[turbofan] MemoryOptimizer cannot deal with dead nodes in use lists.

[turbofan] MemoryOptimizer cannot deal with dead nodes in use lists.

We need to trim the graph before we execute the MemoryOptimizer, because
that just walks the effect chain from Start to End and cannot deal with
dead nodes in the use lists.

R=jarin@chromium.org
BUG=chromium:614292
Committed: https://crrev.com/5e0cd389bff2833c0b13179977b11ec216330bb3
Cr-Commit-Position: refs/heads/master@{#37133}

[Benedikt Meurer, 2016-06-21 07:57:25]

Hey Jaro,

Moar trimming, yay!
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-06-21 09:01:36]

lgtm :-/

[Benedikt Meurer, 2016-06-21 09:50:05]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-06-21 09:50:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2080703003/1

[commit-bot: I haz the power, 2016-06-21 10:39:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-21 10:40:57]

Description was changed from

==========
[turbofan] MemoryOptimizer cannot deal with dead nodes in use lists.

We need to trim the graph before we execute the MemoryOptimizer, because
that just walks the effect chain from Start to End and cannot deal with
dead nodes in the use lists.

R=jarin@chromium.org
BUG=chromium:614292
==========

to

==========
[turbofan] MemoryOptimizer cannot deal with dead nodes in use lists.

We need to trim the graph before we execute the MemoryOptimizer, because
that just walks the effect chain from Start to End and cannot deal with
dead nodes in the use lists.

R=jarin@chromium.org
BUG=chromium:614292

Committed: https://crrev.com/5e0cd389bff2833c0b13179977b11ec216330bb3
Cr-Commit-Position: refs/heads/master@{#37133}
==========

[commit-bot: I haz the power, 2016-06-21 10:40:58]

Patchset 1 (id:??) landed as
https://crrev.com/5e0cd389bff2833c0b13179977b11ec216330bb3
Cr-Commit-Position: refs/heads/master@{#37133}