Reland of [turbofan] ARM: Improve AND instruction selection

Reland of [turbofan] ARM: Improve AND instruction selection

Improve instruction selector for mask and shift operations by using cheaper
instructions where possible, in preference to UBFX.

Reverted because it was suspected of causing a couple of flaky tests to fail,
but investigation suggests this is unlikely.

Original review: https://codereview.chromium.org/1677023002

BUG=

Committed: https://crrev.com/357e0143293a29661bb590b3cee517e5fc6c40ec
Cr-Commit-Position: refs/heads/master@{#33988}

[martyn.capewell, 2016-02-12 15:26:13]

Description was changed from

==========
Reland of [turbofan] ARM: Improve AND instruction selection

Improve instruction selector for mask and shift operations by using cheaper
instructions where possible, in preference to UBFX.

Reverted because it was suspected of causing a couple of flaky tests to fail,
but investigation suggests this is unlikely.

Original review: https://codereview.chromium.org/1677023002

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

to

==========
Reland of [turbofan] ARM: Improve AND instruction selection

Improve instruction selector for mask and shift operations by using cheaper
instructions where possible, in preference to UBFX.

Reverted because it was suspected of causing a couple of flaky tests to fail,
but investigation suggests this is unlikely.

Original review: https://codereview.chromium.org/1677023002

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

[martyn.capewell, 2016-02-12 15:26:14]

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

[Benedikt Meurer, 2016-02-12 17:38:20]

Still LGTM. :-)

[Michael Achenbach, 2016-02-12 19:12:40]

lgtm

[martyn.capewell, 2016-02-15 10:41:44]

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

[commit-bot: I haz the power, 2016-02-15 10:41:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1684073006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1684073006/1

[commit-bot: I haz the power, 2016-02-15 11:09:56]

Description was changed from

==========
Reland of [turbofan] ARM: Improve AND instruction selection

Improve instruction selector for mask and shift operations by using cheaper
instructions where possible, in preference to UBFX.

Reverted because it was suspected of causing a couple of flaky tests to fail,
but investigation suggests this is unlikely.

Original review: https://codereview.chromium.org/1677023002

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

to

==========
Reland of [turbofan] ARM: Improve AND instruction selection

Improve instruction selector for mask and shift operations by using cheaper
instructions where possible, in preference to UBFX.

Reverted because it was suspected of causing a couple of flaky tests to fail,
but investigation suggests this is unlikely.

Original review: https://codereview.chromium.org/1677023002

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

[commit-bot: I haz the power, 2016-02-15 11:09:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-15 11:10:22]

Description was changed from

==========
Reland of [turbofan] ARM: Improve AND instruction selection

Improve instruction selector for mask and shift operations by using cheaper
instructions where possible, in preference to UBFX.

Reverted because it was suspected of causing a couple of flaky tests to fail,
but investigation suggests this is unlikely.

Original review: https://codereview.chromium.org/1677023002

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

to

==========
Reland of [turbofan] ARM: Improve AND instruction selection

Improve instruction selector for mask and shift operations by using cheaper
instructions where possible, in preference to UBFX.

Reverted because it was suspected of causing a couple of flaky tests to fail,
but investigation suggests this is unlikely.

Original review: https://codereview.chromium.org/1677023002

BUG=

Committed: https://crrev.com/357e0143293a29661bb590b3cee517e5fc6c40ec
Cr-Commit-Position: refs/heads/master@{#33988}
==========

[commit-bot: I haz the power, 2016-02-15 11:10:22]

Patchset 1 (id:??) landed as
https://crrev.com/357e0143293a29661bb590b3cee517e5fc6c40ec
Cr-Commit-Position: refs/heads/master@{#33988}