2011-09-26 Eric Botcazou <ebotcazou@adacore.com>
+ Robert Dewar <dewar@adacore.com>
+
+ * sem_ch6.adb (Set_Formal_Mode): Set Can_Never_Be_Null on an IN or IN
+ OUT formal parameter which is of an null-exclusion access subtype.
+
+2011-09-26 Eric Botcazou <ebotcazou@adacore.com>
* gcc-interface/ada-tree.h (DECL_CAN_NEVER_BE_NULL_P): New macro.
* gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Set the flag.
and then Can_Never_Be_Null (Etype (Formal_Id))
then
Set_Is_Known_Non_Null (Formal_Id);
+
+ -- We can also set Can_Never_Be_Null (thus preventing some junk
+ -- access checks) for the case of an IN parameter, which cannot
+ -- be changed, or for an IN OUT parameter, which can be changed but
+ -- not to a null value. But for an OUT parameter, the initial value
+ -- passed in can be null, so we can't set this flag in that case.
+
+ if Ekind (Formal_Id) /= E_Out_Parameter then
+ Set_Can_Never_Be_Null (Formal_Id);
+ end if;
end if;
Set_Mechanism (Formal_Id, Default_Mechanism);