[turbofan] Change End to take a variable number of inputs.

[turbofan] Change End to take a variable number of inputs.

This simplifies the handling of the End node. Based on this CL we will
finally fix terminating every loop from the beginning (via Terminate
nodes) and fix inlining of Throw, Deoptimize and Terminate.

R=mstarzinger@chromium.org

Committed: https://crrev.com/2b93b8aa4175e4fb12d93e09c59e12867d6b030c
Cr-Commit-Position: refs/heads/master@{#28620}

[Benedikt Meurer, 2015-05-26 09:29:59]

Hey Michi,

Make End nice. :-)
Please take a look.

Thanks,
Benedikt

[Michael Starzinger, 2015-05-26 10:28:05]

LGTM.

https://codereview.chromium.org/1157023002/diff/1/src/compiler/js-inlining.cc
File src/compiler/js-inlining.cc (right):

https://codereview.chromium.org/1157023002/diff/1/src/compiler/js-inlining.cc...
src/compiler/js-inlining.cc:189: jsgraph_->common()->Merge(input_count),
input_count, &controls.front());
This will create a singleton Merge as well as singleton Phi and EffectPhi nodes
in case values.size == 1, is this working as intended?

[Benedikt Meurer, 2015-05-26 10:29:31]

https://codereview.chromium.org/1157023002/diff/1/src/compiler/js-inlining.cc
File src/compiler/js-inlining.cc (right):

https://codereview.chromium.org/1157023002/diff/1/src/compiler/js-inlining.cc...
src/compiler/js-inlining.cc:189: jsgraph_->common()->Merge(input_count),
input_count, &controls.front());
Yes. My plan is to optimize this away later. For now it's ok since the control
reducer will take care of those immediately.

[Benedikt Meurer, 2015-05-26 10:29:38]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-05-26 10:29:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1157023002/1

[commit-bot: I haz the power, 2015-05-26 10:32:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-26 10:32:23]

Patchset 1 (id:??) landed as
https://crrev.com/2b93b8aa4175e4fb12d93e09c59e12867d6b030c
Cr-Commit-Position: refs/heads/master@{#28620}