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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [back_end.ads] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                             B A C K _ E N D                              --
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--                                                                          --
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--                                 S p e c                                  --
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--                                                                          --
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--          Copyright (C) 1992-2011, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
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-- for  more details.  You should have  received  a copy of the GNU General --
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-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license.          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  Call the back end with all the information needed. Also contains other
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--  back-end specific interfaces required by the front end.
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with Einfo; use Einfo;
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package Back_End is
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   type Back_End_Mode_Type is (
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      Generate_Object,
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      --  Full back end operation with object file generation
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      Declarations_Only,
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      --  Partial back end operation with no object file generation. In this
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      --  mode the only useful action performed by gigi is to process all
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      --  declarations issuing any error messages (in particular those to
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      --  do with rep clauses), and to back annotate representation info.
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      Skip);
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      --  Back end call is skipped (syntax only, or errors found)
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   pragma Convention (C, Back_End_Mode_Type);
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   for Back_End_Mode_Type use (0, 1, 2);
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   type C_String is array (0 .. 255) of aliased Character;
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   pragma Convention (C, C_String);
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   type Register_Type_Proc is access procedure
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     (C_Name    : C_String; -- Nul-terminated string with name of type
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      Digs      : Natural;  -- Nr or digits for floating point, 0 otherwise
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      Complex   : Boolean;  -- True iff type has real and imaginary parts
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      Count     : Natural;  -- Number of elements in vector, 0 otherwise
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      Float_Rep : Float_Rep_Kind; -- Representation used for fpt type
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      Size      : Positive; -- Size of representation in bits
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      Alignment : Natural); -- Required alignment in bits
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   pragma Convention (C, Register_Type_Proc);
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   --  Call back procedure for Register_Back_End_Types. This is to be used by
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   --  Create_Standard to create predefined types for all types supported by
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   --  the back end.
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   procedure Register_Back_End_Types (Call_Back : Register_Type_Proc);
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   --  Calls the Call_Back function with information for each supported type.
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   procedure Call_Back_End (Mode : Back_End_Mode_Type);
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   --  Call back end, i.e. make call to driver traversing the tree and
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   --  outputting code. This call is made with all tables locked.
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   --  The back end is responsible for unlocking any tables it may need
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   --  to change, and locking them again before returning.
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   procedure Scan_Compiler_Arguments;
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   --  Acquires command-line parameters passed to the compiler and processes
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   --  them. Calls Scan_Front_End_Switches for any front-end switches found.
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   --
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   --  The processing of arguments is private to the back end, since the way
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   --  of acquiring the arguments as well as the set of allowable back end
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   --  switches is different depending on the particular back end being used.
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   --
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   --  Any processed switches that influence the result of a compilation must
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   --  be added to the Compilation_Arguments table.
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   procedure Gen_Or_Update_Object_File;
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   --  Is used to generate the object file (if generated directly by gnat1), or
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   --  update it if it has already been generated by the call to Call_Back_End,
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   --  so that its timestamp is updated by the call.
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   --
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   --  This is a no-op with the gcc back-end (the object file is generated by
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   --  the assembler afterwards), but is needed for back-ends that directly
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   --  generate the final object file (such as the .NET backend) so that the
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   --  object file's timestamp is correct when compared with the corresponding
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   --  ali file by gnatmake.
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end Back_End;

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