mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-05 13:09:10 +00:00
9bc23ad614
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120747 91177308-0d34-0410-b5e6-96231b3b80d8
349 lines
11 KiB
C++
349 lines
11 KiB
C++
//===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This is the llc code generator driver. It provides a convenient
|
|
// command-line interface for generating native assembly-language code
|
|
// or C code, given LLVM bitcode.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/LLVMContext.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/PassManager.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/Support/IRReader.h"
|
|
#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
|
|
#include "llvm/CodeGen/LinkAllCodegenComponents.h"
|
|
#include "llvm/Config/config.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/PluginLoader.h"
|
|
#include "llvm/Support/PrettyStackTrace.h"
|
|
#include "llvm/Support/ToolOutputFile.h"
|
|
#include "llvm/Support/Host.h"
|
|
#include "llvm/Support/Signals.h"
|
|
#include "llvm/Target/SubtargetFeature.h"
|
|
#include "llvm/Target/TargetData.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetRegistry.h"
|
|
#include "llvm/Target/TargetSelect.h"
|
|
#include <memory>
|
|
using namespace llvm;
|
|
|
|
// General options for llc. Other pass-specific options are specified
|
|
// within the corresponding llc passes, and target-specific options
|
|
// and back-end code generation options are specified with the target machine.
|
|
//
|
|
static cl::opt<std::string>
|
|
InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
|
|
|
|
static cl::opt<std::string>
|
|
OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"));
|
|
|
|
// Determine optimization level.
|
|
static cl::opt<char>
|
|
OptLevel("O",
|
|
cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
|
|
"(default = '-O2')"),
|
|
cl::Prefix,
|
|
cl::ZeroOrMore,
|
|
cl::init(' '));
|
|
|
|
static cl::opt<std::string>
|
|
TargetTriple("mtriple", cl::desc("Override target triple for module"));
|
|
|
|
static cl::opt<std::string>
|
|
MArch("march", cl::desc("Architecture to generate code for (see --version)"));
|
|
|
|
static cl::opt<std::string>
|
|
MCPU("mcpu",
|
|
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
|
|
cl::value_desc("cpu-name"),
|
|
cl::init(""));
|
|
|
|
static cl::list<std::string>
|
|
MAttrs("mattr",
|
|
cl::CommaSeparated,
|
|
cl::desc("Target specific attributes (-mattr=help for details)"),
|
|
cl::value_desc("a1,+a2,-a3,..."));
|
|
|
|
static cl::opt<bool>
|
|
RelaxAll("mc-relax-all",
|
|
cl::desc("When used with filetype=obj, "
|
|
"relax all fixups in the emitted object file"));
|
|
|
|
cl::opt<TargetMachine::CodeGenFileType>
|
|
FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
|
|
cl::desc("Choose a file type (not all types are supported by all targets):"),
|
|
cl::values(
|
|
clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
|
|
"Emit an assembly ('.s') file"),
|
|
clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
|
|
"Emit a native object ('.o') file [experimental]"),
|
|
clEnumValN(TargetMachine::CGFT_Null, "null",
|
|
"Emit nothing, for performance testing"),
|
|
clEnumValEnd));
|
|
|
|
cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
|
|
cl::desc("Do not verify input module"));
|
|
|
|
cl::opt<bool> DisableDotLoc("disable-dot-loc", cl::Hidden,
|
|
cl::desc("Do not use .loc entries"));
|
|
|
|
static cl::opt<bool>
|
|
DisableRedZone("disable-red-zone",
|
|
cl::desc("Do not emit code that uses the red zone."),
|
|
cl::init(false));
|
|
|
|
static cl::opt<bool>
|
|
NoImplicitFloats("no-implicit-float",
|
|
cl::desc("Don't generate implicit floating point instructions (x86-only)"),
|
|
cl::init(false));
|
|
|
|
// GetFileNameRoot - Helper function to get the basename of a filename.
