1 /** vim: set sw=4 ts=4:
4 * @author Adam M. Szalkowski & Sebastian Hack
6 * ILP based spilling & rematerialization
8 * Copyright (C) 2006 Universitaet Karlsruhe
9 * Released under the GPL
32 #include "phiclass_t.h"
38 #include <lpp/lpp_net.h>
39 #include <lpp/lpp_cplex.h>
40 //#include <lc_pset.h>
41 #include <libcore/lc_bitset.h>
45 #include "besched_t.h"
50 #include "bespillremat.h"
52 #include "bepressurestat.h"
54 #include "bechordal_t.h"
60 //#define KEEPALIVE /* keep alive all inserted remats and dump graph with remats */
61 #define COLLECT_REMATS /* enable rematerialization */
62 #define COLLECT_INVERSE_REMATS /* enable placement of inverse remats */
63 #define REMAT_WHILE_LIVE /* only remat values that are live */
64 //#define NO_ENLARGE_L1V3N355 /* do not remat after the death of some operand */
65 //#define EXECFREQ_LOOPDEPH /* compute execution frequency from loop depth only */
66 #define MAY_DIE_AT_REMAT /* allow values to die after a pre remat */
67 #define NO_SINGLE_USE_REMATS /* do not repair schedule */
68 //#define KEEPALIVE_SPILLS
69 //#define KEEPALIVE_RELOADS
70 #define GOODWIN_REDUCTION
71 //#define NO_MEMCOPIES
72 //#define VERIFY_DOMINANCE
73 #define WITH_MEMOPERANDS
77 #define LPP_SERVER "i44pc52"
78 #define LPP_SOLVER "cplex"
81 #define COST_MEMOPERAND 7
85 #define ILP_TIMEOUT 300
89 typedef struct _spill_ilp_t {
90 const arch_register_class_t *cls;
92 const be_chordal_env_t *chordal_env;
97 pset *all_possible_remats;
102 set *values; /**< for collecting all definitions of values before running ssa-construction */
106 #ifdef WITH_MEMOPERANDS
109 DEBUG_ONLY(firm_dbg_module_t * dbg);
112 typedef int ilp_var_t;
113 typedef int ilp_cst_t;
115 typedef struct _spill_bb_t {
120 typedef struct _remat_t {
121 const ir_node *op; /**< for copy_irn */
122 const ir_node *value; /**< the value which is being recomputed by this remat */
123 const ir_node *proj; /**< not NULL if the above op produces a tuple */
124 int cost; /**< cost of this remat */
125 int inverse; /**< nonzero if this is an inverse remat */
129 * Data to be attached to each IR node. For remats this contains the ilp_var
130 * for this remat and for normal ops this contains the ilp_vars for
131 * reloading each operand
133 typedef struct _op_t {
138 const remat_t *remat; /** the remat this op belongs to */
139 int pre; /** 1, if this is a pressure-increasing remat */
143 ir_node *op; /** the operation this live range belongs to */
152 typedef struct _defs_t {
153 const ir_node *value;
154 ir_node *spills; /**< points to the first spill for this value (linked by link field) */
155 ir_node *remats; /**< points to the first definition for this value (linked by link field) */
158 typedef struct _remat_info_t {
159 const ir_node *irn; /**< the irn to which these remats belong */
160 pset *remats; /**< possible remats for this value */
161 pset *remats_by_operand; /**< remats with this value as operand */
164 typedef struct _keyval_t {
169 typedef struct _spill_t {
178 #ifdef WITH_MEMOPERANDS
179 typedef struct _memoperand_t {
180 ir_node *irn; /**< the irn */
181 unsigned int pos; /**< the position of the argument */
182 ilp_var_t ilp; /**< the ilp var for this memory operand */
187 has_reg_class(const spill_ilp_t * si, const ir_node * irn)
189 return chordal_has_class(si->chordal_env, irn);
194 cmp_remat(const void *a, const void *b)
196 const keyval_t *p = a;
197 const keyval_t *q = b;
198 const remat_t *r = p->val;
199 const remat_t *s = q->val;
203 return !(r == s || r->op == s->op);
207 cmp_remat(const void *a, const void *b)
209 const remat_t *r = a;
210 const remat_t *s = a;
212 return !(r == s || r->op == s->op);
216 cmp_spill(const void *a, const void *b, size_t size)
218 const spill_t *p = a;
219 const spill_t *q = b;
221 // return !(p->irn == q->irn && p->bb == q->bb);
222 return !(p->irn == q->irn);
225 #ifdef WITH_MEMOPERANDS
227 cmp_memoperands(const void *a, const void *b, size_t size)
229 const memoperand_t *p = a;
230 const memoperand_t *q = b;
232 return !(p->irn == q->irn && p->pos == q->pos);
237 set_find_keyval(set * set, const void * key)
242 return set_find(set, &query, sizeof(query), HASH_PTR(key));
246 set_insert_keyval(set * set, void * key, void * val)
252 return set_insert(set, &query, sizeof(query), HASH_PTR(key));
256 set_find_def(set * set, const ir_node * value)
261 return set_find(set, &query, sizeof(query), HASH_PTR(value));
265 set_insert_def(set * set, const ir_node * value)
272 return set_insert(set, &query, sizeof(query), HASH_PTR(value));
275 #ifdef WITH_MEMOPERANDS
276 static memoperand_t *
277 set_insert_memoperand(set * set, ir_node * irn, unsigned int pos, ilp_var_t ilp)
284 return set_insert(set, &query, sizeof(query), HASH_PTR(irn)+pos);
287 static memoperand_t *
288 set_find_memoperand(set * set, const ir_node * irn, unsigned int pos)
292 query.irn = (ir_node*)irn;
294 return set_find(set, &query, sizeof(query), HASH_PTR(irn)+pos);
300 set_find_spill(set * set, const ir_node * value)
304 query.irn = (ir_node*)value;
305 return set_find(set, &query, sizeof(query), HASH_PTR(value));
308 #define pset_foreach(s,i) for((i)=pset_first((s)); (i); (i)=pset_next((s)))
309 #define set_foreach(s,i) for((i)=set_first((s)); (i); (i)=set_next((s)))
310 #define foreach_post_remat(s,i) for((i)=next_post_remat((s)); (i); (i)=next_post_remat((i)))
311 #define foreach_pre_remat(si,s,i) for((i)=next_pre_remat((si),(s)); (i); (i)=next_pre_remat((si),(i)))
312 #define sched_foreach_op(s,i) for((i)=sched_next_op((s));!sched_is_end((i));(i)=sched_next_op((i)))
315 cmp_remat_info(const void *a, const void *b, size_t size)
317 const remat_info_t *p = a;
318 const remat_info_t *q = b;
320 return !(p->irn == q->irn);
324 cmp_defs(const void *a, const void *b, size_t size)
329 return !(p->value == q->value);
333 cmp_keyval(const void *a, const void *b, size_t size)
335 const keyval_t *p = a;
336 const keyval_t *q = b;
338 return !(p->key == q->key);
342 execution_frequency(const spill_ilp_t *si, const ir_node * irn)
345 #ifndef EXECFREQ_LOOPDEPH
346 return get_block_execfreq(si->chordal_env->exec_freq, get_block(irn)) + FUDGE;
349 return exp(get_loop_depth(get_irn_loop(irn)) * log(10)) + FUDGE;
351 return exp(get_loop_depth(get_irn_loop(get_nodes_block(irn))) * log(10)) + FUDGE;
356 get_cost(const spill_ilp_t * si, const ir_node * irn)
358 if(be_is_Spill(irn)) {
360 } else if(be_is_Reload(irn)){
363 return arch_get_op_estimated_cost(si->chordal_env->birg->main_env->arch_env, irn);
368 * Checks, whether node and its operands have suitable reg classes
371 is_rematerializable(const spill_ilp_t * si, const ir_node * irn)
374 const arch_env_t *arch_env = si->chordal_env->birg->main_env->arch_env;
375 int remat = (arch_irn_get_flags(arch_env, irn) & arch_irn_flags_rematerializable) != 0;
379 ir_fprintf(stderr, " Node %+F is not rematerializable\n", irn);
382 for (n = get_irn_arity(irn)-1; n>=0 && remat; --n) {
383 ir_node *op = get_irn_n(irn, n);
384 remat &= has_reg_class(si, op) || arch_irn_get_flags(arch_env, op) & arch_irn_flags_ignore || (get_irn_op(op) == op_NoMem);
387 // ir_fprintf(stderr, " Argument %d (%+F) of Node %+F has wrong regclass\n", i, op, irn);
394 * Try to create a remat from @p op with destination value @p dest_value
396 static INLINE remat_t *
397 get_remat_from_op(spill_ilp_t * si, const ir_node * dest_value, const ir_node * op)
399 remat_t *remat = NULL;
401 // if(!mode_is_datab(get_irn_mode(dest_value)))
404 if(dest_value == op) {
405 const ir_node *proj = NULL;
407 if(is_Proj(dest_value)) {
408 op = get_irn_n(op, 0);
412 if(!is_rematerializable(si, op))
415 remat = obstack_alloc(si->obst, sizeof(*remat));
417 remat->cost = get_cost(si, op);
418 remat->value = dest_value;
422 arch_inverse_t inverse;
425 /* get the index of the operand we want to retrieve by the inverse op */
426 for (n = get_irn_arity(op)-1; n>=0; --n) {
427 ir_node *arg = get_irn_n(op, n);
429 if(arg == dest_value) break;
433 DBG((si->dbg, LEVEL_5, "\t requesting inverse op for argument %d of op %+F\n", n, op));
435 /* else ask the backend to give an inverse op */
436 if(arch_get_inverse(si->chordal_env->birg->main_env->arch_env, op, n, &inverse, si->obst)) {
439 DBG((si->dbg, LEVEL_4, "\t backend gave us an inverse op with %d nodes and cost %d\n", inverse.n, inverse.costs));
441 assert(inverse.n > 0 && "inverse op should have at least one node");
443 for(i=inverse.n-1; i>=0; --i) {
444 pset_insert_ptr(si->inverse_ops, inverse.nodes[i]);
448 remat = obstack_alloc(si->obst, sizeof(*remat));
449 remat->op = inverse.nodes[0];
450 remat->cost = inverse.costs;
451 remat->value = dest_value;
452 remat->proj = (inverse.n==2)?inverse.nodes[1]:NULL;
455 assert(is_Proj(remat->proj));
457 assert(0 && "I can not handle remats with more than 2 nodes");
464 DBG((si->dbg, LEVEL_3, "\t >Found remat %+F for %+F from %+F with %+F\n", remat->op, dest_value, op, remat->proj));
466 DBG((si->dbg, LEVEL_3, "\t >Found remat %+F for %+F from %+F\n", remat->op, dest_value, op));
474 add_remat(const spill_ilp_t * si, const remat_t * remat)
476 remat_info_t *remat_info,
481 assert(remat->value);
483 query.irn = remat->value;
485 query.remats_by_operand = NULL;
486 remat_info = set_insert(si->remat_info, &query, sizeof(query), HASH_PTR(remat->value));
488 if(remat_info->remats == NULL) {
489 remat_info->remats = new_pset(cmp_remat, 4096);
491 pset_insert(remat_info->remats, remat, HASH_PTR(remat->op));
493 /* insert the remat into the remats_be_operand set of each argument of the remat op */
494 for (n = get_irn_arity(remat->op)-1; n>=0; --n) {
495 ir_node *arg = get_irn_n(remat->op, n);
499 query.remats_by_operand = NULL;
500 remat_info = set_insert(si->remat_info, &query, sizeof(query), HASH_PTR(arg));
502 if(remat_info->remats_by_operand == NULL) {
503 remat_info->remats_by_operand = new_pset(cmp_remat, 4096);
505 pset_insert(remat_info->remats_by_operand, remat, HASH_PTR(remat->op));
510 get_irn_n_nonremat_edges(const spill_ilp_t * si, const ir_node * irn)
512 const ir_edge_t *edge = get_irn_out_edge_first(irn);
516 if(!pset_find_ptr(si->inverse_ops, edge->src)) {
519 edge = get_irn_out_edge_next(irn, edge);
526 get_remats_from_op(spill_ilp_t * si, const ir_node * op)
531 #ifdef NO_SINGLE_USE_REMATS
532 if(has_reg_class(si, op) && (get_irn_n_nonremat_edges(si, op) > 1)) {
534 if(has_reg_class(si, op)) {
536 remat = get_remat_from_op(si, op, op);
538 add_remat(si, remat);
542 #ifdef COLLECT_INVERSE_REMATS
543 /* repeat the whole stuff for each remat retrieved by get_remat_from_op(op, arg)
545 for (n = get_irn_arity(op)-1; n>=0; --n) {
546 ir_node *arg = get_irn_n(op, n);
548 if(has_reg_class(si, arg)) {
549 /* try to get an inverse remat */
550 remat = get_remat_from_op(si, arg, op);
552 add_remat(si, remat);
561 value_is_defined_before(const spill_ilp_t * si, const ir_node * pos, const ir_node * val)
564 ir_node *def_block = get_nodes_block(val);
570 /* if pos is at end of a basic block */
572 ret = (pos == def_block || block_dominates(def_block, pos));
573 // ir_fprintf(stderr, "(def(bb)=%d) ", ret);
577 /* else if this is a normal operation */
578 block = get_nodes_block(pos);
579 if(block == def_block) {
580 if(!sched_is_scheduled(val)) return 1;
582 ret = sched_comes_after(val, pos);
583 // ir_fprintf(stderr, "(def(same block)=%d) ",ret);
587 ret = block_dominates(def_block, block);
588 // ir_fprintf(stderr, "(def(other block)=%d) ", ret);
592 static INLINE ir_node *
593 sched_block_last_noncf(const spill_ilp_t * si, const ir_node * bb)
595 return sched_skip((ir_node*)bb, 0, sched_skip_cf_predicator, (void *) si->chordal_env->birg->main_env->arch_env);
599 * Returns first non-Phi node of block @p bb
601 static INLINE ir_node *
602 sched_block_first_nonphi(const ir_node * bb)
604 return sched_skip((ir_node*)bb, 1, sched_skip_phi_predicator, NULL);
608 sched_skip_proj_predicator(const ir_node * irn, void * data)
610 return (is_Proj(irn));
613 static INLINE ir_node *
614 sched_next_nonproj(const ir_node * irn, int forward)
616 return sched_skip((ir_node*)irn, forward, sched_skip_proj_predicator, NULL);
620 * Returns next operation node (non-Proj) after @p irn
621 * or the basic block of this node
623 static INLINE ir_node *
624 sched_next_op(const ir_node * irn)
626 ir_node *next = sched_next(irn);
631 return sched_next_nonproj(next, 1);
635 * Returns previous operation node (non-Proj) before @p irn
636 * or the basic block of this node
