[turbofan] Relax index type constraints for StringCharAt/StringCharCodeAt.

[turbofan] Relax index type constraints for StringCharAt/StringCharCodeAt.

Also support inlining the builtins String.prototype.charCodeAt and
String.prototype.charAt if the index type is not statically known
to be in the Unsigned32 range, but in anything in Integral32 plus
minus zero and NaN.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2597913002
Cr-Commit-Position: refs/heads/master@{#41913}
Committed: https://chromium.googlesource.com/v8/v8/+/89259657b9d0953ce038a6411f414fd00a8c7a89

[Benedikt Meurer, 2016-12-22 06:57:46]

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

[commit-bot: I haz the power, 2016-12-22 06:57:49]

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, 2016-12-22 07:23:14]

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

[commit-bot: I haz the power, 2016-12-22 07:23:15]

Dry run: This issue passed the CQ dry run.

[Yang, 2016-12-22 07:34:12]

On 2016/12/22 06:57:42, Benedikt Meurer wrote:

lgtm.

[Yang, 2016-12-22 07:34:18]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2016-12-22 07:34:24]

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, 2016-12-22 07:35:57]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1482392058621350, "parent_rev":
"86e2a19991068c99f4340df87c9b4861e76023af", "commit_rev":
"89259657b9d0953ce038a6411f414fd00a8c7a89"}

[commit-bot: I haz the power, 2016-12-22 07:36:02]

Description was changed from

==========
[turbofan] Relax index type constraints for StringCharAt/StringCharCodeAt.

Also support inlining the builtins String.prototype.charCodeAt and
String.prototype.charAt if the index type is not statically known
to be in the Unsigned32 range, but in anything in Integral32 plus
minus zero and NaN.

R=yangguo@chromium.org
==========

to

==========
[turbofan] Relax index type constraints for StringCharAt/StringCharCodeAt.

Also support inlining the builtins String.prototype.charCodeAt and
String.prototype.charAt if the index type is not statically known
to be in the Unsigned32 range, but in anything in Integral32 plus
minus zero and NaN.

R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2597913002
Cr-Commit-Position: refs/heads/master@{#41913}
Committed:
https://chromium.googlesource.com/v8/v8/+/89259657b9d0953ce038a6411f414fd00a8...
==========

[commit-bot: I haz the power, 2016-12-22 07:36:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/89259657b9d0953ce038a6411f414fd00a8...