[turbofan] ARM64: Faster checked ops for PoT arrays

[turbofan] ARM64: Faster checked ops for PoT arrays

Improve CheckedLoad and Store bounds checking for arrays with power of two
length.

BUG=

Committed: https://crrev.com/95f210d5626fd048af6bc45386820657240e02a1
Cr-Commit-Position: refs/heads/master@{#36756}

[martyn.capewell, 2016-06-06 10:19:02]

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

[epertoso, 2016-06-06 14:19:57]

lgtm

[martyn.capewell, 2016-06-06 14:31:33]

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

[commit-bot: I haz the power, 2016-06-06 14:31:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2043663002/1

[commit-bot: I haz the power, 2016-06-06 15:00:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-06 15:02:14]

Description was changed from

==========
[turbofan] ARM64: Faster checked ops for PoT arrays

Improve CheckedLoad and Store bounds checking for arrays with power of two
length.

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

to

==========
[turbofan] ARM64: Faster checked ops for PoT arrays

Improve CheckedLoad and Store bounds checking for arrays with power of two
length.

BUG=

Committed: https://crrev.com/95f210d5626fd048af6bc45386820657240e02a1
Cr-Commit-Position: refs/heads/master@{#36756}
==========

[commit-bot: I haz the power, 2016-06-06 15:02:15]

Patchset 1 (id:??) landed as
https://crrev.com/95f210d5626fd048af6bc45386820657240e02a1
Cr-Commit-Position: refs/heads/master@{#36756}