638 static INLINE ir_node *
639 sched_prev_op(const ir_node * irn)
641 ir_node *prev = sched_prev(irn);
646 return sched_next_nonproj(prev, 0);
650 sched_put_after(ir_node * insert, ir_node * irn)
652 if(is_Block(insert)) {
653 insert = sched_block_first_nonphi(insert);
655 insert = sched_next_op(insert);
657 sched_add_before(insert, irn);
661 sched_put_before(const spill_ilp_t * si, ir_node * insert, ir_node * irn)
663 if(is_Block(insert)) {
664 insert = sched_block_last_noncf(si, insert);
666 insert = sched_next_nonproj(insert, 0);
667 insert = sched_prev(insert);
669 sched_add_after(insert, irn);
673 * Tells you whether a @p remat can be placed before the irn @p pos
676 can_remat_before(const spill_ilp_t * si, const remat_t * remat, const ir_node * pos, const pset * live)
678 const ir_node *op = remat->op;
684 prev = sched_block_last_noncf(si, pos);
685 prev = sched_next_nonproj(prev, 0);
687 prev = sched_prev_op(pos);
689 /* do not remat if the rematted value is defined immediately before this op */
690 if(prev == remat->op) {
695 /* this should be just fine, the following OP will be using this value, right? */
697 /* only remat AFTER the real definition of a value (?) */
698 if(!value_is_defined_before(si, pos, remat->value)) {
699 // ir_fprintf(stderr, "error(not defined)");
704 for(n=get_irn_arity(op)-1; n>=0 && res; --n) {
705 const ir_node *arg = get_irn_n(op, n);
707 #ifdef NO_ENLARGE_L1V3N355
708 if(has_reg_class(si, arg) && live) {
709 res &= pset_find_ptr(live, arg)?1:0;
711 res &= value_is_defined_before(si, pos, arg);
714 res &= value_is_defined_before(si, pos, arg);
722 * Tells you whether a @p remat can be placed after the irn @p pos
725 can_remat_after(const spill_ilp_t * si, const remat_t * remat, const ir_node * pos, const pset * live)
728 pos = sched_block_first_nonphi(pos);
730 pos = sched_next_op(pos);
733 /* only remat AFTER the real definition of a value (?) */
734 if(!value_is_defined_before(si, pos, remat->value)) {
738 return can_remat_before(si, remat, pos, live);
742 * Collect potetially rematerializable OPs
745 walker_remat_collector(ir_node * irn, void * data)
747 spill_ilp_t *si = data;
749 if(!is_Block(irn) && !is_Phi(irn)) {
750 DBG((si->dbg, LEVEL_4, "\t Processing %+F\n", irn));
751 get_remats_from_op(si, irn);
756 * Inserts a copy of @p irn before @p pos
759 insert_copy_before(const spill_ilp_t * si, const ir_node * irn, ir_node * pos)
764 bb = is_Block(pos)?pos:get_nodes_block(pos);
765 copy = exact_copy(irn);
767 _set_phi_class(copy, NULL);
768 set_nodes_block(copy, bb);
769 sched_put_before(si, pos, copy);
775 * Inserts a copy of @p irn after @p pos
778 insert_copy_after(const spill_ilp_t * si, const ir_node * irn, ir_node * pos)
783 bb = is_Block(pos)?pos:get_nodes_block(pos);
784 copy = exact_copy(irn);
786 _set_phi_class(copy, NULL);
787 set_nodes_block(copy, bb);
788 sched_put_after(pos, copy);
794 insert_remat_after(spill_ilp_t * si, const remat_t * remat, ir_node * pos, const pset * live)
798 if(can_remat_after(si, remat, pos, live)) {
803 DBG((si->dbg, LEVEL_3, "\t >inserting remat %+F\n", remat->op));
805 copy = insert_copy_after(si, remat->op, pos);
807 ir_snprintf(buf, sizeof(buf), "remat2_%N_%N", copy, pos);
808 op = obstack_alloc(si->obst, sizeof(*op));
810 op->attr.remat.remat = remat;
811 op->attr.remat.pre = 0;
812 op->attr.remat.ilp = lpp_add_var(si->lpp, buf, lpp_binary, remat->cost*execution_frequency(si, pos));
814 set_irn_link(copy, op);
815 pset_insert_ptr(si->all_possible_remats, copy);
817 proj_copy = insert_copy_after(si, remat->proj, copy);
818 set_irn_n(proj_copy, 0, copy);
819 set_irn_link(proj_copy, op);
820 pset_insert_ptr(si->all_possible_remats, proj_copy);
832 insert_remat_before(spill_ilp_t * si, const remat_t * remat, ir_node * pos, const pset * live)
836 if(can_remat_before(si, remat, pos, live)) {
841 DBG((si->dbg, LEVEL_3, "\t >inserting remat %+F\n", remat->op));
843 copy = insert_copy_before(si, remat->op, pos);
845 ir_snprintf(buf, sizeof(buf), "remat_%N_%N", copy, pos);
846 op = obstack_alloc(si->obst, sizeof(*op));
848 op->attr.remat.remat = remat;
849 op->attr.remat.pre = 1;
850 op->attr.remat.ilp = lpp_add_var(si->lpp, buf, lpp_binary, remat->cost*execution_frequency(si, pos));
852 set_irn_link(copy, op);
853 pset_insert_ptr(si->all_possible_remats, copy);
855 proj_copy = insert_copy_after(si, remat->proj, copy);
856 set_irn_n(proj_copy, 0, copy);
857 set_irn_link(proj_copy, op);
858 pset_insert_ptr(si->all_possible_remats, proj_copy);
870 get_block_n_succs(const ir_node *block) {
871 const ir_edge_t *edge;
873 assert(edges_activated(current_ir_graph));
875 edge = get_block_succ_first(block);
879 edge = get_block_succ_next(block, edge);
884 is_merge_edge(const ir_node * bb)
886 #ifdef GOODWIN_REDUCTION
887 return get_block_n_succs(bb) == 1;
894 is_diverge_edge(const ir_node * bb)
896 #ifdef GOODWIN_REDUCTION
897 return get_Block_n_cfgpreds(bb) == 1;
904 walker_regclass_copy_insertor(ir_node * irn, void * data)
906 spill_ilp_t *si = data;
908 if(is_Phi(irn) && has_reg_class(si, irn)) {
911 for(n=get_irn_arity(irn)-1; n>=0; --n) {
912 ir_node *phi_arg = get_irn_n(irn, n);
913 ir_node *bb = get_Block_cfgpred_block(get_nodes_block(irn), n);
915 if(!has_reg_class(si, phi_arg)) {
916 ir_node *copy = be_new_Copy(si->cls, si->chordal_env->irg, bb, phi_arg);
917 ir_node *pos = sched_block_last_noncf(si, bb);
918 op_t *op = obstack_alloc(si->obst, sizeof(*op));
920 DBG((si->dbg, LEVEL_2, "\t copy to my regclass for arg %+F of %+F\n", phi_arg, irn));
921 sched_add_after(pos, copy);
922 set_irn_n(irn, n, copy);
925 op->attr.live_range.args.reloads = NULL;
926 op->attr.live_range.ilp = ILP_UNDEF;
927 set_irn_link(copy, op);
935 * Insert (so far unused) remats into the irg to
936 * recompute the potential liveness of all values
939 walker_remat_insertor(ir_node * bb, void * data)
941 spill_ilp_t *si = data;
942 spill_bb_t *spill_bb;
945 pset *live = pset_new_ptr_default();
947 DBG((si->dbg, LEVEL_3, "\t Entering %+F\n\n", bb));
949 be_lv_foreach(si->lv, bb, be_lv_state_end, i) {
950 ir_node *value = be_lv_get_irn(si->lv, bb, i);
952 /* add remats at end of block */
953 if (has_reg_class(si, value)) {
954 pset_insert_ptr(live, value);
958 spill_bb = obstack_alloc(si->obst, sizeof(*spill_bb));
959 set_irn_link(bb, spill_bb);
961 irn = sched_last(bb);
962 while(!sched_is_end(irn)) {
969 next = sched_prev(irn);
971 DBG((si->dbg, LEVEL_5, "\t at %+F (next: %+F)\n", irn, next));
973 if(is_Phi(irn) || is_Proj(irn)) {
976 if(has_reg_class(si, irn)) {
977 pset_remove_ptr(live, irn);
980 op = obstack_alloc(si->obst, sizeof(*op));
982 op->attr.live_range.args.reloads = NULL;
983 op->attr.live_range.ilp = ILP_UNDEF;
984 set_irn_link(irn, op);
990 op = obstack_alloc(si->obst, sizeof(*op));
992 op->attr.live_range.ilp = ILP_UNDEF;
993 op->attr.live_range.args.reloads = obstack_alloc(si->obst, sizeof(*op->attr.live_range.args.reloads) * get_irn_arity(irn));
994 memset(op->attr.live_range.args.reloads, 0xFF, sizeof(*op->attr.live_range.args.reloads) * get_irn_arity(irn));
995 set_irn_link(irn, op);
997 args = pset_new_ptr_default();
999 /* collect arguments of op */
1000 for (n = get_irn_arity(irn)-1; n>=0; --n) {
1001 ir_node *arg = get_irn_n(irn, n);
1003 pset_insert_ptr(args, arg);
1006 /* set args of op already live in epilog */
1007 pset_foreach(args, arg) {
1008 if(has_reg_class(si, arg)) {
1009 pset_insert_ptr(live, arg);
1012 /* delete defined value from live set */
1013 if(has_reg_class(si, irn)) {
1014 pset_remove_ptr(live, irn);
1018 remat_args = pset_new_ptr_default();
1020 /* insert all possible remats before irn */
1021 pset_foreach(args, arg) {
1022 remat_info_t *remat_info,
1026 /* continue if the operand has the wrong reg class
1028 if(!has_reg_class(si, arg))
1032 query.remats = NULL;
1033 query.remats_by_operand = NULL;
1034 remat_info = set_find(si->remat_info, &query, sizeof(query), HASH_PTR(arg));
1040 if(remat_info->remats) {
1041 pset_foreach(remat_info->remats, remat) {
1042 ir_node *remat_irn = NULL;
1044 DBG((si->dbg, LEVEL_4, "\t considering remat %+F for arg %+F\n", remat->op, arg));
1045 #ifdef REMAT_WHILE_LIVE
1046 if(pset_find_ptr(live, remat->value)) {
1047 remat_irn = insert_remat_before(si, remat, irn, live);
1050 remat_irn = insert_remat_before(si, remat, irn, live);
1053 for(n=get_irn_arity(remat_irn)-1; n>=0; --n) {
1054 ir_node *remat_arg = get_irn_n(remat_irn, n);
1056 if(!has_reg_class(si, remat_arg)) continue;
1058 pset_insert_ptr(remat_args, remat_arg);
1065 /* now we add remat args to op's args because they could also die at this op */
1066 pset_foreach(args,arg) {
1067 if(pset_find_ptr(remat_args, arg)) {
1068 pset_remove_ptr(remat_args, arg);
1071 pset_foreach(remat_args,arg) {
1072 pset_insert_ptr(args, arg);
1075 /* insert all possible remats after irn */
1076 pset_foreach(args, arg) {
1077 remat_info_t *remat_info,
1081 /* continue if the operand has the wrong reg class */
1082 if(!has_reg_class(si, arg))
1086 query.remats = NULL;
1087 query.remats_by_operand = NULL;
1088 remat_info = set_find(si->remat_info, &query, sizeof(query), HASH_PTR(arg));
1094 /* do not place post remats after jumps */
1095 if(sched_skip_cf_predicator(irn, si->chordal_env->birg->main_env->arch_env)) continue;
1097 if(remat_info->remats_by_operand) {
1098 pset_foreach(remat_info->remats_by_operand, remat) {
1099 /* do not insert remats producing the same value as one of the operands */
1100 if(!pset_find_ptr(args, remat->value)) {
1101 DBG((si->dbg, LEVEL_4, "\t considering remat %+F with arg %+F\n", remat->op, arg));
1102 #ifdef REMAT_WHILE_LIVE
1103 if(pset_find_ptr(live, remat->value)) {
1104 insert_remat_after(si, remat, irn, live);
1107 insert_remat_after(si, remat, irn, live);
1114 del_pset(remat_args);
1119 be_lv_foreach(si->lv, bb, be_lv_state_end | be_lv_state_in, i) {
1120 ir_node *value = be_lv_get_irn(si->lv, bb, i);
1122 /* add remats at end if successor has multiple predecessors */
1123 if(is_merge_edge(bb)) {
1124 /* add remats at end of block */
1125 if (be_is_live_end(si->lv, bb, value) && has_reg_class(si, value)) {
1126 remat_info_t *remat_info,
1131 query.remats = NULL;
1132 query.remats_by_operand = NULL;
1133 remat_info = set_find(si->remat_info, &query, sizeof(query), HASH_PTR(value));
1135 if(remat_info && remat_info->remats) {
1136 pset_foreach(remat_info->remats, remat) {
1137 DBG((si->dbg, LEVEL_4, "\t considering remat %+F at end of block %+F\n", remat->op, bb));
1139 insert_remat_before(si, remat, bb, NULL);
1144 if(is_diverge_edge(bb)) {
1145 /* add remat2s at beginning of block */
1146 if ((be_is_live_in(si->lv, bb, value) || (is_Phi(value) && get_nodes_block(value)==bb)) && has_reg_class(si, value)) {
1147 remat_info_t *remat_info,
1152 query.remats = NULL;
1153 query.remats_by_operand = NULL;
1154 remat_info = set_find(si->remat_info, &query, sizeof(query), HASH_PTR(value));
1156 if(remat_info && remat_info->remats) {
1157 pset_foreach(remat_info->remats, remat) {
1158 DBG((si->dbg, LEVEL_4, "\t considering remat %+F at beginning of block %+F\n", remat->op, bb));
1160 /* put the remat here if all its args are available */
1161 insert_remat_after(si, remat, bb, NULL);
1171 * Preparation of blocks' ends for Luke Blockwalker(tm)(R)
1174 luke_endwalker(ir_node * bb, void * data)
1176 spill_ilp_t *si = (spill_ilp_t*)data;
1182 spill_bb_t *spill_bb = get_irn_link(bb);
1186 live = pset_new_ptr_default();
1187 use_end = pset_new_ptr_default();
1189 be_lv_foreach(si->lv, bb, be_lv_state_end, i) {
1190 irn = be_lv_get_irn(si->lv, bb, i);
1191 if (has_reg_class(si, irn) && !pset_find_ptr(si->all_possible_remats, irn)) {
1194 pset_insert_ptr(live, irn);
1195 op = get_irn_link(irn);
1196 assert(!op->is_remat);
1200 /* collect values used by cond jumps etc. at bb end (use_end) -> always live */
1201 /* their reg_out must always be set */
1202 sched_foreach_reverse(bb, irn) {
1205 if(!sched_skip_cf_predicator(irn, si->chordal_env->birg->main_env->arch_env)) break;
1207 for (n=get_irn_arity(irn)-1; n>=0; --n) {
1208 ir_node *irn_arg = get_irn_n(irn, n);
1210 if(has_reg_class(si, irn_arg)) {
1211 pset_insert_ptr(use_end, irn_arg);
1216 ir_snprintf(buf, sizeof(buf), "check_end_%N", bb);
1217 //cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, si->n_regs);
1218 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, si->n_regs - pset_count(use_end));
1220 spill_bb->ilp = new_set(cmp_spill, pset_count(live)+pset_count(use_end));
