* @file
* @brief Functions for traversing ir graphs
* @author Boris Boesler, Goetz Lindenmaier, Michael Beck
- * @version $Id$
* @brief
* traverse an ir graph
* - execute the pre function before recursion
#include "irgwalk.h"
#include "irhooks.h"
#include "entity_t.h"
+#include "ircons.h"
#include "error.h"
#include "pset_new.h"
return cnt;
}
-/**
- * Intraprozedural graph walker.
- *
- * @return number of visited nodes
- */
unsigned irg_walk_2(ir_node *node, irg_walk_func *pre, irg_walk_func *post,
void *env)
{
current_ir_graph = rem;
}
-/*
- * walk over a graph
- */
void irg_walk_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env)
{
ir_graph * rem = current_ir_graph;
current_ir_graph = rem;
}
-/* Executes irg_walk(end, pre, post, env) for all irgraphs in irprog.
- Sets current_ir_graph properly for each walk. Conserves current
- current_ir_graph. */
void all_irg_walk(irg_walk_func *pre, irg_walk_func *post, void *env)
{
size_t i, n;
}
}
-/***************************************************************************/
-
/**
* specialized version of irg_walk_in_or_dep_2, called if only pre callback exists
*
else return irg_walk_in_or_dep_2_both(node, pre, post, env);
}
-/*
- * Generic graph walker. Follows dependency edges as well.
- */
void irg_walk_in_or_dep(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env)
{
assert(is_ir_node(node));
ir_free_resources(current_ir_graph, IR_RESOURCE_IRN_VISITED);
}
-/*
- * Walk over a graph. Follow all edges (including dependencies)
- */
void irg_walk_in_or_dep_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env)
{
ir_graph * rem = current_ir_graph;
current_ir_graph = rem;
}
-/***************************************************************************/
-
/* Walks back from n until it finds a real cf op. */
static ir_node *get_cf_op(ir_node *n)
{
post(node, env);
}
-
-/* walks only over Block nodes in the graph. Has it's 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_free_resources(irg, IR_RESOURCE_BLOCK_VISITED);
}
-/*
- * walk over a graph block wise
- */
void irg_block_walk_graph(ir_graph *irg, irg_walk_func *pre,
irg_walk_func *post, void *env)
{
current_ir_graph = rem;
}
-/*
- * Additionally walk over all anchors. Do NOT increase the visit flag.
- */
void irg_walk_anchors(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *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;
}
-/********************************************************************/
-
typedef struct walk_env {
irg_walk_func *pre;
irg_walk_func *post;
}
}
-/* 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);
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