static void copy_node_dce(ir_node *node, void *env)
{
- int i;
- ir_node *new_node = exact_copy(node);
- ir_graph *irg = get_irn_irg(new_node);
+ ir_phase_id i;
+ ir_node *new_node = exact_copy(node);
+ ir_graph *irg = get_irn_irg(new_node);
(void) env;
/* preserve the node numbers for easier debugging */
new_node->node_nr = node->node_nr;
/* copy phase information for this node */
- for (i = 0; i <= PHASE_LAST; i++) {
+ for (i = PHASE_FIRST; i <= PHASE_LAST; ++i) {
ir_phase *phase = irg_get_phase(irg, i);
if (phase == NULL)
continue;
}
/**
- * Copies the graph reachable from current_ir_graph->end to the obstack
- * in current_ir_graph and fixes the environment.
- * Then fixes the fields in current_ir_graph containing nodes of the
- * graph.
+ * Copies the graph reachable from the End node to the obstack
+ * in irg. Then fixes the fields containing nodes of the graph.
*
* @param copy_node_nr If non-zero, the node number will be copied
*/
static void copy_graph_env(ir_graph *irg)
{
- ir_node *new_anchor;
- int i;
+ ir_node *new_anchor;
+ ir_phase_id i;
/* init the new_phases array */
/* TODO: this is wrong, it should only allocate a new data_ptr inside
* the phase! */
- for (i = 0; i <= PHASE_LAST; i++) {
+ for (i = PHASE_FIRST; i <= PHASE_LAST; ++i) {
ir_phase *old_ph = irg_get_phase(irg, i);
if (old_ph == NULL) {
new_phases[i] = NULL;
irg_walk_anchors(irg, copy_node_dce, rewire_inputs, NULL);
/* fix the anchor */
- new_anchor = get_irn_link(irg->anchor);
+ new_anchor = (ir_node*)get_irn_link(irg->anchor);
assert(new_anchor != NULL);
irg->anchor = new_anchor;
/* copy the new phases into the irg */
- for (i = 0; i <= PHASE_LAST; i++) {
+ for (i = PHASE_FIRST; i <= PHASE_LAST; ++i) {
ir_phase *old_ph = irg_get_phase(irg, i);
if (old_ph == NULL)
continue;
*/
void dead_node_elimination(ir_graph *irg)
{
- ir_graph *rem;
struct obstack *graveyard_obst = NULL;
struct obstack *rebirth_obst = NULL;
/* inform statistics that we started a dead-node elimination run */
hook_dead_node_elim(irg, 1);
- /* Remember external state of current_ir_graph. */
- rem = current_ir_graph;
- current_ir_graph = irg;
-
assert(get_irg_phase_state(irg) != phase_building);
/* Handle graph state */
irg->last_node_idx = 0;
/* We also need a new value table for CSE */
- del_identities(irg->value_table);
- irg->value_table = new_identities();
+ new_identities(irg);
/* Copy the graph from the old to the new obstack */
copy_graph_env(irg);
/* inform statistics that the run is over */
hook_dead_node_elim(irg, 0);
-
- current_ir_graph = rem;
}
ir_graph_pass_t *dead_node_elimination_pass(const char *name)
__)|_| | \_/ | \_/(/_ |_/\__|__
The following stuff implements a facility that automatically patches
- registered ir_node pointers to the new node when a dead node elimination occurs.
-
+ registered ir_node pointers to the new node when a dead node elimination
+ occurs.
Warning: This is considered a hack - try hard to avoid this!
*/
-struct _survive_dce_t {
+struct survive_dce_t {
struct obstack obst;
pmap *places;
pmap *new_places;
hook_entry_t dead_node_elim_subst;
};
-typedef struct _survive_dce_list_t {
- struct _survive_dce_list_t *next;
+typedef struct survive_dce_list_t {
+ struct survive_dce_list_t *next;
ir_node **place;
} survive_dce_list_t;
static void dead_node_hook(void *context, ir_graph *irg, int start)
{
- survive_dce_t *sd = context;
+ survive_dce_t *sd = (survive_dce_t*)context;
(void) irg;
/* Create a new map before the dead node elimination is performed. */
*/
static void dead_node_subst_hook(void *context, ir_graph *irg, ir_node *old, ir_node *nw)
{
- survive_dce_t *sd = context;
- survive_dce_list_t *list = pmap_get(sd->places, old);
+ survive_dce_t *sd = (survive_dce_t*)context;
+ survive_dce_list_t *list = (survive_dce_list_t*)pmap_get(sd->places, old);
(void) irg;
/* If the node is to be patched back, write the new address to all registered locations. */
{
if (*place != NULL) {
ir_node *irn = *place;
- survive_dce_list_t *curr = pmap_get(sd->places, irn);
+ survive_dce_list_t *curr = (survive_dce_list_t*)pmap_get(sd->places, irn);
survive_dce_list_t *nw = OALLOC(&sd->obst, survive_dce_list_t);
nw->next = curr;