1222 /* if this is a merge edge we can reload at the end of this block */
1223 if(is_merge_edge(bb)) {
1224 spill_bb->reloads = new_set(cmp_keyval, pset_count(live)+pset_count(use_end));
1225 } else if(pset_count(use_end)){
1226 spill_bb->reloads = new_set(cmp_keyval, pset_count(use_end));
1228 spill_bb->reloads = NULL;
1231 pset_foreach(live,irn) {
1237 /* handle values used by control flow nodes later separately */
1238 if(pset_find_ptr(use_end, irn)) continue;
1241 spill = set_insert(spill_bb->ilp, &query, sizeof(query), HASH_PTR(irn));
1243 spill_cost = is_Unknown(irn)?0.0001:COST_STORE*execution_frequency(si, bb);
1245 ir_snprintf(buf, sizeof(buf), "reg_out_%N_%N", irn, bb);
1246 spill->reg_out = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1247 lpp_set_factor_fast(si->lpp, cst, spill->reg_out, 1.0);
1249 ir_snprintf(buf, sizeof(buf), "mem_out_%N_%N", irn, bb);
1250 spill->mem_out = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1252 ir_snprintf(buf, sizeof(buf), "spill_%N_%N", irn, bb);
1253 spill->spill = lpp_add_var(si->lpp, buf, lpp_binary, spill_cost);
1255 if(is_merge_edge(bb)) {
1259 ir_snprintf(buf, sizeof(buf), "reload_%N_%N", bb, irn);
1260 reload = lpp_add_var(si->lpp, buf, lpp_binary, COST_LOAD*execution_frequency(si, bb));
1261 set_insert_keyval(spill_bb->reloads, irn, INT_TO_PTR(reload));
1263 /* reload <= mem_out */
1264 rel_cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1265 lpp_set_factor_fast(si->lpp, rel_cst, reload, 1.0);
1266 lpp_set_factor_fast(si->lpp, rel_cst, spill->mem_out, -1.0);
1269 spill->reg_in = ILP_UNDEF;
1270 spill->mem_in = ILP_UNDEF;
1273 pset_foreach(use_end,irn) {
1277 ilp_cst_t end_use_req,
1282 spill = set_insert(spill_bb->ilp, &query, sizeof(query), HASH_PTR(irn));
1284 spill_cost = is_Unknown(irn)?0.0001:COST_STORE*execution_frequency(si, bb);
1286 ir_snprintf(buf, sizeof(buf), "reg_out_%N_%N", irn, bb);
1287 spill->reg_out = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1288 /* if irn is used at the end of the block, then it is live anyway */
1289 //lpp_set_factor_fast(si->lpp, cst, spill->reg_out, 1.0);
1291 ir_snprintf(buf, sizeof(buf), "mem_out_%N_%N", irn, bb);
1292 spill->mem_out = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1294 ir_snprintf(buf, sizeof(buf), "spill_%N_%N", irn, bb);
1295 spill->spill = lpp_add_var(si->lpp, buf, lpp_binary, spill_cost);
1297 ir_snprintf(buf, sizeof(buf), "reload_%N_%N", bb, irn);
1298 reload = lpp_add_var(si->lpp, buf, lpp_binary, COST_LOAD*execution_frequency(si, bb));
1299 set_insert_keyval(spill_bb->reloads, irn, INT_TO_PTR(reload));
1301 /* reload <= mem_out */
1302 rel_cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1303 lpp_set_factor_fast(si->lpp, rel_cst, reload, 1.0);
1304 lpp_set_factor_fast(si->lpp, rel_cst, spill->mem_out, -1.0);
1306 spill->reg_in = ILP_UNDEF;
1307 spill->mem_in = ILP_UNDEF;
1309 ir_snprintf(buf, sizeof(buf), "req_cf_end_%N_%N", irn, bb);
1310 end_use_req = lpp_add_cst_uniq(si->lpp, buf, lpp_equal, 1);
1311 lpp_set_factor_fast(si->lpp, end_use_req, spill->reg_out, 1.0);
1319 next_post_remat(const ir_node * irn)
1325 next = sched_block_first_nonphi(irn);
1327 next = sched_next_op(irn);
1330 if(sched_is_end(next))
1333 op = get_irn_link(next);
1334 if(op->is_remat && !op->attr.remat.pre) {
1343 next_pre_remat(const spill_ilp_t * si, const ir_node * irn)
1349 ret = sched_block_last_noncf(si, irn);
1350 ret = sched_next(ret);
1351 ret = sched_prev_op(ret);
1353 ret = sched_prev_op(irn);
1356 if(sched_is_end(ret) || is_Phi(ret))
1359 op = (op_t*)get_irn_link(ret);
1360 if(op->is_remat && op->attr.remat.pre) {
1368 * Find a remat of value @p value in the epilog of @p pos
1371 find_post_remat(const ir_node * value, const ir_node * pos)
1373 while((pos = next_post_remat(pos)) != NULL) {
1376 op = get_irn_link(pos);
1377 assert(op->is_remat && !op->attr.remat.pre);
1379 if(op->attr.remat.remat->value == value)
1380 return (ir_node*)pos;
1383 const ir_edge_t *edge;
1384 foreach_out_edge(pos, edge) {
1385 ir_node *proj = get_edge_src_irn(edge);
1386 assert(is_Proj(proj));
1396 add_to_spill_bb(spill_ilp_t * si, ir_node * bb, ir_node * irn)
1398 spill_bb_t *spill_bb = get_irn_link(bb);
1404 spill = set_find(spill_bb->ilp, &query, sizeof(query), HASH_PTR(irn));
1406 double spill_cost = is_Unknown(irn)?0.0001:COST_STORE*execution_frequency(si, bb);
1408 spill = set_insert(spill_bb->ilp, &query, sizeof(query), HASH_PTR(irn));
1410 spill->reg_out = ILP_UNDEF;
1411 spill->reg_in = ILP_UNDEF;
1412 spill->mem_in = ILP_UNDEF;
1414 ir_snprintf(buf, sizeof(buf), "mem_out_%N_%N", irn, bb);
1415 spill->mem_out = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1417 ir_snprintf(buf, sizeof(buf), "spill_%N_%N", irn, bb);
1418 spill->spill = lpp_add_var(si->lpp, buf, lpp_binary, spill_cost);
1425 get_live_end(spill_ilp_t * si, ir_node * bb, pset * live)
1430 be_lv_foreach(si->lv, bb, be_lv_state_end, i) {
1431 irn = be_lv_get_irn(si->lv, bb, i);
1433 if (has_reg_class(si, irn) && !pset_find_ptr(si->all_possible_remats, irn)) {
1434 pset_insert_ptr(live, irn);
1438 irn = sched_last(bb);
1440 /* all values eaten by control flow operations are also live until the end of the block */
1441 sched_foreach_reverse(bb, irn) {
1444 if(!sched_skip_cf_predicator(irn, si->chordal_env->birg->main_env->arch_env)) break;
1446 for(i=get_irn_arity(irn)-1; i>=0; --i) {
1447 ir_node *arg = get_irn_n(irn,i);
1449 if(has_reg_class(si, arg)) {
1450 pset_insert_ptr(live, arg);
1457 * Inserts ILP-constraints and variables for memory copying before the given position
1460 insert_mem_copy_position(spill_ilp_t * si, pset * live, const ir_node * block)
1462 const ir_node *succ;
1463 const ir_edge_t *edge;
1464 spill_bb_t *spill_bb = get_irn_link(block);
1473 assert(edges_activated(current_ir_graph));
1475 edge = get_block_succ_first(block);
1481 edge = get_block_succ_next(block, edge);
1482 /* next block can only contain phis, if this is a merge edge */
1485 ir_snprintf(buf, sizeof(buf), "copyreg_%N", block);
1486 copyreg = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1488 ir_snprintf(buf, sizeof(buf), "check_copyreg_%N", block);
1489 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, si->n_regs);
1491 pset_foreach(live, tmp) {
1494 op_t *op = get_irn_link(irn);
1495 lpp_set_factor_fast(si->lpp, cst, op->attr.live_range.ilp, 1.0);
1497 spill = set_find_spill(spill_bb->ilp, tmp);
1500 lpp_set_factor_fast(si->lpp, cst, spill->reg_out, 1.0);
1502 lpp_set_factor_fast(si->lpp, cst, copyreg, 1.0);
1504 sched_foreach(succ, phi) {
1505 const ir_node *to_copy;
1507 spill_t *to_copy_spill;
1508 op_t *phi_op = get_irn_link(phi);
1509 ilp_var_t reload = ILP_UNDEF;
1512 if(!is_Phi(phi)) break;
1513 if(!has_reg_class(si, phi)) continue;
1515 to_copy = get_irn_n(phi, pos);
1517 to_copy_op = get_irn_link(to_copy);
1519 to_copy_spill = set_find_spill(spill_bb->ilp, to_copy);
1520 assert(to_copy_spill);
1522 if(spill_bb->reloads) {
1523 keyval_t *keyval = set_find_keyval(spill_bb->reloads, to_copy);
1526 reload = PTR_TO_INT(keyval->val);
1530 ir_snprintf(buf, sizeof(buf), "req_copy_%N_%N_%N", block, phi, to_copy);
1531 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1533 /* copy - reg_out - reload - remat - live_range <= 0 */
1534 lpp_set_factor_fast(si->lpp, cst, phi_op->attr.live_range.args.copies[pos], 1.0);
1535 lpp_set_factor_fast(si->lpp, cst, to_copy_spill->reg_out, -1.0);
1536 if(reload != ILP_UNDEF) lpp_set_factor_fast(si->lpp, cst, reload, -1.0);
1537 lpp_set_factor_fast(si->lpp, cst, to_copy_op->attr.live_range.ilp, -1.0);
1538 foreach_pre_remat(si, block, tmp) {
1539 op_t *remat_op = get_irn_link(tmp);
1540 if(remat_op->attr.remat.remat->value == to_copy) {
1541 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -1.0);
1545 ir_snprintf(buf, sizeof(buf), "copyreg_%N_%N_%N", block, phi, to_copy);
1546 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1548 /* copy - reg_out - copyreg <= 0 */
1549 lpp_set_factor_fast(si->lpp, cst, phi_op->attr.live_range.args.copies[pos], 1.0);
1550 lpp_set_factor_fast(si->lpp, cst, to_copy_spill->reg_out, -1.0);
1551 lpp_set_factor_fast(si->lpp, cst, copyreg, -1.0);
1557 * Walk all irg blocks and emit this ILP
1560 luke_blockwalker(ir_node * bb, void * data)
1562 spill_ilp_t *si = (spill_ilp_t*)data;
1567 spill_bb_t *spill_bb = get_irn_link(bb);
1570 pset *defs = pset_new_ptr_default();
1571 #ifdef WITH_MEMOPERANDS
1572 const arch_env_t *arch_env = si->chordal_env->birg->main_env->arch_env;
1576 live = pset_new_ptr_default();
1578 /****************************************
1579 * B A S I C B L O C K E N D
1580 ***************************************/
1583 /* init live values at end of block */
1584 get_live_end(si, bb, live);
1586 pset_foreach(live, irn) {
1588 ilp_var_t reload = ILP_UNDEF;
1590 spill = set_find_spill(spill_bb->ilp, irn);
1593 if(spill_bb->reloads) {
1594 keyval_t *keyval = set_find_keyval(spill_bb->reloads, irn);
1597 reload = PTR_TO_INT(keyval->val);
1601 op = get_irn_link(irn);
1602 assert(!op->is_remat);
1604 ir_snprintf(buf, sizeof(buf), "lr_%N_%N", irn, bb);
1605 op->attr.live_range.ilp = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1606 op->attr.live_range.op = bb;
1608 ir_snprintf(buf, sizeof(buf), "reg_out_%N_%N", bb, irn);
1609 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1611 /* reg_out - reload - remat - live_range <= 0 */
1612 lpp_set_factor_fast(si->lpp, cst, spill->reg_out, 1.0);
1613 if(reload != ILP_UNDEF) lpp_set_factor_fast(si->lpp, cst, reload, -1.0);
1614 lpp_set_factor_fast(si->lpp, cst, op->attr.live_range.ilp, -1.0);
1615 foreach_pre_remat(si, bb, tmp) {
1616 op_t *remat_op = get_irn_link(tmp);
1617 if(remat_op->attr.remat.remat->value == irn) {
1618 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -1.0);
1621 /* maybe we should also assure that reg_out >= live_range etc. */
1624 #ifndef NO_MEMCOPIES
1625 insert_mem_copy_position(si, live, bb);
1629 * start new live ranges for values used by remats at end of block
1630 * and assure the remat args are available
1632 foreach_pre_remat(si, bb, tmp) {
1633 op_t *remat_op = get_irn_link(tmp);
1636 for (n=get_irn_arity(tmp)-1; n>=0; --n) {
1637 ir_node *remat_arg = get_irn_n(tmp, n);
1638 op_t *arg_op = get_irn_link(remat_arg);
1641 if(!has_reg_class(si, remat_arg)) continue;
1643 /* if value is becoming live through use by remat */
1644 if(!pset_find_ptr(live, remat_arg)) {
1645 ir_snprintf(buf, sizeof(buf), "lr_%N_end%N", remat_arg, bb);
1646 prev_lr = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1648 arg_op->attr.live_range.ilp = prev_lr;
1649 arg_op->attr.live_range.op = bb;
1651 DBG((si->dbg, LEVEL_4, " value %+F becoming live through use by remat at end of block %+F\n", remat_arg, tmp));
1653 pset_insert_ptr(live, remat_arg);
1654 add_to_spill_bb(si, bb, remat_arg);
1657 /* remat <= live_rang(remat_arg) [ + reload(remat_arg) ] */
1658 ir_snprintf(buf, sizeof(buf), "req_remat_%N_arg_%N", tmp, remat_arg);
1659 cst = lpp_add_cst(si->lpp, buf, lpp_less, 0.0);
1661 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
1662 lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, -1.0);
1664 /* use reload placed for this argument */
1665 if(spill_bb->reloads) {
1666 keyval_t *keyval = set_find_keyval(spill_bb->reloads, remat_arg);
1669 ilp_var_t reload = PTR_TO_INT(keyval->val);
1671 lpp_set_factor_fast(si->lpp, cst, reload, -1.0);
1676 DBG((si->dbg, LEVEL_4, "\t %d values live at end of block %+F\n", pset_count(live), bb));
1681 /**************************************
1682 * B A S I C B L O C K B O D Y
1683 **************************************/
1685 sched_foreach_reverse_from(sched_block_last_noncf(si, bb), irn) {
1691 ilp_cst_t check_pre,
1697 #ifdef WITH_MEMOPERANDS
1698 ilp_cst_t one_memoperand;
1701 /* iterate only until first phi */
1705 op = get_irn_link(irn);
1707 if(op->is_remat) continue;
1708 DBG((si->dbg, LEVEL_4, "\t at node %+F\n", irn));
1710 /* collect defined values */
1711 if(has_reg_class(si, irn)) {
1712 pset_insert_ptr(defs, irn);
1716 if(is_Proj(irn)) continue;
1719 * init set of irn's arguments
1720 * and all possibly used values around this op
1721 * and values defined by post remats
1723 args = new_set(cmp_keyval, get_irn_arity(irn));
1724 used = pset_new_ptr(pset_count(live) + get_irn_arity(irn));
1725 remat_defs = pset_new_ptr(pset_count(live));
1727 for (n=get_irn_arity(irn)-1; n>=0; --n) {
