added function to get a user Proj with a certain proj num from a mode_T node

ir/be/beutil.c

@@ -20,6 +20,7 @@
 #include "irgopt.h"
 #include "irtools.h"
 #include "irprintf.h"
+#include "iredges.h"
 
 #include "beutil.h"
 #include "besched_t.h"
@@ -225,3 +226,21 @@ ir_node *dom_up_search(pset *accept, ir_node *start_point_exclusive) {
 	else
 		return NULL; /* this was the start block and we did not find an acceptable irn */
 }
+
+/**
+ * Gets the Proj with number pn from irn.
+ */
+ir_node *be_get_Proj_for_pn(const ir_node *irn, long pn) {
+	const ir_edge_t *edge;
+	ir_node         *proj;
+	assert(get_irn_mode(irn) == mode_T && "need mode_T");
+
+	foreach_out_edge(irn, edge) {
+		proj = get_edge_src_irn(edge);
+
+		if (get_Proj_proj(proj) == pn)
+			return proj;
+	}
+
+	return NULL;
+}

ir/be/beutil.h

@@ -132,4 +132,9 @@ void be_kill_node(ir_node *irn);
  */
 ir_node *dom_up_search(pset *accept, ir_node *start_point_exclusive);
 
+/**
+ * Gets the Proj with number pn from irn.
+ */
+ir_node *be_get_Proj_for_pn(const ir_node *irn, long pn);
+
 #endif /* _BEUTIL_H */