Correct documentation of return value.

[libfirm] / ir / opt / opt_frame.c

diff --git a/ir/opt/opt_frame.c b/ir/opt/opt_frame.c
index 1212540..b985540 100644 (file)
--- a/ir/opt/opt_frame.c
+++ b/ir/opt/opt_frame.c
@@ -64,8 +64,10 @@ void opt_frame_irg(ir_graph *irg) {
                /* mark all used entities */
                foreach_out_edge(frame, edge) {
                        sel = get_edge_src_irn(edge);
-                       ent = get_Sel_entity(sel);
-                       set_entity_link(ent, ent);
+                       if (is_Sel(sel)) {
+                               ent = get_Sel_entity(sel);
+                               set_entity_link(ent, ent);
+                       }
                }
        } else {
                /* use traditionally out edges */
@@ -74,8 +76,10 @@ void opt_frame_irg(ir_graph *irg) {
                /* mark all used entities */
                for (i = get_irn_n_outs(frame) - 1; i >= 0; --i) {
                        sel = get_irn_out(frame, i);
-                       ent = get_Sel_entity(sel);
-                       set_entity_link(ent, ent);
+                       if (is_Sel(sel)) {
+                               ent = get_Sel_entity(sel);
+                               set_entity_link(ent, ent);
+                       }
                }
        }