[turbofan] Lower "-0.0 - x" in the MachineOperatorReducer.

[turbofan] Lower "-0.0 - x" in the MachineOperatorReducer.

Up until now "-0.0 - x" was lowered in the instruction selector. I moved
the lowering now to the MachineOperatorReducer.

I did not remove the lowering from the instruction selector yet, I would
prefer to do that in a separate CL.

R=bmeurer@chromium.org

Committed: https://crrev.com/552601bb5f4158f6d9ca6d4da8cab31cc79dd1b9
Cr-Commit-Position: refs/heads/master@{#38417}

[ahaas, 2016-08-08 08:10:58]

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

[commit-bot: I haz the power, 2016-08-08 08:11:04]

Dry run: 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, 2016-08-08 08:35:26]

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

[commit-bot: I haz the power, 2016-08-08 08:35:27]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2016-08-08 08:37:19]

lgtm

[ahaas, 2016-08-08 08:37:36]

The CQ bit was checked by ahaas@chromium.org

[commit-bot: I haz the power, 2016-08-08 08:37:44]

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, 2016-08-08 08:39:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-08 08:40:47]

Description was changed from

==========
[turbofan] Lower "-0.0 - x" in the MachineOperatorReducer.

Up until now "-0.0 - x" was lowered in the instruction selector. I moved
the lowering now to the MachineOperatorReducer.

I did not remove the lowering from the instruction selector yet, I would
prefer to do that in a separate CL.

R=bmeurer@chromium.org
==========

to

==========
[turbofan] Lower "-0.0 - x" in the MachineOperatorReducer.

Up until now "-0.0 - x" was lowered in the instruction selector. I moved
the lowering now to the MachineOperatorReducer.

I did not remove the lowering from the instruction selector yet, I would
prefer to do that in a separate CL.

R=bmeurer@chromium.org

Committed: https://crrev.com/552601bb5f4158f6d9ca6d4da8cab31cc79dd1b9
Cr-Commit-Position: refs/heads/master@{#38417}
==========

[commit-bot: I haz the power, 2016-08-08 08:40:48]

Patchset 1 (id:??) landed as
https://crrev.com/552601bb5f4158f6d9ca6d4da8cab31cc79dd1b9
Cr-Commit-Position: refs/heads/master@{#38417}