1728 ir_node *irn_arg = get_irn_n(irn, n);
1729 if(has_reg_class(si, irn_arg)) {
1730 set_insert_keyval(args, irn_arg, (void*)n);
1731 pset_insert_ptr(used, irn_arg);
1734 foreach_post_remat(irn, tmp) {
1735 op_t *remat_op = get_irn_link(tmp);
1737 pset_insert_ptr(remat_defs, remat_op->attr.remat.remat->value);
1739 for (n=get_irn_arity(tmp)-1; n>=0; --n) {
1740 ir_node *remat_arg = get_irn_n(tmp, n);
1741 if(has_reg_class(si, remat_arg)) {
1742 pset_insert_ptr(used, remat_arg);
1746 foreach_pre_remat(si, irn, tmp) {
1747 for (n=get_irn_arity(tmp)-1; n>=0; --n) {
1748 ir_node *remat_arg = get_irn_n(tmp, n);
1749 if(has_reg_class(si, remat_arg)) {
1750 pset_insert_ptr(used, remat_arg);
1755 /**********************************
1756 * I N E P I L O G O F irn
1757 **********************************/
1759 /* ensure each dying value is used by only one post remat */
1760 pset_foreach(used, tmp) {
1761 ir_node *value = tmp;
1762 op_t *value_op = get_irn_link(value);
1767 foreach_post_remat(irn, remat) {
1768 op_t *remat_op = get_irn_link(remat);
1770 for(n=get_irn_arity(remat)-1; n>=0; --n) {
1771 ir_node *remat_arg = get_irn_n(remat, n);
1773 /* if value is used by this remat add it to constraint */
1774 if(remat_arg == value) {
1776 /* sum remat2s <= 1 + n_remats*live_range */
1777 ir_snprintf(buf, sizeof(buf), "dying_lr_%N_%N", value, irn);
1778 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 1.0);
1782 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
1788 // value_op->attr.live_range.ilp != ILP_UNDEF
1789 if(pset_find_ptr(live, value) && cst != ILP_UNDEF) {
1790 lpp_set_factor_fast(si->lpp, cst, value_op->attr.live_range.ilp, -n_remats);
1794 /* ensure at least one value dies at post remat */
1795 foreach_post_remat(irn, tmp) {
1796 op_t *remat_op = get_irn_link(tmp);
1797 pset *remat_args = pset_new_ptr(get_irn_arity(tmp));
1800 for(n=get_irn_arity(tmp)-1; n>=0; --n) {
1801 remat_arg = get_irn_n(tmp, n);
1803 if(has_reg_class(si, remat_arg)) {
1805 /* does arg always die at this op? */
1806 if(!pset_find_ptr(live, remat_arg))
1807 goto skip_one_must_die;
1809 pset_insert_ptr(remat_args, remat_arg);
1813 /* remat + \sum live_range(remat_arg) <= |args| */
1814 ir_snprintf(buf, sizeof(buf), "one_must_die_%+F", tmp);
1815 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, pset_count(remat_args));
1816 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
1818 pset_foreach(remat_args, remat_arg) {
1819 op_t *arg_op = get_irn_link(remat_arg);
1821 lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, 1.0);
1825 del_pset(remat_args);
1828 /* new live ranges for values from L\U defined by post remats */
1829 pset_foreach(live, tmp) {
1830 ir_node *value = tmp;
1831 op_t *value_op = get_irn_link(value);
1833 if(!set_find_keyval(args, value) && !pset_find_ptr(defs, value)) {
1834 ilp_var_t prev_lr = ILP_UNDEF;
1837 if(pset_find_ptr(remat_defs, value)) {
1839 /* next_live_range <= prev_live_range + sum remat2s */
1840 ir_snprintf(buf, sizeof(buf), "next_lr_%N_%N", value, irn);
1841 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1843 ir_snprintf(buf, sizeof(buf), "lr_%N_%N", value, irn);
1844 prev_lr = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1846 lpp_set_factor_fast(si->lpp, cst, value_op->attr.live_range.ilp, 1.0);
1847 lpp_set_factor_fast(si->lpp, cst, prev_lr, -1.0);
1849 foreach_post_remat(irn, remat) {
1850 op_t *remat_op = get_irn_link(remat);
1852 /* if value is being rematerialized by this remat */
1853 if(value == remat_op->attr.remat.remat->value) {
1854 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -1.0);
1858 value_op->attr.live_range.ilp = prev_lr;
1859 value_op->attr.live_range.op = irn;
1864 /* requirements for post remats and start live ranges from L/U' for values dying here */
1865 foreach_post_remat(irn, tmp) {
1866 op_t *remat_op = get_irn_link(tmp);
1869 for (n=get_irn_arity(tmp)-1; n>=0; --n) {
1870 ir_node *remat_arg = get_irn_n(tmp, n);
1871 op_t *arg_op = get_irn_link(remat_arg);
1873 if(!has_reg_class(si, remat_arg)) continue;
1875 /* only for values in L\U (TODO and D?), the others are handled with post_use */
1876 if(!pset_find_ptr(used, remat_arg)) {
1877 /* remat <= live_range(remat_arg) */
1878 ir_snprintf(buf, sizeof(buf), "req_remat2_%N_arg_%N", tmp, remat_arg);
1879 cst = lpp_add_cst(si->lpp, buf, lpp_less, 0.0);
1881 /* if value is becoming live through use by remat2 */
1882 if(!pset_find_ptr(live, remat_arg)) {
1885 ir_snprintf(buf, sizeof(buf), "lr_%N_%N", remat_arg, irn);
1886 lr = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1888 arg_op->attr.live_range.ilp = lr;
1889 arg_op->attr.live_range.op = irn;
1891 DBG((si->dbg, LEVEL_3, " value %+F becoming live through use by remat2 %+F\n", remat_arg, tmp));
1893 pset_insert_ptr(live, remat_arg);
1894 add_to_spill_bb(si, bb, remat_arg);
1897 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
1898 lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, -1.0);
1903 d = pset_count(defs);
1904 DBG((si->dbg, LEVEL_4, "\t %+F produces %d values in my register class\n", irn, d));
1906 /* count how many regs irn needs for arguments */
1907 u = set_count(args);
1910 /* check the register pressure in the epilog */
1911 /* sum_{L\U'} lr + sum_{U'} post_use <= k - |D| */
1912 ir_snprintf(buf, sizeof(buf), "check_post_%N", irn);
1913 check_post = lpp_add_cst_uniq(si->lpp, buf, lpp_less, si->n_regs - d);
1915 /* add L\U' to check_post */
1916 pset_foreach(live, tmp) {
1917 if(!pset_find_ptr(used, tmp) && !pset_find_ptr(defs, tmp)) {
1918 /* if a live value is not used by irn */
1919 tmp_op = get_irn_link(tmp);
1920 lpp_set_factor_fast(si->lpp, check_post, tmp_op->attr.live_range.ilp, 1.0);
1924 /***********************************************************
1925 * 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
1926 **********************************************************/
1929 pset_foreach(used, tmp) {
1935 op_t *arg_op = get_irn_link(arg);
1938 spill = add_to_spill_bb(si, bb, arg);
1940 /* new live range for each used value */
1941 ir_snprintf(buf, sizeof(buf), "lr_%N_%N", arg, irn);
1942 prev_lr = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1944 /* the epilog stuff - including post_use, check_post, check_post_remat */
1945 ir_snprintf(buf, sizeof(buf), "post_use_%N_%N", arg, irn);
1946 post_use = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
1948 lpp_set_factor_fast(si->lpp, check_post, post_use, 1.0);
1950 /* arg is live throughout epilog if the next live_range is in a register */
1951 if(pset_find_ptr(live, arg)) {
1952 DBG((si->dbg, LEVEL_3, "\t arg %+F is possibly live in epilog of %+F\n", arg, irn));
1954 /* post_use >= next_lr + remat */
1955 ir_snprintf(buf, sizeof(buf), "post_use_%N_%N-%d", arg, irn, p++);
1956 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1957 lpp_set_factor_fast(si->lpp, cst, post_use, -1.0);
1958 lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, 1.0);
1962 /* if value is not an arg of op and not possibly defined by post remat
1963 * then it may only die and not become live
1965 if(!set_find_keyval(args, arg)) {
1966 /* post_use <= prev_lr */
1967 ir_snprintf(buf, sizeof(buf), "req_post_use_%N_%N", arg, irn);
1968 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1969 lpp_set_factor_fast(si->lpp, cst, post_use, 1.0);
1970 lpp_set_factor_fast(si->lpp, cst, prev_lr, -1.0);
1972 if(!pset_find_ptr(remat_defs, arg) && pset_find_ptr(live, arg)) {
1973 /* next_lr <= prev_lr */
1974 ir_snprintf(buf, sizeof(buf), "next_lr_%N_%N", arg, irn);
1975 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1976 lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, 1.0);
1977 lpp_set_factor_fast(si->lpp, cst, prev_lr, -1.0);
1982 /* forall post remat which use arg add a similar cst */
1983 foreach_post_remat(irn, remat) {
1986 for (n=get_irn_arity(remat)-1; n>=0; --n) {
1987 ir_node *remat_arg = get_irn_n(remat, n);
1988 op_t *remat_op = get_irn_link(remat);
1990 if(remat_arg == arg) {
1991 DBG((si->dbg, LEVEL_3, "\t found remat with arg %+F in epilog of %+F\n", arg, irn));
1993 ir_snprintf(buf, sizeof(buf), "post_use_%N_%N-%d", arg, irn, p++);
1994 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
1995 lpp_set_factor_fast(si->lpp, cst, post_use, -1.0);
1996 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
2001 #ifdef WITH_MEMOPERANDS
2002 for(n = get_irn_arity(irn)-1; n>=0; --n) {
2003 if(get_irn_n(irn, n) == arg && arch_possible_memory_operand(arch_env, irn, n)) {
2004 ilp_var_t memoperand;
2006 ir_snprintf(buf, sizeof(buf), "memoperand_%N_%d", irn, n);
2007 memoperand = lpp_add_var(si->lpp, buf, lpp_binary, COST_MEMOPERAND*execution_frequency(si, bb));
2008 set_insert_memoperand(si->memoperands, irn, n, memoperand);
2010 ir_snprintf(buf, sizeof(buf), "nolivepost_%N_%d", irn, n);
2011 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 1.0);
2013 lpp_set_factor_fast(si->lpp, cst, memoperand, 1.0);
2014 lpp_set_factor_fast(si->lpp, cst, post_use, 1.0);
2015 // if(arg_op->attr.live_range.ilp != ILP_UNDEF)
2016 // lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, 1.0);
2021 /* new live range begins for each used value */
2022 arg_op->attr.live_range.ilp = prev_lr;
2023 arg_op->attr.live_range.op = irn;
2025 /*if(!pset_find_ptr(live, arg)) {
2026 pset_insert_ptr(live, arg);
2027 add_to_spill_bb(si, bb, arg);
2029 pset_insert_ptr(live, arg);
2033 /* just to be sure */
2034 check_post = ILP_UNDEF;
2043 /* check the register pressure in the prolog */
2044 /* sum_{L\U} lr <= k - |U| */
2045 ir_snprintf(buf, sizeof(buf), "check_pre_%N", irn);
2046 check_pre = lpp_add_cst_uniq(si->lpp, buf, lpp_less, si->n_regs - u);
2048 /* for the prolog remove defined values from the live set */
2049 pset_foreach(defs, tmp) {
2050 pset_remove_ptr(live, tmp);
2053 #ifdef WITH_MEMOPERANDS
2054 ir_snprintf(buf, sizeof(buf), "one_memoperand_%N", irn);
2055 one_memoperand = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 1.0);
2058 /***********************************************************
2059 * I T E R A T I O N O V E R A R G S F O R P R O L O G
2060 **********************************************************/
2063 set_foreach(args, keyval) {
2065 const ir_node *arg = keyval->key;
2066 int i = PTR_TO_INT(keyval->val);
2067 op_t *arg_op = get_irn_link(arg);
2068 ilp_cst_t requirements;
2069 #ifdef WITH_MEMOPERANDS
2073 spill = set_find_spill(spill_bb->ilp, arg);
2076 ir_snprintf(buf, sizeof(buf), "reload_%N_%N", arg, irn);
2077 op->attr.live_range.args.reloads[i] = lpp_add_var(si->lpp, buf, lpp_binary, COST_LOAD*execution_frequency(si, bb));
2079 /* reload <= mem_out */
2080 ir_snprintf(buf, sizeof(buf), "req_reload_%N_%N", arg, irn);
2081 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2082 lpp_set_factor_fast(si->lpp, cst, op->attr.live_range.args.reloads[i], 1.0);
2083 lpp_set_factor_fast(si->lpp, cst, spill->mem_out, -1.0);
2085 /* requirement: arg must be in register for use */
2086 /* reload + remat + live_range == 1 */
2087 ir_snprintf(buf, sizeof(buf), "req_%N_%N", irn, arg);
2088 requirements = lpp_add_cst_uniq(si->lpp, buf, lpp_equal, 1.0);
2090 lpp_set_factor_fast(si->lpp, requirements, arg_op->attr.live_range.ilp, 1.0);
2091 lpp_set_factor_fast(si->lpp, requirements, op->attr.live_range.args.reloads[i], 1.0);
2092 foreach_pre_remat(si, irn, tmp) {
2093 op_t *remat_op = get_irn_link(tmp);
2094 if(remat_op->attr.remat.remat->value == arg) {
2095 lpp_set_factor_fast(si->lpp, requirements, remat_op->attr.remat.ilp, 1.0);
2099 #ifdef WITH_MEMOPERANDS
2101 for(n = get_irn_arity(irn)-1; n>=0; --n) {
2102 if(get_irn_n(irn, n) == arg) {
2106 for(n = get_irn_arity(irn)-1; n>=0; --n) {
2107 if(get_irn_n(irn, n) == arg && arch_possible_memory_operand(arch_env, irn, n)) {
2108 memoperand_t *memoperand;
2109 memoperand = set_find_memoperand(si->memoperands, irn, n);
2111 /* memoperand <= mem_out */
2112 ir_snprintf(buf, sizeof(buf), "req_memoperand_%N_%d", irn, n);
2113 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2114 lpp_set_factor_fast(si->lpp, cst, memoperand->ilp, 1.0);
2115 lpp_set_factor_fast(si->lpp, cst, spill->mem_out, -1.0);
2117 /* the memoperand is only sufficient if it is used once by the op */
2118 if(n_memoperands == 1)
2119 lpp_set_factor_fast(si->lpp, requirements, memoperand->ilp, 1.0);
2121 lpp_set_factor_fast(si->lpp, one_memoperand, memoperand->ilp, 1.0);
2123 /* we have one more free register if we use a memory operand */
