* @author Daniel Grund
* @date 04.01.2005
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include <stdlib.h>
#include <stdio.h>
#include "irouts.h"
#include "irdom.h"
+#include "beutil.h"
+#include "benumb_t.h"
#include "bera_t.h"
#include "bephiopt.h"
#include "phiclass_t.h"
#include "bephicoal_t.h"
+#include "bephicoalilp_t.h"
#include "phistat.h"
+#define DO_HEURISTIC
+#undef DO_OPTIMAL
+
#define DEBUG_LVL SET_LEVEL_1
-#define DO_PHI_STATISTICS
+
+/** checks if two interfering nodes have the same color */
#define CHECK_RESULTS
+/** counts the copies needed before and after optimization */
#define COUNT_COPY_SAVINGS
+/** dumps 2 allocated graphs; before and after opt. */
+#undef DUMP_OPT_DIFF
-#undef DUMP_IRG_PHI_STAT
+#undef DO_PHI_STATISTICS
+#define DUMP_IRG_PHI_STAT
#define DUMP_DIR_PHI_STAT
#define DUMP_ALL_PHI_STAT
-#define PHI_STAT_FILE "all.phistat"
+#define PHI_STAT_FILE "dir.phistat"
#define ENV_PHI_STAT "PHI_STAT"
static firm_dbg_module_t *dbgphi = NULL;
+typedef struct _copies_t {
+ int lb, ub;
+ int count[3]; /* before, after heuristics, after optimality */
+} copies_t;
+
+
static void phi_node_walker(ir_node *node, void *env) {
if (is_Phi(node) && mode_is_datab(get_irn_mode(node)))
pset_insert_ptr((pset *)env, node);
static void node_collector(ir_node *node, void *env) {
+ struct obstack *obst = env;
if (!is_Block(node) && is_allocatable_irn(node))
- obstack_ptr_grow(env, node);
+ obstack_ptr_grow(obst, node);
}
-#ifdef CHECK_RESULTS
static void check_result(ir_graph *irg) {
struct obstack ob;
ir_node **nodes, *n1, *n2;
obstack_init(&ob);
irg_walk_graph(irg, node_collector, NULL, &ob);
+ obstack_ptr_grow(&ob, NULL);
nodes = (ir_node **) obstack_finish(&ob);
- for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i])
+ for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
+ assert(! (is_allocatable_irn(n1) && get_irn_color(n1) == NO_COLOR));
for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o])
if (phi_ops_interfere(n1, n2) && get_irn_color(n1) == get_irn_color(n2)) {
- DBG((dbgphi, 1, "Ouch! %n -- %n\n", n1, n2));
+ DBG((dbgphi, 1, "Ouch!\n %n[%d]in %n\n %n[%d] in %n\n", n1, get_irn_graph_nr(n1), get_nodes_block(n1), n2, get_irn_graph_nr(n2), get_nodes_block(n2)));
assert(0 && "Interfering values have the same color!");
}
+ }
obstack_free(&ob, NULL);
}
-#endif
-#ifdef COUNT_COPY_SAVINGS
-/* TODO: how to count copies in case of phi swapping */
-static int count_copies(pset *all_phi_nodes) {
- int i, max, phi_color, res = 0;
+/**
+ * Init the copies struct lower and upper bound
+ */
+static void init_copies(copies_t *c, pset *all_phi_nodes) {
+ ir_node *phi;
+
+ c->count[0] = c->count[1] = c->count[2] = -1;
+ c->ub = c->lb = 0;
+
+ for (phi = pset_first(all_phi_nodes); phi; phi = pset_next(all_phi_nodes)) {
+ /* upper bound: each argument of a phi node is a potential copy */
+ int i, max = get_irn_arity(phi);
+ c->ub += max;
+ /* lower bound: at least all interfering pairs */
+ for (i = 0; i < max; ++i) {
+ ir_node *arg = get_irn_n(phi, i);
+ if (phi_ops_interfere(phi, arg))
+ c->lb++;
+ }
+ }
+}
+
+
+/**
+ * Count the copies needed with current coloring
+ */