|
|
static inline std::string
|
|
GetFileNameRoot(const std::string &InputFilename) {
|
|
std::string IFN = InputFilename;
|
|
std::string outputFilename;
|
|
int Len = IFN.length();
|
|
if ((Len > 2) &&
|
|
IFN[Len-3] == '.' &&
|
|
((IFN[Len-2] == 'b' && IFN[Len-1] == 'c') ||
|
|
(IFN[Len-2] == 'l' && IFN[Len-1] == 'l'))) {
|
|
outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
|
|
} else {
|
|
outputFilename = IFN;
|
|
}
|
|
return outputFilename;
|
|
}
|
|
|
|
static tool_output_file *GetOutputStream(const char *TargetName,
|
|
Triple::OSType OS,
|
|
const char *ProgName) {
|
|
// If we don't yet have an output filename, make one.
|
|
if (OutputFilename.empty()) {
|
|
if (InputFilename == "-")
|
|
OutputFilename = "-";
|
|
else {
|
|
OutputFilename = GetFileNameRoot(InputFilename);
|
|
|
|
switch (FileType) {
|
|
default: assert(0 && "Unknown file type");
|
|
case TargetMachine::CGFT_AssemblyFile:
|
|
if (TargetName[0] == 'c') {
|
|
if (TargetName[1] == 0)
|
|
OutputFilename += ".cbe.c";
|
|
else if (TargetName[1] == 'p' && TargetName[2] == 'p')
|
|
OutputFilename += ".cpp";
|
|
else
|
|
OutputFilename += ".s";
|
|
} else
|
|
OutputFilename += ".s";
|
|
break;
|
|
case TargetMachine::CGFT_ObjectFile:
|
|
if (OS == Triple::Win32)
|
|
OutputFilename += ".obj";
|
|
else
|
|
OutputFilename += ".o";
|
|
break;
|
|
case TargetMachine::CGFT_Null:
|
|
OutputFilename += ".null";
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Decide if we need "binary" output.
|
|
bool Binary = false;
|
|
switch (FileType) {
|
|
default: assert(0 && "Unknown file type");
|
|
case TargetMachine::CGFT_AssemblyFile:
|
|
break;
|
|
case TargetMachine::CGFT_ObjectFile:
|
|
case TargetMachine::CGFT_Null:
|
|
Binary = true;
|
|
break;
|
|
}
|
|
|
|
// Open the file.
|
|
std::string error;
|
|
unsigned OpenFlags = 0;
|
|
if (Binary) OpenFlags |= raw_fd_ostream::F_Binary;
|
|
tool_output_file *FDOut = new tool_output_file(OutputFilename.c_str(), error,
|
|
OpenFlags);
|
|
if (!error.empty()) {
|
|
errs() << error << '\n';
|
|
delete FDOut;
|
|
return 0;
|
|
}
|
|
|
|
return FDOut;
|
|
}
|
|
|
|
// main - Entry point for the llc compiler.
|
|
//
|
|
int main(int argc, char **argv) {
|
|
sys::PrintStackTraceOnErrorSignal();
|
|
PrettyStackTraceProgram X(argc, argv);
|
|
|
|
// Enable debug stream buffering.
|
|
EnableDebugBuffering = true;
|
|
|
|
LLVMContext &Context = getGlobalContext();
|
|
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
|
|
|
|
// Initialize targets first, so that --version shows registered targets.
|
|
InitializeAllTargets();
|
|
InitializeAllAsmPrinters();
|
|
InitializeAllAsmParsers();
|
|
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
|
|
|
|
// Load the module to be compiled...
|
|
SMDiagnostic Err;
|
|
std::auto_ptr<Module> M;
|
|
|
|
M.reset(ParseIRFile(InputFilename, Err, Context));
|
|
if (M.get() == 0) {
|
|
Err.Print(argv[0], errs());
|
|
return 1;
|
|
}
|
|
Module &mod = *M.get();
|
|
|
|
// If we are supposed to override the target triple, do so now.
|
|
if (!TargetTriple.empty())
|
|
mod.setTargetTriple(Triple::normalize(TargetTriple));
|
|
|
|
Triple TheTriple(mod.getTargetTriple());
|
|
if (TheTriple.getTriple().empty())
|
|
TheTriple.setTriple(sys::getHostTriple());
|
|
|
|
// Allocate target machine. First, check whether the user has explicitly
|
|
// specified an architecture to compile for. If so we have to look it up by
|
|
// name, because it might be a backend that has no mapping to a target triple.
