PPC/s390: [wasm] Trim graph before scheduling.

PPC/s390: [wasm] Trim graph before scheduling.

Port 990236825974e683640f9ca56ddd53e3e831a278

Original commit message:

    The scheduler expects a trimmed graph, so we have to trim the graph
    before scheduling.

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Committed: https://crrev.com/83e66947cc7be065fdd9979a61b708e43ba0ca5d
Cr-Commit-Position: refs/heads/master@{#40475}

[JaideepBajwa, 2016-10-20 12:49:09]

PTAL

[ahaas, 2016-10-20 13:45:38]

lgtm

[john.yan, 2016-10-20 13:54:10]

lgtm

[JaideepBajwa, 2016-10-20 13:54:55]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2016-10-20 13:55:01]

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, 2016-10-20 14:32:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-17 22:08:24]

Description was changed from

==========
PPC/s390: [wasm] Trim graph before scheduling.

Port 990236825974e683640f9ca56ddd53e3e831a278

Original commit message:

    The scheduler expects a trimmed graph, so we have to trim the graph
    before scheduling.

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N
==========

to

==========
PPC/s390: [wasm] Trim graph before scheduling.

Port 990236825974e683640f9ca56ddd53e3e831a278

Original commit message:

    The scheduler expects a trimmed graph, so we have to trim the graph
    before scheduling.

R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Committed: https://crrev.com/83e66947cc7be065fdd9979a61b708e43ba0ca5d
Cr-Commit-Position: refs/heads/master@{#40475}
==========

[commit-bot: I haz the power, 2016-11-17 22:08:25]

Patchset 1 (id:??) landed as
https://crrev.com/83e66947cc7be065fdd9979a61b708e43ba0ca5d
Cr-Commit-Position: refs/heads/master@{#40475}