[Bug target/46208] redundant extensions of argument registers

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46208

--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2010-10-28 
11:02:59 UTC ---
Created attachment 22188
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22188
Minimal patch