2124 lpp_set_factor_fast(si->lpp, check_pre, memoperand->ilp, -1.0);
2130 /* iterate over L\U */
2131 pset_foreach(live, tmp) {
2132 if(!set_find_keyval(args, tmp)) {
2133 /* if a live value is not used by irn */
2134 tmp_op = get_irn_link(tmp);
2135 lpp_set_factor_fast(si->lpp, check_pre, tmp_op->attr.live_range.ilp, 1.0);
2140 /* requirements for remats */
2141 /* start new live ranges for values used by remats */
2142 foreach_pre_remat(si, irn, tmp) {
2143 op_t *remat_op = get_irn_link(tmp);
2146 for (n=get_irn_arity(tmp)-1; n>=0; --n) {
2147 ir_node *remat_arg = get_irn_n(tmp, n);
2148 op_t *arg_op = get_irn_link(remat_arg);
2150 if(!has_reg_class(si, remat_arg)) continue;
2152 /* remat <= live_rang(remat_arg) [ + reload(remat_arg) ] */
2153 ir_snprintf(buf, sizeof(buf), "req_remat_%N_arg_%N", tmp, remat_arg);
2154 cst = lpp_add_cst(si->lpp, buf, lpp_less, 0.0);
2156 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
2157 lpp_set_factor_fast(si->lpp, cst, arg_op->attr.live_range.ilp, -1.0);
2159 /* if remat arg is also used by current op then we can use reload placed for this argument */
2160 if((keyval = set_find_keyval(args, remat_arg)) != NULL) {
2161 int index = (int)keyval->val;
2163 lpp_set_factor_fast(si->lpp, cst, op->attr.live_range.args.reloads[index], -1.0);
2171 /*************************
2172 * D O N E W I T H O P
2173 *************************/
2175 DBG((si->dbg, LEVEL_4, "\t %d values live at %+F\n", pset_count(live), irn));
2177 pset_foreach(live, tmp) {
2178 assert(has_reg_class(si, tmp));
2181 for (n=get_irn_arity(irn)-1; n>=0; --n) {
2182 ir_node *arg = get_irn_n(irn, n);
2184 assert(!find_post_remat(arg, irn) && "there should be no post remat for an argument of an op");
2187 del_pset(remat_defs);
2191 defs = pset_new_ptr_default();
2196 /***************************************
2197 * B E G I N N I N G O F B L O C K
2198 ***************************************/
2201 /* we are now at the beginning of the basic block, there are only \Phis in front of us */
2202 DBG((si->dbg, LEVEL_3, "\t %d values live at beginning of block %+F\n", pset_count(live), bb));
2204 pset_foreach(live, irn) {
2205 assert(is_Phi(irn) || get_nodes_block(irn) != bb);
2208 /* construct mem_outs for all values */
2210 set_foreach(spill_bb->ilp, spill) {
2211 ir_snprintf(buf, sizeof(buf), "mem_out_%N_%N", spill->irn, bb);
2212 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2214 lpp_set_factor_fast(si->lpp, cst, spill->mem_out, 1.0);
2215 lpp_set_factor_fast(si->lpp, cst, spill->spill, -1.0);
2217 if(pset_find_ptr(live, spill->irn)) {
2218 DBG((si->dbg, LEVEL_5, "\t %+F live at beginning of block %+F\n", spill->irn, bb));
2220 ir_snprintf(buf, sizeof(buf), "mem_in_%N_%N", spill->irn, bb);
2221 spill->mem_in = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
2222 lpp_set_factor_fast(si->lpp, cst, spill->mem_in, -1.0);
2224 if(is_Phi(spill->irn) && get_nodes_block(spill->irn) == bb) {
2226 op_t *op = get_irn_link(spill->irn);
2228 /* do we have to copy a phi argument? */
2229 op->attr.live_range.args.copies = obstack_alloc(si->obst, sizeof(*op->attr.live_range.args.copies) * get_irn_arity(spill->irn));
2230 memset(op->attr.live_range.args.copies, 0xFF, sizeof(*op->attr.live_range.args.copies) * get_irn_arity(spill->irn));
2232 for(n=get_irn_arity(spill->irn)-1; n>=0; --n) {
2233 const ir_node *arg = get_irn_n(spill->irn, n);
2239 /* argument already done? */
2240 if(op->attr.live_range.args.copies[n] != ILP_UNDEF) continue;
2242 /* get sum of execution frequencies of blocks with the same phi argument */
2243 for(m=n; m>=0; --m) {
2244 const ir_node *arg2 = get_irn_n(spill->irn, m);
2247 freq += execution_frequency(si, get_Block_cfgpred_block(bb, m));
2251 /* copies are not for free */
2252 ir_snprintf(buf, sizeof(buf), "copy_%N_%N", arg, spill->irn);
2253 var = lpp_add_var(si->lpp, buf, lpp_binary, COST_STORE * freq);
2255 for(m=n; m>=0; --m) {
2256 const ir_node *arg2 = get_irn_n(spill->irn, m);
2259 op->attr.live_range.args.copies[m] = var;
2263 /* copy <= mem_in */
2264 ir_snprintf(buf, sizeof(buf), "nocopy_%N_%N", arg, spill->irn);
2265 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2266 lpp_set_factor_fast(si->lpp, cst, var, 1.0);
2267 lpp_set_factor_fast(si->lpp, cst, spill->mem_in, -1.0);
2274 /* L\U is empty at bb start */
2275 /* arg is live throughout epilog if it is reg_in into this block */
2277 /* check the register pressure at the beginning of the block
2280 ir_snprintf(buf, sizeof(buf), "check_start_%N", bb);
2281 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, si->n_regs);
2283 pset_foreach(live, irn) {
2286 spill = set_find_spill(spill_bb->ilp, irn);
2289 ir_snprintf(buf, sizeof(buf), "reg_in_%N_%N", irn, bb);
2290 spill->reg_in = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
2292 lpp_set_factor_fast(si->lpp, cst, spill->reg_in, 1.0);
2294 /* spill + mem_in <= 1 */
2295 ir_snprintf(buf, sizeof(buf), "nospill_%N_%N", irn, bb);
2296 nospill = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 1);
2298 lpp_set_factor_fast(si->lpp, nospill, spill->mem_in, 1.0);
2299 lpp_set_factor_fast(si->lpp, nospill, spill->spill, 1.0);
2302 foreach_post_remat(bb, irn) {
2303 op_t *remat_op = get_irn_link(irn);
2305 DBG((si->dbg, LEVEL_4, "\t next post remat: %+F\n", irn));
2306 assert(remat_op->is_remat && !remat_op->attr.remat.pre);
2308 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
2311 /* forall post remats add requirements */
2312 foreach_post_remat(bb, tmp) {
2315 for (n=get_irn_arity(tmp)-1; n>=0; --n) {
2316 ir_node *remat_arg = get_irn_n(tmp, n);
2317 op_t *remat_op = get_irn_link(tmp);
2319 if(!has_reg_class(si, remat_arg)) continue;
2321 spill = set_find_spill(spill_bb->ilp, remat_arg);
2324 /* remat <= reg_in_argument */
2325 ir_snprintf(buf, sizeof(buf), "req_remat2_%N_%N_arg_%N", tmp, bb, remat_arg);
2326 cst = lpp_add_cst(si->lpp, buf, lpp_less, 0.0);
2327 lpp_set_factor_fast(si->lpp, cst, spill->reg_in, -1.0);
2328 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, 1.0);
2332 /* mem_in/reg_in for live_in values, especially phis and their arguments */
2333 pset_foreach(live, irn) {
2337 spill = set_find_spill(spill_bb->ilp, irn);
2338 assert(spill && spill->irn == irn);
2340 if(is_Phi(irn) && get_nodes_block(irn) == bb) {
2341 for (n=get_Phi_n_preds(irn)-1; n>=0; --n) {
2344 ir_node *phi_arg = get_Phi_pred(irn, n);
2345 ir_node *bb_p = get_Block_cfgpred_block(bb, n);
2346 spill_bb_t *spill_bb_p = get_irn_link(bb_p);
2348 op_t *op = get_irn_link(irn);
2350 /* although the phi is in the right regclass one or more of
2351 * its arguments can be in a different one or at least to
2354 if(has_reg_class(si, phi_arg)) {
2355 /* mem_in < mem_out_arg + copy */
2356 ir_snprintf(buf, sizeof(buf), "mem_in_%N_%N-%d", irn, bb, p);
2357 mem_in = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2359 /* reg_in < reg_out_arg */
2360 ir_snprintf(buf, sizeof(buf), "reg_in_%N_%N-%d", irn, bb, p++);
2361 reg_in = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2363 lpp_set_factor_fast(si->lpp, mem_in, spill->mem_in, 1.0);
2364 lpp_set_factor_fast(si->lpp, reg_in, spill->reg_in, 1.0);
2366 spill_p = set_find_spill(spill_bb_p->ilp, phi_arg);
2369 lpp_set_factor_fast(si->lpp, mem_in, spill_p->mem_out, -1.0);
2370 lpp_set_factor_fast(si->lpp, mem_in, op->attr.live_range.args.copies[n], -1.0);
2371 lpp_set_factor_fast(si->lpp, reg_in, spill_p->reg_out, -1.0);
2375 /* else assure the value arrives on all paths in the same resource */
2377 for (n=get_Block_n_cfgpreds(bb)-1; n>=0; --n) {
2380 ir_node *bb_p = get_Block_cfgpred_block(bb, n);
2381 spill_bb_t *spill_bb_p = get_irn_link(bb_p);
2384 ir_snprintf(buf, sizeof(buf), "mem_in_%N_%N-%d", irn, bb, p);
2385 mem_in = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2386 ir_snprintf(buf, sizeof(buf), "reg_in_%N_%N-%d", irn, bb, p++);
2387 reg_in = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2389 lpp_set_factor_fast(si->lpp, mem_in, spill->mem_in, 1.0);
2390 lpp_set_factor_fast(si->lpp, reg_in, spill->reg_in, 1.0);
2392 spill_p = set_find_spill(spill_bb_p->ilp, irn);
2395 lpp_set_factor_fast(si->lpp, mem_in, spill_p->mem_out, -1.0);
2396 lpp_set_factor_fast(si->lpp, reg_in, spill_p->reg_out, -1.0);
2401 /* first live ranges from reg_ins */
2402 pset_foreach(live, irn) {
2403 op_t *op = get_irn_link(irn);
2405 spill = set_find_spill(spill_bb->ilp, irn);
2406 assert(spill && spill->irn == irn);
2408 ir_snprintf(buf, sizeof(buf), "first_lr_%N_%N", irn, bb);
2409 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2410 lpp_set_factor_fast(si->lpp, cst, op->attr.live_range.ilp, 1.0);
2411 lpp_set_factor_fast(si->lpp, cst, spill->reg_in, -1.0);
2413 foreach_post_remat(bb, tmp) {
2414 op_t *remat_op = get_irn_link(tmp);
2416 if(remat_op->attr.remat.remat->value == irn) {
2417 lpp_set_factor_fast(si->lpp, cst, remat_op->attr.remat.ilp, -1.0);
2422 /* walk forward now and compute constraints for placing spills */
2423 /* this must only be done for values that are not defined in this block */
2424 /* TODO are these values at start of block? if yes, just check whether this is a diverge edge and skip the loop */
2425 pset_foreach(live, irn) {
2427 * if value is defined in this block we can anways place the spill directly after the def
2428 * -> no constraint necessary
2430 if(!is_Phi(irn) && get_nodes_block(irn) == bb) continue;
2433 spill = set_find_spill(spill_bb->ilp, irn);
2436 ir_snprintf(buf, sizeof(buf), "req_spill_%N_%N", irn, bb);
2437 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0.0);
2439 lpp_set_factor_fast(si->lpp, cst, spill->spill, 1.0);
2440 if(is_diverge_edge(bb)) lpp_set_factor_fast(si->lpp, cst, spill->reg_in, -1.0);
2443 sched_foreach_op(bb, tmp) {
2444 op_t *op = get_irn_link(tmp);
2446 if(is_Phi(tmp)) continue;
2447 assert(!is_Proj(tmp));
2450 const ir_node *value = op->attr.remat.remat->value;
2453 /* only collect remats up to the first real use of a value */
2454 lpp_set_factor_fast(si->lpp, cst, op->attr.remat.ilp, -1.0);
2459 for (n=get_irn_arity(tmp)-1; n>=0; --n) {
2460 ir_node *arg = get_irn_n(tmp, n);
2463 /* if a value is used stop collecting remats */
2476 typedef struct _irnlist_t {
2477 struct list_head list;
2481 typedef struct _interference_t {
2482 struct list_head blocklist;
2488 cmp_interference(const void *a, const void *b, size_t size)
2490 const interference_t *p = a;
2491 const interference_t *q = b;
2493 return !(p->a == q->a && p->b == q->b);
2496 static interference_t *
2497 set_find_interference(set * set, ir_node * a, ir_node * b)
2499 interference_t query;
2501 query.a = (a>b)?a:b;
2502 query.b = (a>b)?b:a;
2504 return set_find(set, &query, sizeof(query), HASH_PTR(PTR_TO_INT(a) ^ PTR_TO_INT(b)));
2507 static interference_t *
2508 set_insert_interference(spill_ilp_t * si, set * set, ir_node * a, ir_node * b, ir_node * bb)
2510 interference_t query,
2512 irnlist_t *list = obstack_alloc(si->obst, sizeof(*list));
2516 result = set_find_interference(set, a, b);
2519 list_add(&list->list, &result->blocklist);
2523 query.a = (a>b)?a:b;
2524 query.b = (a>b)?b:a;
2526 result = set_insert(set, &query, sizeof(query), HASH_PTR(PTR_TO_INT(a) ^ PTR_TO_INT(b)));
2528 INIT_LIST_HEAD(&result->blocklist);
2529 list_add(&list->list, &result->blocklist);
2535 values_interfere_in_block(const spill_ilp_t * si, const ir_node * bb, const ir_node * a, const ir_node * b)
2537 const ir_edge_t *edge;
2539 if(get_nodes_block(a) != bb && get_nodes_block(b) != bb) {
2540 /* both values are live in, so they interfere */
2544 /* ensure a dominates b */
2545 if(value_dominates(b,a)) {
2551 assert(get_nodes_block(b) == bb && "at least b should be defined here in this block");
2554 /* the following code is stolen from bera.c */
2555 if(be_is_live_end(si->lv, bb, a))
2558 foreach_out_edge(a, edge) {
2559 const ir_node *user = edge->src;
2560 if(get_nodes_block(user) == bb
2563 && value_dominates(b, user))
2571 * Walk all irg blocks and collect interfering values inside of phi classes
2574 luke_interferencewalker(ir_node * bb, void * data)
2576 spill_ilp_t *si = (spill_ilp_t*)data;
2579 be_lv_foreach(si->lv, bb, be_lv_state_end | be_lv_state_out | be_lv_state_in, l1) {
2580 ir_node *a = be_lv_get_irn(si->lv, bb, l1);
2581 op_t *a_op = get_irn_link(a);
2583 if(a_op->is_remat) continue;
2585 /* a is only interesting if it is in my register class and if it is inside a phi class */
2586 if (has_reg_class(si, a) && get_phi_class(a)) {
