[turbofan] Generalize representation inference for NumberAdd.

[turbofan] Generalize representation inference for NumberAdd.

This should fix the Turbofan Octane/Mandreel regression introduced by

commit 9ea551aa450f818540bcc47445f9ea6be8f32ab8
Author: jarin <jarin@chromium.org>;
Date:   Sun Nov 22 05:45:38 2015 -0800

    [turbofan] Simplify lowering of number addition.

    Review URL: https://codereview.chromium.org/1471533002

    Cr-Commit-Position: refs/heads/master@{#32159}

Committed: https://crrev.com/d5e5e1e16161a7e5bf57ab3c2c16ba0839c414ed
Cr-Commit-Position: refs/heads/master@{#32304}

[Jarin, 2015-11-25 15:20:33]

jarin@chromium.org changed reviewers:
+ bmeurer@chromium.org

[Jarin, 2015-11-25 15:20:34]

Could you take a look, please?

[Benedikt Meurer, 2015-11-25 16:56:09]

LGTM.

[Jarin, 2015-11-25 19:13:01]

The CQ bit was checked by jarin@chromium.org

[commit-bot: I haz the power, 2015-11-25 19:13:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1477803002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1477803002/1

[commit-bot: I haz the power, 2015-11-25 20:10:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-25 20:10:29]

Description was changed from

==========
[turbofan] Generalize representation inference for NumberAdd.

This should fix the Turbofan Octane/Mandreel regression introduced by

commit 9ea551aa450f818540bcc47445f9ea6be8f32ab8
Author: jarin <jarin@chromium.org>
Date:   Sun Nov 22 05:45:38 2015 -0800

    [turbofan] Simplify lowering of number addition.

    Review URL: https://codereview.chromium.org/1471533002

    Cr-Commit-Position: refs/heads/master@{#32159}
==========

to

==========
[turbofan] Generalize representation inference for NumberAdd.

This should fix the Turbofan Octane/Mandreel regression introduced by

commit 9ea551aa450f818540bcc47445f9ea6be8f32ab8
Author: jarin <jarin@chromium.org>
Date:   Sun Nov 22 05:45:38 2015 -0800

    [turbofan] Simplify lowering of number addition.

    Review URL: https://codereview.chromium.org/1471533002

    Cr-Commit-Position: refs/heads/master@{#32159}

Committed: https://crrev.com/d5e5e1e16161a7e5bf57ab3c2c16ba0839c414ed
Cr-Commit-Position: refs/heads/master@{#32304}
==========

[commit-bot: I haz the power, 2015-11-25 20:10:29]

Patchset 1 (id:??) landed as
https://crrev.com/d5e5e1e16161a7e5bf57ab3c2c16ba0839c414ed
Cr-Commit-Position: refs/heads/master@{#32304}