X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllc%2Fllc.cpp;h=f81495cc7ea3b80a861b6cd15739a01f82700584;hb=0b8c9a80f20772c3793201ab5b251d3520b9cea3;hp=423cf471ee2d807e4cc4ded00f60036f922e9984;hpb=17e9edc4a7bbeadf756494cf39fcacc9eff72202;p=oota-llvm.git diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp index 423cf471ee2..f81495cc7ea 100644 --- a/tools/llc/llc.cpp +++ b/tools/llc/llc.cpp @@ -13,35 +13,32 @@ // //===----------------------------------------------------------------------===// -#include "llvm/LLVMContext.h" -#include "llvm/Module.h" -#include "llvm/ModuleProvider.h" -#include "llvm/PassManager.h" -#include "llvm/Pass.h" +#include "llvm/IR/LLVMContext.h" #include "llvm/ADT/Triple.h" -#include "llvm/Analysis/Verifier.h" -#include "llvm/Bitcode/ReaderWriter.h" -#include "llvm/CodeGen/FileWriters.h" +#include "llvm/Assembly/PrintModulePass.h" +#include "llvm/CodeGen/CommandFlags.h" #include "llvm/CodeGen/LinkAllAsmWriterComponents.h" #include "llvm/CodeGen/LinkAllCodegenComponents.h" -#include "llvm/CodeGen/ObjectCodeEmitter.h" -#include "llvm/Config/config.h" -#include "llvm/LinkAllVMCore.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/IR/Module.h" +#include "llvm/MC/SubtargetFeature.h" +#include "llvm/Pass.h" +#include "llvm/PassManager.h" #include "llvm/Support/CommandLine.h" -#include "llvm/Support/FileUtilities.h" +#include "llvm/Support/Debug.h" #include "llvm/Support/FormattedStream.h" +#include "llvm/Support/Host.h" +#include "llvm/Support/IRReader.h" #include "llvm/Support/ManagedStatic.h" -#include "llvm/Support/MemoryBuffer.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/Support/Signals.h" +#include "llvm/Support/TargetRegistry.h" +#include "llvm/Support/TargetSelect.h" +#include "llvm/Support/ToolOutputFile.h" +#include "llvm/Target/TargetLibraryInfo.h" #include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetRegistry.h" -#include "llvm/Target/TargetSelect.h" -#include "llvm/Transforms/Scalar.h" +#include "llvm/TargetTransformInfo.h" #include using namespace llvm; @@ -55,7 +52,10 @@ 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")); +static cl::opt +TimeCompilations("time-compilations", cl::Hidden, cl::init(1u), + cl::value_desc("N"), + cl::desc("Repeat compilation N times for timing")); // Determine optimization level. static cl::opt @@ -69,47 +69,15 @@ OptLevel("O", static cl::opt TargetTriple("mtriple", cl::desc("Override target triple for module")); -static cl::opt -MArch("march", cl::desc("Architecture to generate code for (see --version)")); - -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,...")); - -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)); - cl::opt NoVerify("disable-verify", cl::Hidden, cl::desc("Do not verify input module")); +cl::opt +DisableSimplifyLibCalls("disable-simplify-libcalls", + cl::desc("Disable simplify-libcalls"), + cl::init(false)); -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)); +static int compileModule(char**, LLVMContext&); // GetFileNameRoot - Helper function to get the basename of a filename. static inline std::string @@ -118,7 +86,9 @@ GetFileNameRoot(const std::string &InputFilename) { std::string outputFilename; int Len = IFN.length(); if ((Len > 2) && - IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') { + 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; @@ -126,86 +96,65 @@ GetFileNameRoot(const std::string &InputFilename) { return outputFilename; } -static formatted_raw_ostream *GetOutputStream(const char *TargetName, - const char *ProgName) { - if (OutputFilename != "") { - if (OutputFilename == "-") - return &fouts(); - - // 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_fd_ostream *FDOut = - new raw_fd_ostream(OutputFilename.c_str(), error, - (Force ? raw_fd_ostream::F_Force : 0)| - raw_fd_ostream::F_Binary); - if (!error.empty()) { - errs() << error << '\n'; - if (!Force) - errs() << "Use -f command line argument to force output\n"; - delete FDOut; - return 0; +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) { + 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; + } } - formatted_raw_ostream *Out = - new formatted_raw_ostream(*FDOut, formatted_raw_ostream::DELETE_STREAM); - - return Out; } - if (InputFilename == "-") { - OutputFilename = "-"; - return &fouts(); - } - - OutputFilename = GetFileNameRoot(InputFilename); - + // Decide if we need "binary" output. bool Binary = false; switch (FileType) { - case TargetMachine::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::ObjectFile: - OutputFilename += ".o"; - Binary = true; + case TargetMachine::CGFT_AssemblyFile: break; - case TargetMachine::DynamicLibrary: - OutputFilename += LTDL_SHLIB_EXT; + case TargetMachine::CGFT_ObjectFile: + case TargetMachine::CGFT_Null: Binary = true; break; } - // Make sure that the Out file gets unlinked from the disk if we get a - // SIGINT - sys::RemoveFileOnSignal(sys::Path(OutputFilename)); - + // Open the