fixes AST integrity checking

src/kernel_services/ast_queries/filecheck.ml

@@ -1253,6 +1253,7 @@ class check ?(is_normalized=true) what : Visitor.frama_c_visitor =
            | None -> ()
            | Some lv ->
              let tlv = Cil.typeOfLval lv in
+             let tlv = Cil.type_remove_qualifier_attributes tlv in
              if not (Cabs2cil.allow_return_collapse ~tlv ~tf:treturn) then
                check_abort "in call %a, cannot implicitly cast from \
                             function return type %a to type of %a (%a)"

tests/syntax/oracle/volatile_clause.res.oracle

@@ -10,6 +10,11 @@
 /* Generated by Frama-C */
 typedef unsigned int volatile Vunsigned;
 typedef int const Cint;
+enum __anonenum_Enum_1 {
+    e = -1
+};
+typedef enum __anonenum_Enum_1 Enum;
+typedef Enum const CEnum;
 unsigned int g(Vunsigned *q);
 
 unsigned int f(unsigned int volatile *q);
@@ -92,5 +97,23 @@ int wr_ci400(int const volatile *p, int const v);
 /*@ volatile ci100 writes wr_ci100; */
 /*@ volatile ci200 writes wr_ci200; */
 /*@ volatile ci300 writes wr_ci300; */
-/*@ volatile ci400 writes wr_ci400; */
+/*@ volatile ci400 writes wr_ci400;
+*/
+Enum volatile e3;
+Enum wr_e3(Enum volatile *p, Enum const v);
+
+/*@ volatile e3 writes wr_e3;
+*/
+Enum fe(Enum a);
+
+void ge(void)
+{
+  e3 = fe(e3);
+  return;
+}
+
+CEnum volatile ce1;
+CEnum volatile ce2;
+CEnum volatile ce3;
+CEnum volatile ce4;
 

tests/syntax/volatile_clause.i

@@ -59,3 +59,22 @@ int  wr_ci400 (const int volatile *p, const int v) ;
 //@ volatile ci200 writes wr_ci200;
 //@ volatile ci300 writes wr_ci300;
 //@ volatile ci400 writes wr_ci400;
+
+typedef enum { e=-1} Enum;
+volatile Enum e3;
+Enum  wr_e3 (Enum volatile *p, const Enum v) ;
+
+//@ volatile e3 writes wr_e3;
+
+Enum fe(Enum a);
+void ge(void) {
+  e3 = fe(e3);
+}
+
+typedef const Enum CEnum ;
+volatile CEnum ce1, ce2, ce3, ce4;
+
+CEnum wr_ce1 (CEnum volatile *p, const Enum v) ;
+CEnum wr_ce2 (const Enum volatile *p, const Enum v) ;
+Enum  wr_ce3 (CEnum volatile *p, const Enum v) ;
+Enum  wr_ce4 (const Enum volatile *p, const Enum v) ;