an outedge debug helper

[r15743]

ir/debug/debugger.c

@@ -62,6 +62,7 @@
 #include "entity_t.h"
 #include "irprintf.h"
 #include "irdump.h"
+#include "iredges_t.h"
 #include "debug.h"
 
 #ifdef _WIN32
@@ -1312,6 +1313,24 @@ const char *gdb_tarval_helper(void *tv_object) {
 	return buf;
 }
 
+const char *gdb_out_edge_helper(const ir_node *node) {
+	static char buf[4*1024];
+	char *b = buf;
+	size_t l;
+	size_t len = sizeof(buf);
+	const ir_edge_t *edge;
+	foreach_out_edge(node, edge) {
+		ir_node *n = get_edge_src_irn(edge);
+
+		ir_snprintf(b, len, "%+F  ", n);
+		l = strlen(b);
+		len -= l;
+		b += l;
+	}
+
+	return buf;
+}
+
 #else
 
 /* some picky compiler do not allow empty files */