X87: enable the X87 turbofan support.

X87: enable the X87 turbofan support.

    This patch includes the following changes.
     1, Enable the turbofan backend support for X87 platform. It depends on previous CL: 3fdfebd26.
     2, Enable the test cases which are disabled because turbofan for X87 was not enabled.

BUG=v8:4135
LOG=N

Committed: https://crrev.com/ebb0f9e52e32832de470cbe8a068e4218e584aae
Cr-Commit-Position: refs/heads/master@{#29049}

[chunyang.dai, 2015-06-11 10:15:15]

Patchset #1 (id:1) has been deleted

[chunyang.dai, 2015-06-11 10:44:55]

Patchset #1 (id:20001) has been deleted

[chunyang.dai, 2015-06-15 03:43:05]

Patchset #2 (id:60001) has been deleted

[chunyang.dai, 2015-06-15 04:45:46]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-06-15 04:45:47]

PTAL.

[Weiliang, 2015-06-15 06:14:30]

please run "git cl format" before uploading patch.

https://codereview.chromium.org/1179763004/diff/100001/src/compiler/x87/instr...
File src/compiler/x87/instruction-selector-x87.cc (right):

https://codereview.chromium.org/1179763004/diff/100001/src/compiler/x87/instr...
src/compiler/x87/instruction-selector-x87.cc:1293: /* Float64Matcher
mleft(left);
remove the comments code

https://codereview.chromium.org/1179763004/diff/100001/src/x87/assembler-x87.h
File src/x87/assembler-x87.h (right):

https://codereview.chromium.org/1179763004/diff/100001/src/x87/assembler-x87....
src/x87/assembler-x87.h:155: static int NumAllocatableRegistersForTurbo() {
no use code, just delete it.

[Weiliang, 2015-06-15 06:26:04]

LGTM, but CL still needs LGTM from V8 team. 
@danno, @Titzer

Thanks
-Weiliang

[chunyang.dai, 2015-06-15 06:33:45]

chunyang.dai@intel.com changed reviewers:
+ danno@chromium.org, titzer@chromium.org

[chunyang.dai, 2015-06-15 06:33:46]

Hello, Danno & Titizer.

PTAL.

thanks.

[danno, 2015-06-16 10:54:29]

danno@chromium.org changed reviewers:
+ bmeurer@chromium.org, mstarzinger@chromium.org

[danno, 2015-06-16 10:54:30]

With Ben and I both traveling, it's probably better that Benedikt or Michi
review this.

[Benedikt Meurer, 2015-06-16 10:58:29]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2015-06-16 10:58:29]

lgtm

[commit-bot: I haz the power, 2015-06-16 10:58:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1179763004/120001

[commit-bot: I haz the power, 2015-06-16 11:23:11]

Committed patchset #4 (id:120001)

[commit-bot: I haz the power, 2015-06-16 11:23:31]

Patchset 4 (id:??) landed as
https://crrev.com/ebb0f9e52e32832de470cbe8a068e4218e584aae
Cr-Commit-Position: refs/heads/master@{#29049}