* Scheduling environment for the whole graph.
*/
typedef struct _sched_env_t {
- const ir_graph *irg; /**< The graph to schedule. */
- const list_sched_selector_t *selector; /**< The node selector. */
- void *selector_env; /**< A pointer to give to the selector. */
+ const list_sched_selector_t *selector; /**< The node selector. */
+ const arch_env_t *arch_env; /**< The architecture enviromnent. */
+ const ir_graph *irg; /**< The graph to schedule. */
+ void *selector_env; /**< A pointer to give to the selector. */
} sched_env_t;
#if 0
}
#endif
-static ir_node *trivial_select(void *block_env, pset *ready_set)
+/**
+ * The trivial selector:
+ * Just assure that branches are executed last, otherwise select
+ * the first node ready.
+ */
+static ir_node *trivial_select(void *block_env, nodeset *ready_set)
{
- ir_node *res;
+ const arch_env_t *arch_env = block_env;
+ ir_node *irn = NULL;
+ int const_last = 0;
- res = pset_first(ready_set);
- pset_break(ready_set);
- return res;
+ /* assure that branches and constants are executed last */
+ for (irn = nodeset_first(ready_set); irn; irn = nodeset_next(ready_set)) {
+ arch_irn_class_t irn_class = arch_irn_classify(arch_env, irn);
+
+ if (irn_class != arch_irn_class_branch && (const_last ? (irn_class != arch_irn_class_const) : 1)) {
+ nodeset_break(ready_set);
+ return irn;
+ }
+ }
+
+ /* assure that constants are executed before branches */
+ if (const_last) {
+ for (irn = nodeset_first(ready_set); irn; irn = nodeset_next(ready_set)) {
+ if (arch_irn_classify(arch_env, irn) != arch_irn_class_branch) {
+ nodeset_break(ready_set);
+ return irn;
+ }
+ }
+ }
+
+
+ /* at last: schedule branches */
+ irn = nodeset_first(ready_set);
+ nodeset_break(ready_set);
+
+ return irn;
+}
+
+static void *trivial_init_graph(const list_sched_selector_t *vtab, const arch_env_t *arch_env, ir_graph *irg)
+{
+ return (void *) arch_env;
+}
+
+static void *trivial_init_block(void *graph_env, ir_node *bl)
+{
+ return graph_env;
}
static INLINE int must_appear_in_schedule(const list_sched_selector_t *sel, void *block_env, const ir_node *irn)
}
static const list_sched_selector_t trivial_selector_struct = {
- NULL,
- NULL,
+ trivial_init_graph,
+ trivial_init_block,
trivial_select,
NULL,
NULL,
scheduled. */
} usage_stats_t;
+typedef struct {
+ const list_sched_selector_t *vtab;
+ const arch_env_t *arch_env;
+} reg_pressure_main_env_t;
+
typedef struct {
struct obstack obst;
+ const reg_pressure_main_env_t *main_env;
usage_stats_t *root;
- pset *already_scheduled;
- const list_sched_selector_t *vtab;
+ nodeset *already_scheduled;
} reg_pressure_selector_env_t;
static INLINE usage_stats_t *get_or_set_usage_stats(reg_pressure_selector_env_t *env, ir_node *irn)
* If the node is in the current block but not
* yet scheduled, we keep on searching from that node.
*/
- if(!pset_find_ptr(env->already_scheduled, irn)) {
+ if(!nodeset_find(env->already_scheduled, irn)) {
int i, n;
int res = 0;
for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
return res;
}
-static void *reg_pressure_graph_init(const list_sched_selector_t *vtab, const arch_isa_t *isa, ir_graph *irg)
+static void *reg_pressure_graph_init(const list_sched_selector_t *vtab, const arch_env_t *arch_env, ir_graph *irg)
{
+ reg_pressure_main_env_t *main_env = xmalloc(sizeof(main_env[0]));
+
+ main_env->arch_env = arch_env;
+ main_env->vtab = vtab;
irg_walk_graph(irg, firm_clear_link, NULL, NULL);
- return (void *) vtab;
+
+ return main_env;
}
static void *reg_pressure_block_init(void *graph_env, ir_node *bl)
reg_pressure_selector_env_t *env = xmalloc(sizeof(env[0]));
obstack_init(&env->obst);
- env->already_scheduled = pset_new_ptr(32);
+ env->already_scheduled = new_nodeset(32);
env->root = NULL;
- env->vtab = graph_env;
+ env->main_env = graph_env;
/*
* Collect usage statistics.
