fix backend/lower_call3.c

diff --git a/ir/lower/lower_calls.c b/ir/lower/lower_calls.c
index 14916bd..5036694 100644 (file)
--- a/ir/lower/lower_calls.c
+++ b/ir/lower/lower_calls.c
@@ -666,11 +666,6 @@ static void transform_irg(const lower_params_t *lp, ir_graph *irg)
        if (n_ret_com) {
                int idx;
 
-               /*
-                * Now fix the Return node of the current graph.
-                */
-               env.changed = 1;
-
                /* STEP 1: find the return. This is simple, we have normalized the graph. */
                endbl = get_irg_end_block(irg);
                ret = NULL;
@@ -682,8 +677,14 @@ static void transform_irg(const lower_params_t *lp, ir_graph *irg)
                                break;
                        }
                }
-               /* there should always be a return */
-               assert(ret);
+
+               /* in case of infinite loops, there might be no return */
+               if (ret == NULL) goto return_fixed;
+
+               /*
+                * Now fix the Return node of the current graph.
+                */
+               env.changed = 1;
 
                /*
                 * STEP 2: fix it. For all compound return values add a CopyB,
@@ -756,6 +757,7 @@ static void transform_irg(const lower_params_t *lp, ir_graph *irg)
                        }
                }
        } /* if (n_ret_com) */
+return_fixed:
 
        pmap_destroy(env.dummy_map);
        obstack_free(&env.obst, NULL);