X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllc%2Fllc.cpp;h=42d158cf5ec6dae4601769d135e0fce31a43a85d;hb=ac57e6e498abccb117e0d61c2fa0f733845e50cb;hp=62b4a3a490678bdc7a78825719e7515b6e0dbe4e;hpb=86f42bdad93677fa0ca33b27afb0f493028376cb;p=oota-llvm.git diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp index 62b4a3a4906..42d158cf5ec 100644 --- a/tools/llc/llc.cpp +++ b/tools/llc/llc.cpp @@ -1,60 +1,121 @@ //===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===// -// +// // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. -// +// 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 bytecode. +// command-line interface for generating native assembly-language code +// or C code, given LLVM bitcode. // //===----------------------------------------------------------------------===// -#include "llvm/Bytecode/Reader.h" -#include "llvm/Target/TargetMachineImpls.h" +#include "llvm/Bitcode/ReaderWriter.h" +#include "llvm/CodeGen/FileWriters.h" +#include "llvm/CodeGen/LinkAllCodegenComponents.h" +#include "llvm/CodeGen/LinkAllAsmWriterComponents.h" +#include "llvm/CodeGen/ObjectCodeEmitter.h" +#include "llvm/Target/SubtargetFeature.h" +#include "llvm/Target/TargetData.h" #include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetMachineRegistry.h" #include "llvm/Transforms/Scalar.h" +#include "llvm/LLVMContext.h" #include "llvm/Module.h" +#include "llvm/ModuleProvider.h" #include "llvm/PassManager.h" #include "llvm/Pass.h" -#include "Support/CommandLine.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/FileUtilities.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/PluginLoader.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/Support/RegistryParser.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/Analysis/Verifier.h" #include "llvm/System/Signals.h" +#include "llvm/Config/config.h" +#include "llvm/LinkAllVMCore.h" +#include "llvm/Target/TargetSelect.h" #include #include #include - 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 -InputFilename(cl::Positional, cl::desc(""), cl::init("-")); +InputFilename(cl::Positional, cl::desc(""), cl::init("-")); static cl::opt OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename")); static cl::opt Force("f", cl::desc("Overwrite output files")); -enum ArchName { noarch, X86, SparcV9, PowerPC, CBackend }; +// Determine optimization level. +static cl::opt +OptLevel("O", + cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] " + "(default = '-O2')"), + cl::Prefix, + cl::ZeroOrMore, + cl::init(' ')); + +static cl::opt +TargetTriple("mtriple", cl::desc("Override target triple for module")); + +static cl::opt > +MArch("march", cl::desc("Architecture to generate code for:")); + +static cl::opt +MCPU("mcpu", + cl::desc("Target a specific cpu type (-mcpu=help for details)"), + cl::value_desc("cpu-name"), + cl::init("")); + +static cl::list +MAttrs("mattr", + cl::CommaSeparated, + cl::desc("Target specific attributes (-mattr=help for details)"), + cl::value_desc("a1,+a2,-a3,...")); -static cl::opt -Arch("march", cl::desc("Architecture to generate assembly for:"), cl::Prefix, - cl::values(clEnumValN(X86, "x86", " IA-32 (Pentium and above)"), - clEnumValN(SparcV9, "sparcv9", " SPARC V9"), - clEnumValN(PowerPC, "powerpc", " PowerPC (experimental)"), - clEnumValN(CBackend, "c", " C backend"), - 0), - cl::init(noarch)); +cl::opt +FileType("filetype", cl::init(TargetMachine::AssemblyFile), + cl::desc("Choose a file type (not all types are supported by all targets):"), + cl::values( + clEnumValN(TargetMachine::AssemblyFile, "asm", + "Emit an assembly ('.s') file"), + clEnumValN(TargetMachine::ObjectFile, "obj", + "Emit a native object ('.o') file [experimental]"), + clEnumValN(TargetMachine::DynamicLibrary, "dynlib", + "Emit a native dynamic library ('.so') file" + " [experimental]"), + clEnumValEnd)); -// GetFileNameRoot - Helper function to get the basename of a filename... +cl::opt NoVerify("disable-verify", cl::Hidden, + cl::desc("Do not verify input module")); + + +static cl::opt +DisableRedZone("disable-red-zone", + cl::desc("Do not emit code that uses the red zone."), + cl::init(false)); + +static cl::opt +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) -{ +GetFileNameRoot(const std::string &InputFilename) { std::string IFN = InputFilename; std::string outputFilename; int Len = IFN.length(); @@ -67,149 +128,244 @@ GetFileNameRoot(const std::string &InputFilename) return outputFilename; } +static raw_ostream *GetOutputStream(const char *ProgName) { + if (OutputFilename != "") { + if (OutputFilename == "-") + return &outs(); + + // Specified an output filename? + if (!Force && std::ifstream(OutputFilename.c_str())) { + // If force is not specified, make sure not to overwrite a file! + std::cerr << ProgName << ": error opening '" << OutputFilename + << "': file exists!\n" + << "Use -f command line argument to force output\n"; + return 0; + } + // Make sure that the Out file gets unlinked from the disk if we get a + // SIGINT + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); + + std::string error; + raw_ostream *Out = new raw_fd_ostream(OutputFilename.c_str(), true, error); + if (!error.empty()) { + std::cerr << error << '\n'; + delete Out; + return 0; + } + + return Out; + } + + if (InputFilename == "-") { + OutputFilename = "-"; + return &outs(); + } + + OutputFilename = GetFileNameRoot(InputFilename); + + bool Binary = false; + switch (FileType) { + case TargetMachine::AssemblyFile: + if (MArch->Name[0] == 'c') { + if (MArch->Name[1] == 0) + OutputFilename += ".cbe.c"; + else if (MArch->Name[1] == 'p' && MArch->Name[2] == 'p') + OutputFilename += ".cpp"; + else + OutputFilename += ".s"; + } else + OutputFilename += ".s"; + break; + case TargetMachine::ObjectFile: + OutputFilename += ".o"; + Binary = true; + break; + case TargetMachine::DynamicLibrary: + OutputFilename += LTDL_SHLIB_EXT; + Binary = true; + break; + } + + if (!Force && std::ifstream(OutputFilename.c_str())) { + // If force is not specified, make sure not to overwrite a file! + std::cerr << ProgName << ": error opening '" << OutputFilename + << "': file exists!\n" + << "Use -f command line argument to force output\n"; + return 0; + } + + // Make sure that the Out file gets unlinked from the disk if we get a + // SIGINT + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); + + std::string error; + raw_ostream *Out = new raw_fd_ostream(OutputFilename.c_str(), Binary, error); + if (!error.empty()) { + std::cerr << error << '\n'; + delete Out; + return 0; + } + + return Out; +} // main - Entry point for the llc compiler. // int main(int argc, char **argv) { - cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n"); - PrintStackTraceOnErrorSignal(); + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + LLVMContext Context; + llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. + cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n"); + InitializeAllTargets(); + InitializeAllAsmPrinters(); + // Load the module to be compiled... - std::auto_ptr M(ParseBytecodeFile(InputFilename)); + std::string ErrorMessage; + std::auto_ptr M; + + std::auto_ptr Buffer( + MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)); + if (Buffer.get()) + M.reset(ParseBitcodeFile(Buffer.get(), Context, &ErrorMessage)); if (M.get() == 0) { - std::cerr << argv[0] << ": bytecode didn't read correctly.\n"; + std::cerr << argv[0] << ": bitcode didn't read correctly.