Merge r8803 from the bleeding edge to 3.3 branch.

Merge r8803 from the bleeding edge to 3.3 branch.

Check phi uses of the arguments object after redundant phies elimination.

This allows to handle code like:

var a = arguments;
while (smth) a[i];

without bailout.
Committed: http://code.google.com/p/v8/source/detail?r=8806