[csa] Add Unreachable() and use it after throw sites

[csa] Add Unreachable() and use it after throw sites

This should improve readability, code generation, and ensure that
we verify such locations are never reached.

BUG=

Review-Url: https://codereview.chromium.org/2705163005
Cr-Commit-Position: refs/heads/master@{#43367}
Committed: https://chromium.googlesource.com/v8/v8/+/c7add4ce57d6424569a146aef9d04682cb40fc1c

[jgruber, 2017-02-22 10:31:34]

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

[commit-bot: I haz the power, 2017-02-22 10:31:37]

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, 2017-02-22 10:38:40]

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

[commit-bot: I haz the power, 2017-02-22 10:38:40]

Dry run: Try jobs failed on following builders:
  v8_linux_chromium_gn_rel on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_chromium_gn_rel/bu...)

[jgruber, 2017-02-22 10:49:59]

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

[commit-bot: I haz the power, 2017-02-22 10:50:11]

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, 2017-02-22 11:19:46]

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

[commit-bot: I haz the power, 2017-02-22 11:19:47]

Dry run: This issue passed the CQ dry run.

[jgruber, 2017-02-22 11:29:54]

jgruber@chromium.org changed reviewers:
+ ishell@chromium.org, mstarzinger@chromium.org

[jgruber, 2017-02-22 11:29:54]

Hi guys, this adds Unreachable to CodeAssembler/RawMachineAssembler and then
uses it after throwing runtime calls. PTAL.

[Michael Starzinger, 2017-02-22 11:56:25]

LGTM. Thanks!

[jgruber, 2017-02-22 12:00:46]

The CQ bit was checked by jgruber@chromium.org

[commit-bot: I haz the power, 2017-02-22 12:00:51]

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, 2017-02-22 12:02:35]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1487764846577570,
"parent_rev": "73d45c9630f4e7561d5c6155cae97bb43dffaa54", "commit_rev":
"c7add4ce57d6424569a146aef9d04682cb40fc1c"}

[commit-bot: I haz the power, 2017-02-22 12:02:39]

Description was changed from

==========
[csa] Add Unreachable() and use it after throw sites

This should improve readability, code generation, and ensure that
we verify such locations are never reached.

BUG=
==========

to

==========
[csa] Add Unreachable() and use it after throw sites

This should improve readability, code generation, and ensure that
we verify such locations are never reached.

BUG=

Review-Url: https://codereview.chromium.org/2705163005
Cr-Commit-Position: refs/heads/master@{#43367}
Committed:
https://chromium.googlesource.com/v8/v8/+/c7add4ce57d6424569a146aef9d04682cb4...
==========

[commit-bot: I haz the power, 2017-02-22 12:02:41]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/c7add4ce57d6424569a146aef9d04682cb4...