|
|
const Target *TheTarget = 0;
|
|
if (!MArch.empty()) {
|
|
for (TargetRegistry::iterator it = TargetRegistry::begin(),
|
|
ie = TargetRegistry::end(); it != ie; ++it) {
|
|
if (MArch == it->getName()) {
|
|
TheTarget = &*it;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!TheTarget) {
|
|
errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n";
|
|
return 1;
|
|
}
|
|
|
|
// Adjust the triple to match (if known), otherwise stick with the
|
|
// module/host triple.
|
|
Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
|
|
if (Type != Triple::UnknownArch)
|
|
TheTriple.setArch(Type);
|
|
} else {
|
|
std::string Err;
|
|
TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
|
|
if (TheTarget == 0) {
|
|
errs() << argv[0] << ": error auto-selecting target for module '"
|
|
<< Err << "'. Please use the -march option to explicitly "
|
|
<< "pick a target.\n";
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
// Package up features to be passed to target/subtarget
|
|
std::string FeaturesStr;
|
|
if (MCPU.size() || MAttrs.size()) {
|
|
SubtargetFeatures Features;
|
|
Features.setCPU(MCPU);
|
|
for (unsigned i = 0; i != MAttrs.size(); ++i)
|
|
Features.AddFeature(MAttrs[i]);
|
|
FeaturesStr = Features.getString();
|
|
}
|
|
|
|
std::auto_ptr<TargetMachine>
|
|
target(TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr));
|
|
assert(target.get() && "Could not allocate target machine!");
|
|
TargetMachine &Target = *target.get();
|
|
|
|
if (DisableDotLoc)
|
|
Target.setMCUseLoc(false);
|
|
if (TheTriple.getOS() == Triple::Darwin) {
|
|
switch (TheTriple.getDarwinMajorNumber()) {
|
|
case 7:
|
|
case 8:
|
|
case 9:
|
|
// disable .loc support for older darwin OS.
|
|
Target.setMCUseLoc(false);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Figure out where we are going to send the output...
|
|
OwningPtr<tool_output_file> Out
|
|
(GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
|
|
if (!Out) return 1;
|
|
|
|
CodeGenOpt::Level OLvl = CodeGenOpt::Default;
|
|
switch (OptLevel) {
|
|
default:
|
|
errs() << argv[0] << ": invalid optimization level.\n";
|
|
return 1;
|
|
case ' ': break;
|
|
case '0': OLvl = CodeGenOpt::None; break;
|
|
case '1': OLvl = CodeGenOpt::Less; break;
|
|
case '2': OLvl = CodeGenOpt::Default; break;
|
|
case '3': OLvl = CodeGenOpt::Aggressive; break;
|
|
}
|
|
|
|
// Build up all of the passes that we want to do to the module.
|
|
PassManager PM;
|
|
|
|
// Add the target data from the target machine, if it exists, or the module.
|
|
if (const TargetData *TD = Target.getTargetData())
|
|
PM.add(new TargetData(*TD));
|
|
else
|
|
PM.add(new TargetData(&mod));
|
|
|
|
// Override default to generate verbose assembly.
|
|
Target.setAsmVerbosityDefault(true);
|
|
|
|
if (RelaxAll) {
|
|
if (FileType != TargetMachine::CGFT_ObjectFile)
|
|
errs() << argv[0]
|
|
<< ": warning: ignoring -mc-relax-all because filetype != obj";
|
|
else
|
|
Target.setMCRelaxAll(true);
|
|
}
|
|
|
|
{
|
|
formatted_raw_ostream FOS(Out->os());
|
|
|
|
// Ask the target to add backend passes as necessary.
|
|
if (Target.addPassesToEmitFile(PM, FOS, FileType, OLvl, NoVerify)) {
|
|
errs() << argv[0] << ": target does not support generation of this"
|
|
<< " file type!\n";
|
|
return 1;
|
|
}
|
|
|
|
PM.run(mod);
|
|
}
|
|
|
|
// Declare success.
|
|
Out->keep();
|
|
|
|
return 0;
|
|
}
|