re PR tree-optimization/91291 (gcc.dg/20020312-2.c FAILs)

2019-07-30  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91291
	* tree-ssa-sccvn.c (rpo_elim::eliminate_push_avail): Ignore
	constant values.

From-SVN: r273903

gcc/ChangeLog

+2019-07-30  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/91291
+	* tree-ssa-sccvn.c (rpo_elim::eliminate_push_avail): Ignore
+	constant values.
+
 2019-07-30  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/91216

gcc/tree-ssa-sccvn.c

@@ -6253,7 +6253,8 @@ void
 rpo_elim::eliminate_push_avail (basic_block bb, tree leader)
 {
   tree valnum = VN_INFO (leader)->valnum;
-  if (valnum == VN_TOP)
+  if (valnum == VN_TOP
+      || is_gimple_min_invariant (valnum))
     return;
   if (dump_file && (dump_flags & TDF_DETAILS))
     {