[wasm] Break effect cycles in the Int64Lowering.

[wasm] Break effect cycles in the Int64Lowering.

EffectPhis can cause a cycle in a TurboFan graph. We delay the
processing of EffectPhis in the Int64Lowering to break these cycles. We
do the same already for Phis.

R=titzer@chromium.org
BUG=v8:5518
TEST=unittests/Int64LoweringTest.EffectPhiLoop

Committed: https://crrev.com/34fa66c08c2cbd62907d9f306709e8f9732c6a65
Cr-Commit-Position: refs/heads/master@{#40378}

[ahaas, 2016-10-17 14:37:17]

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

[commit-bot: I haz the power, 2016-10-17 14:37:19]

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

[titzer, 2016-10-17 14:40:13]

On 2016/10/17 14:37:15, ahaas wrote:

lgtm

[commit-bot: I haz the power, 2016-10-17 15:02:28]

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

[commit-bot: I haz the power, 2016-10-17 15:02:28]

Dry run: This issue passed the CQ dry run.

[ahaas, 2016-10-18 06:27:35]

The CQ bit was checked by ahaas@chromium.org

[commit-bot: I haz the power, 2016-10-18 06:27:46]

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, 2016-10-18 06:30:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-18 06:31:31]

Description was changed from

==========
[wasm] Break effect cycles in the Int64Lowering.

EffectPhis can cause a cycle in a TurboFan graph. We delay the
processing of EffectPhis in the Int64Lowering to break these cycles. We
do the same already for Phis.

R=titzer@chromium.org
BUG=v8:5518
TEST=unittests/Int64LoweringTest.EffectPhiLoop
==========

to

==========
[wasm] Break effect cycles in the Int64Lowering.

EffectPhis can cause a cycle in a TurboFan graph. We delay the
processing of EffectPhis in the Int64Lowering to break these cycles. We
do the same already for Phis.

R=titzer@chromium.org
BUG=v8:5518
TEST=unittests/Int64LoweringTest.EffectPhiLoop

Committed: https://crrev.com/34fa66c08c2cbd62907d9f306709e8f9732c6a65
Cr-Commit-Position: refs/heads/master@{#40378}
==========

[commit-bot: I haz the power, 2016-10-18 06:31:32]

Patchset 1 (id:??) landed as
https://crrev.com/34fa66c08c2cbd62907d9f306709e8f9732c6a65
Cr-Commit-Position: refs/heads/master@{#40378}