}
-/* walks only over Block nodes in the graph. Has it's own visited
+/* walks only over Block nodes in the graph. Has its own visited
flag, so that it can be interleaved with the other walker. */
-void irg_block_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env)
+void irg_block_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post,
+ void *env)
{
- ir_graph *irg = get_irn_irg(node);
- ir_node *block, *pred;
- int i;
+ ir_graph *irg = get_irn_irg(node);
+ ir_node *block = is_Block(node) ? node : get_nodes_block(node);
hook_irg_block_walk(irg, node, (generic_func *)pre, (generic_func *)post);
- assert(node);
ir_reserve_resources(irg, IR_RESOURCE_BLOCK_VISITED);
inc_irg_block_visited(irg);
- block = is_Block(node) ? node : get_nodes_block(node);
- assert(is_Block(block));
irg_block_walk_2(block, pre, post, env);
- /* keepalive: the endless loops ... */
+ /* Some blocks might be only reachable through keep-alive edges */
if (is_End(node)) {
int arity = get_irn_arity(node);
+ int i;
for (i = 0; i < arity; i++) {
- pred = get_irn_n(node, i);
- if (!is_Block(pred)) {
- pred = get_nodes_block(pred);
- if (!is_Block(pred)) {
- /* if rare cases a kept node might have a bad block input */
- continue;
- }
- }
- /* Sometimes the blocks died, but are still reachable through kept nodes.
- * Make sure the algorithms that try to remove these reach them. */
+ ir_node *pred = get_irn_n(node, i);
+ if (!is_Block(pred))
+ continue;
irg_block_walk_2(pred, pre, post, env);
}
}
ir_graph * rem = current_ir_graph;
current_ir_graph = irg;
+ ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
inc_irg_visited(irg);
irg_walk_2(irg->anchor, pre, post, env);
+ ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
current_ir_graph = rem;
}
/* Walks over all code in const_code_irg. */
void walk_const_code(irg_walk_func *pre, irg_walk_func *post, void *env)
{
- int j;
walk_env my_env;
ir_segment_t s;
size_t i;
for (i = 0; i < n_types; i++) {
ir_type *tp = get_irp_type(i);
if (is_Array_type(tp)) {
- int n_dim = get_array_n_dimensions(tp);
+ size_t j, n_dim = get_array_n_dimensions(tp);
for (j = 0; j < n_dim; j++) {
ir_node *n = get_array_lower_bound(tp, j);
if (n) irg_walk(n, pre, post, env);