10 be_insn_t *be_scan_insn(const be_insn_env_t *env, ir_node *irn)
12 const arch_env_t *arch_env = env->aenv;
13 struct obstack *obst = env->obst;
19 insn = obstack_alloc(obst, sizeof(insn[0]));
20 memset(insn, 0, sizeof(insn[0]));
23 insn->next_insn = sched_next(irn);
24 if(get_irn_mode(irn) == mode_T) {
27 for(p = sched_next(irn); is_Proj(p); p = sched_next(p)) {
28 if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, p)) {
29 arch_get_register_req(arch_env, &o.req, p, -1);
32 o.pos = -(get_Proj_proj(p) + 1);
34 o.has_constraints = arch_register_req_is(&o.req, limited);
35 obstack_grow(obst, &o, sizeof(o));
37 insn->out_constraints |= o.has_constraints;
38 pre_colored += arch_get_irn_register(arch_env, p) != NULL;
45 else if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, irn)) {
46 arch_get_register_req(arch_env, &o.req, irn, -1);
51 o.has_constraints = arch_register_req_is(&o.req, limited);
52 obstack_grow(obst, &o, sizeof(o));
54 insn->out_constraints |= o.has_constraints;
55 pre_colored += arch_get_irn_register(arch_env, irn) != NULL;
58 insn->pre_colored = pre_colored == insn->n_ops && insn->n_ops > 0;
59 insn->use_start = insn->n_ops;
61 for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
62 ir_node *op = get_irn_n(irn, i);
64 if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, op)) {
65 arch_get_register_req(arch_env, &o.req, irn, i);
70 o.has_constraints = arch_register_req_is(&o.req, limited);
71 obstack_grow(obst, &o, sizeof(o));
73 insn->in_constraints |= o.has_constraints;
77 insn->has_constraints = insn->in_constraints | insn->out_constraints;
78 insn->ops = obstack_finish(obst);
80 /* Compute the admissible registers bitsets. */
81 for(i = 0; i < insn->n_ops; ++i) {
82 be_operand_t *op = &insn->ops[i];
84 assert(op->req.cls == env->cls);
85 op->regs = bitset_obstack_alloc(obst, env->cls->n_regs);
87 if(arch_register_req_is(&op->req, limited))
88 op->req.limited(op->req.limited_env, op->regs);
90 arch_put_non_ignore_regs(arch_env, env->cls, op->regs);
91 if(env->ignore_colors)
92 bitset_andnot(op->regs, env->ignore_colors);
100 be_insn_env_t *be_insn_env_init(be_insn_env_t *ie, const be_irg_t *birg, const arch_register_class_t *cls, struct obstack *obst)
102 ie->aenv = birg->main_env->arch_env;
105 ie->ignore_colors = bitset_obstack_alloc(obst, cls->n_regs);
106 be_abi_put_ignore_regs(birg->abi, cls, ie->ignore_colors);