#include "bitset.h"
#include "iterator.h"
#include "bipartite.h"
+#include "hungarian.h"
#include "irmode_t.h"
#include "irgraph_t.h"
#include "beutil.h"
#include "besched.h"
-#include "benumb_t.h"
#include "besched_t.h"
#include "belive_t.h"
#include "benode_t.h"
#include "beirgmod.h"
#include "beifg.h"
#include "beinsn_t.h"
+#include "bestatevent.h"
+#include "beirg_t.h"
#include "bechordal_t.h"
#include "bechordal_draw.h"
/* Make a fourcc for border checking. */
#define BORDER_FOURCC FOURCC('B', 'O', 'R', 'D')
+#if 0
static void check_border_list(struct list_head *head)
{
border_t *x;
check_border_list(ent->value);
}
}
-
+#endif
/**
* Add an interval border to the list of a block's list
*/
set_irn_link(irn, def);
- b->magic = BORDER_FOURCC;
- def->magic = BORDER_FOURCC;
+ DEBUG_ONLY(b->magic = BORDER_FOURCC);
+ DEBUG_ONLY(def->magic = BORDER_FOURCC);
}
/*
return res;
}
-static be_insn_t *chordal_scan_insn(be_chordal_alloc_env_t *env, ir_node *irn)
+static be_insn_t *chordal_scan_insn(be_chordal_env_t *env, ir_node *irn)
{
be_insn_env_t ie;
- ie.ignore_colors = env->chordal_env->ignore_colors;
- ie.aenv = env->chordal_env->birg->main_env->arch_env;
- ie.obst = &env->chordal_env->obst;
- ie.cls = env->chordal_env->cls;
+ ie.ignore_colors = env->ignore_colors;
+ ie.aenv = env->birg->main_env->arch_env;
+ ie.obst = &env->obst;
+ ie.cls = env->cls;
return be_scan_insn(&ie, irn);
}
+static ir_node *prepare_constr_insn(be_chordal_env_t *env, ir_node *irn)
+{
+ const arch_env_t *aenv = env->birg->main_env->arch_env;
+ bitset_t *def_constr = bitset_alloca(env->cls->n_regs);
+ bitset_t *tmp = bitset_alloca(env->cls->n_regs);
+ ir_node *bl = get_nodes_block(irn);
+ be_lv_t *lv = env->birg->lv;
+
+ be_insn_t *insn;
+ int i, j;
+
+ for (i = get_irn_arity(irn) - 1; i >= 0; --i) {
+ ir_node *op = get_irn_n(irn, i);
+
+ const arch_register_t *reg;
+ arch_register_req_t req;
+
+ if (arch_get_irn_reg_class(aenv, irn, i) == env->cls) {
+ reg = arch_get_irn_register(aenv, op);
+
+ if (reg && arch_register_type_is(reg, ignore)) {
+ arch_get_register_req(aenv, &req, irn, i);
+
+ if (arch_register_req_is(&req, limited)) {
+ bitset_clear_all(tmp);
+ req.limited(req.limited_env, tmp);
+
+ if (! bitset_is_set(tmp, reg->index)) {
+ ir_node *copy = be_new_Copy(env->cls, env->irg, bl, op);
+ be_stat_ev("constr_copy", 1);
+
+ sched_add_before(irn, copy);
+ set_irn_n(irn, i, copy);
+ DBG((env->dbg, LEVEL_3, "inserting ignore arg copy %+F for %+F pos %d\n", copy, irn, i));
+ }
+ }
+ }
+ }
+ }
+
+ insn = chordal_scan_insn(env, irn);
+
+ if(!insn->has_constraints)
+ goto end;
+
+ /* insert copies for nodes that occur constrained more than once. */
+ for(i = insn->use_start; i < insn->n_ops; ++i) {
+ be_operand_t *op = &insn->ops[i];
+
+ if(op->has_constraints) {
+ for(j = i + 1; j < insn->n_ops; ++j) {
+ be_operand_t *a_op = &insn->ops[j];
+
+ if(a_op->carrier == op->carrier && a_op->has_constraints) {
+ ir_node *copy = be_new_Copy(env->cls, env->irg, bl, op->carrier);
+ be_stat_ev("constr_copy", 1);
+
+ sched_add_before(insn->irn, copy);
+ set_irn_n(insn->irn, a_op->pos, copy);
+ DBG((env->dbg, LEVEL_3, "inserting multiple constr copy %+F for %+F pos %d\n", copy, insn->irn, a_op->pos));
+ }
+ }
+ }
+ }
+
+ /* collect all registers occuring in out constraints. */
+ for(i = 0; i < insn->use_start; ++i) {
+ be_operand_t *op = &insn->ops[i];
+ if(op->has_constraints)
+ bitset_or(def_constr, op->regs);
+ }
+
+ /*
+ insert copies for all constrained arguments living through the node
+ and being constrained to a register which also occurs in out constraints.
