(* Lemma locmap_undef_lessdef: forall ll ls1 ls2, locmap_lessdef ls1 ls2 -> locmap_lessdef (Locmap.undef ll ls1) (Locmap.undef ll ls2).  Lemma locmap_undef_lessdef_1: forall ll ls1 ls2, locmap_lessdef ls1 ls2 -> locmap_lessdef (Locmap.undef ll ls1) ls2. *)

Lemma locmap_undef_caller_save_regs_lessdef:
forall ls1 ls2,
locmap_lessdef ls1 ls2 -> locmap_lessdef (undef_caller_save_regs ls1) (undef_caller_save_regs ls2).