[gcc r13-929] [Ada] Add contracts to System.Address_To_Access_Conversions

[gcc r13-929] [Ada] Add contracts to System.Address_To_Access_Conversions

[Pierre-Marie de Rodat]

https://gcc.gnu.org/g:f03f48a3843046a4ee888db3b86c0efe3812e2c7

commit r13-929-gf03f48a3843046a4ee888db3b86c0efe3812e2c7
Author: Joffrey Huguet <huguet@adacore.com>
Date:   Mon May 9 15:25:30 2022 +0200

    [Ada] Add contracts to System.Address_To_Access_Conversions
    
    This patch adds SPARK annotations to subprograms from
    System.Address_To_Access_Conversions. To_Pointer is considered to have
    no global items, if the returned value has no aliases. To_Address is
    forbidden in SPARK because addresses are not handled.
    
    gcc/ada/
    
            * libgnat/s-atacco.ads (To_Pointer): Add Global => null.
            (To_Address): Add SPARK_Mode => Off.

Diff:
---
 gcc/ada/libgnat/s-atacco.ads | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gcc/ada/libgnat/s-atacco.ads b/gcc/ada/libgnat/s-atacco.ads
index 736210dc98b..b3559ffed79 100644
--- a/gcc/ada/libgnat/s-atacco.ads
+++ b/gcc/ada/libgnat/s-atacco.ads
@@ -54,8 +54,10 @@ package System.Address_To_Access_Conversions is
    --  optimizations that may cause unexpected results based on the assumption
    --  of no strict aliasing.
 
-   function To_Pointer (Value : Address)        return Object_Pointer;
-   function To_Address (Value : Object_Pointer) return Address;
+   function To_Pointer (Value : Address)        return Object_Pointer with
+     Global => null;
+   function To_Address (Value : Object_Pointer) return Address with
+     SPARK_Mode => Off;
 
    pragma Import (Intrinsic, To_Pointer);
    pragma Import (Intrinsic, To_Address);