Index: gcc/ifcvt.c
===================================================================
--- gcc/ifcvt.c	(revision 229049)
+++ gcc/ifcvt.c	(working copy)
@@ -2868,11 +2868,12 @@ noce_mem_write_may_trap_or_fault_p (cons
 	  return false;
 	break;
       case LABEL_REF:
-	return true;
+	gcc_unreachable ();
       case SYMBOL_REF:
 	if (SYMBOL_REF_DECL (addr)
 	    && decl_readonly_section (SYMBOL_REF_DECL (addr), 0))
-	  return true;
+	  gcc_unreachable ();
+
 	return false;
       default:
 	return false;