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_pair_satisf_makelong:
forall env src1 src2 dst rs ls e e',
subst_loc_pair (R dst) (R src1) (R src2) e = Some e' ->
long_type_compat env (R dst) e = true ->
wt_regset env rs ->
satisf rs ls e' ->
Archi.ptr64 = false ->
satisf rs (Locmap.set (R dst) (Val.longofwords (ls (R src1)) (ls (R src2))) ls) e.