#include "bechordal_t.h"
#include "bespill.h"
#include "belive_t.h"
+#include "beabi.h"
#include "irgwalk.h"
#include "besched.h"
#include "beutil.h"
#include "bespillbelady.h"
#include "beverify.h"
+#include "benodesets.h"
#define DBG_LIVE 1
#define DBG_LOOPANA 2
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
typedef struct morgan_env {
+ const be_chordal_env_t *cenv;
const arch_env_t *arch;
const arch_register_class_t *cls;
ir_graph *irg;
}
static INLINE int loop_attr_hash(const loop_attr_t *a) {
+#ifdef DEBUG_libfirm
+ return a->loop->loop_nr;
+#else
return HASH_PTR(a->loop);
+#endif
}
static INLINE int block_attr_hash(const block_attr_t *b) {
- return HASH_PTR(b->block);
+ return nodeset_hash(b->block);
}
static INLINE int loop_edge_hash(const loop_edge_t *e) {
- return HASH_PTR(e->block) ^ (e->pos * 31);
+ return nodeset_hash(e->block) ^ (e->pos * 31);
}
static INLINE loop_attr_t *get_loop_attr(morgan_env_t *env, const ir_loop *loop) {
*/
static bitset_t *construct_block_livethrough_unused(morgan_env_t* env, const ir_node* block) {
block_attr_t *block_attr = get_block_attr(env, block);
- irn_live_t *li;
ir_node *node;
+ int i;
DBG((dbg, DBG_LIVE, "Processing block %d\n", get_irn_node_nr(block)));
// copy all live-outs into the livethrough_unused set
- live_foreach(block, li) {
+ be_lv_foreach(env->cenv->lv, block, be_lv_state_in | be_lv_state_out, i) {
+ ir_node *irn = be_lv_get_irn(env->cenv->lv, block, i);
int node_idx;
- if(!live_is_in(li) || !live_is_out(li))
- continue;
- if(!consider_for_spilling(env->arch, env->cls, li->irn))
+ if(!consider_for_spilling(env->arch, env->cls, irn))
continue;
- node_idx = get_irn_idx(li->irn);
+ node_idx = get_irn_idx(irn);
bitset_set(block_attr->livethrough_unused, node_idx);
}
/*---------------------------------------------------------------------------*/
static int reduce_register_pressure_in_block(morgan_env_t *env, const ir_node* block, int loop_unused_spills_possible) {
- int pressure;
- ir_node *irn;
- int max_pressure = 0;
- int spills_needed;
+ ir_node *node;
+ int max_pressure;
int loop_unused_spills_needed;
- block_attr_t *block_attr = get_block_attr(env, block);
- int block_unused_spills_possible = bitset_popcnt(block_attr->livethrough_unused);
- int unused_spills_possible = loop_unused_spills_possible + block_unused_spills_possible;
pset *live_nodes = pset_new_ptr_default();
- be_liveness_end_of_block(env->arch, env->cls, block, live_nodes);
- pressure = pset_count(live_nodes);
+ be_liveness_end_of_block(env->cenv->lv, env->arch, env->cls, block, live_nodes);
+ max_pressure = pset_count(live_nodes);
DBG((dbg, DBG_LIVE, "Reduce pressure to %d In Block %+F:\n", env->registers_available, block));
/**
- * Walk over all irns in the schedule and check register pressure for each of them
+ * Determine register pressure in block
*/
- sched_foreach_reverse(block, irn) {
- // do we need more spills than possible with unused libethroughs?
- int spills_needed = pressure - env->registers_available - unused_spills_possible;
- if(spills_needed > 0) {
- DBG((dbg, DBG_PRESSURE, "\tWARNING %d more spills needed at %+F\n", spills_needed, irn));
- // TODO further spills needed
- //assert(0);
- }
- if(pressure > max_pressure) {
- max_pressure = pressure;
- }
+ sched_foreach_reverse(block, node) {
+ int pressure;
- /* Register pressure is only important until we reach the first phi (the rest of the block
- * will only be phis.)
