[turbofan] Infer receiver maps from earlier map checks.

[turbofan] Infer receiver maps from earlier map checks.

When trying to infer receiver maps for property accesses, go hunting in
the effect chain to find an earlier CheckMaps or StoreField for the
receiver.

BUG=v8:5267
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2704563005
Cr-Commit-Position: refs/heads/master@{#43274}
Committed: https://chromium.googlesource.com/v8/v8/+/4b07a97978b9392eae52d397447d51725dd9d912

[Benedikt Meurer, 2017-02-17 10:08:57]

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

[commit-bot: I haz the power, 2017-02-17 10:09:00]

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

[Jarin, 2017-02-17 10:11:16]

lgtm

lgtm. Thanks!

[commit-bot: I haz the power, 2017-02-17 10:32:10]

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

[commit-bot: I haz the power, 2017-02-17 10:32:11]

Dry run: This issue passed the CQ dry run.

[Jarin, 2017-02-17 10:46:55]

The CQ bit was checked by jarin@chromium.org

[commit-bot: I haz the power, 2017-02-17 10:46:57]

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, 2017-02-17 10:48:33]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487328415142080, "parent_rev":
"3503ddf0dbd7d0fde050400a90c9434f030f2d4b", "commit_rev":
"4b07a97978b9392eae52d397447d51725dd9d912"}

[commit-bot: I haz the power, 2017-02-17 10:48:37]

Description was changed from

==========
[turbofan] Infer receiver maps from earlier map checks.

When trying to infer receiver maps for property accesses, go hunting in
the effect chain to find an earlier CheckMaps or StoreField for the
receiver.

BUG=v8:5267
R=jarin@chromium.org
==========

to

==========
[turbofan] Infer receiver maps from earlier map checks.

When trying to infer receiver maps for property accesses, go hunting in
the effect chain to find an earlier CheckMaps or StoreField for the
receiver.

BUG=v8:5267
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2704563005
Cr-Commit-Position: refs/heads/master@{#43274}
Committed:
https://chromium.googlesource.com/v8/v8/+/4b07a97978b9392eae52d397447d51725dd...
==========

[commit-bot: I haz the power, 2017-02-17 10:48:37]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/4b07a97978b9392eae52d397447d51725dd...