[turbofan] Add constant-folding for Float64RoundDown.

[turbofan] Add constant-folding for Float64RoundDown.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2616613002
Cr-Commit-Position: refs/heads/master@{#42058}
Committed: https://chromium.googlesource.com/v8/v8/+/c1a0e8567a209ee399517aaacb14c89a1ecee3b3

[Benedikt Meurer, 2017-01-04 08:04:20]

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

[commit-bot: I haz the power, 2017-01-04 08:04:24]

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

[Jarin, 2017-01-04 08:06:46]

lgtm

[Benedikt Meurer, 2017-01-04 08:07:11]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2017-01-04 08:07:13]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2017-01-04 08:07:24]

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, 2017-01-04 08:29:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1483517233617510, "parent_rev":
"d946a27e039457514db31a9da319d72a33c4e732", "commit_rev":
"c1a0e8567a209ee399517aaacb14c89a1ecee3b3"}

[commit-bot: I haz the power, 2017-01-04 08:29:55]

Description was changed from

==========
[turbofan] Add constant-folding for Float64RoundDown.

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

to

==========
[turbofan] Add constant-folding for Float64RoundDown.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2616613002
Cr-Commit-Position: refs/heads/master@{#42058}
Committed:
https://chromium.googlesource.com/v8/v8/+/c1a0e8567a209ee399517aaacb14c89a1ec...
==========

[commit-bot: I haz the power, 2017-01-04 08:29:56]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/c1a0e8567a209ee399517aaacb14c89a1ec...