[COMMITTED] ada: Remove explicit decoration of wrapper created in freezing

["Marc Poulhiès" <poulhies@adacore.com>]

From: Piotr Trojanek <trojanek@adacore.com>

We create wrapper functions associated with inherited functions with
controlling results which are not overridden during freezing. We partly
decorated them explicitly, even though they would be fully decorated
later anyway.

This early decoration didn't work as expected, because flag
In_Private_Part that is read by Override_Dispatching_Operation it not
set reliably while freezing (as explained in the comment of
Is_Private_Declaration). In effect, we were getting a circularity
between Alias and Overridden_Operation, which was causing GNATprove to
loop infinitely.

Apparently the cleanest fix is to not decorate the wrapper with an early
call to Override_Dispatching_Operation.

gcc/ada/

	* exp_ch3.adb (Make_Controlling_Function_Wrappers): Remove early
	decoration.

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/ada/exp_ch3.adb | 2 --
 1 file changed, 2 deletions(-)

diff --git a/gcc/ada/exp_ch3.adb b/gcc/ada/exp_ch3.adb
index f8c99470dd7..91dcfa0f643 100644
--- a/gcc/ada/exp_ch3.adb
+++ b/gcc/ada/exp_ch3.adb
@@ -11140,8 +11140,6 @@ package body Exp_Ch3 is
             --  is a wrapper's body in order to get check suppression right.
 
             Set_Corresponding_Spec (Func_Body, Func_Id);
-
-            Override_Dispatching_Operation (Tag_Typ, Subp, New_Op => Func_Id);
          end if;
 
       <<Next_Prim>>
-- 
2.40.0