[COMMITTED] ada: Fix recent assertion failure on GPR2

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

From: Eric Botcazou <ebotcazou@adacore.com>

It's the compiler trying to load the nonexistent body of a generic package
when trying to inline a call to an expression function of this package that
has a pre or post-condition (hence the need for -gnata to trigger the ICE).

gcc/ada/

	* contracts.adb (Build_Subprogram_Contract_Wrapper): Do not fiddle
	with the Was_Expression_Function flag. Move a few lines around.

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

---
 gcc/ada/contracts.adb | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/gcc/ada/contracts.adb b/gcc/ada/contracts.adb
index fef3d24870f..6f474eb2944 100644
--- a/gcc/ada/contracts.adb
+++ b/gcc/ada/contracts.adb
@@ -1691,6 +1691,10 @@ package body Contracts is
       Set_Debug_Info_Needed  (Wrapper_Id);
       Set_Wrapped_Statements (Subp_Id, Wrapper_Id);
 
+      Set_Has_Pragma_Inline (Wrapper_Id, Has_Pragma_Inline (Subp_Id));
+      Set_Has_Pragma_Inline_Always
+        (Wrapper_Id, Has_Pragma_Inline_Always (Subp_Id));
+
       --  Create specification and declaration for the wrapper
 
       if No (Ret_Type) or else Ret_Type = Standard_Void_Type then
@@ -1719,20 +1723,6 @@ package body Contracts is
         Make_Handled_Sequence_Of_Statements (Loc,
           End_Label  => Make_Identifier (Loc, Chars (Wrapper_Id))));
 
-      --  Move certain flags which are relevant to the body
-
-      --  Wouldn't a better way be to perform some sort of copy of Body_Decl
-      --  for Wrapper_Body be less error-prone ???
-
-      if Was_Expression_Function (Body_Decl) then
-         Set_Was_Expression_Function (Body_Decl, False);
-         Set_Was_Expression_Function (Wrapper_Body);
-      end if;
-
-      Set_Has_Pragma_Inline (Wrapper_Id, Has_Pragma_Inline (Subp_Id));
-      Set_Has_Pragma_Inline_Always
-        (Wrapper_Id, Has_Pragma_Inline_Always (Subp_Id));
-
       --  Prepend a call to the wrapper when the subprogram is a procedure
 
       if No (Ret_Type) or else Ret_Type = Standard_Void_Type then
-- 
2.34.1