+
+
+/* Returns the obstack associated with the graph. */
+struct obstack *get_irg_obstack(ir_graph *irg) {
+ return irg->obst;
+}
+
+/*
+ * Returns true if the node n is allocated on the storage of graph irg.
+ *
+ * Implementation is GLIBC specific as is uses the internal _obstack_chunk implementation.
+ */
+int node_is_in_irgs_storage(ir_graph *irg, ir_node *n)
+{
+ struct _obstack_chunk *p;
+
+ /*
+ * checks wheater the ir_node pointer i on the obstack.
+ * A more sophisticated chaeck would test the "whole" ir_node
+ */
+ for (p = irg->obst->chunk; p; p = p->prev) {
+ if (((char *)p->contents <= (char *)n) && ((char *)n < (char *)p->limit))
+ return 1;
+ }
+
+ return 0;
+}
+