- */
- if(is_Phi(irn))
+ if(is_Phi(node))
break;
- // update pressure
- be_liveness_transfer(env->arch, env->cls, irn, live_nodes);
+ be_liveness_transfer(env->arch, env->cls, node, live_nodes);
pressure = pset_count(live_nodes);
+ if(pressure > max_pressure)
+ max_pressure = pressure;
}
+ del_pset(live_nodes);
DBG((dbg, DBG_PRESSURE, "\tMax Pressure in %+F: %d\n", block, max_pressure));
- /*
- * Calculate number of spills from loop_unused_spills_possible that we want to use,
- * and spill unused livethroughs from the block if we still don't have enough registers
- */
- spills_needed = max_pressure - env->registers_available;
- if(spills_needed < 0) {
- loop_unused_spills_needed = 0;
- } else if(spills_needed > loop_unused_spills_possible) {
- int i, spills;
- int block_unused_spills_needed;
+ loop_unused_spills_needed = max_pressure - env->registers_available;
+ if(loop_unused_spills_needed < 0) {
+ loop_unused_spills_needed = 0;
+ } else if(loop_unused_spills_needed > loop_unused_spills_possible) {
loop_unused_spills_needed = loop_unused_spills_possible;
- block_unused_spills_needed = spills_needed - loop_unused_spills_possible;
- if(block_unused_spills_needed > block_unused_spills_possible) {
- block_unused_spills_needed = block_unused_spills_possible;
- }
-
- spills = 0;
- /*
- * Spill/Reload unused livethroughs from the block
- */
- bitset_foreach(block_attr->livethrough_unused, i) {
- ir_node *to_spill;
- const ir_edge_t *edge;
-
- if(spills >= block_unused_spills_needed)
- break;
-
- to_spill = get_idx_irn(env->irg, i);
- foreach_block_succ(block, edge) {
- DBG((dbg, DBG_PRESSURE, "Spilling node %+F around block %+F\n", to_spill, block));
- be_add_reload_on_edge(env->senv, to_spill, edge->src, edge->pos);
- }
- spills++;
- }
- } else {
- loop_unused_spills_needed = spills_needed;
}
- del_pset(live_nodes);
-
DBG((dbg, DBG_PRESSURE, "Unused spills for Block %+F needed: %d\n", block, loop_unused_spills_needed));
return loop_unused_spills_needed;
}
int needed;
assert(is_Block(elem.node));
needed = reduce_register_pressure_in_block(env, elem.node, spills_possible);
+ assert(needed >= 0);
assert(needed <= spills_possible);
if(needed > spills_needed)
spills_needed = needed;
}
case k_ir_loop: {
int needed = reduce_register_pressure_in_loop(env, elem.son, spills_possible);
+ assert(needed >= 0);
assert(needed <= spills_possible);
if(needed > spills_needed)
spills_needed = needed;
return outer_spills_needed;
}
-void be_spill_morgan(const be_chordal_env_t *chordal_env) {
+void be_spill_morgan(be_chordal_env_t *chordal_env) {
morgan_env_t env;
FIRM_DBG_REGISTER(dbg, "ir.be.spillmorgan");
//firm_dbg_set_mask(dbg, DBG_LOOPANA | DBG_PRESSURE);
+ env.cenv = chordal_env;
env.arch = chordal_env->birg->main_env->arch_env;
env.irg = chordal_env->irg;
env.cls = chordal_env->cls;
obstack_init(&env.obst);
- env.registers_available = arch_count_non_ignore_regs(env.arch, env.cls);
+ env.registers_available = env.cls->n_regs - be_put_ignore_regs(chordal_env->birg, env.cls, NULL);
env.loop_attr_set = new_set(loop_attr_cmp, 5);
env.block_attr_set = new_set(block_attr_cmp, 20);
/*-- Part1: Analysis --*/
- be_liveness(env.irg);
+ be_liveness_recompute(chordal_env->lv);
/* construct control flow loop tree */
construct_cf_backedges(chordal_env->irg);
*/
reduce_register_pressure_in_loop(&env, get_irg_loop(env.irg), 0);
- /* Place copies for spilled phis */
- be_place_copies(env.senv);
/* Insert real spill/reload nodes and fix usages */
be_insert_spills_reloads(env.senv);
del_set(env.block_attr_set);
/* fix the remaining places with too high register pressure with beladies algorithm */
-
- /* we have to remove dead nodes from schedule to not confuse liveness calculation */
- be_remove_dead_nodes_from_schedule(env.irg);
- be_liveness(env.irg);
-
be_spill_belady_spill_env(chordal_env, env.senv);
be_delete_spill_env(env.senv);