-- LLVM back-end for ortho - Main subprogram.
-- Copyright (C) 2014 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT 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
-- along with GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Ada.Command_Line; use Ada.Command_Line;
with Ada.Unchecked_Deallocation;
with Ada.Unchecked_Conversion;
with Ada.Text_IO; use Ada.Text_IO;
with Ortho_Front; use Ortho_Front;
with LLVM.BitWriter;
with LLVM.Core; use LLVM.Core;
with LLVM.Target; use LLVM.Target;
with LLVM.TargetMachine; use LLVM.TargetMachine;
with LLVM.Analysis;
with LLVM.Transforms.Scalar;
with Ortho_LLVM; use Ortho_LLVM;
with Interfaces;
with Interfaces.C; use Interfaces.C;
procedure Ortho_Code_Main39 is
-- Name of the output filename (given by option '-o').
Output : String_Acc := null;
type Output_Kind_Type is (Output_Llvm, Output_Bytecode,
Output_Assembly, Output_Object);
Output_Kind : Output_Kind_Type := Output_Llvm;
-- True if the LLVM output must be displayed (set by '--dump-llvm')
Flag_Dump_Llvm : Boolean := False;
-- Index of the first file argument.
First_File : Natural;
-- Current option index.
Optind : Natural;
-- Number of arguments.
Argc : constant Natural := Argument_Count;
-- Name of the module.
Module_Name : String := "ortho" & Ascii.Nul;
-- Target triple.
Triple : Cstring := Empty_Cstring;
Target : aliased TargetRef;
CPU : constant Cstring := Empty_Cstring;
Features : constant Cstring := Empty_Cstring;
Reloc : RelocMode := RelocDefault;
function To_String (C : Cstring) return String is
function Strlen (C : Cstring) return Natural;
pragma Import (C, Strlen);
subtype Fat_String is String (Positive);
type Fat_String_Acc is access Fat_String;
function To_Fat_String_Acc is new
Ada.Unchecked_Conversion (Cstring, Fat_String_Acc);
begin
return To_Fat_String_Acc (C)(1 .. Strlen (C));
end To_String;
Codegen : CodeGenFileType := ObjectFile;
Msg : aliased Cstring;
begin
Ortho_Front.Init;
-- Decode options.
First_File := Natural'Last;
Optind := 1;
while Optind <= Argc loop
declare
Arg : constant String := Argument (Optind);
begin
if Arg (1) = '-' then
if Arg = "--dump-llvm" then
Flag_Dump_Llvm := True;
elsif Arg = "-o" then
if Optind = Argc then
Put_Line (Standard_Error, "error: missing filename to '-o'");
return;
end if;
Output := new String'(Argument (Optind + 1) & ASCII.Nul);
Optind := Optind + 1;
elsif Arg = "-quiet" then
-- Skip silently.
null;
elsif Arg = "-S" then
Output_Kind := Output_Assembly;
Codegen := AssemblyFile;
elsif Arg = "-c" then
Output_Kind := Output_Object;
Codegen := ObjectFile;
elsif Arg = "-O0" then
Optimization := CodeGenLevelNone;
elsif Arg = "-O1" or else Arg = "-O" then
Optimization := CodeGenLevelLess;
elsif Arg = "-O2" then
Optimization := CodeGenLevelDefault;
elsif Arg = "-O3" then
Optimization := CodeGenLevelAggressive;
elsif Arg = "-fpic" or Arg = "-fPIC" then
Reloc := RelocPIC;
elsif Arg = "-fno-pic" then
Reloc := RelocStatic;
elsif Arg = "--emit-llvm" then
Output_Kind := Output_Llvm;
elsif Arg = "--emit-bc" then
Output_Kind := Output_Bytecode;
elsif Arg = "-glines"
or else Arg = "-gline-tables-only"
then
null;
elsif Arg = "-g" then
null;
else
-- This is really an argument.
