[turbofan] Move MulHigh asr onto add on ARM64

[turbofan] Move MulHigh asr onto add on ARM64

Move the arithmetic shift from Int32MulHigh to a following Int32Add on ARM64.
This graph is commonly generated on reduction of signed integer division.

Committed: https://crrev.com/7374e6dc8955c41e7046573837ddedd78033c3a8
Cr-Commit-Position: refs/heads/master@{#29380}

[martyn.capewell, 2015-06-30 12:45:14]

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

[Benedikt Meurer, 2015-06-30 12:59:59]

LGTM.

[martyn.capewell, 2015-06-30 13:06:43]

The CQ bit was checked by martyn.capewell@arm.com

[commit-bot: I haz the power, 2015-06-30 13:06:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1209413008/1

[commit-bot: I haz the power, 2015-06-30 13:06:51]

The author martyn.capewell@arm.com has not signed Google Contributor License
Agreement. Please visit https://cla.developers.google.com to sign and manage
CLA.

[commit-bot: I haz the power, 2015-06-30 13:30:55]

The author martyn.capewell@arm.com has not signed Google Contributor License
Agreement. Please visit https://cla.developers.google.com to sign and manage
CLA.

[commit-bot: I haz the power, 2015-06-30 13:40:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-30 13:40:13]

Patchset 1 (id:??) landed as
https://crrev.com/7374e6dc8955c41e7046573837ddedd78033c3a8
Cr-Commit-Position: refs/heads/master@{#29380}