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Diffstat (limited to 'gcc-4.8.3/gcc/ada/back_end.ads')
-rw-r--r-- | gcc-4.8.3/gcc/ada/back_end.ads | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/back_end.ads b/gcc-4.8.3/gcc/ada/back_end.ads new file mode 100644 index 000000000..9d92ce39c --- /dev/null +++ b/gcc-4.8.3/gcc/ada/back_end.ads @@ -0,0 +1,97 @@ +------------------------------------------------------------------------------ +-- -- +-- 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; |