[turbofan] Add support for (deferred) instance migration.

[turbofan] Add support for (deferred) instance migration.

Fix a deoptimization loop in TurboFan, where we'd constantly fail the
same map check due to not trying instance migration, when there are
migration targets in the map check list. This deoptimization loop
showed up on the React test in Speedometer.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2621423006
Cr-Commit-Position: refs/heads/master@{#42323}
Committed: https://chromium.googlesource.com/v8/v8/+/1ff4a8178e48becd54441a9a04ccea79e3074ed3

[Benedikt Meurer, 2017-01-13 10:53:12]

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

[commit-bot: I haz the power, 2017-01-13 10:53:18]

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, 2017-01-13 11:44:28]

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

[commit-bot: I haz the power, 2017-01-13 11:44:29]

Dry run: This issue passed the CQ dry run.

[Jarin, 2017-01-13 12:05:38]

lgtm

https://codereview.chromium.org/2621423006/diff/1/src/compiler/effect-control...
File src/compiler/effect-control-linearizer.cc (right):

https://codereview.chromium.org/2621423006/diff/1/src/compiler/effect-control...
src/compiler/effect-control-linearizer.cc:1076: __ GotoUnless(check, &migrate);
__ Branch(check, &done, &migrate);

[Benedikt Meurer, 2017-01-13 12:08:10]

https://codereview.chromium.org/2621423006/diff/1/src/compiler/effect-control...
File src/compiler/effect-control-linearizer.cc (right):

https://codereview.chromium.org/2621423006/diff/1/src/compiler/effect-control...
src/compiler/effect-control-linearizer.cc:1076: __ GotoUnless(check, &migrate);
Doesn't work with the current template magic, will stick to this instead.

[Benedikt Meurer, 2017-01-13 12:08:14]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2017-01-13 12:08:19]

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, 2017-01-13 12:09:53]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484309294931860, "parent_rev":
"124fbe55ecb3bfdcd9624f4dc28baf77d31fa6b5", "commit_rev":
"1ff4a8178e48becd54441a9a04ccea79e3074ed3"}

[commit-bot: I haz the power, 2017-01-13 12:09:56]

Description was changed from

==========
[turbofan] Add support for (deferred) instance migration.

Fix a deoptimization loop in TurboFan, where we'd constantly fail the
same map check due to not trying instance migration, when there are
migration targets in the map check list. This deoptimization loop
showed up on the React test in Speedometer.

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

to

==========
[turbofan] Add support for (deferred) instance migration.

Fix a deoptimization loop in TurboFan, where we'd constantly fail the
same map check due to not trying instance migration, when there are
migration targets in the map check list. This deoptimization loop
showed up on the React test in Speedometer.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2621423006
Cr-Commit-Position: refs/heads/master@{#42323}
Committed:
https://chromium.googlesource.com/v8/v8/+/1ff4a8178e48becd54441a9a04ccea79e30...
==========

[commit-bot: I haz the power, 2017-01-13 12:09:57]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/1ff4a8178e48becd54441a9a04ccea79e30...