This removed some inconsistent/duplicated code and made the testing
side entrance much simpler: Now it simply constructs a pipeline and
hands off to the "tail" of the normal pipeline.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/924823002

Cr-Commit-Position: refs/heads/master@{#26637}

Use a fake code stub instead, basically following the null object pattern.

Review URL: https://codereview.chromium.org/918973002

Cr-Commit-Position: refs/heads/master@{#26610}

R=danno@chromium.org
TEST=cctest/test-run-intrinsics/CallFunction

Review URL: https://codereview.chromium.org/916873002

Cr-Commit-Position: refs/heads/master@{#26604}

R=bmeurer@chromium.org
TEST=unittests/CommonOperatorTest

Review URL: https://codereview.chromium.org/912393002

Cr-Commit-Position: refs/heads/master@{#26584}

A CompilationInfo constructed from just an Isolate* and a Zone* is in
weird an inconsistent state (calling e.g. flags() on it will crash),
so we need to avoid them. This CL removes almost all of them, the
remaining 2 call sites in (for testing only) will be handled in a
separate CL. Things which have been changed:

  * Linkage is basically a decorator for CallDescriptor now.

  * ChangeLowering doesn't need Linkage at all.

  * JSGenericLowering doesn't need a full CompilationInfo*, just a
    single flag.

  * JSContextSpecializer doesn't need the full CompilationInfo, just a
    Context.

  * Removed unused CompilationInfo from SimplifiedLoweringTester.

This nicely decouples things already a bit more, but there's still
work to do...

Review URL: https://codereview.chromium.org/899803003

Cr-Commit-Position: refs/heads/master@{#26580}

BUG=

Review URL: https://codereview.chromium.org/898353002

Cr-Commit-Position: refs/heads/master@{#26576}

R=arv@chromium.org,rossberg@chromium.org
BUG=v8:3834
LOG=N

Committed: https://crrev.com/8aed43e82c6d2742fe5988603cb8841324cc942b
Cr-Commit-Position: refs/heads/master@{#26560}

Review URL: https://codereview.chromium.org/908883002

Cr-Commit-Position: refs/heads/master@{#26572}

Revert of new classes: implement new.target passing to superclass constructor. (patchset #9 id:150001 of https://codereview.chromium.org/908883002/)

Reason for revert:
Breaks Linux64 release

Original issue's description:
> new classes: implement new.target passing to superclass constructor.
>
> R=arv@chromium.org,rossberg@chromium.org
> BUG=v8:3834
> LOG=N
>
> Committed: https://crrev.com/8aed43e82c6d2742fe5988603cb8841324cc942b
> Cr-Commit-Position: refs/heads/master@{#26560}

TBR=arv@chromium.org,rossberg@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3834

Review URL: https://codereview.chromium.org/911363002

Cr-Commit-Position: refs/heads/master@{#26561}

R=arv@chromium.org,rossberg@chromium.org
BUG=v8:3834
LOG=N

Review URL: https://codereview.chromium.org/908883002

Cr-Commit-Position: refs/heads/master@{#26560}

Review URL: https://codereview.chromium.org/904693002

Cr-Commit-Position: refs/heads/master@{#26479}

Make sure the initial graph is fully populated with source position information and automatically propagate that information down through newly allocated nodes during reduction passes in the most unobtrusive way that's currently possible.

Review URL: https://codereview.chromium.org/897883002

Cr-Commit-Position: refs/heads/master@{#26459}

If a (pure) node has two or more uses, but there exists a path from the
common dominator of these uses to end, which does not contain a use,
then we split the node such that no unnecessary computation takes place.
Note however, that this only applies if the node cannot be hoisted out
of a loop.

BUG=v8:3864
LOG=n
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/899433005

Cr-Commit-Position: refs/heads/master@{#26404}

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/886313006

Cr-Commit-Position: refs/heads/master@{#26399}

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/877753007

Cr-Commit-Position: refs/heads/master@{#26346}

This reverts commit 6a4c0a3b and commit
0deaa4b6 for breaking GCC bots.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/893533003

Cr-Commit-Position: refs/heads/master@{#26342}

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/888613002

Cr-Commit-Position: refs/heads/master@{#26340}

Review URL: https://codereview.chromium.org/882973002

Cr-Commit-Position: refs/heads/master@{#26323}

R=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/877553007

Cr-Commit-Position: refs/heads/master@{#26318}

The lowering of intrinsics is therefore now decoupled from the general
inlining logic.

