clarify some node comments

[libfirm] / ir / opt / opt_confirms.c

diff --git a/ir/opt/opt_confirms.c b/ir/opt/opt_confirms.c
index 611ee19..99c6183 100644 (file)
--- a/ir/opt/opt_confirms.c
+++ b/ir/opt/opt_confirms.c
@@ -167,9 +167,7 @@ FIRM_API int value_not_zero(const ir_node *n, ir_node_cnst_ptr *confirm)
 /*
  * Check, if the value of a node cannot represent a NULL pointer.
  *
- * - Casts are skipped
- * - If sel_based_null_check_elim is enabled, all
- *   Sel nodes can be skipped.
+ * - Casts are skipped, Sels are skipped
  * - A SymConst(entity) is NEVER a NULL pointer
  * - Confirms are evaluated
  */
@@ -185,11 +183,9 @@ FIRM_API int value_not_null(const ir_node *n, ir_node_cnst_ptr *confirm)
                return 1;
 
        assert(mode_is_reference(get_irn_mode(n)));
-       if (get_opt_sel_based_null_check_elim()) {
-               /* skip all Sel nodes and Cast's */
-               while (is_Sel(n)) {
-                       n = skip_Cast(get_Sel_ptr(n));
-               }
+       /* skip all Sel nodes and Cast's */
+       while (is_Sel(n)) {
+               n = skip_Cast(get_Sel_ptr(n));
        }
        while (1) {
                if (is_Cast(n)) { n = get_Cast_op(n); continue; }