- if(arch_irn_consider_in_reg_alloc(arch_env, env->cls, op)) {
- o.carrier = op;
- o.irn = irn;
- o.pos = i;
- o.partner = NULL;
- arch_get_register_req(arch_env, &o.req, irn, i);
- obstack_grow(obst, &o, sizeof(o));
- insn->n_ops++;
- insn->in_constraints |= arch_register_req_is(&o.req, limited);
+ 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));
+ }
+ }
+ }