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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- B A C K _ E N D --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2011, 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. --
-- --
------------------------------------------------------------------------------
-- Call the back end with all the information needed. Also contains other
-- back-end specific interfaces required by the front end.
with Einfo; use Einfo;
package Back_End is
type Back_End_Mode_Type is (
Generate_Object,
-- Full back end operation with object file generation
Declarations_Only,
-- Partial back end operation with no object file generation. In this
-- mode the only useful action performed by gigi is to process all
-- declarations issuing any error messages (in particular those to
-- do with rep clauses), and to back annotate representation info.
Skip);
-- Back end call is skipped (syntax only, or errors found)
pragma Convention (C, Back_End_Mode_Type);
for Back_End_Mode_Type use (0, 1, 2);
type C_String is array (0 .. 255) of aliased Character;
pragma Convention (C, C_String);
type Register_Type_Proc is access procedure
(C_Name : C_String; -- Nul-terminated string with name of type
Digs : Natural; -- Nr or digits for floating point, 0 otherwise
Complex : Boolean; -- True iff type has real and imaginary parts
Count : Natural; -- Number of elements in vector, 0 otherwise
Float_Rep : Float_Rep_Kind; -- Representation used for fpt type
Precision : Positive; -- Precision of representation in bits
Size : Positive; -- Size of representation in bits
Alignment : Natural); -- Required alignment in bits
pragma Convention (C, Register_Type_Proc);
-- Call back procedure for Register_Back_End_Types. This is to be used by
-- Create_Standard to create predefined types for all types supported by
-- the back end.
procedure Register_Back_End_Types (Call_Back : Register_Type_Proc);
-- Calls the Call_Back function with information for each supported type.
procedure Call_Back_End (Mode : Back_End_Mode_Type);
-- Call back end, i.e. make call to driver traversing the tree and
-- outputting code. This call is made with all tables locked.
-- The back end is responsible for unlocking any tables it may need
-- to change, and locking them again before returning.
procedure Scan_Compiler_Arguments;
-- Acquires command-line parameters passed to the compiler and processes
-- them. Calls Scan_Front_End_Switches for any front-end switches found.
--
-- The processing of arguments is private to the back end, since the way
-- of acquiring the arguments as well as the set of allowable back end
-- switches is different depending on the particular back end being used.
--
-- Any processed switches that influence the result of a compilation must
-- be added to the Compilation_Arguments table.
procedure Gen_Or_Update_Object_File;
-- Is used to generate the object file (if generated directly by gnat1), or
-- update it if it has already been generated by the call to Call_Back_End,
-- so that its timestamp is updated by the call.
--
-- This is a no-op with the gcc back-end (the object file is generated by
-- the assembler afterwards), but is needed for back-ends that directly
-- generate the final object file (such as the .NET backend) so that the
-- object file's timestamp is correct when compared with the corresponding
-- ali file by gnatmake.
end Back_End;
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