Simplify PRE fix

The following reverts a part of the PR103037 fix which is no longer necessary
after the fix for PR104700.  That makes the possible cummulative backport
smaller.

2022-02-28  Richard Biener  <rguenther@suse.de>

	* tree-ssa-pre.cc (compute_avail): Revert part of last change.

diff --git a/gcc/tree-ssa-pre.cc b/gcc/tree-ssa-pre.cc
index ca034ff..47d70c8 100644 (file)
--- a/gcc/tree-ssa-pre.cc
+++ b/gcc/tree-ssa-pre.cc
@@ -3993,14 +3993,7 @@ compute_avail (function *fun)
          FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_DEF)
            {
              pre_expr e = get_or_alloc_expr_for_name (op);
-             unsigned value_id = get_expr_value_id (e);
-             if (value_id_constant_p (value_id))
-               {
-                 get_or_alloc_expr_for_constant (VN_INFO (op)->valnum);
-                 continue;
-               }
-
-             add_to_value (value_id, e);
+             add_to_value (get_expr_value_id (e), e);
              bitmap_insert_into_set (TMP_GEN (block), e);
              bitmap_value_insert_into_set (AVAIL_OUT (block), e);
            }