13 #include "raw_bitset.h"
15 be_insn_t *be_scan_insn(const be_insn_env_t *env, ir_node *irn)
17 const arch_env_t *arch_env = env->aenv;
18 struct obstack *obst = env->obst;
24 insn = obstack_alloc(obst, sizeof(insn[0]));
25 memset(insn, 0, sizeof(insn[0]));
28 insn->next_insn = sched_next(irn);
29 if(get_irn_mode(irn) == mode_T) {
32 for(p = sched_next(irn); is_Proj(p); p = sched_next(p)) {
33 if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, p)) {
34 o.req = arch_get_register_req(arch_env, p, -1);
37 o.pos = -(get_Proj_proj(p) + 1);
39 o.has_constraints = arch_register_req_is(o.req, limited);
40 obstack_grow(obst, &o, sizeof(o));
42 insn->out_constraints |= o.has_constraints;
43 pre_colored += arch_get_irn_register(arch_env, p) != NULL;
48 } else if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, irn)) {
49 o.req = arch_get_register_req(arch_env, irn, -1);
54 o.has_constraints = arch_register_req_is(o.req, limited);
55 obstack_grow(obst, &o, sizeof(o));
57 insn->out_constraints |= o.has_constraints;
58 pre_colored += arch_get_irn_register(arch_env, irn) != NULL;
62 assert(pre_colored == insn->n_ops && "partly pre-colored nodes not supported");
63 insn->pre_colored = 1;
65 insn->use_start = insn->n_ops;
67 for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
68 ir_node *op = get_irn_n(irn, i);
70 if(!arch_irn_consider_in_reg_alloc(arch_env, env->cls, op))
73 o.req = arch_get_register_req(arch_env, irn, i);
78 o.has_constraints = arch_register_req_is(o.req, limited);
79 obstack_grow(obst, &o, sizeof(o));
81 insn->in_constraints |= o.has_constraints;
84 insn->has_constraints = insn->in_constraints | insn->out_constraints;
85 insn->ops = obstack_finish(obst);
87 /* Compute the admissible registers bitsets. */
88 for (i = 0; i < insn->n_ops; ++i) {
89 be_operand_t *op = &insn->ops[i];
90 const arch_register_req_t *req = op->req;
91 const arch_register_class_t *cls = req->cls;
92 arch_register_req_type_t type = req->type;
94 /* If there is no special requirement, we allow current class here */
95 if (cls == NULL && req->type == arch_register_req_type_none) {
97 type = arch_register_req_type_normal;
100 assert(cls == env->cls);
102 op->regs = bitset_obstack_alloc(obst, env->cls->n_regs);
104 if (type & arch_register_req_type_limited) {
105 rbitset_copy_to_bitset(req->limited, op->regs);
107 arch_put_non_ignore_regs(arch_env, env->cls, op->regs);
108 if (env->ignore_colors)
109 bitset_andnot(op->regs, env->ignore_colors);
116 be_insn_env_t *be_insn_env_init(be_insn_env_t *ie, const be_irg_t *birg,
117 const arch_register_class_t *cls,
118 struct obstack *obst)
120 ie->aenv = be_get_birg_arch_env(birg);
123 ie->ignore_colors = bitset_obstack_alloc(obst, cls->n_regs);
124 be_abi_put_ignore_regs(birg->abi, cls, ie->ignore_colors);