2587 for(l2=_be_lv_next_irn(si->lv, bb, 0xff, l1+1); l2>=0; l2=_be_lv_next_irn(si->lv, bb, 0xff, l2+1)) {
2588 ir_node *b = be_lv_get_irn(si->lv, bb, l2);
2589 op_t *b_op = get_irn_link(b);
2591 if(b_op->is_remat) continue;
2593 /* a and b are only interesting if they are in the same phi class */
2594 if(has_reg_class(si, b) && get_phi_class(a) == get_phi_class(b)) {
2595 if(values_interfere_in_block(si, bb, a, b)) {
2596 DBG((si->dbg, LEVEL_4, "\tvalues interfere in %+F: %+F, %+F\n", bb, a, b));
2597 set_insert_interference(si, si->interferences, a, b, bb);
2605 static unsigned int copy_path_id = 0;
2608 write_copy_path_cst(spill_ilp_t *si, pset * copies, ilp_var_t any_interfere)
2615 ir_snprintf(buf, sizeof(buf), "copy_path-%d", copy_path_id++);
2616 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0);
2618 lpp_set_factor_fast(si->lpp, cst, any_interfere, 1.0);
2620 pset_foreach(copies, ptr) {
2621 copy = PTR_TO_INT(ptr);
2622 lpp_set_factor_fast(si->lpp, cst, copy, -1.0);
2627 * @parameter copies contains a path of copies which lead us to irn
2628 * @parameter visited contains a set of nodes already visited on this path
2631 find_copy_path(spill_ilp_t * si, const ir_node * irn, const ir_node * target, ilp_var_t any_interfere, pset * copies, pset * visited)
2633 const ir_edge_t *edge;
2634 op_t *op = get_irn_link(irn);
2635 pset *visited_users = pset_new_ptr_default();
2638 if(op->is_remat) return 0;
2640 pset_insert_ptr(visited, irn);
2644 pset *visited_operands = pset_new_ptr(get_irn_arity(irn));
2646 /* visit all operands */
2647 for(n=get_irn_arity(irn)-1; n>=0; --n) {
2648 ir_node *arg = get_irn_n(irn, n);
2649 ilp_var_t copy = op->attr.live_range.args.copies[n];
2651 if(!has_reg_class(si, arg)) continue;
2652 if(pset_find_ptr(visited_operands, arg)) continue;
2653 pset_insert_ptr(visited_operands, arg);
2656 if(++paths > MAX_PATHS && pset_count(copies) != 0) {
2657 del_pset(visited_operands);
2658 del_pset(visited_users);
2659 pset_remove_ptr(visited, irn);
2662 pset_insert(copies, INT_TO_PTR(copy), copy);
2663 write_copy_path_cst(si, copies, any_interfere);
2664 pset_remove(copies, INT_TO_PTR(copy), copy);
2665 } else if(!pset_find_ptr(visited, arg)) {
2666 pset_insert(copies, INT_TO_PTR(copy), copy);
2667 paths += find_copy_path(si, arg, target, any_interfere, copies, visited);
2668 pset_remove(copies, INT_TO_PTR(copy), copy);
2670 /*if(paths > MAX_PATHS) {
2671 if(pset_count(copies) == 0) {
2675 ir_snprintf(buf, sizeof(buf), "always_copy-%d-%d", any_interfere, copy);
2676 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_equal, 0);
2677 lpp_set_factor_fast(si->lpp, cst, any_interfere, -1.0);
2678 lpp_set_factor_fast(si->lpp, cst, copy, 1.0);
2679 DBG((si->dbg, LEVEL_1, "ALWAYS COPYING %d FOR INTERFERENCE %d\n", copy, any_interfere));
2683 del_pset(visited_operands);
2684 del_pset(visited_users);
2685 pset_remove_ptr(visited, irn);
2688 } else if(pset_count(copies) == 0) {
2694 del_pset(visited_operands);
2697 /* visit all uses which are phis */
2698 foreach_out_edge(irn, edge) {
2699 ir_node *user = edge->src;
2700 int pos = edge->pos;
2701 op_t *op = get_irn_link(user);
2704 if(!is_Phi(user)) continue;
2705 if(!has_reg_class(si, user)) continue;
2706 if(pset_find_ptr(visited_users, user)) continue;
2707 pset_insert_ptr(visited_users, user);
2709 copy = op->attr.live_range.args.copies[pos];
2711 if(user == target) {
2712 if(++paths > MAX_PATHS && pset_count(copies) != 0) {
2713 del_pset(visited_users);
2714 pset_remove_ptr(visited, irn);
2717 pset_insert(copies, INT_TO_PTR(copy), copy);
2718 write_copy_path_cst(si, copies, any_interfere);
2719 pset_remove(copies, INT_TO_PTR(copy), copy);
2720 } else if(!pset_find_ptr(visited, user)) {
2721 pset_insert(copies, INT_TO_PTR(copy), copy);
2722 paths += find_copy_path(si, user, target, any_interfere, copies, visited);
2723 pset_remove(copies, INT_TO_PTR(copy), copy);
2725 /*if(paths > MAX_PATHS) {
2726 if(pset_count(copies) == 0) {
2730 ir_snprintf(buf, sizeof(buf), "always_copy-%d-%d", any_interfere, copy);
2731 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_equal, 0);
2732 lpp_set_factor_fast(si->lpp, cst, any_interfere, -1.0);
2733 lpp_set_factor_fast(si->lpp, cst, copy, 1.0);
2734 DBG((si->dbg, LEVEL_1, "ALWAYS COPYING %d FOR INTERFERENCE %d\n", copy, any_interfere));
2738 del_pset(visited_users);
2739 pset_remove_ptr(visited, irn);
2742 } else if(pset_count(copies) == 0) {
2748 del_pset(visited_users);
2749 pset_remove_ptr(visited, irn);
2754 gen_copy_constraints(spill_ilp_t * si, const ir_node * a, const ir_node * b, ilp_var_t any_interfere)
2756 pset * copies = pset_new_ptr_default();
2757 pset * visited = pset_new_ptr_default();
2759 find_copy_path(si, a, b, any_interfere, copies, visited);
2767 memcopyhandler(spill_ilp_t * si)
2769 interference_t *interference;
2771 /* teste Speicherwerte auf Interferenz */
2773 /* analyze phi classes */
2774 phi_class_compute(si->chordal_env->irg);
2776 DBG((si->dbg, LEVEL_2, "\t calling interferencewalker\n"));
2777 irg_block_walk_graph(si->chordal_env->irg, luke_interferencewalker, NULL, si);
2779 /* now lets emit the ILP unequations for the crap */
2780 set_foreach(si->interferences, interference) {
2782 ilp_var_t interfere,
2784 ilp_cst_t any_interfere_cst,
2786 const ir_node *a = interference->a;
2787 const ir_node *b = interference->b;
2789 /* any_interf <= \sum interf */
2790 ir_snprintf(buf, sizeof(buf), "interfere_%N_%N", a, b);
2791 any_interfere_cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0);
2792 any_interfere = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
2794 lpp_set_factor_fast(si->lpp, any_interfere_cst, any_interfere, 1.0);
2796 list_for_each_entry(irnlist_t, irnlist, &interference->blocklist, list) {
2797 const ir_node *bb = irnlist->irn;
2798 spill_bb_t *spill_bb = get_irn_link(bb);
2803 spilla = set_find_spill(spill_bb->ilp, a);
2806 spillb = set_find_spill(spill_bb->ilp, b);
2809 /* interfere <-> (mem_in_a or spill_a) and (mem_in_b or spill_b): */
2810 /* 1: mem_in_a + mem_in_b + spill_a + spill_b - interfere <= 1 */
2811 /* 2: - mem_in_a - spill_a + interfere <= 0 */
2812 /* 3: - mem_in_b - spill_b + interfere <= 0 */
2813 ir_snprintf(buf, sizeof(buf), "interfere_%N_%N_%N", bb, a, b);
2814 interfere = lpp_add_var(si->lpp, buf, lpp_binary, 0.0);
2816 ir_snprintf(buf, sizeof(buf), "interfere_%N_%N_%N-1", bb, a, b);
2817 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 1);
2819 lpp_set_factor_fast(si->lpp, cst, interfere, -1.0);
2820 if(spilla->mem_in != ILP_UNDEF) lpp_set_factor_fast(si->lpp, cst, spilla->mem_in, 1.0);
2821 lpp_set_factor_fast(si->lpp, cst, spilla->spill, 1.0);
2822 if(spillb->mem_in != ILP_UNDEF) lpp_set_factor_fast(si->lpp, cst, spillb->mem_in, 1.0);
2823 lpp_set_factor_fast(si->lpp, cst, spillb->spill, 1.0);
2825 ir_snprintf(buf, sizeof(buf), "interfere_%N_%N_%N-2", bb, a, b);
2826 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0);
2828 lpp_set_factor_fast(si->lpp, cst, interfere, 1.0);
2829 if(spilla->mem_in != ILP_UNDEF) lpp_set_factor_fast(si->lpp, cst, spilla->mem_in, -1.0);
2830 lpp_set_factor_fast(si->lpp, cst, spilla->spill, -1.0);
2832 ir_snprintf(buf, sizeof(buf), "interfere_%N_%N_%N-3", bb, a, b);
2833 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0);
2835 lpp_set_factor_fast(si->lpp, cst, interfere, 1.0);
2836 if(spillb->mem_in != ILP_UNDEF) lpp_set_factor_fast(si->lpp, cst, spillb->mem_in, -1.0);
2837 lpp_set_factor_fast(si->lpp, cst, spillb->spill, -1.0);
2840 lpp_set_factor_fast(si->lpp, any_interfere_cst, interfere, -1.0);
2842 /* any_interfere >= interf */
2843 ir_snprintf(buf, sizeof(buf), "interfere_%N_%N-%N", a, b, bb);
2844 cst = lpp_add_cst_uniq(si->lpp, buf, lpp_less, 0);
2846 lpp_set_factor_fast(si->lpp, cst, interfere, 1.0);
2847 lpp_set_factor_fast(si->lpp, cst, any_interfere, -1.0);
2850 /* now that we know whether the two values interfere in memory we can drop constraints to enforce copies */
2851 gen_copy_constraints(si,a,b,any_interfere);
2859 return fabs(x) < 0.00001;
2863 static int mark_remat_nodes_hook(FILE *F, ir_node *n, ir_node *l)
2865 spill_ilp_t *si = get_irg_link(current_ir_graph);
2867 if(pset_find_ptr(si->all_possible_remats, n)) {
2868 op_t *op = (op_t*)get_irn_link(n);
2869 assert(op && op->is_remat);
2871 if(!op->attr.remat.remat->inverse) {
2872 if(op->attr.remat.pre) {
2873 ir_fprintf(F, "color:red info3:\"remat value: %+F\"", op->attr.remat.remat->value);
2875 ir_fprintf(F, "color:orange info3:\"remat2 value: %+F\"", op->attr.remat.remat->value);
2880 op_t *op = (op_t*)get_irn_link(n);
2881 assert(op && op->is_remat);
2883 if(op->attr.remat.pre) {
2884 ir_fprintf(F, "color:cyan info3:\"remat inverse value: %+F\"", op->attr.remat.remat->value);
2886 ir_fprintf(F, "color:lightcyan info3:\"remat2 inverse value: %+F\"", op->attr.remat.remat->value);
2897 dump_graph_with_remats(ir_graph * irg, const char * suffix)
2899 set_dump_node_vcgattr_hook(mark_remat_nodes_hook);
2900 be_dump(irg, suffix, dump_ir_block_graph_sched);
2901 set_dump_node_vcgattr_hook(NULL);
2906 * Edge hook to dump the schedule edges with annotated register pressure.
2909 sched_pressure_edge_hook(FILE *F, ir_node *irn)
2911 if(sched_is_scheduled(irn) && sched_has_prev(irn)) {
2912 ir_node *prev = sched_prev(irn);
2913 fprintf(F, "edge:{sourcename:\"");
2915 fprintf(F, "\" targetname:\"");
2917 fprintf(F, "\" label:\"%d", (int)get_irn_link(irn));
2918 fprintf(F, "\" color:magenta}\n");
2924 dump_ir_block_graph_sched_pressure(ir_graph *irg, const char *suffix)
2926 DUMP_NODE_EDGE_FUNC old_edge_hook = get_dump_node_edge_hook();
2928 dump_consts_local(0);
2929 set_dump_node_edge_hook(sched_pressure_edge_hook);
2930 dump_ir_block_graph(irg, suffix);
2931 set_dump_node_edge_hook(old_edge_hook);
2935 walker_pressure_annotator(ir_node * bb, void * data)
2937 spill_ilp_t *si = data;
2940 pset *live = pset_new_ptr_default();
2943 be_lv_foreach(si->lv, bb, be_lv_state_end, i) {
2944 irn = be_lv_get_irn(si->lv, bb, i);
2946 if (has_reg_class(si, irn)) {
2947 pset_insert_ptr(live, irn);
2951 set_irn_link(bb, INT_TO_PTR(pset_count(live)));
2953 sched_foreach_reverse(bb, irn) {
2955 set_irn_link(irn, INT_TO_PTR(pset_count(live)));
2959 if(has_reg_class(si, irn)) {
2960 pset_remove_ptr(live, irn);
2961 if(is_Proj(irn)) ++projs;
2964 if(!is_Proj(irn)) projs = 0;
2966 for (n=get_irn_arity(irn)-1; n>=0; --n) {
2967 ir_node *arg = get_irn_n(irn, n);
2969 if(has_reg_class(si, arg)) pset_insert_ptr(live, arg);
2971 set_irn_link(irn, INT_TO_PTR(pset_count(live)+projs));
2978 dump_pressure_graph(spill_ilp_t * si, const char *suffix)
2980 be_dump(si->chordal_env->irg, suffix, dump_ir_block_graph_sched_pressure);
2985 connect_all_remats_with_keep(spill_ilp_t * si)
2993 n_remats = pset_count(si->all_possible_remats);
2995 ins = obstack_alloc(si->obst, n_remats * sizeof(*ins));
2998 pset_foreach(si->all_possible_remats, irn) {
3003 si->keep = be_new_Keep(si->chordal_env->cls, si->chordal_env->irg, get_irg_end_block(si->chordal_env->irg), n_remats, ins);
3005 obstack_free(si->obst, ins);
3011 connect_all_spills_with_keep(spill_ilp_t * si)
3020 n_spills = pset_count(si->spills);
3022 ins = obstack_alloc(si->obst, n_spills * sizeof(*ins));
3025 pset_foreach(si->spills, irn) {
3030 keep = be_new_Keep(si->chordal_env->cls, si->chordal_env->irg, get_irg_end_block(si->chordal_env->irg), n_spills, ins);
3032 obstack_free(si->obst, ins);
3036 /** insert a spill at an arbitrary position */
3037 ir_node *be_spill2(const arch_env_t *arch_env, ir_node *irn, ir_node *insert, ir_node *ctx)
3039 ir_node *bl = is_Block(insert)?insert:get_nodes_block(insert);
3040 ir_graph *irg = get_irn_irg(bl);
3041 ir_node *frame = get_irg_frame(irg);
3045 const arch_register_class_t *cls = arch_get_irn_reg_class(arch_env, irn, -1);
3046 const arch_register_class_t *cls_frame = arch_get_irn_reg_class(arch_env, frame, -1);
3048 spill = be_new_Spill(cls, cls_frame, irg, bl, frame, irn, ctx);
3051 * search the right insertion point. a spill of a phi cannot be put
3052 * directly after the phi, if there are some phis behind the one which
3053 * is spilled. Also, a spill of a Proj must be after all Projs of the
3056 * Here's one special case:
3057 * If the spill is in the start block, the spill must be after the frame
3058 * pointer is set up. This is done by setting insert to the end of the block
3059 * which is its default initialization (see above).
