X87: [ic] Also collect known map for relational comparison.

X87: [ic] Also collect known map for relational comparison.

port e56f265f6d41fadbcea2be65d9b573bad8b4709d (r30852).

original commit message:

    Previously we only collected the known map for equality comparisons. But
    if we also collect it for relational comparisons, we can inline a fast
    path of ToPrimitive on the objects, which is especially interesting
    since both sides have the same map.

    For now we only inline a very limited subset of ToPrimitive in
    Crankshaft, which is when the receiver map (and its prototype chain)
    doesn't have @@toPrimitive, and both valueOf and toString are the
    default versions on the %ObjectPrototype%. In this case the relational
    comparison would reduce to a string comparison of "[object CLASS]" with
    itself and so we can reduce that to a boolean constant plus map checks
    on both left and right hand side, plus code dependencies on the
    prototype chain. This repairs the regression on box2d.

BUG=

Committed: https://crrev.com/687ef62eb5e78f3ac9dcde3ed70f6b7dddf680ef
Cr-Commit-Position: refs/heads/master@{#30897}

[chunyang.dai, 2015-09-23 06:22:32]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-09-23 06:22:32]

PTAL

[Weiliang, 2015-09-24 03:11:25]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-09-24 03:11:25]

lgtm

[commit-bot: I haz the power, 2015-09-24 03:11:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1342243005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1342243005/1

[commit-bot: I haz the power, 2015-09-24 03:34:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-24 03:35:17]

Patchset 1 (id:??) landed as
https://crrev.com/687ef62eb5e78f3ac9dcde3ed70f6b7dddf680ef
Cr-Commit-Position: refs/heads/master@{#30897}