+ */
+ for(i = insn->use_start; i < insn->n_ops; ++i) {
+ be_operand_t *op = &insn->ops[i];
+
+ bitset_copy(tmp, op->regs);
+ bitset_and(tmp, def_constr);
+
+ /*
+ Check, if
+ 1) the operand is constrained.
+ 2) lives through the node.
+ 3) is constrained to a register occuring in out constraints.
+ */
+ if(op->has_constraints && values_interfere(lv, insn->irn, op->carrier) && bitset_popcnt(tmp) > 0) {
+ /*
+ only create the copy if the operand is no copy.
+ this is necessary since the assure constraints phase inserts
+ Copies and Keeps for operands which must be different from the results.
+ Additional copies here would destroy this.
+ */
+ if(!be_is_Copy(op->carrier)) {
+ ir_node *copy = be_new_Copy(env->cls, env->irg, bl, op->carrier);
+
+ sched_add_before(insn->irn, copy);
+ set_irn_n(insn->irn, op->pos, copy);
+ DBG((env->dbg, LEVEL_3, "inserting constr copy %+F for %+F pos %d\n", copy, insn->irn, op->pos));
+ be_liveness_update(lv, op->carrier);
+ }
+ }
+ }
+
+end:
+ obstack_free(&env->obst, insn);
+ return insn->next_insn;
+}
+
+static void pre_spill_prepare_constr_walker(ir_node *bl, void *data)
+{
+ be_chordal_env_t *env = data;
+ ir_node *irn;
+ for(irn = sched_first(bl); !sched_is_end(irn);) {
+ irn = prepare_constr_insn(env, irn);
+ }
+}
+
+void be_pre_spill_prepare_constr(be_chordal_env_t *cenv) {
+ irg_block_walk_graph(cenv->irg, pre_spill_prepare_constr_walker, NULL, (void *) cenv);
+}
+
static void pair_up_operands(const be_chordal_alloc_env_t *alloc_env, be_insn_t *insn)
{
const be_chordal_env_t *env = alloc_env->chordal_env;
- int n_uses = be_insn_n_uses(insn);
- int n_defs = be_insn_n_defs(insn);
- bitset_t *bs = bitset_alloca(env->cls->n_regs);
- bipartite_t *bp = bipartite_new(n_defs, n_uses);
- int *pairing = alloca(MAX(n_defs, n_uses) * sizeof(pairing[0]));
+ int n_uses = be_insn_n_uses(insn);
+ int n_defs = be_insn_n_defs(insn);
+ bitset_t *bs = bitset_alloca(env->cls->n_regs);
+ int *pairing = alloca(MAX(n_defs, n_uses) * sizeof(pairing[0]));
+ be_lv_t *lv = env->birg->lv;
int i, j;
For each out operand, try to find an in operand which can be assigned the
same register as the out operand.
*/
- for(j = 0; j < insn->use_start; ++j) {
+ for (j = 0; j < insn->use_start; ++j) {
+ int smallest = -1;
+ int smallest_n_regs = 2 * env->cls->n_regs + 1;
be_operand_t *out_op = &insn->ops[j];
/* Try to find an in operand which has ... */
for(i = insn->use_start; i < insn->n_ops; ++i) {
+ int n_total;
const be_operand_t *op = &insn->ops[i];
- /*
- The in operand can only be paired with a def, if the node defining the
- operand's value does not interfere with the instruction itself. That
- would mean, that it is live at the instruction, so no result of the instruction
- can have the same register as the operand.
-
- Furthermore, tow operands can be paired, if the admissible registers
- of one are a subset of the other's. We record the operand whose constraints
- count in the decisive array.
