[Bug middle-end/47893] [4.6 Regression] 4.6 miscompiles mesa on i686

[bernds at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47893

--- Comment #9 from Bernd Schmidt <bernds at gcc dot gnu.org> 2011-02-25 
17:25:13 UTC ---
Created attachment 23468
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23468
Test patch

Does this fix it?