declare
procedure Unchecked_Deallocation is
new Ada.Unchecked_Deallocation
(Name => String_Acc, Object => String);
Opt : String_Acc := new String'(Arg);
Opt_Arg : String_Acc;
Res : Natural;
begin
Opt_Arg := null;
if Optind < Argument_Count then
declare
Arg1 : constant String := Argument (Optind + 1);
begin
if Arg1 (Arg1'First) /= '-' then
Opt_Arg := new String'(Arg1);
end if;
end;
end if;
Res := Ortho_Front.Decode_Option (Opt, Opt_Arg);
case Res is
when 0 =>
Put_Line (Standard_Error,
"unknown option '" & Arg & "'");
return;
when 1 =>
null;
when 2 =>
Optind := Optind + 1;
when others =>
raise Program_Error;
end case;
Unchecked_Deallocation (Opt);
Unchecked_Deallocation (Opt_Arg);
end;
end if;
else
First_File := Optind;
exit;
end if;
end;
Optind := Optind + 1;
end loop;
-- Link with LLVM libraries.
InitializeNativeTarget;
InitializeNativeAsmPrinter;
-- LinkInJIT;
Module := ModuleCreateWithName (Module_Name'Address);
-- Extract target triple
Triple := GetDefaultTargetTriple;
SetTarget (Module, Triple);
-- Get Target
if GetTargetFromTriple (Triple, Target'Access, Msg'Access) /= 0 then
raise Program_Error;
end if;
-- Create a target machine
Target_Machine := CreateTargetMachine
(Target, Triple, CPU, Features, Optimization, Reloc, CodeModelDefault);
Target_Data := CreateTargetDataLayout (Target_Machine);
SetModuleDataLayout (Module, Target_Data);
Ortho_LLVM.Init;
Set_Exit_Status (Failure);
if First_File > Argument_Count then
begin
if not Parse (null) then
return;
end if;
exception
when others =>
return;
end;
else
for I in First_File .. Argument_Count loop
declare
Filename : constant String_Acc :=
new String'(Argument (First_File));
begin
if not Parse (Filename) then
return;
end if;
exception
when others =>
return;
end;
end loop;
end if;
if Flag_Dump_Llvm then
DumpModule (Module);
end if;
-- Verify module.
if False then
if LLVM.Analysis.VerifyModule
(Module, LLVM.Analysis.PrintMessageAction, Msg'Access) /= 0
then
DisposeMessage (Msg);
raise Program_Error;
end if;
end if;
if Optimization > CodeGenLevelNone then
declare
use LLVM.Transforms.Scalar;
Global_Manager : constant Boolean := False;
Pass_Manager : PassManagerRef;
Res : Bool;
pragma Unreferenced (Res);
A_Func : ValueRef;
begin
if Global_Manager then
Pass_Manager := CreatePassManager;
else
Pass_Manager := CreateFunctionPassManagerForModule (Module);
end if;
AddPromoteMemoryToRegisterPass (Pass_Manager);
AddCFGSimplificationPass (Pass_Manager);
if Global_Manager then
Res := RunPassManager (Pass_Manager, Module);
else
A_Func := GetFirstFunction (Module);
while A_Func /= Null_ValueRef loop
Res := RunFunctionPassManager (Pass_Manager, A_Func);
A_Func := GetNextFunction (A_Func);
end loop;
end if;
end;
end if;
if Output /= null then
declare
Error : Boolean;
begin
Msg := Empty_Cstring;
case Output_Kind is
when Output_Assembly
| Output_Object =>
Error := LLVM.TargetMachine.TargetMachineEmitToFile
(Target_Machine, Module,
Output.all'Address, Codegen, Msg'Access) /= 0;
when Output_Bytecode =>
Error := LLVM.BitWriter.WriteBitcodeToFile
(Module, Output.all'Address) /= 0;
when Output_Llvm =>
Error := PrintModuleToFile
(Module, Output.all'Address, Msg'Access) /= 0;
end case;
if Error then
Put_Line (Standard_Error,
"error while writing to " & Output.all);
if Msg /= Empty_Cstring then
Put_Line (Standard_Error,
"message: " & To_String (Msg));
DisposeMessage (Msg);
end if;
Set_Exit_Status (2);
return;
end if;
end;
else
DumpModule (Module);
end if;
Set_Exit_Status (Success);
exception
when others =>
Set_Exit_Status (2);
raise;
end Ortho_Code_Main39;
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