[turbofan] Drop the obsolete TypeGuard operator.

[turbofan] Drop the obsolete TypeGuard operator.

The only real use case left for TypeGuard was the renaming inside the
LoadElimination, but this case only occurs in dead code (guarded by a
previous Check), so it's not relevant, and we can drop the TypeGuard
operator completely.

R=jarin@chromium.org

Committed: https://crrev.com/be32c055f19d68c418148dd75a2fe8b8da9c1f61
Cr-Commit-Position: refs/heads/master@{#37361}

[Benedikt Meurer, 2016-06-29 05:59:34]

Hey Jaro,

Dropping the TypeGuard completely.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-06-29 06:07:06]

lgtm

[Benedikt Meurer, 2016-06-29 06:07:26]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-06-29 06:07:32]

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

[commit-bot: I haz the power, 2016-06-29 06:07:33]

This CL has an open dependency (Issue 2109483004 Patch 20001). Please resolve
the dependency and try again.
If you are sure that there is no real dependency, please use one of the options
listed in https://goo.gl/9Es4OR to land the CL.

[Benedikt Meurer, 2016-06-29 06:07:54]

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

[commit-bot: I haz the power, 2016-06-29 06:08:05]

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, 2016-06-29 06:26:51]

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

[commit-bot: I haz the power, 2016-06-29 06:26:52]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2016-06-29 06:31:46]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-06-29 06:32:00]

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, 2016-06-29 06:34:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-29 06:36:19]

Description was changed from

==========
[turbofan] Drop the obsolete TypeGuard operator.

The only real use case left for TypeGuard was the renaming inside the
LoadElimination, but this case only occurs in dead code (guarded by a
previous Check), so it's not relevant, and we can drop the TypeGuard
operator completely.

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

to

==========
[turbofan] Drop the obsolete TypeGuard operator.

The only real use case left for TypeGuard was the renaming inside the
LoadElimination, but this case only occurs in dead code (guarded by a
previous Check), so it's not relevant, and we can drop the TypeGuard
operator completely.

R=jarin@chromium.org

Committed: https://crrev.com/be32c055f19d68c418148dd75a2fe8b8da9c1f61
Cr-Commit-Position: refs/heads/master@{#37361}
==========

[commit-bot: I haz the power, 2016-06-29 06:36:20]

Patchset 1 (id:??) landed as
https://crrev.com/be32c055f19d68c418148dd75a2fe8b8da9c1f61
Cr-Commit-Position: refs/heads/master@{#37361}