PPC/s390: [turbofan] Remove the FloatXXSubPreserveNan operators.

PPC/s390: [turbofan] Remove the FloatXXSubPreserveNan operators.

Port f8938e50964e7b83818a0fff7fc0f2b065f8bf49

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

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

BUG=
LOG=N

Committed: https://crrev.com/2b15dd52ad7bdc041e2b7bd4a3b3f230580778e3
Cr-Commit-Position: refs/heads/master@{#38524}

[john.yan, 2016-08-09 13:48:42]

lgtm

[JaideepBajwa, 2016-08-09 13:50:01]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2016-08-09 13:50:07]

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, 2016-08-09 14:09:59]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-09 14:10:00]

Failed to commit the patch.

[JaideepBajwa, 2016-08-09 14:47:25]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2016-08-09 14:47:28]

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, 2016-08-09 14:49:15]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-09 14:49:16]

Failed to commit the patch.

[Michael Hablich, 2016-08-10 08:57:54]

The CQ bit was checked by hablich@chromium.org

[commit-bot: I haz the power, 2016-08-10 08:58:03]

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, 2016-08-10 09:03:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-10 09:04:04]

Description was changed from

==========
PPC/s390: [turbofan] Remove the FloatXXSubPreserveNan operators.

Port f8938e50964e7b83818a0fff7fc0f2b065f8bf49

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

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

BUG=
LOG=N
==========

to

==========
PPC/s390: [turbofan] Remove the FloatXXSubPreserveNan operators.

Port f8938e50964e7b83818a0fff7fc0f2b065f8bf49

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

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

BUG=
LOG=N

Committed: https://crrev.com/2b15dd52ad7bdc041e2b7bd4a3b3f230580778e3
Cr-Commit-Position: refs/heads/master@{#38524}
==========

[commit-bot: I haz the power, 2016-08-10 09:04:06]

Patchset 1 (id:??) landed as
https://crrev.com/2b15dd52ad7bdc041e2b7bd4a3b3f230580778e3
Cr-Commit-Position: refs/heads/master@{#38524}