#include <lpp/lpp_net.h>
#include <lpp/lpp_cplex.h>
//#include <lc_pset.h>
-#include <libcore/lc_bitset.h>
+//#include <libcore/lc_bitset.h>
#include "be_t.h"
#include "belive_t.h"
#include "besched_t.h"
#include "beirgmod.h"
#include "bearch.h"
+#include "beabi.h"
#include "benode_t.h"
#include "beutil.h"
#include "bespillremat.h"
}
}
+int
+can_be_copied(const ir_node * bb, const ir_node * irn)
+{
+ assert(is_merge_edge(bb));
+
+ const ir_edge_t *edge = get_block_succ_first(bb);
+ const ir_node *next_bb = edge->src;
+ int pos = edge->pos;
+ const ir_node *phi;
+
+ sched_foreach(next_bb, phi) {
+ const ir_node *phi_arg;
+
+ if(!is_Phi(phi)) break;
+
+ phi_arg = get_irn_n(phi, pos);
+
+ if(phi_arg == irn) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
/**
* Preparation of blocks' ends for Luke Blockwalker(tm)(R)
*/
ilp_cst_t rel_cst;
ir_snprintf(buf, sizeof(buf), "reload_%N_%N", bb, irn);
- reload = lpp_add_var_default(si->lpp, buf, lpp_binary, opt_cost_reload*execution_frequency(si, bb), 1.0);
+ reload = lpp_add_var_default(si->lpp, buf, lpp_binary, opt_cost_reload*execution_frequency(si, bb), can_be_copied(bb, irn));
set_insert_keyval(spill_bb->reloads, irn, INT_TO_PTR(reload));
/* reload <= mem_out */
lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -1.0);
}
}
- /* maybe we should also assure that reg_out >= live_range etc. */
- }
-
- if(opt_memcopies)
- insert_mem_copy_position(si, live, bb);
-
- /* allow only one argument to die at pre remat. If two value die check_pre does
- * not ensure a correct register pressure FIXME (verify this is really necessary!) */
- foreach_pre_remat(si, bb, tmp) {
- pset *remat_args = pset_new_ptr(get_irn_arity(tmp));
- int n;
- ir_node *remat_arg;
- op_t *remat_op = get_irn_link(tmp);
-
- for(n=get_irn_arity(tmp)-1; n>=0; --n) {
- remat_arg = get_irn_n(tmp, n);
+ ir_snprintf(buf, sizeof(buf), "reg_out2_%N_%N", bb, irn);
+ cst = lpp_add_cst_uniq(si->lpp, buf, lpp_greater, 0.0);
- if(has_reg_class(si, remat_arg)) {
- pset_insert_ptr(remat_args, remat_arg);
+ /* value may only die at bb end if it is used for a mem copy */
+ /* reg_out + \sum copy - reload - remat - live_range >= 0 */
+ lpp_set_factor_fast(si->lpp, cst, spill->reg_out, 1.0);
+ if(reload != ILP_UNDEF) lpp_set_factor_fast(si->lpp, cst, reload, -1.0);
+ lpp_set_factor_fast(si->lpp, cst, op->attr.live_range.ilp, -1.0);
+ foreach_pre_remat(si, bb, tmp) {
+ op_t *remat_op = get_irn_link(tmp);
+ if(remat_op->attr.remat.remat->value == irn) {
+ lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -1.0);
}
}
+ if(is_merge_edge(bb)) {
+ const ir_edge_t *edge = get_block_succ_first(bb);
+ const ir_node *next_bb = edge->src;
+ int pos = edge->pos;
+ const ir_node *phi;
+
+ sched_foreach(next_bb, phi) {
+ const ir_node *phi_arg;
+
+ if(!is_Phi(phi)) break;
- if(pset_count(remat_args)) {
- /* \sum_args reg_out >= #args * remat - 1 */
- ir_snprintf(buf, sizeof(buf), "one_may_die_%N", tmp);
- cst = lpp_add_cst_uniq(si->lpp, buf, lpp_greater, -1.0);
- lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -pset_count(remat_args));
+ phi_arg = get_irn_n(phi, pos);
- pset_foreach(remat_args, remat_arg) {
- spill = set_find_spill(spill_bb->ilp, remat_arg);
+ if(phi_arg == irn) {
+ op_t *phi_op = get_irn_link(phi);
+ ilp_var_t copy = phi_op->attr.live_range.args.copies[pos];
- if(spill) {
- lpp_set_factor_fast(si->lpp, cst, spill->reg_out, 1.0);
