[Bug target/41849] optimization fails when register variables are used for an interrupt

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41849

--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-25 
15:19:28 UTC ---
Created attachment 24828
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24828
C test case