- /* check for a restriction of the result (-1) and the operands (0..n) */
- max = get_irn_arity(irn);
- for(pos=-1; pos<max; ++pos) {
- arch_get_register_req(aenv, &req, irn, pos);
- /* if a restriction is found, insert a perm before the irn */
- if (req.type == arch_register_req_type_limited) {
- insert_Perm_after(menv, cenv->cls, cenv->dom_front, sched_prev(irn));
- break;
+ sched_foreach(bl, irn) {
+ ir_node *perm = NULL;
+
+ /* check for a restriction of the result (-1) or one of the operands (0..n) */
+ max = get_irn_arity(irn);
+ for(pos=-1; pos<max; ++pos) {
+ arch_get_register_req(aenv, &req, irn, pos);
+ /* if a restriction is found, insert a perm before the irn */
+ if (cenv->cls == arch_get_irn_reg_class(aenv, irn, pos) && req.type == arch_register_req_type_limited) {
+
+ if(!perm)
+ perm = insert_Perm_after(menv, cenv->cls, cenv->dom_front, sched_prev(irn));
+
+ /*
+ * Turn an input constraint into an output constraint:
+ * The Proj of the Perm which corresponds to the input
+ * constraint will have the input constraint of the node
+ * as an output constraint
+ */
+ if(pos >= 0) {
+ ir_node *op = get_irn_n(irn, pos);
+
+ /*
+ * The operand must be a proj now, since a perm cut
+ * all live ranges.
+ */
+ assert(is_Proj(op));
+ be_set_Perm_out_req(perm, get_Proj_proj(op), &req);
+ }
+ }