\n"; + std::cerr << "Reason: " << ErrorMessage << "\n"; return 1; } Module &mod = *M.get(); + // If we are supposed to override the target triple, do so now. + if (!TargetTriple.empty()) + mod.setTargetTriple(TargetTriple); + // Allocate target machine. First, check whether the user has // explicitly specified an architecture to compile for. - TargetMachine* (*TargetMachineAllocator)(const Module&, - IntrinsicLowering *) = 0; - switch (Arch) { - case CBackend: - TargetMachineAllocator = allocateCTargetMachine; - break; - case X86: - TargetMachineAllocator = allocateX86TargetMachine; - break; - case SparcV9: - TargetMachineAllocator = allocateSparcV9TargetMachine; - break; - case PowerPC: - TargetMachineAllocator = allocatePowerPCTargetMachine; - break; - default: - // Decide what the default target machine should be, by looking at - // the module. This heuristic (ILP32, LE -> IA32; LP64, BE -> - // SPARCV9) is kind of gross, but it will work until we have more - // sophisticated target information to work from. - if (mod.getEndianness() == Module::LittleEndian && - mod.getPointerSize() == Module::Pointer32) { - TargetMachineAllocator = allocateX86TargetMachine; - } else if (mod.getEndianness() == Module::BigEndian && - mod.getPointerSize() == Module::Pointer32) { - TargetMachineAllocator = allocatePowerPCTargetMachine; - } else if (mod.getEndianness() == Module::BigEndian && - mod.getPointerSize() == Module::Pointer64) { - TargetMachineAllocator = allocateSparcV9TargetMachine; - } else { - // If the module is target independent, favor a target which matches the - // current build system. -#if defined(i386) || defined(__i386__) || defined(__x86__) - TargetMachineAllocator = allocateX86TargetMachine; -#elif defined(sparc) || defined(__sparc__) || defined(__sparcv9) - TargetMachineAllocator = allocateSparcV9TargetMachine; -#elif defined(__POWERPC__) || defined(__ppc__) || defined(__APPLE__) - TargetMachineAllocator = allocatePowerPCTargetMachine; -#else - std::cerr << argv[0] << ": module does not specify a target to use. " - << "You must use the -march option. If no native target is " - << "available, use -march=c to emit C code.\n"; + if (MArch == 0) { + std::string Err; + MArch = TargetMachineRegistry::getClosestStaticTargetForModule(mod, Err); + if (MArch == 0) { + std::cerr << argv[0] << ": error auto-selecting target for module '" + << Err << "'. Please use the -march option to explicitly " + << "pick a target.\n"; return 1; -#endif - } - break; + } + } + + // 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 target(TargetMachineAllocator(mod, 0)); + + std::auto_ptr target(MArch->CtorFn(mod, FeaturesStr)); assert(target.get() && "Could not allocate target machine!"); TargetMachine &Target = *target.get(); - const TargetData &TD = Target.getTargetData(); - // Build up all of the passes that we want to do to the module... - PassManager Passes; + // Figure out where we are going to send the output... + raw_ostream *Out = GetOutputStream(argv[0]); + if (Out == 0) return 1; - Passes.add(new TargetData("llc", TD.isLittleEndian(), TD.getPointerSize(), - TD.getPointerAlignment(), TD.getDoubleAlignment())); + CodeGenOpt::Level OLvl = CodeGenOpt::Default; + switch (OptLevel) { + default: + std::cerr << argv[0] << ": invalid optimization level.\n"; + return 1; + case ' ': break; + case '0': OLvl = CodeGenOpt::None; break; + case '1': + case '2': OLvl = CodeGenOpt::Default; break; + case '3': OLvl = CodeGenOpt::Aggressive; break; + } - // Figure out where we are going to send the output... - std::ostream *Out = 0; - if (OutputFilename != "") { - if (OutputFilename != "-") { - // Specified an output filename? - if (!Force && std::ifstream(OutputFilename.c_str())) { - // If force is not specified, make sure not to overwrite a file! - std::cerr << argv[0] << ": error opening '" << OutputFilename - << "': file exists!