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);
30 for(i = get_irn_arity(node) - 1; i >= 0; --i) {
31 irg_walk_2(get_irn_n(node, i), pre, post, env);
41 void irg_walk(ir_node *node,
42 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
48 i = get_irg_visited(current_ir_graph);
50 set_irg_visited(current_ir_graph, i);
51 irg_walk_2(node, pre, post, env);
55 /***************************************************************************/
56 void irg_block_walk_2(ir_node *node,
57 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
62 assert(get_irn_opcode(node) == iro_Block);
65 if(get_Block_block_visit(node) < get_irg_block_visited(current_ir_graph)) {
66 set_Block_block_visit(node, get_irg_block_visited(current_ir_graph));
71 for(i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
73 /* find the corresponding predecessor block. */
74 ir_node *pred = skip_Proj(get_Block_cfgpred(node, i));
75 /* GL: I'm not sure whether this assert must go through. There
76 could be Id chains?? */
77 assert(is_cfop(pred) || is_fragile_op(pred));
78 pred = get_nodes_Block(pred);
79 assert(get_irn_opcode(pred) == iro_Block);
82 irg_block_walk_2(pred, pre, post, env);
92 /* walks only over Block nodes in the graph. Has it's own visited
93 flag, so that it can be interleaved with the other walker. */
94 void irg_block_walk(ir_node *node,
95 void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
101 i = get_irg_block_visited(current_ir_graph);
103 set_irg_block_visited(current_ir_graph, i);
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);