[turbofan] Initial support for monomorphic/polymorphic property stores.

[turbofan] Initial support for monomorphic/polymorphic property stores.

This slightly generalizes the current mechnanism for property loads to
also deal with property stores (both monomorphic and polymorphic). It's
still somewhat adhoc, but it already handles a lot of the interesting
cases. We might want to wait for keyed accesses before we start
refactoring to a more general solution.

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

Committed: https://crrev.com/74b414675765adb2d7f5dba4b5fff24976976a7f
Cr-Commit-Position: refs/heads/master@{#31475}

[Benedikt Meurer, 2015-10-21 13:42:45]

Hey Jaro,

As discussed offline, here's the patch without refactoring.
Please take a look.

Thanks,
Benedikt

[Jarin, 2015-10-22 09:27:30]

lgtm. (sigh.)

https://codereview.chromium.org/1422573002/diff/1/src/compiler/js-native-cont...
File src/compiler/js-native-context-specialization.cc (right):

https://codereview.chromium.org/1422573002/diff/1/src/compiler/js-native-cont...
src/compiler/js-native-context-specialization.cc:820: // common code once we
also have support for stores.
Update comment.

https://codereview.chromium.org/1422573002/diff/1/src/compiler/js-native-cont...
src/compiler/js-native-context-specialization.cc:855: check =
How about not reusing the variable here and naming it "Node* map_check =" here
(or some such)?

[Benedikt Meurer, 2015-10-22 11:38:40]

https://codereview.chromium.org/1422573002/diff/1/src/compiler/js-native-cont...
File src/compiler/js-native-context-specialization.cc (right):

https://codereview.chromium.org/1422573002/diff/1/src/compiler/js-native-cont...
src/compiler/js-native-context-specialization.cc:820: // common code once we
also have support for stores.
On 2015/10/22 09:27:30, Jarin wrote:
> Update comment.

Done.

[Benedikt Meurer, 2015-10-22 13:21:59]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-10-22 13:22:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1422573002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1422573002/1

[commit-bot: I haz the power, 2015-10-22 13:23:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-22 13:23:53]

Patchset 1 (id:??) landed as
https://crrev.com/74b414675765adb2d7f5dba4b5fff24976976a7f
Cr-Commit-Position: refs/heads/master@{#31475}