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Diffstat (limited to 'gcc-4.9/gcc/ada/exp_code.ads')
| -rw-r--r-- | gcc-4.9/gcc/ada/exp_code.ads | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/ada/exp_code.ads b/gcc-4.9/gcc/ada/exp_code.ads new file mode 100644 index 000000000..a9e701a5a --- /dev/null +++ b/gcc-4.9/gcc/ada/exp_code.ads @@ -0,0 +1,127 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- E X P _ C O D E -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1996-2007, 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. -- +-- -- +------------------------------------------------------------------------------ + +-- Processing for handling code statements + +with Types; use Types; + +with System; use System; +package Exp_Code is + + procedure Expand_Asm_Call (N : Node_Id); + -- Expands a call to Asm into an equivalent N_Code_Statement node + + -- The following routines provide an abstract interface to analyze + -- code statements, for use by Gigi processing for code statements. + -- Note that the implementations of these routines must not attempt + -- to expand tables that are frozen on entry to Gigi. + + function Is_Asm_Volatile (N : Node_Id) return Boolean; + -- Given an N_Code_Statement node N, return True if Volatile=True is + -- specified, and False if Volatile=False is specified (or set by default). + + function Asm_Template (N : Node_Id) return Node_Id; + -- Given an N_Code_Statement node N, returns string literal node for + -- template in call + + procedure Clobber_Setup (N : Node_Id); + -- Given an N_Code_Statement node N, setup to process the clobber list + -- with subsequent calls to Clobber_Get_Next. + + function Clobber_Get_Next return System.Address; + -- Can only be called after a previous call to Clobber_Setup. The + -- returned value is a pointer to a null terminated (C format) string + -- for the next register argument. Null_Address is returned when there + -- are no more arguments. + + procedure Setup_Asm_Inputs (N : Node_Id); + -- Given an N_Code_Statement node N, setup to read list of Asm_Input + -- arguments. The protocol is to construct a loop as follows: + -- + -- Setup_Asm_Inputs (N); + -- while Present (Asm_Input_Value) + -- body + -- Next_Asm_Input; + -- end loop; + -- + -- where the loop body calls Asm_Input_Constraint or Asm_Input_Value to + -- obtain the constraint string or input value expression from the current + -- Asm_Input argument. + + function Asm_Input_Constraint return Node_Id; + -- Called within a loop initialized by Setup_Asm_Inputs and controlled + -- by Next_Asm_Input as described above. Returns a string literal node + -- for the constraint component of the current Asm_Input_Parameter, or + -- Empty if there are no more Asm_Input parameters. + + function Asm_Input_Value return Node_Id; + -- Called within a loop initialized by Setup_Asm_Inputs and controlled + -- by Next_Asm_Input as described above. Returns the expression node for + -- the value component of the current Asm_Input parameter, or Empty if + -- there are no more Asm_Input parameters, or Error if an error was + -- previously detected in the input parameters (note that the backend + -- need not worry about this case, since it won't be called if there + -- were any such serious errors detected). + + procedure Next_Asm_Input; + -- Step to next Asm_Input parameter. It is an error to call this procedure + -- if there are no more available parameters (which is impossible if the + -- call appears in a loop as in the above example). + + procedure Setup_Asm_Outputs (N : Node_Id); + -- Given an N_Code_Statement node N, setup to read list of Asm_Output + -- arguments. The protocol is to construct a loop as follows: + -- + -- Setup_Asm_Outputs (N); + -- while Present (Asm_Output_Variable) + -- body + -- Next_Asm_Output; + -- end loop; + -- + -- where the loop body calls Asm_Output_Constraint or Asm_Output_Variable + -- to obtain the constraint string or output variable name from the current + -- Asm_Output argument. + + function Asm_Output_Constraint return Node_Id; + -- Called within a loop initialized by Setup_Asm_Outputs and controlled + -- by Next_Asm_Output as described above. Returns a string literal node + -- for the constraint component of the current Asm_Output_Parameter, or + -- Empty if there are no more Asm_Output parameters. + + function Asm_Output_Variable return Node_Id; + -- Called within a loop initialized by Setup_Asm_Outputs and controlled by + -- Next_Asm_Output as described above. Returns the expression node for the + -- output variable component of the current Asm_Output parameter, or Empty + -- if there are no more Asm_Output parameters, or Error if an error was + -- previously detected in the input parameters (note that the backend need + -- not worry about this case, since it won't be called if there were any + -- such serious errors detected). + + procedure Next_Asm_Output; + -- Step to next Asm_Output parameter. It is an error to call this procedure + -- if there are no more available parameters (which is impossible if the + -- call appears in a loop as in the above example). + +end Exp_Code; |