--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/exp_code.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,127 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             E X P _ C O D E                              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1996-2007, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license.          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Processing for handling code statements
+
+with Types; use Types;
+
+with System; use System;
+package Exp_Code is
+
+   procedure Expand_Asm_Call (N : Node_Id);
+   --  Expands a call to Asm into an equivalent N_Code_Statement node
+
+   --  The following routines provide an abstract interface to analyze
+   --  code statements, for use by Gigi processing for code statements.
+   --  Note that the implementations of these routines must not attempt
+   --  to expand tables that are frozen on entry to Gigi.
+
+   function Is_Asm_Volatile (N : Node_Id) return Boolean;
+   --  Given an N_Code_Statement node N, return True if Volatile=True is
+   --  specified, and False if Volatile=False is specified (or set by default).
+
+   function Asm_Template (N : Node_Id) return Node_Id;
+   --  Given an N_Code_Statement node N, returns string literal node for
+   --  template in call
+
+   procedure Clobber_Setup (N : Node_Id);
+   --  Given an N_Code_Statement node N, setup to process the clobber list
+   --  with subsequent calls to Clobber_Get_Next.
+
+   function Clobber_Get_Next return System.Address;
+   --  Can only be called after a previous call to Clobber_Setup. The
+   --  returned value is a pointer to a null terminated (C format) string
+   --  for the next register argument. Null_Address is returned when there
+   --  are no more arguments.
+
+   procedure Setup_Asm_Inputs (N : Node_Id);
+   --  Given an N_Code_Statement node N, setup to read list of Asm_Input
+   --  arguments. The protocol is to construct a loop as follows:
+   --
+   --    Setup_Asm_Inputs (N);
+   --    while Present (Asm_Input_Value)
+   --      body
+   --      Next_Asm_Input;
+   --    end loop;
+   --
+   --  where the loop body calls Asm_Input_Constraint or Asm_Input_Value to
+   --  obtain the constraint string or input value expression from the current
+   --  Asm_Input argument.
+
+   function Asm_Input_Constraint return Node_Id;
+   --  Called within a loop initialized by Setup_Asm_Inputs and controlled
+   --  by Next_Asm_Input as described above. Returns a string literal node
+   --  for the constraint component of the current Asm_Input_Parameter, or
+   --  Empty if there are no more Asm_Input parameters.
+
+   function Asm_Input_Value return Node_Id;
+   --  Called within a loop initialized by Setup_Asm_Inputs and controlled
+   --  by Next_Asm_Input as described above. Returns the expression node for
+   --  the value component of the current Asm_Input parameter, or Empty if
+   --  there are no more Asm_Input parameters, or Error if an error was
+   --  previously detected in the input parameters (note that the backend
+   --  need not worry about this case, since it won't be called if there
+   --  were any such serious errors detected).
+
+   procedure Next_Asm_Input;
+   --  Step to next Asm_Input parameter. It is an error to call this procedure
+   --  if there are no more available parameters (which is impossible if the
+   --  call appears in a loop as in the above example).
+
+   procedure Setup_Asm_Outputs (N : Node_Id);
+   --  Given an N_Code_Statement node N, setup to read list of Asm_Output
+   --  arguments. The protocol is to construct a loop as follows:
+   --
+   --    Setup_Asm_Outputs (N);
+   --    while Present (Asm_Output_Variable)
+   --      body
+   --      Next_Asm_Output;
+   --    end loop;
+   --
+   --  where the loop body calls Asm_Output_Constraint or Asm_Output_Variable
+   --  to obtain the constraint string or output variable name from the current
+   --  Asm_Output argument.
+
+   function Asm_Output_Constraint return Node_Id;
+   --  Called within a loop initialized by Setup_Asm_Outputs and controlled
+   --  by Next_Asm_Output as described above. Returns a string literal node
+   --  for the constraint component of the current Asm_Output_Parameter, or
+   --  Empty if there are no more Asm_Output parameters.
+
+   function Asm_Output_Variable return Node_Id;
+   --  Called within a loop initialized by Setup_Asm_Outputs and controlled by
+   --  Next_Asm_Output as described above. Returns the expression node for the
+   --  output variable component of the current Asm_Output parameter, or Empty
+   --  if there are no more Asm_Output parameters, or Error if an error was
+   --  previously detected in the input parameters (note that the backend need
+   --  not worry about this case, since it won't be called if there were any
+   --  such serious errors detected).
+
+   procedure Next_Asm_Output;
+   --  Step to next Asm_Output parameter. It is an error to call this procedure
+   --  if there are no more available parameters (which is impossible if the
+   --  call appears in a loop as in the above example).
+
+end Exp_Code;