[turbofan] Move native context specialization before inlining.

[turbofan] Move native context specialization before inlining.

Perform native context specialization immediately after graph
construction (also after inlinee graph construction). This way
we can do unified inlining before we go to typing and typed
lowering. And we will get better typing due to constants and
(checked) type feedback.

R=mstarzinger@chromium.org
BUG=v8:4470
LOG=n

Committed: https://crrev.com/d702f70795a0be3aa219153af6769474ee823290
Cr-Commit-Position: refs/heads/master@{#31255}

[Benedikt Meurer, 2015-10-14 11:23:34]

bmeurer@chromium.org changed reviewers:
+ mstarzinger@chromium.org

[Benedikt Meurer, 2015-10-14 11:23:55]

Hey Michi,

As discussed offline.
Please take a look.

Thanks,
Benedikt

[Michael Starzinger, 2015-10-14 11:28:57]

LGTM with one comment to address.

https://codereview.chromium.org/1404123002/diff/1/src/compiler/js-inlining.cc
File src/compiler/js-inlining.cc (right):

https://codereview.chromium.org/1404123002/diff/1/src/compiler/js-inlining.cc...
src/compiler/js-inlining.cc:267: : GraphReducer(zone, jsgraph->graph(),
jsgraph->Dead()) {}
As discussed offline: Let's use the GraphReducer directly bellow and not add
this helper class here.

[Benedikt Meurer, 2015-10-14 11:29:13]

https://codereview.chromium.org/1404123002/diff/1/src/compiler/js-inlining.cc
File src/compiler/js-inlining.cc (right):

https://codereview.chromium.org/1404123002/diff/1/src/compiler/js-inlining.cc...
src/compiler/js-inlining.cc:267: : GraphReducer(zone, jsgraph->graph(),
jsgraph->Dead()) {}
On 2015/10/14 11:28:57, Michael Starzinger wrote:
> As discussed offline: Let's use the GraphReducer directly bellow and not add
> this helper class here.

Done.

[Benedikt Meurer, 2015-10-14 11:29:17]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-10-14 11:29:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1404123002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1404123002/20001

[commit-bot: I haz the power, 2015-10-14 12:20:45]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-10-14 12:21:09]

Patchset 2 (id:??) landed as
https://crrev.com/d702f70795a0be3aa219153af6769474ee823290
Cr-Commit-Position: refs/heads/master@{#31255}