[turbofan] Unify Smi checking for Check(Internalized)String.

[turbofan] Unify Smi checking for Check(Internalized)String.

Use the representation selector to insert appropriate Smi checks for
CheckString and CheckInternalizedString when necessary.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2637363002
Cr-Commit-Position: refs/heads/master@{#42434}
Committed: https://chromium.googlesource.com/v8/v8/+/ca20218ef2f35e7e1dedb2125b6b8cfbd6a1a3c7

[Benedikt Meurer, 2017-01-18 05:20:02]

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

[commit-bot: I haz the power, 2017-01-18 05:20:10]

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

[Benedikt Meurer, 2017-01-18 05:23:53]

Hey Jaro,

Here's some cleanup, which might also help performance in some cases.
Please take a look.

Thanks,
Benedikt

[commit-bot: I haz the power, 2017-01-18 05:44:49]

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

[commit-bot: I haz the power, 2017-01-18 05:44:49]

Dry run: This issue passed the CQ dry run.

[Jarin, 2017-01-18 07:03:47]

lgtm

[Benedikt Meurer, 2017-01-18 07:04:41]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2017-01-18 07:04:46]

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, 2017-01-18 07:06:23]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484723081336360, "parent_rev":
"2f0891977e0b7716a078ce8675be43c16dd9ad1c", "commit_rev":
"ca20218ef2f35e7e1dedb2125b6b8cfbd6a1a3c7"}

[commit-bot: I haz the power, 2017-01-18 07:06:30]

Description was changed from

==========
[turbofan] Unify Smi checking for Check(Internalized)String.

Use the representation selector to insert appropriate Smi checks for
CheckString and CheckInternalizedString when necessary.

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

to

==========
[turbofan] Unify Smi checking for Check(Internalized)String.

Use the representation selector to insert appropriate Smi checks for
CheckString and CheckInternalizedString when necessary.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2637363002
Cr-Commit-Position: refs/heads/master@{#42434}
Committed:
https://chromium.googlesource.com/v8/v8/+/ca20218ef2f35e7e1dedb2125b6b8cfbd6a...
==========

[commit-bot: I haz the power, 2017-01-18 07:06:31]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/ca20218ef2f35e7e1dedb2125b6b8cfbd6a...