PR target/39590

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-sccvn.c

diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index f3b00e9..b101aeb 100644 (file)
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -2886,7 +2886,8 @@ run_scc_vn (bool may_insert_arg)
       if (!name)
        continue;
       info = VN_INFO (name);
-      if (info->valnum == name)
+      if (info->valnum == name
+         || info->valnum == VN_TOP)
        info->value_id = get_next_value_id ();
       else if (is_gimple_min_invariant (info->valnum))
        info->value_id = get_or_alloc_constant_value_id (info->valnum);