[turbofan] Fix CheckedInt32Mod lowering for -0 case with negative left hand side.

[turbofan] Fix CheckedInt32Mod lowering for -0 case with negative left hand side.

Properly deoptimize if the left hand side of a CheckedInt32Mod is
negative and the result of the operation is zero.

R=jarin@chromium.org
BUG=v8:5286
Committed: https://crrev.com/665f0e40209744758d75ddb9f0ca1736947c34b5
Cr-Commit-Position: refs/heads/master@{#38615}

[Benedikt Meurer, 2016-08-12 11:42:16]

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

[commit-bot: I haz the power, 2016-08-12 11:42:27]

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

[Benedikt Meurer, 2016-08-12 11:42:51]

Hey Jaro,

Here's yet another minus zero.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-08-12 11:52:29]

lgtm

[Benedikt Meurer, 2016-08-12 11:53:32]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-08-12 11:53:40]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-08-12 11:53:48]

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, 2016-08-12 12:13:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-12 12:13:56]

Description was changed from

==========
[turbofan] Fix CheckedInt32Mod lowering for -0 case with negative left hand
side.

Properly deoptimize if the left hand side of a CheckedInt32Mod is
negative and the result of the operation is zero.

R=jarin@chromium.org
BUG=v8:5286
==========

to

==========
[turbofan] Fix CheckedInt32Mod lowering for -0 case with negative left hand
side.

Properly deoptimize if the left hand side of a CheckedInt32Mod is
negative and the result of the operation is zero.

R=jarin@chromium.org
BUG=v8:5286

Committed: https://crrev.com/665f0e40209744758d75ddb9f0ca1736947c34b5
Cr-Commit-Position: refs/heads/master@{#38615}
==========

[commit-bot: I haz the power, 2016-08-12 12:13:57]

Patchset 1 (id:??) landed as
https://crrev.com/665f0e40209744758d75ddb9f0ca1736947c34b5
Cr-Commit-Position: refs/heads/master@{#38615}