TEST=cctest,unittests
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/872363002

Cr-Commit-Position: refs/heads/master@{#26263}

Along the way:
- Thread isolate parameter explicitly through code that used to
  rely on getting it from the zone.
- Canonicalize the parameter position of isolate and zone for
  affected code
- Change Hydrogen New<> instruction templates to automatically
  pass isolate

R=mstarzinger@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/868883002

Cr-Commit-Position: refs/heads/master@{#26252}

R=titzer@chromium.org
TEST=mjsunit/regress/regress-crbug-451016
BUG=chromium:451016
LOG=N

Review URL: https://codereview.chromium.org/817293005

Cr-Commit-Position: refs/heads/master@{#26229}

BUG=

Review URL: https://codereview.chromium.org/816053002

Cr-Commit-Position: refs/heads/master@{#26149}

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/855873002

Cr-Commit-Position: refs/heads/master@{#26131}

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/826833004

Cr-Commit-Position: refs/heads/master@{#26104}

R=rossberg@chromium.org,jarin@chromium.org
TEST=cctest/test-run-jsops/ClassLiteral

Review URL: https://codereview.chromium.org/798873006

Cr-Commit-Position: refs/heads/master@{#26101}

BUG=

Review URL: https://codereview.chromium.org/798873008

Cr-Commit-Position: refs/heads/master@{#26074}

R=rossberg@chromium.org
TEST=cctest/test-run-jsbranches/ForOfContinueStatement

Review URL: https://codereview.chromium.org/850803002

Cr-Commit-Position: refs/heads/master@{#26060}

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/809333002

Cr-Commit-Position: refs/heads/master@{#26020}

- Use C++11 range based for loops.
- Remove duplicated virtual register set in unittests.
- Don't expose implementation details of InstructionSelector.

TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/837423002

Cr-Commit-Position: refs/heads/master@{#25997}

BUG=

Review URL: https://codereview.chromium.org/837173002

Cr-Commit-Position: refs/heads/master@{#25970}

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/810403003

Cr-Commit-Position: refs/heads/master@{#25968}

Introduce a new AnyToBoolean simplified operator to handle the later
lowering of boolean conversions. Previously we tried to hack that with
the generic JSToBoolean, having its context set to zero, but that lead
to various problems/bugs and did not handle all cases.

TEST=cctest,unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/800833003

Cr-Commit-Position: refs/heads/master@{#25958}

The CommonOperatorReducer currently takes care of redundant Phis,
EffectPhis and Selects. This functionality overlaps with ControlReducer,
but is required to make certain optimizations effective, since the
ControlReducer only runs really early and really late in the pipeline
and therefore other reducers aren't reapplied properly after redundant
phi/select elimination.

TEST=unittests
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/817243003

Cr-Commit-Position: refs/heads/master@{#25922}

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/809313002

Cr-Commit-Position: refs/heads/master@{#25874}

This greatly reduces the number of nodes in the graph (by more than 20x in
some extreme cases) for the Emscripten python interpreter main function.

BUG=v8:3763
LOG=y
TEST=cctest,mjsunit,unittests
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/802353003

Cr-Commit-Position: refs/heads/master@{#25840}

Reason for revert:
performance bots were unchanged by the original revert

Original issue's description:
> revert r25736
>
> R=bmeurer@chromium.org
>
> BUG=

TBR=bmeurer@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/787183003

Cr-Commit-Position: refs/heads/master@{#25801}

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/803493002

Cr-Commit-Position: refs/heads/master@{#25795}

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/800493002

Cr-Commit-Position: refs/heads/master@{#25794}

FINAL implies OVERRIDE, which in turn implies virtual, so there's no need to use
more than one of these. The Google C++ style guide even requires this, see
http://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Inheritance.

While we're here, port r24662 to x87.

The net result is that v8 compiles again with a current clang.

BUG=v8:3753
LOG=y

Review URL: https://codereview.chromium.org/797943002

Cr-Commit-Position: refs/heads/master@{#25792}

- Decouple JSBuiltinReducer from JSTypedLowering.
- Unify JSTypedLowering::ReduceJSToXXX() lowering.
- Cleanup several includes and forward declarations.
- Unify helper methods.

TEST=cctest
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/797903003

Cr-Commit-Position: refs/heads/master@{#25790}