X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllc%2Fllc.cpp;h=357eedd0b68e433540e5915902e951496d39b5c6;hb=966083fd1ad5adf801b767bba008ebaf0b9e06fa;hp=3176b4ce7432c51d076dc0d0f586706260d3733a;hpb=364d1203e7adaededf3c01f58bd968ee61f4a316;p=oota-llvm.git diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp index 3176b4ce743..357eedd0b68 100644 --- a/tools/llc/llc.cpp +++ b/tools/llc/llc.cpp @@ -1,34 +1,42 @@ //===-- 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 is the llc code generator. +// 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. // //===----------------------------------------------------------------------===// #include "llvm/Bytecode/Reader.h" -#include "llvm/Target/TargetMachineImpls.h" +#include "llvm/Target/SubtargetFeature.h" #include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetMachineRegistry.h" #include "llvm/Transforms/Scalar.h" #include "llvm/Module.h" #include "llvm/PassManager.h" #include "llvm/Pass.h" -#include "Support/CommandLine.h" -#include "Support/Signals.h" -#include +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/PluginLoader.h" +#include "llvm/Support/FileUtilities.h" +#include "llvm/Analysis/Verifier.h" +#include "llvm/System/Signals.h" +#include "llvm/Config/config.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("-")); @@ -37,21 +45,46 @@ OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename")); static cl::opt Force("f", cl::desc("Overwrite output files")); -enum ArchName { noarch, X86, Sparc, PowerPC, CBackend }; +static cl::opt Fast("fast", + cl::desc("Generate code quickly, potentially sacrificing code quality")); -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(Sparc, "sparc", " SPARC V9"), - clEnumValN(PowerPC, "powerpc", " PowerPC"), - clEnumValN(CBackend, "c", " C backend"), - 0), - cl::init(noarch)); +static cl::opt +TargetTriple("mtriple", cl::desc("Override target triple for module")); + +static cl::opt +MArch("march", cl::desc("Architecture to generate code for:")); -// GetFileNameRoot - Helper function to get the basename of a filename... +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"), + clEnumValEnd)); + +cl::opt NoVerify("disable-verify", cl::Hidden, + cl::desc("Do not verify input module")); + + +// 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(); @@ -68,145 +101,143 @@ GetFileNameRoot(const std::string &InputFilename) // main - Entry point for the llc compiler. // int main(int argc, char **argv) { - cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n"); - PrintStackTraceOnErrorSignal(); - - // Load the module to be compiled... - std::auto_ptr M(ParseBytecodeFile(InputFilename)); - if (M.get() == 0) { - std::cerr << argv[0] << ": bytecode didn't read correctly.\n"; - return 1; - } - Module &mod = *M.get(); - - // 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 Sparc: - TargetMachineAllocator = allocateSparcTargetMachine; - 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 = allocateSparcTargetMachine; - } 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 = allocateSparcTargetMachine; -#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"; + try { + cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n"); + sys::PrintStackTraceOnErrorSignal(); + + // Load the module to be compiled... + std::auto_ptr M(ParseBytecodeFile(InputFilename)); + if (M.get() == 0) { + std::cerr << argv[0] << ": bytecode didn't read correctly.\n"; return 1; -#endif - } - break; - } - std::auto_ptr target(TargetMachineAllocator(mod, 0)); - 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; - - Passes.add(new TargetData("llc", TD.isLittleEndian(), TD.getPointerSize(), - TD.getPointerAlignment(), TD.getDoubleAlignment())); - - // 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; + } + 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. + 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; } - Out = new std::ofstream(OutputFilename.c_str()); + } - // Make sure that the Out file gets unlinked from the disk if we get a - // SIGINT - RemoveFileOnSignal(OutputFilename); - } else { - Out = &std::cout; + // 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(); } - } else { - if (InputFilename == "-") { - OutputFilename = "-"; - Out = &std::cout; - } else { - OutputFilename = GetFileNameRoot(InputFilename); - - 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; + + 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; + Passes.add(new TargetData(TD)); + +#ifndef NDEBUG + if(!NoVerify) + Passes.add(createVerifierPass()); +#endif + + // 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()); + + // Make sure that the Out file gets unlinked from the disk if we get a + // SIGINT + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); + } else { + Out = &std::cout; } - - Out = new std::ofstream(OutputFilename.c_str()); - if (!Out->good()) { - std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n"; - delete Out; - return 1; + } else { + if (InputFilename == "-") { + OutputFilename = "-"; + Out = &std::cout; + } else { + OutputFilename = GetFileNameRoot(InputFilename); + + switch (FileType) { + case TargetMachine::AssemblyFile: + if (MArch->Name[0] != 'c' || MArch->Name[1] != 0) // not CBE + OutputFilename += ".s"; + else + OutputFilename += ".cbe.c"; + break; + case TargetMachine::ObjectFile: + OutputFilename += ".o"; + break; + case TargetMachine::DynamicLibrary: + OutputFilename += LTDL_SHLIB_EXT; + break; + } + + 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 + sys::RemoveFileOnSignal(sys::Path(OutputFilename)); } - - // Make sure that the Out file gets unlinked from the disk if we get a - // SIGINT - RemoveFileOnSignal(OutputFilename); } - } + + // Ask the target to add backend passes as necessary. + if (Target.addPassesToEmitFile(Passes, *Out, FileType, Fast)) { + std::cerr << argv[0] << ": target '" << Target.getName() + << "' does not support generation of this file type!\n"; + if (Out != &std::cout) delete Out; + // And the Out file is empty and useless, so remove it now. + sys::Path(OutputFilename).eraseFromDisk(); + return 1; + } else { + // Run our queue of passes all at once now, efficiently. + Passes.run(*M.get()); + } - // 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"; + // Delete the ostream if it's not a stdout stream 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 { - // Run our queue of passes all at once now, efficiently. - Passes.run(*M.get()); - } - // Delete the ostream if it's not a stdout stream - if (Out != &std::cout) delete Out; - - return 0; + return 0; + } catch (const std::string& msg) { + std::cerr << argv[0] << ": " << msg << "\n"; + } catch (...) { + std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n"; + } + return 1; }