[turbofan] Slightly improve typing rule for NumberSubtract.

[turbofan] Slightly improve typing rule for NumberSubtract.

Properly figure out NaN and -0 cases even for non-integer inputs. This
helps to reduce the number of checks we have to perform in case we try
to go back to int32 after a floating point operation.

R=epertoso@chromium.org

Committed: https://crrev.com/288066e50158f44fc4acbdef93270b751bc2c7cb
Cr-Commit-Position: refs/heads/master@{#38415}

[Benedikt Meurer, 2016-08-08 07:41:03]

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

[commit-bot: I haz the power, 2016-08-08 07:41:14]

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

[Benedikt Meurer, 2016-08-08 07:41:58]

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

[Benedikt Meurer, 2016-08-08 07:41:58]

Hey Enrico,

This is brining the NumberSubtract rule in line with the others.
Please take a look.

Thanks,
Benedikt

[Benedikt Meurer, 2016-08-08 07:42:11]

Description was changed from

==========
[turbofan] Slightly improve typing rule for NumberSubtract.

Properly figure out NaN and -0 cases even for non-integer inputs. This
helps to reduce the number of checks we have to perform in case we try
to go back to int32 after a floating point operation.

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

to

==========
[turbofan] Slightly improve typing rule for NumberSubtract.

Properly figure out NaN and -0 cases even for non-integer inputs. This
helps to reduce the number of checks we have to perform in case we try
to go back to int32 after a floating point operation.

R=epertoso@chromium.org
==========

[epertoso, 2016-08-08 07:50:08]

lgtm

[Benedikt Meurer, 2016-08-08 08:00:12]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-08-08 08:00:17]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-08-08 08:00:25]

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 08:02:44]

Description was changed from

==========
[turbofan] Slightly improve typing rule for NumberSubtract.

Properly figure out NaN and -0 cases even for non-integer inputs. This
helps to reduce the number of checks we have to perform in case we try
to go back to int32 after a floating point operation.

R=epertoso@chromium.org
==========

to

==========
[turbofan] Slightly improve typing rule for NumberSubtract.

Properly figure out NaN and -0 cases even for non-integer inputs. This
helps to reduce the number of checks we have to perform in case we try
to go back to int32 after a floating point operation.

R=epertoso@chromium.org
==========

[commit-bot: I haz the power, 2016-08-08 08:02:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-08 08:03:20]

Description was changed from

==========
[turbofan] Slightly improve typing rule for NumberSubtract.

Properly figure out NaN and -0 cases even for non-integer inputs. This
helps to reduce the number of checks we have to perform in case we try
to go back to int32 after a floating point operation.

R=epertoso@chromium.org
==========

to

==========
[turbofan] Slightly improve typing rule for NumberSubtract.

Properly figure out NaN and -0 cases even for non-integer inputs. This
helps to reduce the number of checks we have to perform in case we try
to go back to int32 after a floating point operation.

R=epertoso@chromium.org

Committed: https://crrev.com/288066e50158f44fc4acbdef93270b751bc2c7cb
Cr-Commit-Position: refs/heads/master@{#38415}
==========

[commit-bot: I haz the power, 2016-08-08 08:03:21]

Patchset 1 (id:??) landed as
https://crrev.com/288066e50158f44fc4acbdef93270b751bc2c7cb
Cr-Commit-Position: refs/heads/master@{#38415}