fact: Definition is_ptr_spec := DECLARE _is_ptr WITH x : val PRE [int_or_ptr_type ] PROP (valid_int_or_ptr x) PARAMS (x) GLOBALS () SEP() POST [ tint ] PROP() RETURN(Vint (Int.repr (match x with | Vptr _ _ => 1 | _ => 0 end))) SEP().
imports: VST.veric.rmaps CertiGraph.lib.List_ext CertiGraph.graph.graph_model CertiGraph.CertiGC.GCGraph CertiGraph.CertiGC.spatial_gcgraph CertiGraph.CertiGC.env_graph_gc CertiGraph.msl_ext.iter_sepcon