+ lpp_set_factor_fast(si->lpp, cst, copy, 1.0);
}
}
}
-
- del_pset(remat_args);
}
+ if(opt_memcopies)
+ insert_mem_copy_position(si, live, bb);
+
/*
* start new live ranges for values used by remats at end of block
* and assure the remat args are available
}
}
- /* allow only one argument to die at pre remat. If two value die check_pre does
- * not ensure a correct register pressure FIXME (verify this is really necessary!) */
- foreach_pre_remat(si, irn, tmp) {
- pset *remat_args = pset_new_ptr(get_irn_arity(tmp));
- int n;
- ir_node *remat_arg;
- op_t *remat_op = get_irn_link(tmp);
-
- for(n=get_irn_arity(tmp)-1; n>=0; --n) {
- remat_arg = get_irn_n(tmp, n);
-
- if(has_reg_class(si, remat_arg)) {
- pset_insert_ptr(remat_args, remat_arg);
- }
- }
-
- if(pset_count(remat_args)) {
- /* \sum_args next(lr) >= #args * remat - 1 */
- ir_snprintf(buf, sizeof(buf), "one_may_die_%N", tmp);
- cst = lpp_add_cst_uniq(si->lpp, buf, lpp_greater, -1.0);
- lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -pset_count(remat_args));
-
- pset_foreach(remat_args, remat_arg) {
- op_t *arg_op = get_irn_link(remat_arg);
-
- if(arg_op->attr.live_range.ilp != ILP_UNDEF) {
- lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, 1.0);
- }
- }
- }
-
- del_pset(remat_args);
- }
-
/***********************************************************
* I T E R A T I O N O V E R U S E S F O R E P I L O G
**********************************************************/
static void
walker_collect_used(ir_node * irn, void * data)
{
- lc_bitset_t *used = data;
+ bitset_t *used = data;
- lc_bitset_set(used, get_irn_idx(irn));
+ bitset_set(used, get_irn_idx(irn));
}
struct kill_helper {
- lc_bitset_t *used;
+ bitset_t *used;
spill_ilp_t *si;
};
ir_node *next = sched_next(irn);
int n;
- if(!lc_bitset_is_set(kh->used, get_irn_idx(irn))) {
+ if(!bitset_is_set(kh->used, get_irn_idx(irn))) {
if(be_is_Spill(irn) || be_is_Reload(irn)) {
DBG((kh->si->dbg, LEVEL_1, "\t SUBOPTIMAL! %+F IS UNUSED (cost: %g)\n", irn, get_cost(kh->si, irn)*execution_frequency(kh->si, bb)));
#if 0
{
struct kill_helper kh;
- kh.used = lc_bitset_malloc(get_irg_last_idx(si->chordal_env->irg));
+ kh.used = bitset_malloc(get_irg_last_idx(si->chordal_env->irg));
kh.si = si;
irg_walk_graph(si->chordal_env->irg, walker_collect_used, NULL, kh.used);
irg_block_walk_graph(si->chordal_env->irg, walker_kill_unused, NULL, &kh);
- lc_bitset_free(kh.used);
+ bitset_free(kh.used);
}
void
static int
get_n_regs(spill_ilp_t * si)
{
- int arch_n_regs = arch_register_class_n_regs(si->cls);
- int free = 0;
- int i;
+ int arch_n_regs = arch_register_class_n_regs(si->cls);
- for(i=0; i<arch_n_regs; i++) {
- if(!arch_register_type_is(&si->cls->regs[i], ignore)) {
- free++;
- }
- }
+ bitset_t *arch_regs = bitset_malloc(arch_n_regs);
+ bitset_t *abi_regs = bitset_malloc(arch_n_regs);
+
+ arch_put_non_ignore_regs(si->chordal_env->birg->main_env->arch_env, si->cls, arch_regs);
+ be_abi_put_ignore_regs(si->chordal_env->birg->abi, si->cls, abi_regs);
+
+ bitset_andnot(arch_regs, abi_regs);
+ arch_n_regs = bitset_popcnt(arch_regs);
+
+ bitset_free(arch_regs);
+ bitset_free(abi_regs);
- DBG((si->dbg, LEVEL_1, "\tArchitecture has %d free registers in class %s\n", free, si->cls->name));
- return free;
+ DBG((si->dbg, LEVEL_1, "\tArchitecture has %d free registers in class %s\n", arch_n_regs, si->cls->name));
+ return arch_n_regs;
}
static void
projects / libfirm / blobdiff