#include <malloc.h>
#endif
+#include "debug.h"
#include "xmalloc.h"
-#include "becopyopt.h"
+#include "becopyopt_t.h"
#include "becopystat.h"
+#include "benodesets.h"
#include "bitset.h"
+#include "raw_bitset.h"
-static firm_dbg_module_t *dbg = NULL;
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
-#define SLOTS_PINNED_GLOBAL 256
+#define SEARCH_FREE_COLORS
+
+#define SLOTS_PINNED_GLOBAL 64
#define SLOTS_CONFLICTS 8
#define SLOTS_CHANGED_NODES 32
-#define MIN(a,b) ((a<b)?(a):(b))
#define list_entry_queue(lh) list_entry(lh, qnode_t, queue)
-#define HASH_CONFLICT(c) (HASH_PTR(c.n1) ^ HASH_PTR(c.n2))
+#define HASH_CONFLICT(c) (nodeset_hash(c.n1) ^ nodeset_hash(c.n2))
/**
* Modeling additional conflicts between nodes. NOT live range interference
static pset *pinned_global; /**< optimized nodes should not be altered any more */
+static INLINE int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
+{
+ if(env->ifg)
+ return be_ifg_connected(env->ifg, a, b);
+ else
+ return values_interfere(env->birg->lv, a, b);
+}
+
static int set_cmp_conflict_t(const void *x, const void *y, size_t size) {
const conflict_t *xx = x;
const conflict_t *yy = y;
static INLINE int qnode_are_conflicting(const qnode_t *qn, const ir_node *n1, const ir_node *n2) {
conflict_t c;
/* search for live range interference */
- if (n1!=n2 && nodes_interfere(qn->ou->co->chordal_env, n1, n2))
+ if (n1!=n2 && nodes_interfere(qn->ou->co->cenv, n1, n2))
return 1;
/* search for recoloring conflicts */
if ((int)n1 < (int)n2) {
static INLINE node_stat_t *qnode_find_node(const qnode_t *qn, ir_node *irn) {
node_stat_t find;
find.irn = irn;
- return set_find(qn->changed_nodes, &find, sizeof(find), HASH_PTR(irn));
+ return set_find(qn->changed_nodes, &find, sizeof(find), nodeset_hash(irn));
}
/**
find.irn = irn;
find.new_color = NO_COLOR;
find.pinned_local = 0;
- return set_insert(qn->changed_nodes, &find, sizeof(find), HASH_PTR(irn));
+ return set_insert(qn->changed_nodes, &find, sizeof(find), nodeset_hash(irn));
}
/**
found->new_color = get_irn_col(qn->ou->co, irn);
}
+
/**
* Possible return values of qnode_color_irn()
*/
* Performs virtual re-coloring of node @p n to color @p col. Virtual colors of
* other nodes are changed too, as required to preserve correctness. Function is
* aware of local and global pinning. Recursive.
- * @param irn The node to set the color for
- * @param col The color to set
+ *
+ * If irn == trigger the color @p col must be used. (the first recoloring)
+ * If irn != trigger an arbitrary free color may be used. If no color is free, @p col is used.
+ *
+ * @param irn The node to set the color for
+ * @param col The color to set
* @param trigger The irn that caused the wish to change the color of the irn
+ * External callers must call with trigger = irn
+ *
* @return CHANGE_SAVE iff setting the color is possible, with all transitive effects.
* CHANGE_IMPOSSIBLE iff conflicts with reg-constraintsis occured.
* Else the first conflicting ir_node encountered is returned.
*
- * ASSUMPTION: Assumes that a life range of a single value can't be split into
- * several smaller intervals where other values can live in between.
- * This should be true in SSA.
*/
static ir_node *qnode_color_irn(const qnode_t *qn, ir_node *irn, int col, const ir_node *trigger) {
- const be_chordal_env_t *chordal_env = qn->ou->co->chordal_env;
- const arch_register_class_t *cls = chordal_env->cls;
- const arch_env_t *arch_env = chordal_env->main_env->arch_env;
+ copy_opt_t *co = qn->ou->co;
+ const be_chordal_env_t *chordal_env = co->cenv;
+ const arch_register_class_t *cls = co->cls;
+ const arch_env_t *arch_env = co->aenv;
int irn_col = qnode_get_new_color(qn, irn);
+ ir_node *sub_res, *curr;
+ be_ifg_t *ifg = chordal_env->ifg;
+ void *iter = be_ifg_neighbours_iter_alloca(ifg);
+
DBG((dbg, LEVEL_3, "\t %+F \tcaused col(%+F) \t%2d --> %2d\n", trigger, irn, irn_col, col));
+ /* If the target color is already set do nothing */
if (irn_col == col) {
DBG((dbg, LEVEL_3, "\t %+F same color\n", irn));
return CHANGE_SAVE;
}
+
+ /* If the irn is pinned, changing color is impossible */
if (pset_find_ptr(pinned_global, irn) || qnode_is_pinned_local(qn, irn)) {
DBG((dbg, LEVEL_3, "\t %+F conflicting\n", irn));
return irn;
}
+
+#ifdef SEARCH_FREE_COLORS
+ /* If we resolve conflicts (recursive calls) we can use any unused color.
+ * In case of the first call @p col must be used.
