a small performance
    regression. However, when this stub is eventually used in TF-generated code, it
    will be called from deferred code that can save doubles only on the rarely-taken
    path... something that Crankshaft can't do.

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=chromium:608675
LOG=N

Review-Url: https://codereview.chromium.org/2227673003
Cr-Commit-Position: refs/heads/master@{#38444}

1. Decouple kS390_Add/Sub/Neg to
     kS390_Add32/Sub32/Neg32/Add64/Sub64/Neg64
2. Nuke kS390_Add/SubWithOverflow32
3. Add Support for Load-On-Condition to optimize AssembleArchBoolean

R=joransiu@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com, bjaideep@ca.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2220313002
Cr-Commit-Position: refs/heads/master@{#38443}

R=danno
BUG=

Review-Url: https://codereview.chromium.org/2227643002
Cr-Commit-Position: refs/heads/master@{#38442}

R=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2222873003
Cr-Commit-Position: refs/heads/master@{#38441}

Review-Url: https://codereview.chromium.org/2224943002
Cr-Commit-Position: refs/heads/master@{#38440}

This removes the test-download method for all but
promises-aplus. They all only contain legacy code for
deleting old archives.

Only test262 needs to prepare sources on swarming, which is
moved to a new method, called unconditionally.

All references to --download-data and --download-data-only
in the infrastructure can be removed after this.

BUG=

Review-Url: https://codereview.chromium.org/2227613002
Cr-Commit-Position: refs/heads/master@{#38439}

This allows us to consume the type hints gathered by the CompareIC
for the strict equality and inequality operators. Similar to abstract
equality We need to distinguish Number and NumberOrOddball feedback,
as strict equality doesn't truncate Oddball to Number.

R=epertoso@chromium.org
BUG=v8:4583

Review-Url: https://codereview.chromium.org/2222993003
Cr-Commit-Position: refs/heads/master@{#38438}

This CL changes the semantics of FloatXXSub to match the semantics of
the semantics of FloatXXSubPreserveNan. Therefore there is no need
anymore for the FloatXXSubPreserveNan operators.

The optimizations in VisitFloatXXSub which are removed in this CL have
already been moved to machine-operator-reducer.cc in
https://codereview.chromium.org/2226663002

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2220973002
Cr-Commit-Position: refs/heads/master@{#38437}

BUG=v8:5209

Review-Url: https://codereview.chromium.org/2224793003
Cr-Commit-Position: refs/heads/master@{#38436}

BUG=chromium:634900

Review-Url: https://codereview.chromium.org/2223493002
Cr-Commit-Position: refs/heads/master@{#38435}

This saves memory when parsing.

BUG=

Review-Url: https://codereview.chromium.org/2220363002
Cr-Commit-Position: refs/heads/master@{#38434}

This CL applies the same optimization already present for calling API-function.
Execution::New and Execution::Call now both check whether the target is an
API-function and avoid calling out into the construct/call stub.

BUG=chromium:630217

Review-Url: https://codereview.chromium.org/2203353002
Cr-Commit-Position: refs/heads/master@{#38433}

This allows us to consume the type hints gathered by the CompareIC for
the abstract equality and inequality operators. We need to distinguish
Number and NumberOrOddball feedback now, as abstract equality doesn't
truncate null and undefined to Number.

R=epertoso@chromium.org
BUG=v8:4583

Review-Url: https://codereview.chromium.org/2222983002
Cr-Commit-Position: refs/heads/master@{#38432}

R=bmeurer@chromium.org
TEST=mjsunit/debug-referenced-by
BUG=v8:4754

Review-Url: https://codereview.chromium.org/2225803002
Cr-Commit-Position: refs/heads/master@{#38431}

R=adamk@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2210533002
Cr-Commit-Position: refs/heads/master@{#38430}

Review-Url: https://codereview.chromium.org/2188533002
Cr-Commit-Position: refs/heads/master@{#38429}

Before this change we would first load an 8/16/32-bit value from memory into a 32-bit register, then zero/sign-extend from that register to a 64-bit one. Now we replace that pattern with a single movsx/movzx.

Ported from http://crrev.com/2183923003

R=bmeurer@chromium.org

Committed: https://crrev.com/4abecb7a27bd5fa073d0ff5fadb0c2bb248ef9f4
Review-Url: https://codereview.chromium.org/2220483003
Cr-Original-Commit-Position: refs/heads/master@{#38388}
Cr-Commit-Position: refs/heads/master@{#38428}

R=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2216373002
Cr-Commit-Position: refs/heads/master@{#38427}

Introduces a new VariableLocation MODULE for variables that live in a
module's export table.  Scope analysis sets this for the approriate variables.
Not yet supported by any backend.

Also, treats all imports as CONST bindings (including namespace imports), rather
than having new special variable modes.

BUG=

Review-Url: https://codereview.chromium.org/2199283002
Cr-Commit-Position: refs/heads/master@{#38426}

Remove --ignition-turbofan after:
https://codereview.chromium.org/2222913002/

BUG=v8:5238
TBR=rmcilroy@chromium.org, mstarzinger@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2220383002
Cr-Commit-Position: refs/heads/master@{#38425}