*/
sched_foreach(bl, irn) {
- if(must_appear_in_schedule(env->vtab, env, irn)) {
+ if(must_appear_in_schedule(env->main_env->vtab, env, irn)) {
int i, n;
for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
ir_node *op = get_irn_n(irn, i);
- if(must_appear_in_schedule(env->vtab, env, irn)) {
+ if(must_appear_in_schedule(env->main_env->vtab, env, irn)) {
usage_stats_t *us = get_or_set_usage_stats(env, irn);
if(is_live_end(bl, op))
us->uses_in_block = 99999;
set_irn_link(us->irn, NULL);
obstack_free(&env->obst, NULL);
- del_pset(env->already_scheduled);
+ del_nodeset(env->already_scheduled);
free(env);
}
for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
ir_node *op = get_irn_n(irn, i);
- if(must_appear_in_schedule(env->vtab, env, op))
+ if(must_appear_in_schedule(env->main_env->vtab, env, op))
sum += compute_max_hops(env, op);
}
return sum;
}
-static ir_node *reg_pressure_select(void *block_env, pset *ready_set)
+static ir_node *reg_pressure_select(void *block_env, nodeset *ready_set)
{
reg_pressure_selector_env_t *env = block_env;
ir_node *irn, *res = NULL;
int curr_cost = INT_MAX;
- assert(pset_count(ready_set) > 0);
-
- for(irn = pset_first(ready_set); irn; irn = pset_next(ready_set)) {
- int costs = reg_pr_costs(env, irn);
- if(costs <= curr_cost) {
- res = irn;
- curr_cost = costs;
+ assert(nodeset_count(ready_set) > 0);
+
+ for (irn = nodeset_first(ready_set); irn; irn = nodeset_next(ready_set)) {
+ /*
+ Ignore branch instructions for the time being.
+ They should only be scheduled if there is nothing else.
+ */
+ if (arch_irn_classify(env->main_env->arch_env, irn) != arch_irn_class_branch) {
+ int costs = reg_pr_costs(env, irn);
+ if (costs <= curr_cost) {
+ res = irn;
+ curr_cost = costs;
+ }
}
}
- pset_insert_ptr(env->already_scheduled, res);
+ /*
+ There was no result so we only saw a branch.
+ Take it and finish.
+ */
+
+ if(!res) {
+ res = nodeset_first(ready_set);
+ nodeset_break(ready_set);
+
+ assert(res && "There must be a node scheduled.");
+ }
+
+ nodeset_insert(env->already_scheduled, res);
return res;
}
reg_pressure_select,
NULL,
reg_pressure_block_free,
- NULL
+ free
};
const list_sched_selector_t *reg_pressure_selector = ®_pressure_selector_struct;
static void list_sched_block(ir_node *block, void *env_ptr);
-void list_sched(const struct _arch_isa_t *isa, ir_graph *irg)
+void list_sched(const arch_env_t *arch_env, ir_graph *irg)
{
sched_env_t env;
- const list_sched_selector_t *selector;
memset(&env, 0, sizeof(env));
- selector = env.selector = isa->impl->get_list_sched_selector(isa);
- env.selector_env = selector->init_graph ? selector->init_graph(selector, isa, irg) : NULL;
- env.irg = irg;
+ env.selector = arch_env->isa->impl->get_list_sched_selector(arch_env->isa);
+ env.arch_env = arch_env;
+ env.irg = irg;
+
+ if(env.selector->init_graph)
+ env.selector_env = env.selector->init_graph(env.selector, arch_env, irg);
/* Assure, that the out edges are computed */
edges_assure(irg);
/* Schedule each single block. */
irg_block_walk_graph(irg, list_sched_block, NULL, &env);
- if(selector->finish_graph)
- selector->finish_graph(env.selector_env);
+ if(env.selector->finish_graph)
+ env.selector->finish_graph(env.selector_env);
}
*/
typedef struct _block_sched_env_t {
int curr_time;
- pset *ready_set;
- pset *already_scheduled;
+ nodeset *ready_set;
+ nodeset *already_scheduled;
ir_node *block;
- firm_dbg_module_t *dbg;
const list_sched_selector_t *selector;
void *selector_block_env;
+ DEBUG_ONLY(firm_dbg_module_t *dbg;)
} block_sched_env_t;
/**
for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
ir_node *op = get_irn_n(irn, i);
+ /* if irn is an End we have keep-alives and op might be a block, skip that */
+ if (is_Block(op)) {
+ assert(get_irn_op(irn) == op_End);
+ continue;
+ }
+
/* If the operand is local to the scheduled block and not yet
* scheduled, this nodes cannot be made ready, so exit. */
- if(!pset_find_ptr(env->already_scheduled, op) && get_nodes_block(op) == env->block)
+ if(!nodeset_find(env->already_scheduled, op) && get_nodes_block(op) == env->block)
return 0;
}
DBG((env->dbg, LEVEL_2, "\tmaking ready: %+F\n", irn));
- pset_insert_ptr(env->ready_set, irn);
+ nodeset_insert(env->ready_set, irn);
return 1;
}
* @return 1 if the node was ready, 0 if not.
