+/* $Id$ */
+
#ifdef HAVE_CONFIG_H
-#include "config.h"
+# include "config.h"
#endif
-#include <stdlib.h>
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
#include "impl.h"
#include "irprintf.h"
#include "irgwalk.h"
-#include "irnode_t.h"
+#include "firm_types.h"
+#include "irgraph_t.h"
#include "iredges_t.h"
+#include "ircons.h"
+#include "irextbb.h"
#include "debug.h"
-#include "bearch.h"
+#include "bemodule.h"
+#include "bearch_t.h"
#include "besched_t.h"
#include "beutil.h"
#include "belistsched.h"
FIRM_IMPL1(sched_has_prev, int, const ir_node *)
FIRM_IMPL1(sched_next, ir_node *, const ir_node *)
FIRM_IMPL1(sched_prev, ir_node *, const ir_node *)
+FIRM_IMPL1(sched_is_scheduled, int, const ir_node *)
FIRM_IMPL1(sched_first, ir_node *, const ir_node *)
FIRM_IMPL1(sched_last, ir_node *, const ir_node *)
FIRM_IMPL2(sched_add_after, ir_node *, ir_node *, ir_node *)
FIRM_IMPL2(sched_add_before, ir_node *, ir_node *, ir_node *)
+FIRM_IMPL1_VOID(sched_init_block, ir_node *)
+FIRM_IMPL1_VOID(sched_reset, ir_node *)
+FIRM_IMPL2(sched_comes_after, int, const ir_node *, const ir_node *)
FIRM_IMPL1_VOID(sched_remove, ir_node *)
size_t sched_irn_data_offset = 0;
static void block_sched_dumper(ir_node *block, void *env)
{
- FILE *f = env;
+ FILE *f = env;
const ir_node *curr;
ir_fprintf(f, "%+F:\n", block);
+
sched_foreach(block, curr) {
- sched_info_t *info = get_irn_sched_info(curr);
+ sched_info_t *info = get_irn_sched_info(curr);
ir_fprintf(f, "\t%6d: %+F\n", info->time_step, curr);
}
}
-void be_sched_dump(FILE *f, const ir_graph *irg)
+void be_sched_dump(FILE *f, ir_graph *irg)
{
- irg_block_walk_graph((ir_graph *) irg, block_sched_dumper, NULL, f);
+ irg_block_walk_graph(irg, block_sched_dumper, NULL, f);
}
-void be_sched_init(void)
+/* Init the scheduling stuff. */
+void be_init_sched(void)
{
sched_irn_data_offset = register_additional_node_data(sizeof(sched_info_t));
- firm_dbg_register("be.sched");
}
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_sched);
+
void sched_renumber(const ir_node *block)
{
- ir_node *irn;
- sched_info_t *inf;
- sched_timestep_t step = 0;
-
- sched_foreach(block, irn) {
- inf = get_irn_sched_info(irn);
- inf->time_step = step;
- step += SCHED_INITIAL_GRANULARITY;
- }
+ ir_node *irn;
+ sched_info_t *inf;
+ sched_timestep_t step = SCHED_INITIAL_GRANULARITY;
+
+ sched_foreach(block, irn) {
+ inf = get_irn_sched_info(irn);
+ inf->time_step = step;
+ step += SCHED_INITIAL_GRANULARITY;
+ }
}
+int sched_skip_cf_predicator(const ir_node *irn, void *data) {
+ arch_env_t *ae = data;
+ return arch_irn_class_is(ae, irn, branch);
+}
+
+int sched_skip_phi_predicator(const ir_node *irn, void *data) {
+ return is_Phi(irn);
+}
-int sched_verify(const ir_node *block)
+/* Skip nodes in a schedule. */
+ir_node *sched_skip(ir_node *from, int forward, sched_predicator_t *predicator, void *data)
{
- firm_dbg_module_t *dbg_sched = firm_dbg_register("be.sched");
- int res = 1;
- const ir_node *irn;
- int i, n;
- int *save_time_step;
- ir_node **save_nodes;
- const ir_edge_t *edge;
- pset *scheduled_nodes = pset_new_ptr_default();
-
- firm_dbg_set_mask(dbg_sched, -1);
-
- /* Count the number of nodes in the schedule. */
- n = 0;
- sched_foreach(block, irn)
- n++;
-
- if(n <= 0)
- return 1;
-
- save_time_step = malloc(n * sizeof(save_time_step[0]));
- save_nodes = malloc(n * sizeof(save_nodes[0]));
-
- i = 0;
- sched_foreach(block, irn) {
- sched_info_t *info = get_irn_sched_info(irn);
- save_time_step[i] = info->time_step;
- save_nodes[i] = (ir_node *)irn;
- info->time_step = i;
- pset_insert_ptr(scheduled_nodes, irn);
-
- i += 1;
- }
-
- /*
- * Check if each relevant operand of a node is scheduled before
- * the node itself.
