diff options
Diffstat (limited to 'tools/llc/llc.cpp')
-rw-r--r-- | tools/llc/llc.cpp | 204 |
1 files changed, 118 insertions, 86 deletions
diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp index ae03c1e..b94e5fb 100644 --- a/tools/llc/llc.cpp +++ b/tools/llc/llc.cpp @@ -13,35 +13,35 @@ // //===----------------------------------------------------------------------===// -#include "llvm/Bitcode/ReaderWriter.h" -#include "llvm/CodeGen/FileWriters.h" -#include "llvm/CodeGen/LinkAllCodegenComponents.h" -#include "llvm/CodeGen/LinkAllAsmWriterComponents.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 "llvm/ADT/Triple.h" +#include "llvm/Analysis/Verifier.h" +#include "llvm/Support/IRReader.h" +#include "llvm/CodeGen/FileWriters.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/Support/CommandLine.h" #include "llvm/Support/FileUtilities.h" +#include "llvm/Support/FormattedStream.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/Host.h" #include "llvm/System/Signals.h" -#include "llvm/Config/config.h" -#include "llvm/LinkAllVMCore.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 <fstream> -#include <iostream> +#include "llvm/Transforms/Scalar.h" #include <memory> using namespace llvm; @@ -55,7 +55,8 @@ InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-")); static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename")); -static cl::opt<bool> Force("f", cl::desc("Overwrite output files")); +static cl::opt<bool> +Force("f", cl::desc("Enable binary output on terminals")); // Determine optimization level. static cl::opt<char> @@ -69,9 +70,8 @@ OptLevel("O", static cl::opt<std::string> TargetTriple("mtriple", cl::desc("Override target triple for module")); -static cl::opt<const TargetMachineRegistry::entry*, false, - RegistryParser<TargetMachine> > -MArch("march", cl::desc("Architecture to generate code for:")); +static cl::opt<std::string> +MArch("march", cl::desc("Architecture to generate code for (see --version)")); static cl::opt<std::string> MCPU("mcpu", @@ -119,7 +119,9 @@ 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; @@ -127,37 +129,34 @@ GetFileNameRoot(const std::string &InputFilename) { return outputFilename; } -static raw_ostream *GetOutputStream(const char *ProgName) { +static formatted_raw_ostream *GetOutputStream(const char *TargetName, + 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; - } + 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_ostream *Out = new raw_fd_ostream(OutputFilename.c_str(), true, error); + raw_fd_ostream *FDOut = + new raw_fd_ostream(OutputFilename.c_str(), error, + raw_fd_ostream::F_Binary); if (!error.empty()) { - std::cerr << error << '\n'; - delete Out; + errs() << error << '\n'; + delete FDOut; return 0; } + formatted_raw_ostream *Out = + new formatted_raw_ostream(*FDOut, formatted_raw_ostream::DELETE_STREAM); return Out; } if (InputFilename == "-") { OutputFilename = "-"; - return &outs(); + return &fouts(); } OutputFilename = GetFileNameRoot(InputFilename); @@ -165,10 +164,10 @@ static raw_ostream *GetOutputStream(const char *ProgName) { bool Binary = false; switch (FileType) { case TargetMachine::AssemblyFile: - if (MArch->Name[0] == 'c') { - if (MArch->Name[1] == 0) + if (TargetName[0] == 'c') { + if (TargetName[1] == 0) OutputFilename += ".cbe.c"; - else if (MArch->Name[1] == 'p' && MArch->Name[2] == 'p') + else if (TargetName[1] == 'p' && TargetName[2] == 'p') OutputFilename += ".cpp"; else OutputFilename += ".s"; @@ -185,26 +184,24 @@ static raw_ostream *GetOutputStream(const char *ProgName) { 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); + unsigned OpenFlags = 0; + if (Binary) OpenFlags |= raw_fd_ostream::F_Binary; + raw_fd_ostream *FDOut = new raw_fd_ostream(OutputFilename.c_str(), error, + OpenFlags); if (!error.empty()) { - std::cerr << error << '\n'; - delete Out; + errs() << error << '\n'; + delete FDOut; return 0; } + formatted_raw_ostream *Out = + new formatted_raw_ostream(*FDOut, formatted_raw_ostream::DELETE_STREAM); + return Out; } @@ -213,24 +210,22 @@ static raw_ostream *GetOutputStream(const char *ProgName) { int main(int argc, char **argv) { sys::PrintStackTraceOnErrorSignal(); PrettyStackTraceProgram X(argc, argv); - LLVMContext Context; + LLVMContext &Context = getGlobalContext(); llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. - cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n"); + // Initialize targets first, so that --version shows registered targets. InitializeAllTargets(); InitializeAllAsmPrinters(); + + cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n"); // Load the module to be compiled... - std::string ErrorMessage; + SMDiagnostic Err; std::auto_ptr<Module> M; - std::auto_ptr<MemoryBuffer> Buffer( - MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)); - if (Buffer.get()) - M.reset(ParseBitcodeFile(Buffer.get(), Context, &ErrorMessage)); + M.reset(ParseIRFile(InputFilename, Err, Context)); if (M.get() == 0) { - std::cerr << argv[0] << ": bitcode didn't read correctly.\n"; - std::cerr << "Reason: " << ErrorMessage << "\n"; + Err.Print(argv[0], errs()); return 1; } Module &mod = *M.get(); @@ -239,15 +234,40 @@ int main(int argc, char **argv) { 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) { + 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; - 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"; + 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; } } @@ -262,18 +282,19 @@ int main(int argc, char **argv) { FeaturesStr = Features.getString(); } - std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, FeaturesStr)); + 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... - raw_ostream *Out = GetOutputStream(argv[0]); + formatted_raw_ostream *Out = GetOutputStream(TheTarget->getName(), argv[0]); if (Out == 0) return 1; CodeGenOpt::Level OLvl = CodeGenOpt::Default; switch (OptLevel) { default: - std::cerr << argv[0] << ": invalid optimization level.\n"; + errs() << argv[0] << ": invalid optimization level.\n"; return 1; case ' ': break; case '0': OLvl = CodeGenOpt::None; break; @@ -286,15 +307,21 @@ int main(int argc, char **argv) { // used by strange things like the C backend. if (Target.WantsWholeFile()) { PassManager PM; - PM.add(new TargetData(*Target.getTargetData())); + + // 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 (!NoVerify) PM.add(createVerifierPass()); // 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; + 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; @@ -304,7 +331,12 @@ int main(int argc, char **argv) { // 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())); + + // 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)); #ifndef NDEBUG if (!NoVerify) @@ -312,7 +344,7 @@ int main(int argc, char **argv) { #endif // Ask the target to add backend passes as necessary. - MachineCodeEmitter *MCE = 0; + ObjectCodeEmitter *OCE = 0; // Override default to generate verbose assembly. Target.setAsmVerbosityDefault(true); @@ -322,26 +354,26 @@ int main(int argc, char **argv) { 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; + 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: - MCE = AddMachOWriter(Passes, *Out, Target); + OCE = AddMachOWriter(Passes, *Out, Target); break; case FileModel::ElfFile: - MCE = AddELFWriter(Passes, *Out, Target); + OCE = AddELFWriter(Passes, *Out, Target); break; } - if (Target.addPassesToEmitFileFinish(Passes, MCE, OLvl)) { - std::cerr << argv[0] << ": target does not support generation of this" - << " file type!\n"; - if (Out != &outs()) delete Out; + if (Target.addPassesToEmitFileFinish(Passes, OCE, 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; @@ -364,7 +396,7 @@ int main(int argc, char **argv) { } // Delete the ostream if it's not a stdout stream - if (Out != &outs()) delete Out; + if (Out != &fouts()) delete Out; return 0; } |