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-rw-r--r--contrib/llvm/tools/llc/llc.cpp330
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diff --git a/contrib/llvm/tools/llc/llc.cpp b/contrib/llvm/tools/llc/llc.cpp
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--- a/contrib/llvm/tools/llc/llc.cpp
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-//===-- 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/System/Host.h"
-#include "llvm/System/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"));
-
-
-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();
-
- // 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;
-}
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