[turbofan] Some strength reduction for ConvertTaggedHoleToUndefined.

[turbofan] Some strength reduction for ConvertTaggedHoleToUndefined.

We can fold ConvertTaggedHoleToUndefined into CheckNumber and
CheckTaggedSigned, as they deoptimize no matter if the input
is undefined or hole.

R=jarin@chromium.org

Committed: https://crrev.com/7ada01689958fc2a5a7029f5244463f56385fd50
Cr-Commit-Position: refs/heads/master@{#38576}

[Benedikt Meurer, 2016-08-11 10:54:28]

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

[commit-bot: I haz the power, 2016-08-11 10:54:36]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Jarin, 2016-08-11 10:59:03]

lgtm

[Benedikt Meurer, 2016-08-11 10:59:12]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-08-11 10:59:16]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-08-11 10:59:26]

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, 2016-08-11 11:08:55]

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

[commit-bot: I haz the power, 2016-08-11 11:08:56]

Try jobs failed on following builders:
  v8_linux64_gyp_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_gyp_rel_ng/build...)
  v8_linux64_gyp_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_gyp_rel_ng_trigg...)

[Benedikt Meurer, 2016-08-11 12:02:30]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-08-11 12:02:31]

The patchset sent to the CQ was uploaded after l-g-t-m from jarin@chromium.org
Link to the patchset: https://codereview.chromium.org/2233393002/#ps20001
(title: "Fix redness")

[commit-bot: I haz the power, 2016-08-11 12:02:39]

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, 2016-08-11 12:49:46]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-11 12:50:11]

Description was changed from

==========
[turbofan] Some strength reduction for ConvertTaggedHoleToUndefined.

We can fold ConvertTaggedHoleToUndefined into CheckNumber and
CheckTaggedSigned, as they deoptimize no matter if the input
is undefined or hole.

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

to

==========
[turbofan] Some strength reduction for ConvertTaggedHoleToUndefined.

We can fold ConvertTaggedHoleToUndefined into CheckNumber and
CheckTaggedSigned, as they deoptimize no matter if the input
is undefined or hole.

R=jarin@chromium.org

Committed: https://crrev.com/7ada01689958fc2a5a7029f5244463f56385fd50
Cr-Commit-Position: refs/heads/master@{#38576}
==========

[commit-bot: I haz the power, 2016-08-11 12:50:12]

Patchset 2 (id:??) landed as
https://crrev.com/7ada01689958fc2a5a7029f5244463f56385fd50
Cr-Commit-Position: refs/heads/master@{#38576}