[turbofan] Fix impossible type handling for TypeGuard and BooleanNot.

[turbofan] Fix impossible type handling for TypeGuard and BooleanNot.

BUG=chromium:715204
Review-Url: https://codereview.chromium.org/2836203004
Cr-Commit-Position: refs/heads/master@{#44883}
Committed: https://chromium.googlesource.com/v8/v8/+/9c47a061cf325addf8bd2ba4b71a4d1ef210c5d6

[Jarin, 2017-04-26 09:53:35]

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

[commit-bot: I haz the power, 2017-04-26 09:53:43]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Jarin, 2017-04-26 09:54:03]

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

[Jarin, 2017-04-26 09:54:04]

Could you take a look, please?

[Benedikt Meurer, 2017-04-26 09:56:02]

lgtm

[commit-bot: I haz the power, 2017-04-26 10:17:48]

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

[commit-bot: I haz the power, 2017-04-26 10:17:49]

Dry run: This issue passed the CQ dry run.

[Jarin, 2017-04-26 10:25:52]

The CQ bit was checked by jarin@chromium.org

[commit-bot: I haz the power, 2017-04-26 10:25:58]

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, 2017-04-26 10:27:12]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493202352028960, "parent_rev":
"d185406a40a77c183112a75ffaf932811514c2e6", "commit_rev":
"9c47a061cf325addf8bd2ba4b71a4d1ef210c5d6"}

[commit-bot: I haz the power, 2017-04-26 10:27:18]

Description was changed from

==========
[turbofan] Fix impossible type handling for TypeGuard and BooleanNot.

BUG=chromium:715204
==========

to

==========
[turbofan] Fix impossible type handling for TypeGuard and BooleanNot.

BUG=chromium:715204

Review-Url: https://codereview.chromium.org/2836203004
Cr-Commit-Position: refs/heads/master@{#44883}
Committed:
https://chromium.googlesource.com/v8/v8/+/9c47a061cf325addf8bd2ba4b71a4d1ef21...
==========

[commit-bot: I haz the power, 2017-04-26 10:27:18]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/9c47a061cf325addf8bd2ba4b71a4d1ef21...

[jgruber, 2017-04-26 15:24:40]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2842793004/ by jgruber@chromium.org.

The reason for reverting is: Tentative revert for
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds....