[Crankshaft] ia32/x64: Fix environment handling for LMulI

[Crankshaft] ia32/x64: Fix environment handling for LMulI

This is the ia32/x64 version of https://codereview.chromium.org/873703002,
which fixed the same problem on arm/arm64.

BUG=chromium:553441
LOG=n
R=yangguo@chromium.org

Committed: https://crrev.com/2dde677feb0b756eff077ca29744024242834c56
Cr-Commit-Position: refs/heads/master@{#33386}

[Jakob Kummerow, 2016-01-19 13:37:06]

PTAL.

Unfortunately I can't check in the regression test because when it doesn't crash
(after this fix) it's an endless loop, and considering that Crankshaft is
deprecated and the issue is harmless, it's not worth the effort to find a better
repro. For reference, here it is:

function Cb(a) {
  var f, g;
  for(var g = 1; g < 1/0; g *= 2) {
    g = a.charCodeAt(f);
  }
  return g;
}
var s1 = "abc";
Cb(s1);

[Yang, 2016-01-19 14:16:11]

On 2016/01/19 13:37:06, Jakob wrote:
> PTAL.
> 
> Unfortunately I can't check in the regression test because when it doesn't
crash
> (after this fix) it's an endless loop, and considering that Crankshaft is
> deprecated and the issue is harmless, it's not worth the effort to find a
better
> repro. For reference, here it is:
> 
> function Cb(a) {
>   var f, g;
>   for(var g = 1; g < 1/0; g *= 2) {
>     g = a.charCodeAt(f);
>   }
>   return g;
> }
> var s1 = "abc";
> Cb(s1);

lgtm.

[Jakob Kummerow, 2016-01-19 14:18:12]

The CQ bit was checked by jkummerow@chromium.org

[commit-bot: I haz the power, 2016-01-19 14:18:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1604913002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1604913002/1

[commit-bot: I haz the power, 2016-01-19 14:40:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-19 14:40:59]

Description was changed from

==========
[Crankshaft] ia32/x64: Fix environment handling for LMulI

This is the ia32/x64 version of https://codereview.chromium.org/873703002,
which fixed the same problem on arm/arm64.

BUG=chromium:553441
LOG=n
R=yangguo@chromium.org
==========

to

==========
[Crankshaft] ia32/x64: Fix environment handling for LMulI

This is the ia32/x64 version of https://codereview.chromium.org/873703002,
which fixed the same problem on arm/arm64.

BUG=chromium:553441
LOG=n
R=yangguo@chromium.org

Committed: https://crrev.com/2dde677feb0b756eff077ca29744024242834c56
Cr-Commit-Position: refs/heads/master@{#33386}
==========

[commit-bot: I haz the power, 2016-01-19 14:41:00]

Patchset 1 (id:??) landed as
https://crrev.com/2dde677feb0b756eff077ca29744024242834c56
Cr-Commit-Position: refs/heads/master@{#33386}