https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65518
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2015-03-23 Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org Ever confirmed|0 |1 Known to fail| |5.0 --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed. else { for (i = 0; i < vec_num; i++) { and vec_num is 268435456 (after some time) ... looks uninitialized to me. (gdb) p group_size $21 = 268435456 for some reason we detect a grouped load with a single load and group size 268435456: t.c:9:3: note: === vect_analyze_data_ref_accesses === t.c:9:3: note: Detected single element interleaving _6->g[0] step 2147483648 t.c:9:3: note: Data access with gaps requires scalar epilogue loop