3 * More experiments on coalescing.
4 * @author Sebastian Hack
13 #include <libcore/lc_opts.h>
14 #include <libcore/lc_opts_enum.h>
15 #endif /* WITH_LIBCORE */
25 #include "bitfiddle.h"
28 #include "irphase_t.h"
29 #include "irgraph_t.h"
36 #include "becopyopt.h"
37 #include "becopyopt_t.h"
38 #include "bechordal_t.h"
39 #include "bejavacoal.h"
46 #define DUMP_ALL 2 * DUMP_AFTER - 1
48 static int dump_flags = 0;
49 static int dbg_level = 0;
52 static const lc_opt_enum_mask_items_t dump_items[] = {
53 { "before", DUMP_BEFORE },
54 { "after", DUMP_AFTER },
59 static lc_opt_enum_mask_var_t dump_var = {
60 &dump_flags, dump_items
63 static const lc_opt_table_entry_t options[] = {
64 LC_OPT_ENT_ENUM_MASK("dump", "dump ifg before, after or after each cloud", &dump_var),
65 LC_OPT_ENT_INT ("dbg", "debug level for the Java coalescer", &dbg_level),
69 void be_co3_register_options(lc_opt_entry_t *grp)
71 lc_opt_entry_t *co3_grp = lc_opt_get_grp(grp, "co3");
72 lc_opt_add_table(co3_grp, options);
77 static void set_admissible_regs(be_java_coal_t *coal, copy_opt_t *co, ir_node *irn, int t_idx, int *col_map)
80 arch_register_req_t req;
81 unsigned n_regs = co->cls->n_regs;
83 // ir_printf("%+F\n", irn);
84 arch_get_register_req(co->aenv, &req, irn, BE_OUT_POS(0));
85 if(arch_register_req_is(&req, limited)) {
86 bitset_t *adm = bitset_alloca(n_regs);
87 req.limited(req.limited_env, adm);
88 for(i = 0; i < n_regs; ++i)
89 if(!bitset_is_set(adm, i) && col_map[i] >= 0) {
90 // printf("\tforbidding color: %d\n", i);
91 be_java_coal_forbid_color(coal, t_idx, col_map[i]);
96 int co_solve_heuristic_java(copy_opt_t *co)
98 be_ifg_t *ifg = co->cenv->ifg;
99 void *nodes_it = be_ifg_nodes_iter_alloca(ifg);
100 void *neigh_it = be_ifg_neighbours_iter_alloca(ifg);
101 bitset_t *nodes = bitset_malloc(get_irg_last_idx(co->irg));
102 unsigned n_regs = co->cenv->cls->n_regs;
105 unsigned i, j, curr_idx;
112 be_java_coal_t *coal;
115 col_map = alloca(n_regs * sizeof(col_map[0]));
116 inv_col_map = alloca(n_regs * sizeof(inv_col_map[0]));
118 memset(inv_col_map, -1, sizeof(inv_col_map[0]) * n_regs);
120 for(i = 0, j = 0; i < n_regs; ++i) {
121 const arch_register_t *reg = &co->cls->regs[i];
123 if(!arch_register_type_is(reg, ignore)) {
130 node_map = malloc((get_irg_last_idx(co->irg) + 1) * sizeof(node_map[0]));
131 inv_node_map = malloc((get_irg_last_idx(co->irg) + 1) * sizeof(inv_node_map[0]));
134 be_ifg_foreach_node(ifg, nodes_it, n) {
135 if(!arch_irn_is(co->aenv, n, ignore)) {
136 int idx = get_irn_idx(n);
137 bitset_set(nodes, idx);
138 node_map[idx] = curr_idx;
139 inv_node_map[curr_idx] = idx;
151 coal = be_java_coal_init("test", curr_idx, j, dbg_level);
153 /* Check, if all neighbours are indeed connected to the node. */
154 be_ifg_foreach_node(ifg, nodes_it, n) {
155 int n_idx = get_irn_idx(n);
156 int t_idx = node_map[n_idx];
158 if(bitset_is_set(nodes, n_idx)) {
159 affinity_node_t *an = get_affinity_info(co, n);
161 ir_snprintf(dbg, sizeof(dbg), "%+F", n);
162 be_java_coal_set_debug(coal, t_idx, dbg);
163 be_java_coal_set_color(coal, t_idx, col_map[arch_get_irn_register(co->aenv, n)->index]);
164 set_admissible_regs(coal, co, n, t_idx, col_map);
165 be_ifg_foreach_neighbour(ifg, neigh_it, n, m) {
166 int m_idx = get_irn_idx(m);
167 int s_idx = node_map[m_idx];
169 if(n_idx < m_idx && bitset_is_set(nodes, m_idx)) {
170 be_java_coal_add_int_edge(coal, s_idx, t_idx);
176 co_gs_foreach_neighb(an, neigh) {
177 int m_idx = get_irn_idx(neigh->irn);
178 int s_idx = node_map[m_idx];
180 if(n_idx < m_idx && bitset_is_set(nodes, m_idx)) {
181 be_java_coal_add_aff_edge(coal, s_idx, t_idx, neigh->costs);
188 if(dump_flags & DUMP_BEFORE) {
190 ir_snprintf(fn, sizeof(fn), "%F-%s-before.dot", co->cenv->irg, co->cenv->cls->name);
191 be_java_coal_dump(coal, fn);
194 be_java_coal_coalesce(coal);
196 be_ifg_foreach_node(ifg, nodes_it, n) {
197 unsigned idx = get_irn_idx(n);
198 if(bitset_is_set(nodes, idx)) {
199 unsigned t_idx = node_map[idx];
200 unsigned col = inv_col_map[be_java_coal_get_color(coal, t_idx)];
201 const arch_register_t *reg;
203 assert(col < n_regs);
204 reg = &co->cls->regs[col];
205 arch_set_irn_register(co->aenv, n, reg);
209 if(dump_flags & DUMP_AFTER) {
211 ir_snprintf(fn, sizeof(fn), "%F-%s-after.dot", co->cenv->irg, co->cenv->cls->name);
212 be_java_coal_dump(coal, fn);
215 be_java_coal_destroy(coal);