[turbofan] Make MachineType a pair of enums.

[turbofan] Make MachineType a pair of enums.

MachineType is now a class with two enum fields:
- MachineRepresentation
- MachineSemantic

Both enums are usable on their own, and this change switches some places from using MachineType to use just MachineRepresentation. Most notably:
- register allocator now uses just the representation.
- Phi and Select nodes only refer to representations.

Committed: https://crrev.com/bb2a830debbff19cf5a510c920ff9ac88d41355c
Cr-Commit-Position: refs/heads/master@{#32738}

[Jarin, 2015-12-10 08:27:55]

Description was changed from

==========
[turbofan] Make MachineType a pair of enums.
==========

to

==========
[turbofan] Make MachineType a pair of enums.

MachineType is now a class with two enum fields:
- MachineRepresentation
- MachineSemantic

Both enums are usable on their own, and this change switches some places from
using MachineType to use just MachineRepresentation. Most notably:
- register allocator now uses just the representation.
- Phi and Select nodes only refer to representations.
==========

[Jarin, 2015-12-10 08:27:55]

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

[Jarin, 2015-12-10 08:28:20]

Could you take a look, please?

[Benedikt Meurer, 2015-12-10 09:00:29]

Awesome, LGTM.

[Jarin, 2015-12-10 09:00:45]

The CQ bit was checked by jarin@chromium.org

[commit-bot: I haz the power, 2015-12-10 09:01:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1513543003/170001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1513543003/170001

[commit-bot: I haz the power, 2015-12-10 09:03:37]

Description was changed from

==========
[turbofan] Make MachineType a pair of enums.

MachineType is now a class with two enum fields:
- MachineRepresentation
- MachineSemantic

Both enums are usable on their own, and this change switches some places from
using MachineType to use just MachineRepresentation. Most notably:
- register allocator now uses just the representation.
- Phi and Select nodes only refer to representations.
==========

to

==========
[turbofan] Make MachineType a pair of enums.

MachineType is now a class with two enum fields:
- MachineRepresentation
- MachineSemantic

Both enums are usable on their own, and this change switches some places from
using MachineType to use just MachineRepresentation. Most notably:
- register allocator now uses just the representation.
- Phi and Select nodes only refer to representations.
==========

[commit-bot: I haz the power, 2015-12-10 09:03:38]

Committed patchset #10 (id:170001)

[commit-bot: I haz the power, 2015-12-10 09:03:58]

Description was changed from

==========
[turbofan] Make MachineType a pair of enums.

MachineType is now a class with two enum fields:
- MachineRepresentation
- MachineSemantic

Both enums are usable on their own, and this change switches some places from
using MachineType to use just MachineRepresentation. Most notably:
- register allocator now uses just the representation.
- Phi and Select nodes only refer to representations.
==========

to

==========
[turbofan] Make MachineType a pair of enums.

MachineType is now a class with two enum fields:
- MachineRepresentation
- MachineSemantic

Both enums are usable on their own, and this change switches some places from
using MachineType to use just MachineRepresentation. Most notably:
- register allocator now uses just the representation.
- Phi and Select nodes only refer to representations.

Committed: https://crrev.com/bb2a830debbff19cf5a510c920ff9ac88d41355c
Cr-Commit-Position: refs/heads/master@{#32738}
==========

[commit-bot: I haz the power, 2015-12-10 09:03:59]

Patchset 10 (id:??) landed as
https://crrev.com/bb2a830debbff19cf5a510c920ff9ac88d41355c
Cr-Commit-Position: refs/heads/master@{#32738}