[gcc r12-1626] [Ada] Warn about overlapping actuals in all versions of Ada

[Pierre-Marie de Rodat <pmderodat@gcc.gnu.org>]

https://gcc.gnu.org/g:1be46d12a7b76e62f25f3e4e148cda3a6c8948c3

commit r12-1626-g1be46d12a7b76e62f25f3e4e148cda3a6c8948c3
Author: Piotr Trojanek <trojanek@adacore.com>
Date:   Wed Mar 17 13:36:50 2021 +0100

    [Ada] Warn about overlapping actuals in all versions of Ada
    
    gcc/ada/
    
            * sem_warn.adb (Warn_On_Overlapping_Actuals): Cleanup conditions
            related to Ada_Version.

Diff:
---
 gcc/ada/sem_warn.adb | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/gcc/ada/sem_warn.adb b/gcc/ada/sem_warn.adb
index 4ec96fc3c9d..23f27711b5a 100644
--- a/gcc/ada/sem_warn.adb
+++ b/gcc/ada/sem_warn.adb
@@ -3725,11 +3725,6 @@ package body Sem_Warn is
    --  Start of processing for Warn_On_Overlapping_Actuals
 
    begin
-
-      if Ada_Version < Ada_2012 and then not Warn_On_Overlap then
-         return;
-      end if;
-
       --  Exclude calls rewritten as enumeration literals
 
       if Nkind (N) not in N_Subprogram_Call | N_Entry_Call_Statement then
@@ -3823,14 +3818,13 @@ package body Sem_Warn is
                   then
                      null;
 
-                  --  Under Ada 2012 we only report warnings on overlapping
-                  --  arrays and record types if switch is set.
+                  --  We only report warnings on overlapping arrays and record
+                  --  types if switch is set.
 
-                  elsif Ada_Version >= Ada_2012
+                  elsif not Warn_On_Overlap
                     and then not (Is_Elementary_Type (Etype (Form1))
                                     and then
                                   Is_Elementary_Type (Etype (Form2)))
-                    and then not Warn_On_Overlap
                   then
                      null;
 
@@ -3844,7 +3838,7 @@ package body Sem_Warn is
 
                        Ada_Version < Ada_2012
 
-                       --  Overlap is only illegal in Ada 2012 in the case of
+                       --  Overlap is only illegal since Ada 2012 and only for
                        --  elementary types (passed by copy). For other types
                        --  we always have a warning in all versions. This is
                        --  clarified by AI12-0216.