[Bug rtl-optimization/54456] [4.8 Regression] ICE: in init_seqno, at sel-sched.c:6797 with -fschedule-insns -fselective-scheduling

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54456

--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-09-02 
20:06:46 UTC ---
Any specialist of selective scheduling interested here?  Otherwise:

Index: sched-rgn.c
===================================================================
--- sched-rgn.c (revision 190863)
+++ sched-rgn.c (working copy)
@@ -3473,7 +3473,7 @@ static bool
 gate_handle_sched (void)
 {
 #ifdef INSN_SCHEDULING
-  return flag_schedule_insns && dbg_cnt (sched_func);
+  return optimize > 0 && flag_schedule_insns && dbg_cnt (sched_func);
 #else
   return 0;
 #endif

is certainly good enough and would eliminate this whole class of ICEs.