This patch does not affect the behavior of Ada-only code but improves
consistency with the code generated by the C++ compiler.
Tested on x86_64-pc-linux-gnu, committed on trunk
2018-09-26 Javier Miranda <mira...@adacore.com>
gcc/ada/
* sem_res.adb (Resolve_Actuals): If the formal is a class-wide
type conversion then do not skip resolving and expanding the
conversion; required to displace the pointer to the object and
reference the dispatch table associated with the target
interface type.--- gcc/ada/sem_res.adb
+++ gcc/ada/sem_res.adb
@@ -3809,6 +3809,7 @@ package body Sem_Res is
if Ekind (F) /= E_In_Parameter
and then Nkind (A) = N_Type_Conversion
and then not Is_Class_Wide_Type (Etype (Expression (A)))
+ and then not Is_Interface (Etype (A))
then
if Ekind (F) = E_In_Out_Parameter
and then Is_Array_Type (Etype (F))
