[turbofan] Properly specialize JSCreateIterResultObject map.

[turbofan] Properly specialize JSCreateIterResultObject map.

If possible, take the constant map from the (known) native context for
JSCreateIterResultObject, so that subsequent map checks can be
eliminated in case of iterator inlining.

R=jarin@chromium.org
BUG=v8:3822
Committed: https://crrev.com/50c458a389d3f3878c72adc085f1e0caceb51ac6
Cr-Commit-Position: refs/heads/master@{#39974}

[Benedikt Meurer, 2016-10-05 05:33:40]

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

[commit-bot: I haz the power, 2016-10-05 05:33:45]

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

[Benedikt Meurer, 2016-10-05 05:36:05]

Hey Jaro,

A simple change to eliminate redundant map checks for the iterator results in
for-of and spread. Please take a look.

Thanks,
Benedikt

[Benedikt Meurer, 2016-10-05 05:37:16]

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

[commit-bot: I haz the power, 2016-10-05 05:37:18]

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

[Benedikt Meurer, 2016-10-05 05:37:29]

Patchset #1 (id:1) has been deleted

[Jarin, 2016-10-05 05:53:41]

lgtm

[Benedikt Meurer, 2016-10-05 05:53:56]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-10-05 05:53:59]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-10-05 05:54:06]

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, 2016-10-05 06:32:08]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2016-10-05 06:32:25]

Description was changed from

==========
[turbofan] Properly specialize JSCreateIterResultObject map.

If possible, take the constant map from the (known) native context for
JSCreateIterResultObject, so that subsequent map checks can be
eliminated in case of iterator inlining.

R=jarin@chromium.org
BUG=v8:3822
==========

to

==========
[turbofan] Properly specialize JSCreateIterResultObject map.

If possible, take the constant map from the (known) native context for
JSCreateIterResultObject, so that subsequent map checks can be
eliminated in case of iterator inlining.

R=jarin@chromium.org
BUG=v8:3822

Committed: https://crrev.com/50c458a389d3f3878c72adc085f1e0caceb51ac6
Cr-Commit-Position: refs/heads/master@{#39974}
==========

[commit-bot: I haz the power, 2016-10-05 06:32:26]

Patchset 1 (id:??) landed as
https://crrev.com/50c458a389d3f3878c72adc085f1e0caceb51ac6
Cr-Commit-Position: refs/heads/master@{#39974}