These two functions should be the same at the tree level but are not: int f(int a, int b) { return (a^b)^a; } int f1(int a, int b) { return b; }
--- Another one from LLVM. -- Summary: Fold does not fold (a^b)^a to b Product: gcc Version: 4.1.0 Status: UNCONFIRMED Keywords: missed-optimization, TREE Severity: enhancement Priority: P2 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org OtherBugsDependingO 19986 nThis: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23672