3062 if(bl == get_irg_start_block(irg) && sched_get_time_step(frame) >= sched_get_time_step(insert))
3065 for (next = sched_next(insert); is_Phi(next) || is_Proj(next); next = sched_next(insert))
3068 sched_add_after(insert, spill);
3073 delete_remat(spill_ilp_t * si, ir_node * remat) {
3075 ir_node *bad = get_irg_bad(si->chordal_env->irg);
3077 sched_remove(remat);
3079 /* kill links to operands */
3080 for (n=get_irn_arity(remat)-1; n>=-1; --n) {
3081 set_irn_n(remat, n, bad);
3086 clean_remat_info(spill_ilp_t * si)
3090 remat_info_t *remat_info;
3091 ir_node *bad = get_irg_bad(si->chordal_env->irg);
3093 set_foreach(si->remat_info, remat_info) {
3094 if(!remat_info->remats) continue;
3096 pset_foreach(remat_info->remats, remat)
3098 if(remat->proj && get_irn_n_edges(remat->proj) == 0) {
3099 set_irn_n((ir_node*)remat->proj, -1, bad);
3100 set_irn_n((ir_node*)remat->proj, 0, bad);
3103 if(get_irn_n_edges(remat->op) == 0) {
3104 for (n=get_irn_arity(remat->op)-1; n>=-1; --n) {
3105 set_irn_n((ir_node*)remat->op, n, bad);
3110 if(remat_info->remats) del_pset(remat_info->remats);
3111 if(remat_info->remats_by_operand) del_pset(remat_info->remats_by_operand);
3116 delete_unnecessary_remats(spill_ilp_t * si)
3120 ir_node *bad = get_irg_bad(si->chordal_env->irg);
3123 ir_node *end = get_irg_end(si->chordal_env->irg);
3126 for (n=get_irn_arity(si->keep)-1; n>=0; --n) {
3127 ir_node *keep_arg = get_irn_n(si->keep, n);
3128 op_t *arg_op = get_irn_link(keep_arg);
3131 assert(arg_op->is_remat);
3133 name = si->lpp->vars[arg_op->attr.remat.ilp];
3135 if(is_zero(name->value)) {
3136 DBG((si->dbg, LEVEL_3, "\t deleting remat %+F\n", keep_arg));
3137 /* TODO check whether reload is preferred over remat (could be bug) */
3138 delete_remat(si, keep_arg);
3140 if(!arg_op->attr.remat.remat->inverse) {
3141 if(arg_op->attr.remat.pre) {
3142 DBG((si->dbg, LEVEL_2, "\t**remat kept: %+F\n", keep_arg));
3144 DBG((si->dbg, LEVEL_2, "\t%%%%remat2 kept: %+F\n", keep_arg));
3147 if(arg_op->attr.remat.pre) {
3148 DBG((si->dbg, LEVEL_2, "\t**INVERSE remat kept: %+F\n", keep_arg));
3150 DBG((si->dbg, LEVEL_2, "\t%%%%INVERSE remat2 kept: %+F\n", keep_arg));
3155 set_irn_n(si->keep, n, bad);
3158 for (i = 0, n = get_End_n_keepalives(end); i < n; ++i) {
3159 ir_node *end_arg = get_End_keepalive(end, i);
3161 if(end_arg != si->keep) {
3162 obstack_grow(si->obst, &end_arg, sizeof(end_arg));
3165 keeps = obstack_finish(si->obst);
3166 set_End_keepalives(end, n-1, keeps);
3167 obstack_free(si->obst, keeps);
3170 DBG((si->dbg, LEVEL_2, "\t no remats to delete (none have been inserted)\n"));
3175 pset_foreach(si->all_possible_remats, remat) {
3176 op_t *remat_op = get_irn_link(remat);
3177 lpp_name_t *name = si->lpp->vars[remat_op->attr.remat.ilp];
3179 if(is_zero(name->value)) {
3180 DBG((si->dbg, LEVEL_3, "\t deleting remat %+F\n", remat));
3181 /* TODO check whether reload is preferred over remat (could be bug) */
3182 delete_remat(si, remat);
3184 if(!remat_op->attr.remat.remat->inverse) {
3185 if(remat_op->attr.remat.pre) {
3186 DBG((si->dbg, LEVEL_2, "\t**remat kept: %+F\n", remat));
3188 DBG((si->dbg, LEVEL_2, "\t%%%%remat2 kept: %+F\n", remat));
3191 if(remat_op->attr.remat.pre) {
3192 DBG((si->dbg, LEVEL_2, "\t**INVERSE remat kept: %+F\n", remat));
3194 DBG((si->dbg, LEVEL_2, "\t%%%%INVERSE remat2 kept: %+F\n", remat));
3203 get_spills_for_value(spill_ilp_t * si, const ir_node * value)
3205 pset *spills = pset_new_ptr_default();
3207 const ir_node *next;
3210 defs = set_find_def(si->values, value);
3212 if(defs && defs->spills) {
3213 for(next = defs->spills; next; next = get_irn_link(next)) {
3214 pset_insert_ptr(spills, next);
3222 * @param before The node after which the spill will be placed in the schedule
3224 /* TODO set context properly */
3226 insert_spill(spill_ilp_t * si, ir_node * irn, const ir_node * value, ir_node * before)
3230 const arch_env_t *arch_env = si->chordal_env->birg->main_env->arch_env;
3232 DBG((si->dbg, LEVEL_3, "\t inserting spill for value %+F after %+F\n", irn, before));
3234 spill = be_spill2(arch_env, irn, before, irn);
3236 defs = set_insert_def(si->values, value);
3239 /* enter into the linked list */
3240 set_irn_link(spill, defs->spills);
3241 defs->spills = spill;
3243 #ifdef KEEPALIVE_SPILLS
3244 pset_insert_ptr(si->spills, spill);
3251 * @param before The Phi node which has to be spilled
3254 insert_mem_phi(spill_ilp_t * si, ir_node * phi)
3261 NEW_ARR_A(ir_node*, ins, get_irn_arity(phi));
3263 for(n=get_irn_arity(phi)-1; n>=0; --n) {
3264 ins[n] = si->m_unknown;
3267 mem_phi = new_r_Phi(si->chordal_env->irg, get_nodes_block(phi), get_irn_arity(phi), ins, mode_M);
3269 defs = set_insert_def(si->values, phi);
3272 /* enter into the linked list */
3273 set_irn_link(mem_phi, defs->spills);
3274 defs->spills = mem_phi;
3276 sched_add_after(phi, mem_phi);
3278 #ifdef KEEPALIVE_SPILLS
3279 pset_insert_ptr(si->spills, mem_phi);
3287 * Add remat to list of defs, destroys link field!
3290 insert_remat(spill_ilp_t * si, ir_node * remat)
3293 op_t *remat_op = get_irn_link(remat);
3295 assert(remat_op->is_remat);
3297 defs = set_insert_def(si->values, remat_op->attr.remat.remat->value);
3300 /* enter into the linked list */
3301 set_irn_link(remat, defs->remats);
3302 defs->remats = remat;
3307 * Add reload before operation and add to list of defs
3310 insert_reload(spill_ilp_t * si, const ir_node * value, ir_node * after)
3315 const arch_env_t *arch_env = si->chordal_env->birg->main_env->arch_env;
3317 DBG((si->dbg, LEVEL_3, "\t inserting reload for value %+F before %+F\n", value, after));
3319 defs = set_find_def(si->values, value);
3321 spill = defs->spills;
3322 assert(spill && "no spill placed before reload");
3324 reload = be_reload(arch_env, si->cls, after, get_irn_mode(value), spill);
3326 /* enter into the linked list */
3327 set_irn_link(reload, defs->remats);
3328 defs->remats = reload;
3333 #ifdef WITH_MEMOPERANDS
3334 void perform_memory_operand(spill_ilp_t * si, memoperand_t * memoperand)
3338 ir_node *value = get_irn_n(memoperand->irn, memoperand->pos);
3340 const arch_env_t *arch_env = si->chordal_env->birg->main_env->arch_env;
3342 DBG((si->dbg, LEVEL_2, "\t inserting memory operand for value %+F at %+F\n", value, memoperand->irn));
3344 defs = set_find_def(si->values, value);
3346 spill = defs->spills;
3347 assert(spill && "no spill placed before reload");
3349 reload = be_reload(arch_env, si->cls, memoperand->irn, get_irn_mode(value), spill);
3351 arch_perform_memory_operand(arch_env, memoperand->irn, reload, memoperand->pos);
3352 sched_remove(reload);
3355 void insert_memoperands(spill_ilp_t * si)
3357 memoperand_t *memoperand;
3360 set_foreach(si->memoperands, memoperand) {
3361 name = si->lpp->vars[memoperand->ilp];
3362 if(!is_zero(name->value)) {
3363 perform_memory_operand(si, memoperand);
3370 walker_spill_placer(ir_node * bb, void * data) {
3371 spill_ilp_t *si = (spill_ilp_t*)data;
3373 spill_bb_t *spill_bb = get_irn_link(bb);
3374 pset *spills_to_do = pset_new_ptr_default();
3377 set_foreach(spill_bb->ilp, spill) {
3380 if(is_Phi(spill->irn) && get_nodes_block(spill->irn) == bb) {
3381 name = si->lpp->vars[spill->mem_in];
3382 if(!is_zero(name->value)) {
3385 mem_phi = insert_mem_phi(si, spill->irn);
3387 DBG((si->dbg, LEVEL_2, "\t >>spilled Phi %+F -> %+F\n", spill->irn, mem_phi));
3391 name = si->lpp->vars[spill->spill];
3392 if(!is_zero(name->value)) {
3393 /* place spill directly after definition */
3394 if(get_nodes_block(spill->irn) == bb) {
3395 insert_spill(si, spill->irn, spill->irn, spill->irn);
3399 /* place spill at bb start */
3400 if(spill->reg_in > 0) {
3401 name = si->lpp->vars[spill->reg_in];
3402 if(!is_zero(name->value)) {
3403 insert_spill(si, spill->irn, spill->irn, bb);
3407 /* place spill after a remat */
3408 pset_insert_ptr(spills_to_do, spill->irn);
3411 DBG((si->dbg, LEVEL_3, "\t %d spills to do in block %+F\n", pset_count(spills_to_do), bb));
3414 for(irn = sched_block_first_nonphi(bb); !sched_is_end(irn); irn = sched_next(irn)) {
3415 op_t *op = get_irn_link(irn);
3417 if(be_is_Spill(irn)) continue;
3420 /* TODO fix this if we want to support remats with more than two nodes */
3421 if(get_irn_mode(irn) != mode_T && pset_find_ptr(spills_to_do, op->attr.remat.remat->value)) {
3422 pset_remove_ptr(spills_to_do, op->attr.remat.remat->value);
3424 insert_spill(si, irn, op->attr.remat.remat->value, irn);
3427 if(pset_find_ptr(spills_to_do, irn)) {
3428 pset_remove_ptr(spills_to_do, irn);
3430 insert_spill(si, irn, irn, irn);
3436 assert(pset_count(spills_to_do) == 0);
3438 /* afterwards free data in block */
3439 del_pset(spills_to_do);
3443 insert_mem_copy(spill_ilp_t * si, ir_node * bb, ir_node * value)
3445 ir_node *insert_pos = bb;
3447 const arch_env_t *arch_env = si->chordal_env->birg->main_env->arch_env;
3449 /* find last definition of arg value in block */
3454 defs = set_find_def(si->values, value);
3456 if(defs && defs->remats) {
3457 for(next = defs->remats; next; next = get_irn_link(next)) {
3458 if(get_nodes_block(next) == bb && sched_get_time_step(next) > last) {
3459 last = sched_get_time_step(next);
3465 if(get_nodes_block(value) == bb && sched_get_time_step(value) > last) {
3466 last = sched_get_time_step(value);
3470 DBG((si->dbg, LEVEL_2, "\t inserting mem copy for value %+F after %+F\n", value, insert_pos));
3472 spill = be_spill2(arch_env, is_Block(insert_pos)?value:insert_pos, insert_pos, value);
3478 phim_fixer(spill_ilp_t *si) {
3481 set_foreach(si->values, defs) {
3482 const ir_node *phi = defs->value;
3483 op_t *op = get_irn_link(phi);
3484 ir_node *phi_m = NULL;
3485 ir_node *next = defs->spills;
3488 if(!is_Phi(phi)) continue;
3491 if(is_Phi(next) && get_irn_mode(next) == mode_M) {
3495 next = get_irn_link(next);
3498 if(!phi_m) continue;
3500 for(n=get_irn_arity(phi)-1; n>=0; --n) {
3501 ir_node *value = get_irn_n(phi, n);
3502 defs_t *val_defs = set_find_def(si->values, value);
3504 /* a spill of this value */
3508 #ifndef NO_MEMCOPIES
3509 ir_node *pred = get_Block_cfgpred_block(get_nodes_block(phi), n);
3510 lpp_name_t *name = si->lpp->vars[op->attr.live_range.args.copies[n]];
3512 if(!is_zero(name->value)) {
3513 spill = insert_mem_copy(si, pred, value);
3515 spill = val_defs->spills;
3518 spill = val_defs->spills;
3520 assert(spill && "no spill placed before PhiM");
3521 set_irn_n(phi_m, n, spill);
3527 walker_reload_placer(ir_node * bb, void * data) {
3528 spill_ilp_t *si = (spill_ilp_t*)data;
3530 spill_bb_t *spill_bb = get_irn_link(bb);
3532 /* reloads at end of block */
3533 if(spill_bb->reloads) {
3536 set_foreach(spill_bb->reloads, keyval) {
3537 ir_node *irn = (ir_node*)keyval->key;
3538 ilp_var_t reload = PTR_TO_INT(keyval->val);
3541 name = si->lpp->vars[reload];
3542 if(!is_zero(name->value)) {
3544 ir_node *insert_pos = bb;
3545 ir_node *prev = sched_block_last_noncf(si, bb);
3546 op_t *prev_op = get_irn_link(prev);
3548 while(be_is_Spill(prev)) {
3549 prev = sched_prev(prev);
3552 prev_op = get_irn_link(prev);
3554 /* insert reload before pre-remats */
3555 while(!sched_is_end(prev) && !be_is_Reload(prev) && !is_Phi(prev)
3556 && prev_op->is_remat && prev_op->attr.remat.pre) {
3560 prev = sched_prev(prev);
3561 } while(be_is_Spill(prev));
3563 prev_op = get_irn_link(prev);
3567 reload = insert_reload(si, irn, insert_pos);
3569 #ifdef KEEPALIVE_RELOADS
3570 pset_insert_ptr(si->spills, reload);
3576 /* walk and insert more reloads and collect remats */
3577 sched_foreach_reverse(bb, irn) {
3578 op_t *op = get_irn_link(irn);
3580 if(be_is_Reload(irn) || be_is_Spill(irn)) continue;
3581 if(is_Phi(irn)) break;
3584 if(get_irn_mode(irn) != mode_T) {
3585 insert_remat(si, irn);
3590 for (n=get_irn_arity(irn)-1; n>=0; --n) {
3591 ir_node *arg = get_irn_n(irn, n);
3593 if(op->attr.live_range.args.reloads && op->attr.live_range.args.reloads[n] != ILP_UNDEF) {
3596 name = si->lpp->vars[op->attr.live_range.args.reloads[n]];
3597 if(!is_zero(name->value)) {
3599 ir_node *insert_pos = irn;
3600 ir_node *prev = sched_prev(insert_pos);
3603 while(be_is_Spill(prev)) {
3604 prev = sched_prev(prev);
3607 prev_op = get_irn_link(prev);
3609 /* insert reload before pre-remats */
3610 while(!sched_is_end(prev) && !be_is_Reload(prev) && !is_Phi(prev)
3611 && prev_op->is_remat && prev_op->attr.remat.pre) {
3615 prev = sched_prev(prev);
3616 } while(be_is_Spill(prev));
