[COMMITTED] ada: Flag renaming-as-spec as a body to inline

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

From: Piotr Trojanek <trojanek@adacore.com>

For GNAT the frontend is only inlining subprograms with explicit specs,
including specs completed with renaming-as-body. For GNATprove the
frontend must also inline renamings acting as specs. Otherwise, we will
try to build a body-to-inline with code that is can't handle unusual
subprogram renamings, e.g. those of the form "object.call".

gcc/ada/

	* freeze.adb (Build_Renamed_Body): Rewrite subprogram renaming to
	subprogram declaration early and then set the Body_To_Inling flag.

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

---
 gcc/ada/freeze.adb | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/gcc/ada/freeze.adb b/gcc/ada/freeze.adb
index a3ab685f5fc..0e55f146e28 100644
--- a/gcc/ada/freeze.adb
+++ b/gcc/ada/freeze.adb
@@ -473,6 +473,12 @@ package body Freeze is
          Set_Is_Overloaded (Call_Name, False);
       end if;
 
+      if Nkind (Decl) /= N_Subprogram_Declaration then
+         Rewrite (N,
+           Make_Subprogram_Declaration (Loc,
+             Specification => Specification (N)));
+      end if;
+
       --  For simple renamings, subsequent calls can be expanded directly as
       --  calls to the renamed entity. The body must be generated in any case
       --  for calls that may appear elsewhere. This is not done in the case
@@ -480,7 +486,6 @@ package body Freeze is
       --  body has not been built yet.
 
       if Ekind (Old_S) in E_Function | E_Procedure
-        and then Nkind (Decl) = N_Subprogram_Declaration
         and then not Is_Generic_Instance (Old_S)
       then
          Set_Body_To_Inline (Decl, Old_S);
@@ -655,12 +660,6 @@ package body Freeze is
                  Statements => New_List (Call_Node)));
       end if;
 
-      if Nkind (Decl) /= N_Subprogram_Declaration then
-         Rewrite (N,
-           Make_Subprogram_Declaration (Loc,
-             Specification => Specification (N)));
-      end if;
-
       --  Link the body to the entity whose declaration it completes. If
       --  the body is analyzed when the renamed entity is frozen, it may
       --  be necessary to restore the proper scope (see package Exp_Ch13).
-- 
2.34.1