98 lines
5.1 KiB
Ada
98 lines
5.1 KiB
Ada
------------------------------------------------------------------------------
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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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Precision : Positive; -- Precision of representation in bits
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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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