X87: [turbofan] Remove the FloatXXSubPreserveNan operators.

X87: [turbofan] Remove the FloatXXSubPreserveNan operators.

  port f8938e50964e7b83818a0fff7fc0f2b065f8bf49 (r38437)

  original commit message:
  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

BUG=

Committed: https://crrev.com/4a1ae109528f52a9e8d002321c448dcd5366763a
Cr-Commit-Position: refs/heads/master@{#38571}

[zhengxing.li, 2016-08-11 03:26:43]

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

[zhengxing.li, 2016-08-11 03:26:44]

PTAL, thanks!

[ahaas, 2016-08-11 06:39:21]

lgtm

[Weiliang, 2016-08-11 06:43:40]

lgtm

[zhengxing.li, 2016-08-11 08:34:56]

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

[commit-bot: I haz the power, 2016-08-11 08:35:02]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-11 08:56:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-11 08:56:14]

Description was changed from

==========
X87: [turbofan] Remove the FloatXXSubPreserveNan operators.

  port f8938e50964e7b83818a0fff7fc0f2b065f8bf49 (r38437)

  original commit message:
  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

BUG=
==========

to

==========
X87: [turbofan] Remove the FloatXXSubPreserveNan operators.

  port f8938e50964e7b83818a0fff7fc0f2b065f8bf49 (r38437)

  original commit message:
  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

BUG=

Committed: https://crrev.com/4a1ae109528f52a9e8d002321c448dcd5366763a
Cr-Commit-Position: refs/heads/master@{#38571}
==========

[commit-bot: I haz the power, 2016-08-11 08:56:15]

Patchset 1 (id:??) landed as
https://crrev.com/4a1ae109528f52a9e8d002321c448dcd5366763a
Cr-Commit-Position: refs/heads/master@{#38571}