*/
#define is_ready(env,irn) \
- (pset_find_ptr((env)->ready_set, irn) != NULL)
+ (nodeset_find((env)->ready_set, irn) != NULL)
/**
* Check, if a node has already been schedules.
* @return 1 if the node was already scheduled, 0 if not.
*/
#define is_scheduled(env,irn) \
- (pset_find_ptr((env)->already_scheduled, irn) != NULL)
+ (nodeset_find((env)->already_scheduled, irn) != NULL)
/**
* Try, to make all users of a node ready.
}
/* Insert the node in the set of all already scheduled nodes. */
- pset_insert_ptr(env->already_scheduled, irn);
+ nodeset_insert(env->already_scheduled, irn);
/* Remove the node from the ready set */
- if(pset_find_ptr(env->ready_set, irn))
- pset_remove_ptr(env->ready_set, irn);
+ if(nodeset_find(env->ready_set, irn))
+ nodeset_remove(env->ready_set, irn);
return irn;
}
{
ir_node *irn;
- for(irn = pset_first(be->ready_set); irn; irn = pset_next(be->ready_set)) {
- if(be_is_Keep(irn)) {
- pset_break(be->ready_set);
+ for (irn = nodeset_first(be->ready_set); irn; irn = nodeset_next(be->ready_set)) {
+ if (be_is_Keep(irn)) {
+ nodeset_break(be->ready_set);
return irn;
}
}
*/
static void list_sched_block(ir_node *block, void *env_ptr)
{
- sched_env_t *env = env_ptr;
- block_sched_env_t be;
+ sched_env_t *env = env_ptr;
const list_sched_selector_t *selector = env->selector;
+ ir_node *start_node = get_irg_start(get_irn_irg(block));
+ int phi_seen = 0;
+ sched_info_t *info = get_irn_sched_info(block);
+
+ block_sched_env_t be;
const ir_edge_t *edge;
ir_node *irn;
- ir_node *start_node = get_irg_start(get_irn_irg(block));
- ir_node *final_jmp = NULL;
int j, m;
- int phi_seen = 0;
- sched_info_t *info = get_irn_sched_info(block);
/* Initialize the block's list head that will hold the schedule. */
INIT_LIST_HEAD(&info->list);
/* Initialize the block scheduling environment */
- be.dbg = firm_dbg_register("firm.be.sched");
be.block = block;
be.curr_time = 0;
- be.ready_set = new_pset(node_cmp_func, get_irn_n_edges(block));
- be.already_scheduled = new_pset(node_cmp_func, get_irn_n_edges(block));
+ be.ready_set = new_nodeset(get_irn_n_edges(block));
+ be.already_scheduled = new_nodeset(get_irn_n_edges(block));
be.selector = selector;
+ FIRM_DBG_REGISTER(be.dbg, "firm.be.sched");
if(selector->init_block)
be.selector_block_env = selector->init_block(env->selector_env, block);
phi_seen = 1;
}
+ /* The start block will be scheduled as the first node */
else if(irn == start_node) {
add_to_sched(&be, irn);
add_tuple_projs(&be, irn);
}
- else if(get_irn_opcode(irn) == iro_Jmp) {
- final_jmp = irn;
- }
/* Other nodes must have all operands in other blocks to be made
* ready */
/* Increase the time, if some phi functions have been scheduled */
be.curr_time += phi_seen;
- while(pset_count(be.ready_set) > 0) {
+ while (nodeset_count(be.ready_set) > 0) {
/* select a node to be scheduled and check if it was ready */
irn = select_node(&be);
be.curr_time += 1;
/* remove the scheduled node from the ready list. */
- if(pset_find_ptr(be.ready_set, irn))
- pset_remove_ptr(be.ready_set, irn);
+ if (nodeset_find(be.ready_set, irn))
+ nodeset_remove(be.ready_set, irn);
}
if(selector->finish_block)
selector->finish_block(be.selector_block_env);
- if(final_jmp)
- add_to_sched(&be, final_jmp);
-
- del_pset(be.ready_set);
- del_pset(be.already_scheduled);
+ del_nodeset(be.ready_set);
+ del_nodeset(be.already_scheduled);
}
projects / libfirm / blobdiff