[gcc r13-3731] ada: Remove redundant suppression for non-modified IN OUT parameters

[Marc Poulhi?s <dkm@gcc.gnu.org>]

https://gcc.gnu.org/g:dcc02d3168b4457746f6ab1d8e73cf9d15c6d4e8

commit r13-3731-gdcc02d3168b4457746f6ab1d8e73cf9d15c6d4e8
Author: Piotr Trojanek <trojanek@adacore.com>
Date:   Tue Sep 6 00:24:17 2022 +0200

    ada: Remove redundant suppression for non-modified IN OUT parameters
    
    Non-modified IN OUT parameters are first collected and then filtered by
    examining uses of their enclosing subprograms. In this filtering we
    don't need to look again at properties of the formal parameters
    themselves.
    
    Cleanup related to improved detection of references to uninitialized
    objects; semantics is unaffected.
    
    gcc/ada/
    
            * sem_warn.adb
            (No_Warn_On_In_Out): For subprograms we can simply call
            Warnings_Off.
            (Output_Non_Modified_In_Out_Warnings): Remove repeated
            suppression.

Diff:
---
 gcc/ada/sem_warn.adb | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/gcc/ada/sem_warn.adb b/gcc/ada/sem_warn.adb
index 4552d907bac..1bfa8449ad7 100644
--- a/gcc/ada/sem_warn.adb
+++ b/gcc/ada/sem_warn.adb
@@ -3006,9 +3006,9 @@ package body Sem_Warn is
          then
             return True;
 
-         --  Else test warnings off
+         --  Else test warnings off on the subprogram
 
-         elsif Warnings_Off_Check_Spec (S) then
+         elsif Warnings_Off (S) then
             return True;
 
          --  All tests for suppressing warning failed
@@ -3029,11 +3029,9 @@ package body Sem_Warn is
 
          begin
             --  Suppress warning in specific cases (see details in comments for
-            --  No_Warn_On_In_Out), or if there is a pragma Unmodified.
+            --  No_Warn_On_In_Out).
 
-            if Has_Pragma_Unmodified_Check_Spec (E1)
-              or else No_Warn_On_In_Out (E1)
-            then
+            if No_Warn_On_In_Out (E1) then
                null;
 
             --  Here we generate the warning