sched_add_before(insn->irn, copy);
set_irn_n(insn->irn, op->pos, copy);
DBG((env->dbg, LEVEL_3, "inserting constr copy %+F for %+F pos %d\n", copy, insn->irn, op->pos));
sched_add_before(insn->irn, copy);
set_irn_n(insn->irn, op->pos, copy);
DBG((env->dbg, LEVEL_3, "inserting constr copy %+F for %+F pos %d\n", copy, insn->irn, op->pos));