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Diffstat (limited to 'gcc-4.9/gcc/ada/back_end.ads')
-rw-r--r-- | gcc-4.9/gcc/ada/back_end.ads | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/ada/back_end.ads b/gcc-4.9/gcc/ada/back_end.ads new file mode 100644 index 000000000..9e28a6ed6 --- /dev/null +++ b/gcc-4.9/gcc/ada/back_end.ads @@ -0,0 +1,85 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- B A C K _ E N D -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2013, 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 + +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); + + 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. + -- + -- This routine is expected to set the following to True if necessary (the + -- default for all of these in Opt is False). + -- + -- Opt.Suppress_All_Inlining + -- Opt.Suppress_Control_Float_Optimizations + -- Opt.Generate_SCO + -- Opt.Generate_SCO_Instance_Table + -- Opt.Stack_Checking_Enabled + -- Opt.No_Stdinc + -- Opt.No_Stdlib + + 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; |