MIPS: Port [turbofan] ARM64: Use zr for zeroing stack slots

MIPS: Port [turbofan] ARM64: Use zr for zeroing stack slots

Port f84f45f9ca808a0829df76bf9da712d4c1f51ed7

Original commit message:
When zeroing a floating point stack slot, store the zero register directly,
rather than storing zero moved to an FP register.

BUG=

Committed: https://crrev.com/298ef1728c6aa6511fb35e82b7097cd4cd23f8ba
Cr-Commit-Position: refs/heads/master@{#39906}

[ivica.bogosavljevic, 2016-09-23 13:14:19]

ivica.bogosavljevic@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, miran.karic@imgtec.com

[ivica.bogosavljevic, 2016-09-23 13:14:20]

PTAL

[akos.palfi.imgtec, 2016-09-30 08:33:28]

LGTM

[ivica.bogosavljevic, 2016-09-30 08:33:52]

The CQ bit was checked by ivica.bogosavljevic@imgtec.com to run a CQ dry run

[commit-bot: I haz the power, 2016-09-30 08:33:54]

Dry run: 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, 2016-09-30 09:03:09]

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

[commit-bot: I haz the power, 2016-09-30 09:03:10]

Dry run: This issue passed the CQ dry run.

[ivica.bogosavljevic, 2016-09-30 09:03:37]

The CQ bit was checked by ivica.bogosavljevic@imgtec.com

[commit-bot: I haz the power, 2016-09-30 09:03:41]

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, 2016-09-30 09:05:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-30 09:05:59]

Description was changed from

==========
MIPS: Port [turbofan] ARM64: Use zr for zeroing stack slots

Port f84f45f9ca808a0829df76bf9da712d4c1f51ed7

Original commit message:
When zeroing a floating point stack slot, store the zero register directly,
rather than storing zero moved to an FP register.

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

to

==========
MIPS: Port [turbofan] ARM64: Use zr for zeroing stack slots

Port f84f45f9ca808a0829df76bf9da712d4c1f51ed7

Original commit message:
When zeroing a floating point stack slot, store the zero register directly,
rather than storing zero moved to an FP register.

BUG=

Committed: https://crrev.com/298ef1728c6aa6511fb35e82b7097cd4cd23f8ba
Cr-Commit-Position: refs/heads/master@{#39906}
==========

[commit-bot: I haz the power, 2016-09-30 09:06:00]

Patchset 1 (id:??) landed as
https://crrev.com/298ef1728c6aa6511fb35e82b7097cd4cd23f8ba
Cr-Commit-Position: refs/heads/master@{#39906}