[turbofan] Restore i32+i32->i32 handling in representation inference.

[turbofan] Restore i32+i32->i32 handling in representation inference.

This restores the case that was removed by

commit f0e41175fde3d86f3790d69dfa6c9cb0a01eaad2
Author: jarin <jarin@chromium.org>;
Date:   Tue Jan 5 03:56:04 2016 -0800

    [turbofan] Bidirectional representation inference.

BUG=v8:4667
LOG=n
R=bmeurer@chromium.org

Committed: https://crrev.com/59ff83f6b0096dfd6572dd24c6b165ff6a58d328
Cr-Commit-Position: refs/heads/master@{#33292}

[Jarin, 2016-01-14 08:43:30]

Could you take a look, please?

[Benedikt Meurer, 2016-01-14 11:19:17]

lgtm

[Jarin, 2016-01-14 11:44:41]

The CQ bit was checked by jarin@chromium.org

[commit-bot: I haz the power, 2016-01-14 11:44:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1584913003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1584913003/20001

[commit-bot: I haz the power, 2016-01-14 11:49:22]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-01-14 11:50:26]

Description was changed from

==========
[turbofan] Restore i32+i32->i32 handling in representation inference.

This restores the case that was removed by

commit f0e41175fde3d86f3790d69dfa6c9cb0a01eaad2
Author: jarin <jarin@chromium.org>
Date:   Tue Jan 5 03:56:04 2016 -0800

    [turbofan] Bidirectional representation inference.


BUG=v8:4667
LOG=n
R=bmeurer@chromium.org
==========

to

==========
[turbofan] Restore i32+i32->i32 handling in representation inference.

This restores the case that was removed by

commit f0e41175fde3d86f3790d69dfa6c9cb0a01eaad2
Author: jarin <jarin@chromium.org>
Date:   Tue Jan 5 03:56:04 2016 -0800

    [turbofan] Bidirectional representation inference.

BUG=v8:4667
LOG=n
R=bmeurer@chromium.org

Committed: https://crrev.com/59ff83f6b0096dfd6572dd24c6b165ff6a58d328
Cr-Commit-Position: refs/heads/master@{#33292}
==========

[commit-bot: I haz the power, 2016-01-14 11:50:27]

Patchset 2 (id:??) landed as
https://crrev.com/59ff83f6b0096dfd6572dd24c6b165ff6a58d328
Cr-Commit-Position: refs/heads/master@{#33292}