1 /* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
2 ** All rights reserved.
4 ** Author: Boris Boesler
6 ** traverse an ir graph
7 ** - execute the pre function before recursion
8 ** - execute the post function after recursion
12 # include "irgraph.h" /* visited flag */
15 void irg_walk_2(ir_node *node,
16 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
22 if(get_irn_visited(node) < get_irg_visited(current_ir_graph)) {
23 set_irn_visited(node, get_irg_visited(current_ir_graph));
28 if (is_no_Block(node)) {
29 irg_walk_2(get_nodes_Block(node), pre, post, env);
31 for(i = get_irn_arity(node) - 1; i >= 0; --i) {
32 irg_walk_2(get_irn_n(node, i), pre, post, env);
42 void irg_walk(ir_node *node,
43 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
47 inc_irg_visited (current_ir_graph);
48 irg_walk_2(node, pre, post, env);
52 /***************************************************************************/
53 void irg_block_walk_2(ir_node *node, void (pre)(ir_node*, void*),
54 void (post)(ir_node*, void*), void *env)
58 assert(get_irn_opcode(node) == iro_Block);
60 if(get_Block_block_visited(node) < get_irg_block_visited(current_ir_graph)) {
61 set_Block_block_visited(node, get_irg_block_visited(current_ir_graph));
66 for(i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
68 /* find the corresponding predecessor block. */
69 ir_node *pred = skip_Proj(get_Block_cfgpred(node, i));
70 /* GL: I'm not sure whether this assert must go through. There
71 could be Id chains?? */
72 assert(is_cfop(pred) || is_fragile_op(pred));
73 pred = get_nodes_Block(pred);
74 assert(get_irn_opcode(pred) == iro_Block);
77 irg_block_walk_2(pred, pre, post, env);
87 /* walks only over Block nodes in the graph. Has it's own visited
88 flag, so that it can be interleaved with the other walker. */
89 void irg_block_walk(ir_node *node,
90 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
94 inc_irg_block_visited(current_ir_graph);
95 if (is_no_Block(node)) node = get_nodes_Block(node);
96 assert(get_irn_opcode(node) == iro_Block);
97 irg_block_walk_2(node, pre, post, env);