- insn = obstack_alloc(obst, sizeof(insn[0]));
- memset(insn, 0, sizeof(insn[0]));
-
- insn->next_insn = sched_next(irn);
- if(get_irn_mode(irn) == mode_T) {
- ir_node *p;
-
- for(p = sched_next(irn); is_Proj(p); p = sched_next(p)) {
- if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, p)) {
- o.carrier = p;
- o.irn = irn;
- o.pos = -(get_Proj_proj(p) + 1);
- o.partner = NULL;
- arch_get_register_req(arch_env, &o.req, p, -1);
- obstack_grow(obst, &o, sizeof(o));
- insn->n_ops++;
- insn->has_constraints |= arch_register_req_is(&o.req, limited);
+ if(!o2) {
+ bitset_copy(bs, o1->regs);
+ return bs;
+ }
+
+ assert(o1->req.cls == o2->req.cls);
+
+ if(bitset_contains(o1->regs, o2->regs))
+ bitset_copy(bs, o1->regs);
+ else if(bitset_contains(o2->regs, o1->regs))
+ bitset_copy(bs, o2->regs);
+ else
+ res = NULL;
+
+ return res;
+}
+
+static be_insn_t *chordal_scan_insn(be_chordal_env_t *env, ir_node *irn)
+{
+ be_insn_env_t ie;
+
+ 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));
+ }
+ }