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 /* printf(" - "); DDMSG2(node); */
24 if (get_irn_visited(node) < get_irg_visited(current_ir_graph)) {
26 /* printf(" -> "); DDMSG2(node); */
27 set_irn_visited(node, get_irg_visited(current_ir_graph));
33 if (is_no_Block(node)) {
34 irg_walk_2(get_nodes_Block(node), pre, post, env);
36 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
37 /* printf(" "); DDMSG2(node); */
38 /* printf(" "); DDMSG2(get_irn_n(node, i)); */
40 irg_walk_2(get_irn_n(node, i), pre, post, env);
43 /* printf(" <- "); DDMSG2(node); */
51 void irg_walk(ir_node *node,
52 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
56 inc_irg_visited (current_ir_graph);
57 irg_walk_2(node, pre, post, env);
61 /***************************************************************************/
62 void irg_block_walk_2(ir_node *node, void (pre)(ir_node*, void*),
63 void (post)(ir_node*, void*), void *env)
67 assert(get_irn_opcode(node) == iro_Block);
69 if(get_Block_block_visited(node) < get_irg_block_visited(current_ir_graph)) {
70 set_Block_block_visited(node, get_irg_block_visited(current_ir_graph));
75 for(i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
77 /* find the corresponding predecessor block. */
78 ir_node *pred = skip_Proj(get_Block_cfgpred(node, i));
79 /* GL: I'm not sure whether this assert must go through. There
80 could be Id chains?? */
81 assert(is_cfop(pred) || is_fragile_op(pred));
82 pred = get_nodes_Block(pred);
83 assert(get_irn_opcode(pred) == iro_Block);
86 irg_block_walk_2(pred, pre, post, env);
96 /* walks only over Block nodes in the graph. Has it's own visited
97 flag, so that it can be interleaved with the other walker. */
98 void irg_block_walk(ir_node *node,
99 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
103 inc_irg_block_visited(current_ir_graph);
104 if (is_no_Block(node)) node = get_nodes_Block(node);
105 assert(get_irn_opcode(node) == iro_Block);
106 irg_block_walk_2(node, pre, post, env);