I just tried to compile the package scsires-0.7-4.7 with the GNU C compiler version 4.5 snapshot 20100128 and the compiler said
scsires.c: In function 'scsires_issue_reservation': scsires.c:911:1: error: type mismatch in shift expression vector unsigned int vector <unnamed type> int vect_var_.289_442 = vect_perm_odd.250_390 >> 16; then scsires.c:911:1: internal compiler error: verify_stmts failed Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Preprocessed source code attached. Flag -O3 required. It compiles fine with -O2. -- Summary: type mismatch in shift expression produces ice with -O3 Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dcb314 at hotmail dot com GCC host triplet: x86_64-suse-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42927