Ensure there is a smi check of the receiver for global load and call ICs.

Ensure there is a smi check of the receiver for global load and call ICs.

There was a comment that, for such ICs specialized to the global object,
they were always contextual loads.  This is very brittle.  It is a
micro-optimization that relies too much on the way that things happen to
work today.

Instead, never omit the smi check because it's safer.

R=vegorov@chromium.org
BUG=117794
TEST=regress-117794.js

Committed: https://code.google.com/p/v8/source/detail?r=11022

[Vyacheslav Egorov (Chromium), 2012-03-13 11:37:09]

lgtm