End CallF2B.
Module CallB2F
(Def: CLIGHT_SEPARATION_HOARE_LOGIC_DEF)
(Conseq: CLIGHT_SEPARATION_HOARE_LOGIC_CONSEQUENCE with Module CSHL_Def := Def)
(CallB: CLIGHT_SEPARATION_HOARE_LOGIC_CALL_BACKWARD with Module CSHL_Def := Def):
CLIGHT_SEPARATION_HOARE_LOGIC_CALL_FORWARD with Module CSHL_Def := Def.
Module CSHL_Def := Def.
Module ConseqFacts := GenConseqFacts (Def) (Conseq).

Theorem semax_call_forward: forall {CS: compspecs} {Espec: OracleKind} (Delta: tycontext),
forall A P Q NEP NEQ ts x (F: environ -> mpred) ret argsig retsig cc a bl,
Cop.classify_fun (typeof a) =
Cop.fun_case_f (type_of_params argsig) retsig cc ->
(retsig = Tvoid -> ret = None) ->
tc_fn_return Delta ret retsig ->
@semax CS Espec Delta
((|>((tc_expr Delta a) && (tc_exprlist Delta (snd (split argsig)) bl)))  &&
(`(func_ptr (mk_funspec  (argsig,retsig) cc A P Q NEP NEQ)) (eval_expr a) &&
|>(F * `(P ts x: environ -> mpred) (make_args' (argsig,retsig) (eval_exprlist (snd (split argsig)) bl)))))
(Scall ret a bl)
(normal_ret_assert
(EX old:val, substopt ret (`old) F * maybe_retval (Q ts x) retsig ret)).