- */
- sched_foreach(block, irn) {
- int i, n;
- int step = sched_get_time_step(irn);
-
- for(i = 0, n = get_irn_arity(irn); i < n; i++) {
- ir_node *op = get_irn_n(irn, i);
-
- if(to_appear_in_schedule(op)
- && !is_Phi(irn)
- && get_nodes_block(op) == block
- && sched_get_time_step(op) > step) {
-
- DBG((dbg_sched, LEVEL_DEFAULT,
- "%+F: %+F is operand of %+F but scheduled after\n", block, op, irn));
- res = 0;
- }
- }
- }
-
- /* Check, if the time steps are correct */
- for(i = 1; i < n; ++i) {
- if(save_time_step[i] - save_time_step[i - 1] <= 0) {
- DBG((dbg_sched, LEVEL_DEFAULT,
- "%+F from %+F(%d) -> %+F(%d) step shrinks from %d -> %d\n",
- block, save_nodes[i - 1], i - 1, save_nodes[i], i,
- save_time_step[i - 1], save_time_step[i]));
- res = 0;
- }
- }
-
- /* Restore the old time steps */
- i = 0;
- sched_foreach(block, irn) {
- sched_info_t *info = get_irn_sched_info(irn);
- info->time_step = save_time_step[i++];
- }
-
- /* Check for all nodes in the block if they are scheduled. */
- foreach_out_edge(block, edge) {
- ir_node *irn = get_edge_src_irn(edge);
- if(to_appear_in_schedule(irn) && !pset_find_ptr(scheduled_nodes, irn))
- DBG((dbg_sched, LEVEL_DEFAULT,
- "%+F: %+F is in block but not scheduled\n", block, irn));
- }
-
- del_pset(scheduled_nodes);
- free(save_time_step);
- free(save_nodes);
- return res;
+ const ir_node *bl = get_block(from);
+ ir_node *curr;
+
+ if (forward) {
+ if (is_Block(from))
+ from = sched_next(from);
+ for (curr = from; curr != bl && predicator(curr, data); curr = sched_next(curr)) {
+ }
+ } else {
+ if (is_Block(from))
+ from = sched_prev(from);
+ for (curr = from; curr != bl && predicator(curr, data); curr = sched_prev(curr)) {
+ }
+ }
+
+ return curr;
}
-static void sched_verify_walker(ir_node *irn, void *data)
+//---------------------------------------------------------------------------
+
+typedef struct remove_dead_nodes_env_t_ {
+ ir_graph *irg;
+ bitset_t *reachable;
+} remove_dead_nodes_env_t;
+
+/**
+ * Post-walker: remember all visited nodes in a bitset.
+ */
+static void mark_dead_nodes_walker(ir_node *node, void *data)
{
- int *res = data;
- *res &= sched_verify(irn);
+ remove_dead_nodes_env_t *env = (remove_dead_nodes_env_t*) data;
+ bitset_set(env->reachable, get_irn_idx(node));
}
-int sched_verify_irg(ir_graph *irg)
+/**
+ * Post-block-walker:
+ * Walk through the schedule of every block and remove all dead nodes from it.
+ */
+static void remove_dead_nodes_walker(ir_node *block, void *data)
{
- int res = 1;
- irg_block_walk_graph(irg, sched_verify_walker, NULL, &res);
+ remove_dead_nodes_env_t *env = (remove_dead_nodes_env_t*) data;
+ ir_node *node, *next;
- return res;
-}
+ for (node = sched_first(block); ! sched_is_end(node); node = next) {
+ /* get next node now, as after calling sched_remove it will be invalid */
+ next = sched_next(node);
-int sched_skip_cf_predicator(const ir_node *irn, void *data) {
- arch_env_t *ae = data;
- return arch_irn_classify(ae, irn) == arch_irn_class_branch;
-}
+ if (bitset_is_set(env->reachable, get_irn_idx(node)))
+ continue;
-int sched_skip_phi_predicator(const ir_node *irn, void *data) {
- return is_Phi(irn);
+ sched_remove(node);
+ be_kill_node(node);
+ }
}
-extern ir_node *sched_skip(ir_node *from, int forward,
- sched_predicator_t *predicator, void *data)
+void be_remove_dead_nodes_from_schedule(ir_graph *irg)
{
- const ir_node *bl = get_block(from);
- ir_node *curr;
+ remove_dead_nodes_env_t env;
+ env.irg = irg;
+ env.reachable = bitset_alloca(get_irg_last_idx(irg));
+
+ // mark all reachable nodes
+ irg_walk_graph(irg, mark_dead_nodes_walker, NULL, &env);
- for(curr = from; curr != bl && predicator(curr, data);
- curr = forward ? sched_next(curr) : sched_prev(curr));
- return curr;
+ // walk schedule and remove non-marked nodes
+ irg_block_walk_graph(irg, remove_dead_nodes_walker, NULL, &env);
}
projects / libfirm / blobdiff