file. std::string error; unsigned OpenFlags = 0; - if (Force) OpenFlags |= raw_fd_ostream::F_Force; if (Binary) OpenFlags |= raw_fd_ostream::F_Binary; - raw_fd_ostream *FDOut = new raw_fd_ostream(OutputFilename.c_str(), error, - OpenFlags); + tool_output_file *FDOut = new tool_output_file(OutputFilename.c_str(), error, + OpenFlags); if (!error.empty()) { errs() << error << '\n'; - if (!Force) - errs() << "Use -f command line argument to force output\n"; delete FDOut; return 0; } - formatted_raw_ostream *Out = - new formatted_raw_ostream(*FDOut, formatted_raw_ostream::DELETE_STREAM); - - return Out; + return FDOut; } // main - Entry point for the llc compiler. @@ -213,91 +162,89 @@ static formatted_raw_ostream *GetOutputStream(const char *TargetName, 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. + // Initialize targets first, so that --version shows registered targets. InitializeAllTargets(); + InitializeAllTargetMCs(); InitializeAllAsmPrinters(); + InitializeAllAsmParsers(); - cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n"); - - // Load the module to be compiled... - std::string ErrorMessage; - std::auto_ptr M; + // Initialize codegen and IR passes used by llc so that the -print-after, + // -print-before, and -stop-after options work. + PassRegistry *Registry = PassRegistry::getPassRegistry(); + initializeCore(*Registry); + initializeCodeGen(*Registry); + initializeLoopStrengthReducePass(*Registry); + initializeLowerIntrinsicsPass(*Registry); + initializeUnreachableBlockElimPass(*Registry); - std::auto_ptr Buffer( - MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)); - if (Buffer.get()) - M.reset(ParseBitcodeFile(Buffer.get(), Context, &ErrorMessage)); - if (M.get() == 0) { - errs() << argv[0] << ": bitcode didn't read correctly.\n"; - errs() << "Reason: " << ErrorMessage << "\n"; - return 1; - } - Module &mod = *M.get(); + // Register the target printer for --version. + cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); - // If we are supposed to override the target triple, do so now. - if (!TargetTriple.empty()) - mod.setTargetTriple(TargetTriple); + cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n"); - 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; - } - } + // Compile the module TimeCompilations times to give better compile time + // metrics. + for (unsigned I = TimeCompilations; I; --I) + if (int RetVal = compileModule(argv, Context)) + return RetVal; + return 0; +} - if (!TheTarget) { - errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n"; +static int compileModule(char **argv, LLVMContext &Context) { + // Load the module to be compiled... + SMDiagnostic Err; + std::auto_ptr M; + Module *mod = 0; + Triple TheTriple; + + bool SkipModule = MCPU == "help" || + (!MAttrs.empty() && MAttrs.front() == "help"); + + // If user just wants to list available options, skip module loading + if (!SkipModule) { + M.reset(ParseIRFile(InputFilename, Err, Context)); + mod = M.get(); + if (mod == 0) { + Err.print(argv[0], errs()); 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); + // If we are supposed to override the target triple, do so now. + if (!TargetTriple.empty()) + mod->setTargetTriple(Triple::normalize(TargetTriple)); + TheTriple = Triple(mod->getTargetTriple()); } 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; - } + TheTriple = Triple(Triple::normalize(TargetTriple)); + } + + if (TheTriple.getTriple().empty()) + TheTriple.setTriple(sys::getDefaultTargetTriple()); + + // Get the target specific parser. + std::string Error; + const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple, + Error); + if (!TheTarget) { + errs() << argv[0] << ": " << Error; + return 1; } // Package up features to be passed to target/subtarget std::string FeaturesStr; - if (MCPU.size() || MAttrs.size()) { + if (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(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... - formatted_raw_ostream *Out = GetOutputStream(TheTarget->getName(), argv[0]); - if (Out == 0) return 1; - CodeGenOpt::Level OLvl = CodeGenOpt::Default; switch (OptLevel) { default: @@ -305,107 +252,135 @@ int main(int argc, char **argv) { return 1; case ' ': break; case '0': OLvl = CodeGenOpt::None; break; - case '1': + case '1': OLvl = CodeGenOpt::Less; break; case '2': OLvl = CodeGenOpt::Default; break; case '3': OLvl = CodeGenOpt::Aggressive; break; } - // If this target requires addPassesToEmitWholeFile, do it now. This is - // used by strange things like the C backend. - if (Target.WantsWholeFile()) { - PassManager PM; + TargetOptions Options; + Options.LessPreciseFPMADOption = EnableFPMAD; + Options.NoFramePointerElim = DisableFPElim; + Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf; + Options.AllowFPOpFusion = FuseFPOps; + Options.UnsafeFPMath = EnableUnsafeFPMath; + Options.NoInfsFPMath = EnableNoInfsFPMath; + Options.NoNaNsFPMath = EnableNoNaNsFPMath; + Options.HonorSignDependentRoundingFPMathOption = + EnableHonorSignDependentRoundingFPMath; + Options.UseSoftFloat = GenerateSoftFloatCalls; + if (FloatABIForCalls != FloatABI::Default) + Options.FloatABIType = FloatABIForCalls; + Options.NoZerosInBSS = DontPlaceZerosInBSS; + Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt; + Options.DisableTailCalls = DisableTailCalls; + Options.StackAlignmentOverride = OverrideStackAlignment; + Options.RealignStack = EnableRealignStack; + Options.TrapFuncName = TrapFuncName; + Options.PositionIndependentExecutable = EnablePIE; + Options.EnableSegmentedStacks = SegmentedStacks; + Options.UseInitArray = UseInitArray; + Options.SSPBufferSize = SSPBufferSize; + + std::auto_ptr + target(TheTarget->createTargetMachine(TheTriple.getTriple(), + MCPU, FeaturesStr, Options, + RelocModel, CMModel, OLvl)); + assert(target.get() && "Could not allocate target machine!"); + assert(mod && "Should have exited after outputting help!"); + TargetMachine &Target = *target.get(); - // 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)); + if (DisableDotLoc) + Target.setMCUseLoc(false); - if (!NoVerify) - PM.add(createVerifierPass()); + if (DisableCFI) + Target.setMCUseCFI(false); - // Ask the target to add backend passes as necessary. - if (Target.addPassesToEmitWholeFile(PM, *Out, FileType, OLvl)) { - errs() << argv[0] << ": target does not support generation of this" - << " file type!\n"; - if (Out != &fouts()) delete Out; - // And the Out file is empty and useless, so remove it now. - sys::Path(OutputFilename).eraseFromDisk(); - return 1; - } - PM.run(mod); - } else { - // Build up all of the passes that we want to do to the module. - ExistingModuleProvider Provider(M.release()); - FunctionPassManager Passes(&Provider); + if (EnableDwarfDirectory) + Target.setMCUseDwarfDirectory(true); - // Add the target data from the target machine, if it exists, or the module. - if (const TargetData *TD = Target.getTargetData()) - Passes.add(new TargetData(*TD)); - else - Passes.add(new TargetData(&mod)); + if (GenerateSoftFloatCalls) + FloatABIForCalls = FloatABI::Soft; -#ifndef NDEBUG - if (!NoVerify) - Passes.add(createVerifierPass()); -#endif + // Disable .loc support for older OS X versions. + if (TheTriple.isMacOSX() && + TheTriple.isMacOSXVersionLT(10, 6)) + Target.setMCUseLoc(false); - // Ask the target to add backend passes as necessary. - ObjectCodeEmitter *OCE = 0; + // Figure out where we are going to send the output. + OwningPtr Out + (GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0])); + if (!Out) return 1; - // Override default to generate verbose assembly. - Target.setAsmVerbosityDefault(true); + // Build up all of the passes that we want to do to the module. + PassManager PM; - switch (Target.addPassesToEmitFile(Passes, *Out, FileType, OLvl)) { - default: - assert(0 && "Invalid file model!"); - return 1; - case FileModel::Error: - errs() << argv[0] << ": target does not support generation of this" - << " file type!\n"; - if (Out != &fouts()) 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; + // Add an appropriate TargetLibraryInfo pass for the module's triple. + TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple); + if (DisableSimplifyLibCalls) + TLI->disableAllFunctions(); + PM.add(TLI); + + if (target.get()) { + PM.add(new TargetTransformInfo(target->getScalarTargetTransformInfo(), + target->getVectorTargetTransformInfo())); + } + + // Add the target data from the target machine, if it exists, or the module. + if (const DataLayout *TD = Target.getDataLayout()) + PM.add(new DataLayout(*TD)); + else + PM.add(new DataLayout(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()); + + AnalysisID StartAfterID = 0; + AnalysisID StopAfterID = 0; + const PassRegistry *PR = PassRegistry::getPassRegistry(); + if (!StartAfter.empty()) { + const PassInfo *PI = PR->getPassInfo(StartAfter); + if (!PI) { + errs() << argv[0] << ": start-after pass is not registered.\n"; + return 1; + } + StartAfterID = PI->getTypeInfo(); + } + if (!StopAfter.empty()) { + const PassInfo *PI = PR->getPassInfo(StopAfter); + if (!PI) { + errs() << argv[0] << ": stop-after pass is not registered.\n"; + return 1; + } + StopAfterID = PI->getTypeInfo(); } - if (Target.addPassesToEmitFileFinish(Passes, OCE, OLvl)) { + // Ask the target to add backend passes as necessary. + if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify, + StartAfterID, StopAfterID)) { errs() << argv[0] << ": target does not support generation of this" << " file type!\n"; - if (Out != &fouts()) 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. - // 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); - } + // Before executing passes, print the final values of the LLVM options. + cl::PrintOptionValues(); - Passes.doFinalization(); + PM.run(*mod); } - Out->flush(); - - // Delete the ostream if it's not a stdout stream - if (Out != &fouts()) delete Out; + // Declare success. + Out->keep(); return 0; }