+ */
+ if (irn != trigger) {
+ bitset_t *free_cols = bitset_alloca(cls->n_regs);
+ const arch_register_req_t *req;
+ ir_node *curr;
+ int free_col;
+
+ /* Get all possible colors */
+ bitset_copy(free_cols, co->cenv->ignore_colors);
+ bitset_flip_all(free_cols);
+
+ /* Exclude colors not assignable to the irn */
+ req = arch_get_register_req(arch_env, irn, -1);
+ if (arch_register_req_is(req, limited)) {
+ bitset_t *limited = bitset_alloca(cls->n_regs);
+ rbitset_copy_to_bitset(req->limited, limited);
+ bitset_and(free_cols, limited);
+ }
+
+ /* Exclude the color of the irn, because it must _change_ its color */
+ bitset_clear(free_cols, irn_col);
+
+ /* Exclude all colors used by adjacent nodes */
+ be_ifg_foreach_neighbour(ifg, iter, irn, curr)
+ bitset_clear(free_cols, qnode_get_new_color(qn, curr));
+
+ free_col = bitset_next_set(free_cols, 0);
+
+ if (free_col != -1) {
+ qnode_set_new_color(qn, irn, free_col);
+ return CHANGE_SAVE;
+ }
+ }
+#endif /* SEARCH_FREE_COLORS */
+
+ /* If target color is not allocatable changing color is impossible */
if (!arch_reg_is_allocatable(arch_env, irn, -1, arch_register_for_index(cls, col))) {
DBG((dbg, LEVEL_3, "\t %+F impossible\n", irn));
return CHANGE_IMPOSSIBLE;
}
/*
- * Process all nodes which would conflict with this change
+ * If we arrive here changing color may be possible, but there may be conflicts.
+ * Try to color all conflicting nodes 'curr' with the color of the irn itself.
*/
- {
- be_ifg_t *ifg = chordal_env->ifg;
- void *iter = be_ifg_neighbours_iter_alloca(ifg);
- ir_node *sub_res, *curr;
-
- /*
- * Try to color all conflicting nodes 'curr'
- * with the color of the irn itself.
- */
- be_ifg_foreach_neighbour(ifg, iter, irn, curr) {
- DBG((dbg, LEVEL_3, "\t Confl %+F(%d)\n", curr, qnode_get_new_color(qn, curr)));
- if (qnode_get_new_color(qn, curr) == col && curr != trigger) {
- sub_res = qnode_color_irn(qn, curr, irn_col, irn);
- if (sub_res != CHANGE_SAVE) {
- be_ifg_neighbours_break(ifg, iter);
- return sub_res;
- }
+ be_ifg_foreach_neighbour(ifg, iter, irn, curr) {
+ DBG((dbg, LEVEL_3, "\t Confl %+F(%d)\n", curr, qnode_get_new_color(qn, curr)));
+ if (qnode_get_new_color(qn, curr) == col && curr != trigger) {
+ sub_res = qnode_color_irn(qn, curr, irn_col, irn);
+ if (sub_res != CHANGE_SAVE) {
+ be_ifg_neighbours_break(ifg, iter);
+ return sub_res;
}
}
}
/*
- * If we arrive here, all sub changes have been applied.
- * So it's save to change this irn
+ * If we arrive here, all conflicts were resolved.
+ * So it is save to change this irn
*/
qnode_set_new_color(qn, irn, col);
return CHANGE_SAVE;
}
+
/**
* Tries to set the colors for all members of this queue node;
* to the target color qn->color
qnode_t *qn = xmalloc(sizeof(*qn));
qn->ou = ou;
qn->color = color;
- qn->mis = malloc(ou->node_count * sizeof(*qn->mis));
+ qn->mis = xmalloc(ou->node_count * sizeof(*qn->mis));
qn->conflicts = new_set(set_cmp_conflict_t, SLOTS_CONFLICTS);
qn->changed_nodes = new_set(set_cmp_node_stat_t, SLOTS_CHANGED_NODES);
return qn;
static void ou_optimize(unit_t *ou) {
int i;
qnode_t *curr = NULL, *tmp;
- arch_env_t *aenv = get_arch_env(ou->co);
- const arch_register_class_t *cls = ou->co->chordal_env->cls;
+ const arch_env_t *aenv = ou->co->aenv;
+ const arch_register_class_t *cls = ou->co->cls;
bitset_t *pos_regs = bitset_alloca(cls->n_regs);
- bitset_t *ign_regs = bitset_alloca(cls->n_regs);
DBG((dbg, LEVEL_1, "\tOptimizing unit:\n"));
for (i=0; i<ou->node_count; ++i)
arch_get_allocatable_regs(aenv, ou->nodes[0], -1, pos_regs);
/* exclude ingore colors */
- arch_put_non_ignore_regs(aenv, cls, ign_regs);
- bitset_and(pos_regs, ign_regs);
+ bitset_andnot(pos_regs, ou->co->cenv->ignore_colors);
+
+ assert(bitset_popcnt(pos_regs) != 0 && "No register is allowed for this node !!?");
/* create new qnode */
bitset_foreach(pos_regs, i)
free_qnode(curr);
}
-void co_heur_opt(copy_opt_t *co) {
+int co_solve_heuristic(copy_opt_t *co) {
unit_t *curr;
- dbg = firm_dbg_register("ir.be.copyoptheur");
+ FIRM_DBG_REGISTER(dbg, "ir.be.copyoptheur");
+
+ ASSERT_OU_AVAIL(co);
pinned_global = pset_new_ptr(SLOTS_PINNED_GLOBAL);
list_for_each_entry(unit_t, curr, &co->units, units)
ou_optimize(curr);
del_pset(pinned_global);
+ return 0;
}
projects / libfirm / blobdiff