[ARM] Reserve scratch q-register.

[ARM] Reserve scratch q-register.
- Reserves q15 (d30,d31) as a scratch register for NEON operations.
- Rewrites CodeGenerator::AssembleSwap to use it.

LOG=N
BUG=v8:6020
Review-Url: https://codereview.chromium.org/2827743002
Cr-Commit-Position: refs/heads/master@{#44728}
Committed: https://chromium.googlesource.com/v8/v8/+/246a7bdd26198ea38d174797160631c6904966b7

[bbudge, 2017-04-18 18:40:08]

The CQ bit was checked by bbudge@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-18 18:40:16]

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, 2017-04-18 19:06:27]

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

[commit-bot: I haz the power, 2017-04-18 19:06:28]

Dry run: This issue passed the CQ dry run.

[bbudge, 2017-04-18 19:16:22]

bbudge@chromium.org changed reviewers:
+ bmeurer@chromium.org, martyn.capewell@arm.com

[bbudge, 2017-04-18 21:43:15]

The CQ bit was checked by bbudge@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-18 21:43:26]

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, 2017-04-18 21:49:16]

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

[commit-bot: I haz the power, 2017-04-18 21:49:17]

Dry run: Try jobs failed on following builders:
  v8_linux_arm_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel_ng/builds/...)

[bbudge, 2017-04-19 00:36:44]

The CQ bit was checked by bbudge@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-19 00:36:50]

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, 2017-04-19 01:01:39]

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

[commit-bot: I haz the power, 2017-04-19 01:01:40]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2017-04-19 03:58:27]

lgtm

[bbudge, 2017-04-19 16:55:06]

The CQ bit was checked by bbudge@chromium.org

[commit-bot: I haz the power, 2017-04-19 16:55:10]

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, 2017-04-19 16:56:42]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1492620906441800,
"parent_rev": "c9c7dd0d4ea6c43dedab9f902b018eb5f2c5faf1", "commit_rev":
"246a7bdd26198ea38d174797160631c6904966b7"}

[commit-bot: I haz the power, 2017-04-19 16:56:48]

Description was changed from

==========
[ARM] Reserve scratch q-register.
- Reserves q15 (d30,d31) as a scratch register for NEON operations.
- Rewrites CodeGenerator::AssembleSwap to use it.

LOG=N
BUG=v8:6020
==========

to

==========
[ARM] Reserve scratch q-register.
- Reserves q15 (d30,d31) as a scratch register for NEON operations.
- Rewrites CodeGenerator::AssembleSwap to use it.

LOG=N
BUG=v8:6020

Review-Url: https://codereview.chromium.org/2827743002
Cr-Commit-Position: refs/heads/master@{#44728}
Committed:
https://chromium.googlesource.com/v8/v8/+/246a7bdd26198ea38d174797160631c6904...
==========

[commit-bot: I haz the power, 2017-04-19 16:56:49]

Committed patchset #3 (id:40001) as
https://chromium.googlesource.com/v8/v8/+/246a7bdd26198ea38d174797160631c6904...