re PR bootstrap/50825 (bootstrap fails at stage1 libgcc from r180302)

	PR bootstrap/50825
	* sched-deps.c (add_dependence): If not doing predication, promote
	REG_DEP_CONTROL to REG_DEP_ANTI.

From-SVN: r180310

gcc/ChangeLog

+2011-10-21  Bernd Schmidt  <bernds@codesourcery.com>
+
+	PR bootstrap/50825
+	* sched-deps.c (add_dependence): If not doing predication, promote
+	REG_DEP_CONTROL to REG_DEP_ANTI.
+
 2011-10-21  Georg-Johann Lay  <avr@gjlay.de>
 
 	* config/avr/avr.h (LEGITIMIZE_RELOAD_ADDRESS): Pass address of X

gcc/sched-deps.c

@@ -1505,6 +1505,10 @@ sd_debug_lists (rtx insn, sd_list_types_def types)
 void
 add_dependence (rtx con, rtx pro, enum reg_note dep_type)
 {
+  if (dep_type == REG_DEP_CONTROL
+      && !(current_sched_info->flags & DO_PREDICATION))
+    dep_type = REG_DEP_ANTI;
+
   /* A REG_DEP_CONTROL dependence may be eliminated through predication,
      so we must also make the insn dependent on the setter of the
      condition.  */