X87: Reland VectorICs: ia32 store ics need a virtual register.

X87: Reland VectorICs: ia32 store ics need a virtual register.

port 1e00bb57a2969e3e428a1d552116752a95c06022 (r30737).

original commit message:

    (reason for revert/reland: patch incorrectly left --vector-stores flag
     on, helpfully revealing some gcstress issues to look at, but they
     don't need to block this CL).

    Some pretty hacky code was used to carry out the tail-call
    handler dispatch on ia32 vector stores due to a lack
    of free registers. It really tanks performance. A better
    approach is to use a virtual register on the isolate.

BUG=

Committed: https://crrev.com/ecc6e6c52c75a388fa9de13377365b9ce4a7d29a
Cr-Commit-Position: refs/heads/master@{#30781}

[chunyang.dai, 2015-09-16 09:00:48]

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

[chunyang.dai, 2015-09-16 09:00:48]

ptal

[Weiliang, 2015-09-17 00:34:28]

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

[Weiliang, 2015-09-17 00:34:29]

lgtm

[commit-bot: I haz the power, 2015-09-17 00:34:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1344383002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1344383002/1

[commit-bot: I haz the power, 2015-09-17 01:25:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-17 01:25:44]

Patchset 1 (id:??) landed as
https://crrev.com/ecc6e6c52c75a388fa9de13377365b9ce4a7d29a
Cr-Commit-Position: refs/heads/master@{#30781}