[turbofan] Fix FinishRegion handling in NodeProperties::InferReceiverMaps.

[turbofan] Fix FinishRegion handling in NodeProperties::InferReceiverMaps.

When looking for receiver maps, we need to account for the renaming
performed by FinishRegion, and look for the original receiver instead
from that point on.

Drive-by-fix: Abort effect chain walk as soon as the definition of the
receiver is seen on the effect chain.

BUG=v8:5267
Review-Url: https://codereview.chromium.org/2836853002
Cr-Commit-Position: refs/heads/master@{#44833}
Committed: https://chromium.googlesource.com/v8/v8/+/904e5df567844939a065f558ea338cbdc05eb2cd

[Benedikt Meurer, 2017-04-24 05:53:27]

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

[commit-bot: I haz the power, 2017-04-24 05:53:34]

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, 2017-04-24 06:15:58]

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

[commit-bot: I haz the power, 2017-04-24 06:15:59]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2017-04-24 07:43:33]

bmeurer@chromium.org changed reviewers:
+ jarin@chromium.org

[Benedikt Meurer, 2017-04-24 07:43:34]

Hey Jaro,

Here's a fix for the receiver maps inferrer.
Please take a look.

Thanks,
Benedikt

[Jarin, 2017-04-25 08:21:42]

lgtm

[Benedikt Meurer, 2017-04-25 08:29:52]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2017-04-25 08:30:04]

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, 2017-04-25 08:54:22]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493108992102250, "parent_rev":
"e34a9964bb27472af448e7677da05f6091e9995c", "commit_rev":
"904e5df567844939a065f558ea338cbdc05eb2cd"}

[commit-bot: I haz the power, 2017-04-25 08:54:27]

Description was changed from

==========
[turbofan] Fix FinishRegion handling in NodeProperties::InferReceiverMaps.

When looking for receiver maps, we need to account for the renaming
performed by FinishRegion, and look for the original receiver instead
from that point on.

Drive-by-fix: Abort effect chain walk as soon as the definition of the
receiver is seen on the effect chain.

BUG=v8:5267
==========

to

==========
[turbofan] Fix FinishRegion handling in NodeProperties::InferReceiverMaps.

When looking for receiver maps, we need to account for the renaming
performed by FinishRegion, and look for the original receiver instead
from that point on.

Drive-by-fix: Abort effect chain walk as soon as the definition of the
receiver is seen on the effect chain.

BUG=v8:5267

Review-Url: https://codereview.chromium.org/2836853002
Cr-Commit-Position: refs/heads/master@{#44833}
Committed:
https://chromium.googlesource.com/v8/v8/+/904e5df567844939a065f558ea338cbdc05...
==========

[commit-bot: I haz the power, 2017-04-25 08:54:28]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/904e5df567844939a065f558ea338cbdc05...