http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47890
Summary: [4.5/4.6 Regression] internal compiler error: in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:1186 Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassig...@gcc.gnu.org ReportedBy: d.g.gorbac...@gmail.com Created attachment 23462 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23462 Backtrace $ cat > bug.c void f(char *s) { signed short i; for (i = 0; i < 19; i = i + 1) s[i] = i; } ^D $ gcc -O3 -march=pentium4 bug.c