12 #include "raw_bitset.h"
14 be_insn_t *be_scan_insn(const be_insn_env_t *env, ir_node *irn)
16 const arch_env_t *arch_env = env->aenv;
17 struct obstack *obst = env->obst;
23 insn = obstack_alloc(obst, sizeof(insn[0]));
24 memset(insn, 0, sizeof(insn[0]));
27 insn->next_insn = sched_next(irn);
28 if(get_irn_mode(irn) == mode_T) {
31 for(p = sched_next(irn); is_Proj(p); p = sched_next(p)) {
32 if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, p)) {
33 o.req = arch_get_register_req(arch_env, p, -1);
36 o.pos = -(get_Proj_proj(p) + 1);
38 o.has_constraints = arch_register_req_is(o.req, limited);
39 obstack_grow(obst, &o, sizeof(o));
41 insn->out_constraints |= o.has_constraints;
42 pre_colored += arch_get_irn_register(arch_env, p) != NULL;
47 } else if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, irn)) {
48 o.req = arch_get_register_req(arch_env, irn, -1);
53 o.has_constraints = arch_register_req_is(o.req, limited);
54 obstack_grow(obst, &o, sizeof(o));
56 insn->out_constraints |= o.has_constraints;
57 pre_colored += arch_get_irn_register(arch_env, irn) != NULL;
61 assert(pre_colored == insn->n_ops && "partly pre-colored nodes not supported");
62 insn->pre_colored = 1;
64 insn->use_start = insn->n_ops;
66 for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
67 ir_node *op = get_irn_n(irn, i);
69 if(!arch_irn_consider_in_reg_alloc(arch_env, env->cls, op))
72 o.req = arch_get_register_req(arch_env, irn, i);
77 o.has_constraints = arch_register_req_is(o.req, limited);
78 obstack_grow(obst, &o, sizeof(o));
80 insn->in_constraints |= o.has_constraints;
83 insn->has_constraints = insn->in_constraints | insn->out_constraints;
84 insn->ops = obstack_finish(obst);
86 /* Compute the admissible registers bitsets. */
87 for (i = 0; i < insn->n_ops; ++i) {
88 be_operand_t *op = &insn->ops[i];
89 const arch_register_req_t *req = op->req;
90 const arch_register_class_t *cls = req->cls;
91 arch_register_req_type_t type = req->type;
93 /* If there is no special requirement, we allow current class here */
94 if (cls == NULL && req->type == arch_register_req_type_none) {
96 type = arch_register_req_type_normal;
99 assert(cls == env->cls);
101 op->regs = bitset_obstack_alloc(obst, env->cls->n_regs);
103 if (type & arch_register_req_type_limited) {
104 rbitset_copy_to_bitset(req->limited, op->regs);
106 arch_put_non_ignore_regs(arch_env, env->cls, op->regs);
107 if (env->ignore_colors)
108 bitset_andnot(op->regs, env->ignore_colors);
115 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)
117 ie->aenv = birg->main_env->arch_env;
120 ie->ignore_colors = bitset_obstack_alloc(obst, cls->n_regs);
121 be_abi_put_ignore_regs(birg->abi, cls, ie->ignore_colors);