#ifndef FIRM_IR_IROPT_T_H
#define FIRM_IR_IROPT_T_H
+#include "irop_t.h"
#include "iropt.h"
#include "irnode_t.h"
#include "pset.h"
#include "tv.h"
-ir_node *equivalent_node(ir_node *n);
-
/**
* Calculate a hash value of a node.
- * The hash value is calculated from the nodes predecessors.
- * Special handling for Const and SymConst nodes (these don't have predecessors).
*
* @param node The IR-node
*/
-unsigned ir_node_hash(ir_node *node);
+unsigned ir_node_hash(const ir_node *node);
+
+/**
+ * equivalent_node() returns a node equivalent to input n. It skips all nodes that
+ * perform no actual computation, as, e.g., the Id nodes. It does not create
+ * new nodes. It is therefore safe to free n if the node returned is not n.
+ * If a node returns a Tuple we can not just skip it. If the size of the
+ * in array fits, we transform n into a tuple (e.g., Div).
+ */
+ir_node *equivalent_node(ir_node *n);
/**
* Creates a new value table used for storing CSE identities.
/** Visit each node in the value table of a graph. */
void visit_all_identities(ir_graph *irg, irg_walk_func visit, void *env);
+/**
+ * Normalize a node by putting constants (and operands with larger
+ * node index) on the right (operator side).
+ *
+ * @param n The node to normalize
+ */
+void ir_normalize_node(ir_node *n);
+
ir_node *optimize_node(ir_node *n);
ir_node *optimize_in_place_2(ir_node *n);
/**
- * Returns the tarval of a Const node or tarval_bad for all other nodes.
+ * The value_of operation.
+ * This operation returns for every IR node an associated tarval if existing,
+ * returning tarval_bad otherwise.
+ * No calculations are done here, just a lookup.
+ */
+typedef tarval *(*value_of_func)(const ir_node *self);
+
+extern value_of_func value_of_ptr;
+
+/**
+ * Set a new value_of function.
+ *
+ * @param func the function, NULL restores the default behavior
+ */
+void set_value_of_func(value_of_func func);
+
+/**
+ * Returns the associated tarval of a node.
*/
-static INLINE tarval *
-value_of(ir_node *n) {
- if ((n != NULL) && is_Const(n))
- return get_Const_tarval(n); /* might return tarval_bad */
- else
- return tarval_bad;
+static inline tarval *
+value_of(const ir_node *n) {
+ return value_of_ptr(n);
}
/**