Instance EqDec_statement: EqDec statement := eq_dec_statement.
Instance EqDec_external_function: EqDec external_function := eq_dec_external_function.

Lemma semax_Slabel {cs:compspecs} {Espec: OracleKind}
(Gamma:tycontext) (P:environ -> mpred) (c:statement) (Q:ret_assert) l:
@semax cs Espec Gamma P c Q -> @semax cs Espec Gamma P (Slabel l c) Q.