Subversion Repositories openrisc_2011-10-31

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--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                             E X P _ C H 1 1                              --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1992-2009, 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.                                     --

--                                                                          --

-- You should have received a copy of the GNU General Public License along  --

-- with this program; see file COPYING3.  If not see                        --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

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--  Expand routines for chapter 11 constructs

with Types; use Types;

package Exp_Ch11 is

   procedure Expand_N_Exception_Declaration          (N : Node_Id);

   procedure Expand_N_Handled_Sequence_Of_Statements (N : Node_Id);

   procedure Expand_N_Raise_Constraint_Error         (N : Node_Id);

   procedure Expand_N_Raise_Program_Error            (N : Node_Id);

   procedure Expand_N_Raise_Statement                (N : Node_Id);

   procedure Expand_N_Raise_Storage_Error            (N : Node_Id);

   procedure Expand_N_Subprogram_Info                (N : Node_Id);

   --  Data structures for gathering information to build exception tables

   --  See runtime routine Ada.Exceptions for full details on the format and

   --  content of these tables.

   procedure Expand_At_End_Handler (HSS : Node_Id; Block : Node_Id);

   --  Given a handled statement sequence, HSS, for which the At_End_Proc

   --  field is set, and which currently has no exception handlers, this

   --  procedure expands the special exception handler required.

   --  This procedure also create a new scope for the given Block, if

   --  Block is not Empty.

   procedure Expand_Exception_Handlers (HSS : Node_Id);

   --  This procedure expands exception handlers, and is called as part

   --  of the processing for Expand_N_Handled_Sequence_Of_Statements and

   --  is also called from Expand_At_End_Handler. N is the handled sequence

   --  of statements that has the exception handler(s) to be expanded. This

   --  is also called to expand the special exception handler built for

   --  accept bodies (see Exp_Ch9.Build_Accept_Body).

   function Find_Local_Handler

     (Ename : Entity_Id;

      Nod   : Node_Id) return Node_Id;

   --  This function searches for a local exception handler that will handle

   --  the exception named by Ename. If such a local hander exists, then the

   --  corresponding N_Exception_Handler is returned. If no such handler is

   --  found then Empty is returned. In order to match and return True, the

   --  handler may not have a choice parameter specification. Nod is the raise

   --  node that references the handler.

   function Get_Local_Raise_Call_Entity return Entity_Id;

   --  This function is provided for use by the back end in conjunction with

   --  generation of Local_Raise calls when an exception raise is converted to

   --  a goto statement. If Local_Raise is defined, its entity is returned,

   --  if not, Empty is returned (in which case the call is silently skipped).

   function Get_RT_Exception_Entity (R : RT_Exception_Code) return Entity_Id;

   --  This function is provided for use by the back end in conjunction with

   --  generation of Local_Raise calls when an exception raise is converted to

   --  a goto statement. The argument is the reason code which would be used

   --  to determine which Rcheck_nn procedure to call. The returned result is

   --  the exception entity to be passed to Local_Raise.

   function Is_Non_Ada_Error (E : Entity_Id) return Boolean;

   --  This function is provided for Gigi use. It returns True if operating on

   --  VMS, and the argument E is the entity for System.Aux_Dec.Non_Ada_Error.

   --  This is used to generate the special matching code for this exception.

   procedure Possible_Local_Raise (N : Node_Id; E : Entity_Id);

   --  This procedure is called whenever node N might cause the back end

   --  to generate a local raise for a local Constraint/Program/Storage_Error

   --  exception. It deals with generating a warning if there is no local

   --  handler (and restriction No_Exception_Propagation is set), or if there

   --  is a local handler marking that it has a local raise. E is the entity

   --  of the corresponding exception.

end Exp_Ch11;