- */
- if(!values_interfere(op->irn, op->carrier)) {
- if(get_decisive_partner_regs(bs, out_op, op))
- bipartite_add(bp, j, i - insn->use_start);
+ if (! values_interfere(lv, op->irn, op->carrier) && ! op->partner) {
+ bitset_clear_all(bs);
+ bitset_copy(bs, op->regs);
+ bitset_and(bs, out_op->regs);
+ n_total = bitset_popcnt(op->regs) + bitset_popcnt(out_op->regs);
+
+ if (bitset_popcnt(bs) > 0 && n_total < smallest_n_regs) {
+ smallest = i;
+ smallest_n_regs = n_total;
+ }
}
}
- }
- /* Compute the pairing. */
- bipartite_matching(bp, pairing);
- for(i = 0; i < insn->use_start; ++i) {
- int p = pairing[i] + insn->use_start;
-
- if(p >= insn->use_start) {
- insn->ops[i].partner = &insn->ops[p];
- insn->ops[p].partner = &insn->ops[i];
+ if (smallest >= 0) {
+ be_operand_t *partner = &insn->ops[smallest];
+ out_op->partner = partner;
+ partner->partner = out_op;
}
}
-
- bipartite_free(bp);
}
ir_node *perm = NULL;
bitset_t *out_constr = bitset_alloca(env->cls->n_regs);
bitset_t *bs = bitset_alloca(env->cls->n_regs);
+ be_lv_t *lv = env->birg->lv;
DEBUG_ONLY(firm_dbg_module_t *dbg = alloc_env->constr_dbg;)
int i;
bitset_or(out_constr, op->regs);
}
- /*
- Now, figure out which input operand must be copied since it has input
- constraints which are also output constraints.
- */
- for(i = insn->use_start; i < insn->n_ops; ++i) {
- be_operand_t *op = &insn->ops[i];
- if(op->has_constraints && (values_interfere(op->carrier, insn->irn) || arch_irn_is(aenv, op->carrier, ignore))) {
- bitset_copy(bs, op->regs);
- bitset_and(bs, out_constr);
-
- /*
- The operand (interfering with the node) has input constraints
- which also occur as output constraints, so insert a copy.
- */
- if(bitset_popcnt(bs) > 0) {
- copy = be_new_Copy(op->req.cls, env->irg, bl, op->carrier);
- op->carrier = copy;
- sched_add_before(insn->irn, copy);
- set_irn_n(insn->irn, op->pos, op->carrier);
-
- DBG((dbg, LEVEL_2, "adding copy for interfering and constrained op %+F\n", op->carrier));
- }
- }
- }
+ (void) bl;
+ (void) copy;
+ (void) bs;
+ DEBUG_ONLY((void) dbg;)
/*
Make the Perm, recompute liveness and re-scan the insn since the
in operands are now the Projs of the Perm.
*/
- perm = insert_Perm_after(aenv, env->cls, env->dom_front, sched_prev(insn->irn));
+ perm = insert_Perm_after(aenv, lv, env->cls, env->birg->dom_front, sched_prev(insn->irn));
/* Registers are propagated by insert_Perm_after(). Clean them here! */
if(perm) {
const ir_edge_t *edge;
+ be_stat_ev("constr_perm", get_irn_arity(perm));
foreach_out_edge(perm, edge) {
ir_node *proj = get_edge_src_irn(edge);
arch_set_irn_register(aenv, proj, NULL);
the Perm. Recomputing liveness is also a good idea if a Perm is inserted, since
the live sets may change.
*/
- be_liveness(env->irg);
+ // be_liveness_recompute(lv);
obstack_free(&env->obst, insn);
- *the_insn = insn = chordal_scan_insn(alloc_env, insn->irn);
+ *the_insn = insn = chordal_scan_insn(env, insn->irn);
/*
Copy the input constraints of the insn to the Perm as output
{
be_chordal_env_t *env = alloc_env->chordal_env;
void *base = obstack_base(&env->obst);
- be_insn_t *insn = chordal_scan_insn(alloc_env, irn);
+ be_insn_t *insn = chordal_scan_insn(env, irn);
ir_node *res = insn->next_insn;
int be_silent = *silent;
+ be_lv_t *lv = env->birg->lv;
if(insn->pre_colored) {
int i;
int n_regs = env->cls->n_regs;
bitset_t *bs = bitset_alloca(n_regs);
ir_node **alloc_nodes = alloca(n_regs * sizeof(alloc_nodes[0]));
- bipartite_t *bp = bipartite_new(n_regs, n_regs);
+ hungarian_problem_t *bp= hungarian_new(n_regs, n_regs, 2, HUNGARIAN_MATCH_PERFECT);
+// bipartite_t *bp = bipartite_new(n_regs, n_regs);
int *assignment = alloca(n_regs * sizeof(assignment[0]));
pmap *partners = pmap_create();
DEBUG_ONLY(firm_dbg_module_t *dbg = alloc_env->constr_dbg;)
long col;
const ir_edge_t *edge;
ir_node *perm = NULL;
+ int match_res, cost;
/*
prepare the constraint handling of this node.
DBG((dbg, LEVEL_2, "\tallowed registers for %+F: %B\n", op->carrier, bs));
bitset_foreach(bs, col)
- bipartite_add(bp, n_alloc, col);
+ hungarian_add(bp, n_alloc, col, 1);
+// bipartite_add(bp, n_alloc, col);
n_alloc++;
}
}
/*
- Put all nodes which live by the constrained instruction also to the
+ Put all nodes which live through the constrained instruction also to the
allocation bipartite graph. They are considered unconstrained.