\n" - << "Use -f command line argument to force output\n"; - return 1; - } - Out = new std::ofstream(OutputFilename.c_str()); + // If this target requires addPassesToEmitWholeFile, do it now. This is + // used by strange things like the C backend. + if (Target.WantsWholeFile()) { + PassManager PM; + PM.add(new TargetData(*Target.getTargetData())); + if (!NoVerify) + PM.add(createVerifierPass()); - // Make sure that the Out file gets unlinked from the disk if we get a - // SIGINT - RemoveFileOnSignal(OutputFilename); - } else { - Out = &std::cout; + // Ask the target to add backend passes as necessary. + if (Target.addPassesToEmitWholeFile(PM, *Out, FileType, OLvl)) { + std::cerr << argv[0] << ": target does not support generation of this" + << " file type!\n"; + if (Out != &outs()) delete Out; + // And the Out file is empty and useless, so remove it now. + sys::Path(OutputFilename).eraseFromDisk(); + return 1; } + PM.run(mod); } else { - if (InputFilename == "-") { - OutputFilename = "-"; - Out = &std::cout; - } else { - OutputFilename = GetFileNameRoot(InputFilename); + // Build up all of the passes that we want to do to the module. + ExistingModuleProvider Provider(M.release()); + FunctionPassManager Passes(&Provider); + Passes.add(new TargetData(*Target.getTargetData())); - if (Arch != CBackend) - OutputFilename += ".s"; - else - OutputFilename += ".cbe.c"; - - if (!Force && std::ifstream(OutputFilename.c_str())) { - // If force is not specified, make sure not to overwrite a file! - std::cerr << argv[0] << ": error opening '" << OutputFilename - << "': file exists!\n" - << "Use -f command line argument to force output\n"; - return 1; - } - - Out = new std::ofstream(OutputFilename.c_str()); - if (!Out->good()) { - std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n"; - delete Out; - return 1; - } - - // Make sure that the Out file gets unlinked from the disk if we get a - // SIGINT - RemoveFileOnSignal(OutputFilename); +#ifndef NDEBUG + if (!NoVerify) + Passes.add(createVerifierPass()); +#endif + + // Ask the target to add backend passes as necessary. + ObjectCodeEmitter *OCE = 0; + + // Override default to generate verbose assembly. + Target.setAsmVerbosityDefault(true); + + switch (Target.addPassesToEmitFile(Passes, *Out, FileType, OLvl)) { + default: + assert(0 && "Invalid file model!"); + return 1; + case FileModel::Error: + std::cerr << argv[0] << ": target does not support generation of this" + << " file type!\n"; + if (Out != &outs()) delete Out; + // And the Out file is empty and useless, so remove it now. + sys::Path(OutputFilename).eraseFromDisk(); + return 1; + case FileModel::AsmFile: + break; + case FileModel::MachOFile: + OCE = AddMachOWriter(Passes, *Out, Target); + break; + case FileModel::ElfFile: + OCE = AddELFWriter(Passes, *Out, Target); + break; } - } - // Ask the target to add backend passes as necessary - if (Target.addPassesToEmitAssembly(Passes, *Out)) { - std::cerr << argv[0] << ": target '" << Target.getName() - << "' does not support static compilation!\n"; - if (Out != &std::cout) delete Out; - // And the Out file is empty and useless, so remove it now. - std::remove(OutputFilename.c_str()); - return 1; - } else { + if (Target.addPassesToEmitFileFinish(Passes, OCE, OLvl)) { + std::cerr << argv[0] << ": target does not support generation of this" + << " file type!\n"; + if (Out != &outs()) delete Out; + // And the Out file is empty and useless, so remove it now. + sys::Path(OutputFilename).eraseFromDisk(); + return 1; + } + + Passes.doInitialization(); + // Run our queue of passes all at once now, efficiently. - Passes.run(*M.get()); + // TODO: this could lazily stream functions out of the module. + for (Module::iterator I = mod.begin(), E = mod.end(); I != E; ++I) + if (!I->isDeclaration()) { + if (DisableRedZone) + I->addFnAttr(Attribute::NoRedZone); + if (NoImplicitFloats) + I->addFnAttr(Attribute::NoImplicitFloat); + Passes.run(*I); + } + + Passes.doFinalization(); } // Delete the ostream if it's not a stdout stream - if (Out != &std::cout) delete Out; + if (Out != &outs()) delete Out; return 0; }