[turbofan] Optimize CheckedInt32Mod with unknown power of 2 right hand side.

[turbofan] Optimize CheckedInt32Mod with unknown power of 2 right hand side.

We have a similar optimization for unchecked integer modulus, which
already boosted some asm.js use cases. Now this optimization is almost
as effcient as Crankshafts known power of 2 right hand side optimization
for modulus, but it can still deal with any rhs (except 0), and doesn't
require the interpreter to also collect known power of two rhs feedback.

R=jarin@chromium.org

Committed: https://crrev.com/b418b2c419429bdac1527fa1e32325e97e75a8ad
Cr-Commit-Position: refs/heads/master@{#38187}

[Benedikt Meurer, 2016-07-29 19:37:34]

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

[commit-bot: I haz the power, 2016-07-29 19:37:42]

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, 2016-07-29 19:58:12]

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

[commit-bot: I haz the power, 2016-07-29 19:58:13]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2016-07-30 17:58:40]

Hey Jaro,

Here's the follow up fix for audio-oscillator that Michael asked me to take
over. Pretty straight forward.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-07-30 18:20:48]

lgtm

[Benedikt Meurer (Google), 2016-07-30 19:47:49]

The CQ bit was checked by bmeurer@google.com

[commit-bot: I haz the power, 2016-07-30 19:48:01]

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, 2016-07-30 20:08:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-30 20:12:04]

Description was changed from

==========
[turbofan] Optimize CheckedInt32Mod with unknown power of 2 right hand side.

We have a similar optimization for unchecked integer modulus, which
already boosted some asm.js use cases. Now this optimization is almost
as effcient as Crankshafts known power of 2 right hand side optimization
for modulus, but it can still deal with any rhs (except 0), and doesn't
require the interpreter to also collect known power of two rhs feedback.

R=jarin@chromium.org
==========

to

==========
[turbofan] Optimize CheckedInt32Mod with unknown power of 2 right hand side.

We have a similar optimization for unchecked integer modulus, which
already boosted some asm.js use cases. Now this optimization is almost
as effcient as Crankshafts known power of 2 right hand side optimization
for modulus, but it can still deal with any rhs (except 0), and doesn't
require the interpreter to also collect known power of two rhs feedback.

R=jarin@chromium.org

Committed: https://crrev.com/b418b2c419429bdac1527fa1e32325e97e75a8ad
Cr-Commit-Position: refs/heads/master@{#38187}
==========

[commit-bot: I haz the power, 2016-07-30 20:12:05]

Patchset 1 (id:??) landed as
https://crrev.com/b418b2c419429bdac1527fa1e32325e97e75a8ad
Cr-Commit-Position: refs/heads/master@{#38187}