*/
if(perm) {
assert(is_Proj(proj));
- if(values_interfere(proj, irn) && !pmap_contains(partners, proj)) {
+ if(values_interfere(lv, proj, irn) && !pmap_contains(partners, proj)) {
assert(n_alloc < n_regs);
alloc_nodes[n_alloc] = proj;
pmap_insert(partners, proj, NULL);
bitset_clear_all(bs);
arch_put_non_ignore_regs(aenv, env->cls, bs);
+ bitset_andnot(bs, env->ignore_colors);
bitset_foreach(bs, col)
- bipartite_add(bp, n_alloc, col);
+ hungarian_add(bp, n_alloc, col, 1);
+// bipartite_add(bp, n_alloc, col);
n_alloc++;
}
}
/* Compute a valid register allocation. */
- bipartite_matching(bp, assignment);
+ hungarian_prepare_cost_matrix(bp, HUNGARIAN_MODE_MAXIMIZE_UTIL);
+ match_res = hungarian_solve(bp, assignment, &cost, 1);
+ assert(match_res == 0 && "matching failed");
+ //bipartite_matching(bp, assignment);
/* Assign colors obtained from the matching. */
for(i = 0; i < n_alloc; ++i) {
continue;
arch_set_irn_register(aenv, nodes[j], reg);
- pset_hinsert_ptr(alloc_env->pre_colored, nodes[j]);
+ (void) pset_hinsert_ptr(alloc_env->pre_colored, nodes[j]);
DBG((dbg, LEVEL_2, "\tsetting %+F to register %s\n", nodes[j], reg->name));
}
}
}
}
- bipartite_free(bp);
+ //bipartite_free(bp);
+ hungarian_free(bp);
pmap_destroy(partners);
}
be_chordal_env_t *env = alloc_env->chordal_env;
bitset_t *live = alloc_env->live;
ir_node *irn;
+ be_lv_t *lv = env->birg->lv;
DEBUG_ONLY(firm_dbg_module_t *dbg = env->dbg;)
int i, n;
unsigned step = 0;
unsigned pressure = 0;
struct list_head *head;
- pset *live_in = put_live_in(block, pset_new_ptr_default());
- pset *live_end = put_live_end(block, pset_new_ptr_default());
+ pset *live_in = be_lv_pset_put_in(lv, block, pset_new_ptr_default());
+ pset *live_end = be_lv_pset_put_end(lv, block, pset_new_ptr_default());
DBG((dbg, LEVEL_1, "Computing pressure in block %+F\n", block));
bitset_clear_all(live);
bitset_t *in_colors = alloc_env->in_colors;
const arch_env_t *arch_env = env->birg->main_env->arch_env;
struct list_head *head = get_block_border_head(env, block);
- pset *live_in = put_live_in(block, pset_new_ptr_default());
+ be_lv_t *lv = env->birg->lv;
+ pset *live_in = be_lv_pset_put_in(lv, block, pset_new_ptr_default());
const ir_node *irn;
border_t *b;
}
/*
- * Mind that the sequence
- * of defs from back to front defines a perfect
+ * Mind that the sequence of defs from back to front defines a perfect
* elimination order. So, coloring the definitions from first to last
* will work.
*/
* Assign a color, if it is a local def. Global defs already have a
* color.
*/
- if(b->is_def && !is_live_in(block, irn)) {
+ if(b->is_def && !be_is_live_in(lv, block, irn)) {
const arch_register_t *reg;
int col = NO_COLOR;
{
be_chordal_alloc_env_t env;
char buf[256];
+ be_irg_t *birg = chordal_env->birg;
int colors_n = arch_register_class_n_regs(chordal_env->cls);
ir_graph *irg = chordal_env->irg;
+ be_assure_dom_front(birg);
+ be_assure_liveness(birg);
assure_doms(irg);
env.chordal_env = chordal_env;
be_dump(chordal_env->irg, buf, dump_ir_block_graph_sched);
}
- be_numbering(irg);
env.live = bitset_malloc(get_irg_last_idx(chordal_env->irg));
/* First, determine the pressure */
/* Assign the colors */
dom_tree_walk_irg(irg, assign, NULL, &env);
- be_numbering_done(irg);
-
if(chordal_env->opts->dump_flags & BE_CH_DUMP_TREE_INTV) {
plotter_t *plotter;
ir_snprintf(buf, sizeof(buf), "ifg_%s_%F.eps", chordal_env->cls->name, irg);
projects / libfirm / blobdiff