-static int compare_nodes(const ir_node *node1, const ir_node *node2)
-{
- const_class_t class1 = get_const_class(node1, commutative_block);
- const_class_t class2 = get_const_class(node2, commutative_block);
-
- if (class1 == class2)
- return 0;
- // return get_irn_idx(node1) - get_irn_idx(node2);
-
- if (class1 < class2)
- return -1;
-
- assert(class1 > class2);
- return 1;
-}
-
-static int compare_node_ptr(const void *e1, const void *e2)
-{
- const ir_node *node1 = *((const ir_node *const*) e1);
- const ir_node *node2 = *((const ir_node *const*) e2);
- return compare_nodes(node1, node2);
-}
-
-static int reassoc_commutative(ir_node **n)
-{
- int i;
- int n_args;
- ir_node *last;
- ir_node **args;
- ir_mode *mode;
- ir_node *node = *n;
-
- commutative_op = get_irn_op(node);
- commutative_block = get_nodes_block(node);
-
- /* collect all nodes with same op type */
- collect_args(node);
-
- n_args = obstack_object_size(&commutative_args) / sizeof(ir_node*);
- args = obstack_finish(&commutative_args);
-
- /* shortcut: in most cases there's nothing to do */
- if (n_args == 2 && compare_nodes(args[0], args[1]) <= 0) {
- obstack_free(&commutative_args, args);
- return 0;
- }
-
- /* sort the arguments */
- qsort(args, n_args, sizeof(ir_node*), compare_node_ptr);
-
- /* build new tree */
- last = args[n_args-1];
- mode = get_irn_mode(last);
- for (i = n_args-2; i >= 0; --i) {
- ir_mode *mode_right;
- ir_node *new_node;
- ir_node *in[2];
- ir_graph *irg = get_irn_irg(last);
-
- in[0] = last;
- in[1] = args[i];
-
- /* AddP violates the assumption that all modes in args are equal...
- * we need some hacks to cope with this */
- mode_right = get_irn_mode(in[1]);
- if (mode_is_reference(mode_right)) {
- assert(is_Add(node) && mode_is_reference(get_irn_mode(node)));
- mode = get_irn_mode(in[1]);
- }
- if (mode_right != mode) {
- assert(is_Add(node) && mode_is_reference(get_irn_mode(node)));
- in[1] = new_r_Conv(irg, commutative_block,in[1], mode);
- }
-
- /* TODO: produce useful debug info! */
- new_node = new_ir_node(NULL, irg, commutative_block,
- commutative_op, mode, 2, in);
- new_node = optimize_node(new_node);
- last = new_node;
- }
-
- /* CSE often returns the old node again, only exchange if needed */
- if (last != node) {
- exchange(node, last);
- *n = last;
- return 1;
- }
- return 0;
-}
-
-#endif
-
-#define reassoc_Add reassoc_commutative
-#define reassoc_And reassoc_commutative
-#define reassoc_Or reassoc_commutative
-#define reassoc_Eor reassoc_commutative
-