Remark val_lessdef_normalize:
  forall v v' ty,
  Val.has_type v ty -> Val.lessdef v v' ->
  Val.lessdef v (Val.load_result (chunk_of_type ty) v').

Lemma subst_loc_part_satisf_lowlong: forall src dst rs ls e e', subst_loc_part (R dst) (R src) Low e = Some e' -> satisf rs ls e' -> satisf rs (Locmap.set (R dst) (Val.loword (ls (R src))) ls) e.