X87: [compiler] Introduce StringEqualStub and StringNotEqualStub.

X87: [compiler] Introduce StringEqualStub and StringNotEqualStub.

  port 2689548e38c68bb6294fed5e2d83feec67e3a1f4 (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=

Committed: https://crrev.com/1a73d99e92febf6aba925c1d9abfd56bca3acae1
Cr-Commit-Position: refs/heads/master@{#34479}

[zhengxing.li, 2016-03-04 01:54:47]

zhengxing.li@intel.com changed reviewers:
+ bmeurer@chromium.org, chunyang.dai@intel.com, weiliang.lin@intel.com

[zhengxing.li, 2016-03-04 01:54:47]

PTAL, thanks!

[Weiliang, 2016-03-04 05:57:46]

lgtm

[zhengxing.li, 2016-03-04 07:02:58]

The CQ bit was checked by zhengxing.li@intel.com

[commit-bot: I haz the power, 2016-03-04 07:03:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1760343002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1760343002/1

[commit-bot: I haz the power, 2016-03-04 07:25:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-04 07:25:33]

Description was changed from

==========
X87: [compiler] Introduce StringEqualStub and StringNotEqualStub.

  port 2689548e38c68bb6294fed5e2d83feec67e3a1f4 (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=
==========

to

==========
X87: [compiler] Introduce StringEqualStub and StringNotEqualStub.

  port 2689548e38c68bb6294fed5e2d83feec67e3a1f4 (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=

Committed: https://crrev.com/1a73d99e92febf6aba925c1d9abfd56bca3acae1
Cr-Commit-Position: refs/heads/master@{#34479}
==========

[commit-bot: I haz the power, 2016-03-04 07:25:34]

Patchset 1 (id:??) landed as
https://crrev.com/1a73d99e92febf6aba925c1d9abfd56bca3acae1
Cr-Commit-Position: refs/heads/master@{#34479}