+static void count_copies(copies_t *c, pset *all_phi_nodes, int stage) {
+ int i, max, phi_color;
ir_node *phi;
+ c->count[stage] = 0;
+
for (phi = pset_first(all_phi_nodes); phi; phi = pset_next(all_phi_nodes)) {
phi_color = get_irn_color(phi);
- for (i = 0, max = get_irn_arity(phi); i < max; ++i)
- if (phi_color != get_irn_color(get_irn_n(phi, i)))
- res++;
+ for (i = 0, max = get_irn_arity(phi); i < max; ++i) {
+ ir_node *arg = get_irn_n(phi, i);
+ if (phi_color != get_irn_color(arg)) {
+ c->count[stage]++;
+ DBG((dbgphi, LEVEL_2, "Copy: %n %n\n", phi, arg));
+ }
+ }
}
- return res;
}
-#endif
void be_phi_opt(ir_graph* irg) {
pset *all_phi_nodes, *all_phi_classes;
-#ifdef COUNT_COPY_SAVINGS
- int before, after;
-#endif
+ copies_t *copies;
DBG((dbgphi, 1, "\n\n=======================> IRG: %s\n\n", get_entity_name(get_irg_entity(irg))));
DBG((dbgphi, 1, "-----------------------> Collecting phi stats <-----------------------\n"));
phi_stat_reset();
phi_stat_collect(irg, all_phi_nodes, all_phi_classes);
-# ifdef DUMP_IRG_PHI_STAT
- {
+#ifdef DUMP_IRG_PHI_STAT
char buf[1024];
snprintf(buf, sizeof(buf), "%s.phistat", get_entity_name(get_irg_entity(irg)));
/*phi_stat_dump(buf);*/
phi_stat_dump_pretty(buf);
- }
-# endif
-# ifdef DUMP_DIR_PHI_STAT
- phi_stat_update(PHI_STAT_FILE);
-# endif
-# ifdef DUMP_ALL_PHI_STAT
- phi_stat_update(getenv(ENV_PHI_STAT));
-# endif
+#endif
+#ifdef DUMP_DIR_PHI_STAT
+ phi_stat_update(PHI_STAT_FILE);
+#endif
+#ifdef DUMP_ALL_PHI_STAT
+ phi_stat_update(getenv(ENV_PHI_STAT));
+#endif
#endif
DBG((dbgphi, 1, "-----------------------> Coalescing <---------------------------------\n"));
compute_outs(irg);
compute_doms(irg);
+
+
+#ifdef DUMP_OPT_DIFF
+ dump_allocated_irg(irg, "-before");
+#endif
+#ifdef CHECK_RESULTS
check_result(irg);
+#endif
#ifdef COUNT_COPY_SAVINGS
- before = count_copies(all_phi_nodes);
+ copies = malloc(sizeof(*copies));
+ init_copies(copies, all_phi_nodes);
+ DBG((dbgphi, 0, "Copy bounds : %3d < . < %3d\n", copies->lb, copies->ub));
+ count_copies(copies, all_phi_nodes, 0);
#endif
+
+
+
+#ifdef DO_HEURISTIC
be_phi_coalesce(all_phi_classes);
+#ifdef DUMP_OPT_DIFF
+ dump_allocated_irg(irg, "-heur");
+#endif
#ifdef CHECK_RESULTS
check_result(irg);
#endif
#ifdef COUNT_COPY_SAVINGS
- after = count_copies(all_phi_nodes);
- DBG((dbgphi, 1, "Irg: %s. Copies form %d to %d\n", get_entity_name(get_irg_entity(irg)), before, after));
+ count_copies(copies, all_phi_nodes, 1);
+#endif
+#endif /* DO_HEURISTIC */
+
+
+ if (copies->count[1] == -1 || copies->count[1] > copies->lb) {
+#ifdef DO_OPTIMAL
+ be_phi_coalesce_ilp(irg, all_phi_nodes);
+#ifdef DUMP_OPT_DIFF
+ dump_allocated_irg(irg, "-opt");
+#endif
+#ifdef CHECK_RESULTS
+ check_result(irg);
+#endif
+#ifdef COUNT_COPY_SAVINGS
+ count_copies(copies, all_phi_nodes, 2);
+#endif
+#endif /* DO_OPTIMAL */
+ }
+#ifdef COUNT_COPY_SAVINGS
+ DBG((dbgphi, 0, "Copies before/heur/opt: %3d / %3d / %3d\n", copies->count[0], copies->count[1], copies->count[2]));
#endif
free_dom_and_peace(irg);
}
firm_dbg_set_mask(dbgphi, DEBUG_LVL);
phi_class_init();
+#ifdef DO_HEURISTIC
be_phi_coal_init();
+#endif
+#ifdef DO_OPTIMAL
+ be_phi_coal_ilp_init();
+#endif
}
projects / libfirm / blobdiff