3618 prev_op = get_irn_link(prev);
3622 reload = insert_reload(si, arg, insert_pos);
3624 set_irn_n(irn, n, reload);
3626 #ifdef KEEPALIVE_RELOADS
3627 pset_insert_ptr(si->spills, reload);
3635 del_set(spill_bb->ilp);
3636 if(spill_bb->reloads) del_set(spill_bb->reloads);
3640 walker_collect_used(ir_node * irn, void * data)
3642 lc_bitset_t *used = data;
3644 lc_bitset_set(used, get_irn_idx(irn));
3647 struct kill_helper {
3653 walker_kill_unused(ir_node * bb, void * data)
3655 struct kill_helper *kh = data;
3656 ir_node *bad = get_irg_bad(get_irn_irg(bb));
3660 for(irn=sched_first(bb); !sched_is_end(irn);) {
3661 ir_node *next = sched_next(irn);
3664 if(!lc_bitset_is_set(kh->used, get_irn_idx(irn))) {
3665 if(be_is_Spill(irn) || be_is_Reload(irn)) {
3666 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)));
3668 assert(lpp_get_sol_state(kh->si->lpp) != lpp_optimal && "optimal solution is suboptimal?");
3674 set_nodes_block(irn, bad);
3675 for (n=get_irn_arity(irn)-1; n>=0; --n) {
3676 set_irn_n(irn, n, bad);
3684 kill_all_unused_values_in_schedule(spill_ilp_t * si)
3686 struct kill_helper kh;
3688 kh.used = lc_bitset_malloc(get_irg_last_idx(si->chordal_env->irg));
3691 irg_walk_graph(si->chordal_env->irg, walker_collect_used, NULL, kh.used);
3692 irg_block_walk_graph(si->chordal_env->irg, walker_kill_unused, NULL, &kh);
3694 lc_bitset_free(kh.used);
3698 print_irn_pset(pset * p)
3702 pset_foreach(p, irn) {
3703 ir_printf("%+F\n", irn);
3708 dump_phi_class(spill_ilp_t * si, pset * phiclass, const char * file)
3710 FILE *f = fopen(file, "w");
3712 interference_t *interference;
3714 pset_break(phiclass);
3715 set_break(si->interferences);
3717 ir_fprintf(f, "digraph phiclass {\n");
3719 pset_foreach(phiclass, irn) {
3721 ir_fprintf(f, " %F%N [shape=box]\n",irn,irn);
3724 pset_foreach(phiclass, irn) {
3727 if(!is_Phi(irn)) continue;
3729 for(n=get_irn_arity(irn)-1; n>=0; --n) {
3730 ir_node *arg = get_irn_n(irn, n);
3732 ir_fprintf(f, " %F%N -> %F%N\n",irn,irn,arg,arg);
3736 set_foreach(si->interferences, interference) {
3737 const ir_node *a = interference->a;
3738 const ir_node *b = interference->b;
3739 if(get_phi_class(a) == phiclass) {
3740 ir_fprintf(f, " %F%N -> %F%N [color=red,dir=none,style=bold]\n",a,a,b,b);
3749 rewire_uses(spill_ilp_t * si)
3751 dom_front_info_t *dfi = be_compute_dominance_frontiers(si->chordal_env->irg);
3753 pset *ignore = pset_new_ptr(1);
3755 pset_insert_ptr(ignore, get_irg_end(si->chordal_env->irg));
3757 /* then fix uses of spills */
3758 set_foreach(si->values, defs) {
3761 const ir_node *next = defs->remats;
3764 reloads = pset_new_ptr_default();
3767 if(be_is_Reload(next)) {
3768 pset_insert_ptr(reloads, next);
3772 next = get_irn_link(next);
3775 spills = get_spills_for_value(si, defs->value);
3776 DBG((si->dbg, LEVEL_2, "\t %d remats, %d reloads, and %d spills for value %+F\n", remats, pset_count(reloads), pset_count(spills), defs->value));
3777 if(pset_count(spills) > 1) {
3778 //assert(pset_count(reloads) > 0);
3779 // print_irn_pset(spills);
3780 // print_irn_pset(reloads);
3782 be_ssa_constr_set_ignore(dfi, si->lv, spills, ignore);
3789 /* first fix uses of remats and reloads */
3790 set_foreach(si->values, defs) {
3792 const ir_node *next = defs->remats;
3795 nodes = pset_new_ptr_default();
3796 pset_insert_ptr(nodes, defs->value);
3799 pset_insert_ptr(nodes, next);
3800 next = get_irn_link(next);
3803 if(pset_count(nodes) > 1) {
3804 DBG((si->dbg, LEVEL_4, "\t %d new definitions for value %+F\n", pset_count(nodes)-1, defs->value));
3805 be_ssa_constr_set(dfi, si->lv, nodes);
3812 // remove_unused_defs(si);
3814 be_free_dominance_frontiers(dfi);
3819 writeback_results(spill_ilp_t * si)
3821 /* walk through the graph and collect all spills, reloads and remats for a value */
3823 si->values = new_set(cmp_defs, 4096);
3825 DBG((si->dbg, LEVEL_1, "Applying results\n"));
3826 delete_unnecessary_remats(si);
3827 si->m_unknown = new_r_Unknown(si->chordal_env->irg, mode_M);
3828 irg_block_walk_graph(si->chordal_env->irg, walker_spill_placer, NULL, si);
3829 irg_block_walk_graph(si->chordal_env->irg, walker_reload_placer, NULL, si);
3830 #ifdef WITH_MEMOPERANDS
3831 insert_memoperands(si);
3835 /* clean the remat info! there are still back-edges leading there! */
3836 clean_remat_info(si);
3840 connect_all_spills_with_keep(si);
3842 del_set(si->values);
3846 get_n_regs(spill_ilp_t * si)
3848 int arch_n_regs = arch_register_class_n_regs(si->cls);
3852 for(i=0; i<arch_n_regs; i++) {
3853 if(!arch_register_type_is(&si->cls->regs[i], ignore)) {
3858 DBG((si->dbg, LEVEL_1, "\tArchitecture has %d free registers in class %s\n", free, si->cls->name));
3863 walker_reload_mover(ir_node * bb, void * data)
3865 spill_ilp_t *si = data;
3868 sched_foreach(bb, tmp) {
3869 if(be_is_Reload(tmp) && has_reg_class(si, tmp)) {
3870 ir_node *reload = tmp;
3873 /* move reload upwards */
3875 int pressure = (int)get_irn_link(reload);
3876 if(pressure < si->n_regs) {
3877 irn = sched_prev(reload);
3878 DBG((si->dbg, LEVEL_5, "regpressure before %+F: %d\n", reload, pressure));
3879 sched_remove(reload);
3880 pressure = (int)get_irn_link(irn);
3882 while(pressure < si->n_regs) {
3883 if( sched_is_end(irn) ||
3884 (be_is_Reload(irn) && has_reg_class(si, irn)) ||
3885 /* do not move reload before its spill */
3886 (irn == be_get_Reload_mem(reload)) ||
3887 /* do not move before phi */
3890 set_irn_link(irn, INT_TO_PTR(pressure+1));
3891 DBG((si->dbg, LEVEL_5, "new regpressure before %+F: %d\n", irn, pressure+1));
3892 irn = sched_prev(irn);
3894 pressure = (int)get_irn_link(irn);
3897 DBG((si->dbg, LEVEL_3, "putting reload %+F after %+F\n", reload, irn));
3898 sched_put_after(irn, reload);
3905 move_reloads_upward(spill_ilp_t * si)
3907 irg_block_walk_graph(si->chordal_env->irg, walker_reload_mover, NULL, si);
3912 * Walk all irg blocks and check for interfering spills inside of phi classes
3915 luke_meminterferencechecker(ir_node * bb, void * data)
3917 spill_ilp_t *si = (spill_ilp_t*)data;
3920 be_lv_foreach(si->lv, bb, be_lv_state_end | be_lv_state_out | be_lv_state_in, l1) {
3921 ir_node *a = be_lv_get_irn(si->lv, bb, l1);
3923 if(!be_is_Spill(a) && (!is_Phi(a) || get_irn_mode(a) != mode_T)) continue;
3925 /* a is only interesting if it is in my register class and if it is inside a phi class */
3926 if (has_reg_class(si, a) && get_phi_class(a)) {
3927 for(l2=_be_lv_next_irn(si->lv, bb, 0xff, l1+1); l2>=0; l2=_be_lv_next_irn(si->lv, bb, 0xff, l2+1)) {
3928 ir_node *b = be_lv_get_irn(si->lv, bb, l2);
3930 if(!be_is_Spill(b) && (!is_Phi(b) || get_irn_mode(b) != mode_T)) continue;
3932 /* a and b are only interesting if they are in the same phi class */
3933 if(has_reg_class(si, b) && get_phi_class(a) == get_phi_class(b)) {
3934 if(values_interfere_in_block(si, bb, a, b)) {
3935 ir_fprintf(stderr, "$$ Spills interfere in %+F: %+F, %+F \t$$\n", bb, a, b);
3944 verify_phiclasses(spill_ilp_t * si)
3946 /* analyze phi classes */
3947 phi_class_compute(si->chordal_env->irg);
3949 DBG((si->dbg, LEVEL_2, "\t calling memory interference checker\n"));
3950 irg_block_walk_graph(si->chordal_env->irg, luke_meminterferencechecker, NULL, si);
3954 walker_spillslotassigner(ir_node * irn, void * data)
3958 if(!be_is_Spill(irn)) return;
3960 /* set spill context to phi class if it has one ;) */
3962 cls = get_phi_class(irn);
3964 be_set_Spill_context(irn, cls);
3966 be_set_Spill_context(irn, irn);
3971 assign_spillslots(spill_ilp_t * si)
3973 DBG((si->dbg, LEVEL_2, "\t calling spill slot assigner\n"));
3974 irg_walk_graph(si->chordal_env->irg, walker_spillslotassigner, NULL, si);
3978 be_spill_remat(const be_chordal_env_t * chordal_env)
3980 char problem_name[256];
3981 char dump_suffix[256];
3982 char dump_suffix2[256];
3983 struct obstack obst;
3986 ir_snprintf(problem_name, sizeof(problem_name), "%F_%s", chordal_env->irg, chordal_env->cls->name);
3987 ir_snprintf(dump_suffix, sizeof(dump_suffix), "-%s-remats", chordal_env->cls->name);
3988 ir_snprintf(dump_suffix2, sizeof(dump_suffix2), "-%s-pressure", chordal_env->cls->name);
3990 FIRM_DBG_REGISTER(si.dbg, "firm.be.ra.spillremat");
3991 DBG((si.dbg, LEVEL_1, "\n\n\t\t===== Processing %s =====\n\n", problem_name));
3993 #ifdef VERIFY_DOMINANCE
3994 be_check_dominance(chordal_env->irg);
3997 obstack_init(&obst);
3998 si.chordal_env = chordal_env;
4000 si.cls = chordal_env->cls;
4001 si.lpp = new_lpp(problem_name, lpp_minimize);
4002 si.remat_info = new_set(cmp_remat_info, 4096);
4003 si.interferences = new_set(cmp_interference, 32);
4004 #ifdef WITH_MEMOPERANDS
4005 si.memoperands = new_set(cmp_memoperands, 128);
4007 si.all_possible_remats = pset_new_ptr_default();
4008 si.spills = pset_new_ptr_default();
4009 si.inverse_ops = pset_new_ptr_default();
4010 si.lv = chordal_env->lv;
4014 si.n_regs = get_n_regs(&si);
4016 set_irg_link(chordal_env->irg, &si);
4017 compute_doms(chordal_env->irg);
4019 /* compute phi classes */
4020 // phi_class_compute(chordal_env->irg);
4022 be_analyze_regpressure(chordal_env, "-pre");
4024 #ifdef COLLECT_REMATS
4025 /* collect remats */
4026 DBG((si.dbg, LEVEL_1, "Collecting remats\n"));
4027 irg_walk_graph(chordal_env->irg, walker_remat_collector, NULL, &si);
4030 /* insert possible remats */
4031 DBG((si.dbg, LEVEL_1, "Inserting possible remats\n"));
4032 irg_block_walk_graph(chordal_env->irg, walker_remat_insertor, NULL, &si);
4033 DBG((si.dbg, LEVEL_2, " -> inserted %d possible remats\n", pset_count(si.all_possible_remats)));
4036 DBG((si.dbg, LEVEL_1, "Connecting remats with keep and dumping\n"));
4037 connect_all_remats_with_keep(&si);
4038 /* dump graph with inserted remats */
4039 dump_graph_with_remats(chordal_env->irg, dump_suffix);
4042 /* insert copies for phi arguments not in my regclass */
4043 irg_walk_graph(chordal_env->irg, walker_regclass_copy_insertor, NULL, &si);
4045 /* recompute liveness */
4046 DBG((si.dbg, LEVEL_1, "Recomputing liveness\n"));
4047 be_liveness_recompute(si.lv);
4051 DBG((si.dbg, LEVEL_1, "\tBuilding ILP\n"));
4052 DBG((si.dbg, LEVEL_2, "\t endwalker\n"));
4053 irg_block_walk_graph(chordal_env->irg, luke_endwalker, NULL, &si);
4055 DBG((si.dbg, LEVEL_2, "\t blockwalker\n"));
4056 irg_block_walk_graph(chordal_env->irg, luke_blockwalker, NULL, &si);
4058 #ifndef NO_MEMCOPIES
4059 DBG((si.dbg, LEVEL_2, "\t memcopyhandler\n"));
4060 memcopyhandler(&si);
4068 ir_snprintf(buf, sizeof(buf), "%s-spillremat.ilp", problem_name);
4069 if ((f = fopen(buf, "wt")) != NULL) {
4070 lpp_dump_plain(si.lpp, f);
4077 DBG((si.dbg, LEVEL_1, "\tSolving %F\n", chordal_env->irg));
4079 lpp_set_time_limit(si.lpp, ILP_TIMEOUT);
4083 lpp_solve_cplex(si.lpp);
4085 lpp_solve_net(si.lpp, LPP_SERVER, LPP_SOLVER);
4087 assert(lpp_is_sol_valid(si.lpp)
4088 && "solution of ILP must be valid");
4090 DBG((si.dbg, LEVEL_1, "\t%s: iterations: %d, solution time: %g, objective function: %g\n", problem_name, si.lpp->iterations, si.lpp->sol_time, is_zero(si.lpp->objval)?0.0:si.lpp->objval));
4092 #ifdef DUMP_SOLUTION
4097 ir_snprintf(buf, sizeof(buf), "%s-spillremat.sol", problem_name);
4098 if ((f = fopen(buf, "wt")) != NULL) {
4100 for (i = 0; i < si.lpp->var_next; ++i) {
4101 lpp_name_t *name = si.lpp->vars[i];
4102 fprintf(f, "%20s %4d %10f\n", name->name, name->nr, name->value);
4109 writeback_results(&si);
4113 kill_all_unused_values_in_schedule(&si);
4115 #if defined(KEEPALIVE_SPILLS) || defined(KEEPALIVE_RELOADS)
4116 be_dump(chordal_env->irg, "-spills-placed", dump_ir_block_graph);
4119 // move reloads upwards
4120 be_liveness_recompute(si.lv);
4121 irg_block_walk_graph(chordal_env->irg, walker_pressure_annotator, NULL, &si);
4122 move_reloads_upward(&si);
4124 #ifndef NO_MEMCOPIES
4125 verify_phiclasses(&si);
4126 assign_spillslots(&si);
4129 irg_block_walk_graph(chordal_env->irg, walker_pressure_annotator, NULL, &si);
4131 dump_pressure_graph(&si, dump_suffix2);
4133 be_analyze_regpressure(chordal_env, "-post");
4135 #ifdef VERIFY_DOMINANCE
4136 be_check_dominance(chordal_env->irg);
4139 free_dom(chordal_env->irg);
4140 del_set(si.interferences);
4141 del_pset(si.inverse_ops);
4142 del_pset(si.all_possible_remats);
4143 #ifdef WITH_MEMOPERANDS
4144 del_set(si.memoperands);
4146 del_pset(si.spills);
4148 obstack_free(&obst, NULL);
4149 DBG((si.dbg, LEVEL_1, "\tdone.\n"));
4152 #else /* WITH_ILP */
4155 only_that_you_can_compile_without_WITH_ILP_defined(void)
4159 #endif /* WITH_ILP */