#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/CodeGen/ParallelCG.h"
#include "llvm/IR/AutoUpgrade.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/Linker/Linker.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Object/IRObjectFile.h"
-#include "llvm/Support/FormattedStream.h"
+#include "llvm/Object/FunctionIndexObjectFile.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
static bool generate_api_file = false;
static OutputType TheOutputType = OT_NORMAL;
static unsigned OptLevel = 2;
+ static unsigned Parallelism = 1;
+#ifdef NDEBUG
+ static bool DisableVerify = true;
+#else
+ static bool DisableVerify = false;
+#endif
static std::string obj_path;
static std::string extra_library_path;
static std::string triple;
static std::string mcpu;
+ // When the thinlto plugin option is specified, only read the function
+ // the information from intermediate files and write a combined
+ // global index for the ThinLTO backends.
+ static bool thinlto = false;
// Additional options to pass into the code generator.
// Note: This array will contain all plugin options which are not claimed
// as plugin exclusive to pass to the code generator.
// use only and will not be passed.
static std::vector<const char *> extra;
- static void process_plugin_option(const char* opt_)
+ static void process_plugin_option(const char *opt_)
{
if (opt_ == nullptr)
return;
TheOutputType = OT_SAVE_TEMPS;
} else if (opt == "disable-output") {
TheOutputType = OT_DISABLE;
+ } else if (opt == "thinlto") {
+ thinlto = true;
} else if (opt.size() == 2 && opt[0] == 'O') {
if (opt[1] < '0' || opt[1] > '3')
- report_fatal_error("Optimization level must be between 0 and 3");
+ message(LDPL_FATAL, "Optimization level must be between 0 and 3");
OptLevel = opt[1] - '0';
+ } else if (opt.startswith("jobs=")) {
+ if (StringRef(opt_ + 5).getAsInteger(10, Parallelism))
+ message(LDPL_FATAL, "Invalid parallelism level: %s", opt_ + 5);
+ } else if (opt == "disable-verify") {
+ DisableVerify = true;
} else {
// Save this option to pass to the code generator.
// ParseCommandLineOptions() expects argv[0] to be program name. Lazily
return false;
}
-static void diagnosticHandler(const DiagnosticInfo &DI, void *Context) {
+static void diagnosticHandler(const DiagnosticInfo &DI) {
if (const auto *BDI = dyn_cast<BitcodeDiagnosticInfo>(&DI)) {
std::error_code EC = BDI->getError();
if (EC == BitcodeError::InvalidBitcodeSignature)
message(Level, "LLVM gold plugin: %s", ErrStorage.c_str());
}
+static void diagnosticHandlerForContext(const DiagnosticInfo &DI,
+ void *Context) {
+ diagnosticHandler(DI);
+}
+
/// Called by gold to see whether this file is one that our plugin can handle.
/// We'll try to open it and register all the symbols with add_symbol if
/// possible.
message(LDPL_ERROR, "Failed to get a view of %s", file->name);
return LDPS_ERR;
}
- BufferRef = MemoryBufferRef(StringRef((const char *)view, file->filesize), "");
+ BufferRef =
+ MemoryBufferRef(StringRef((const char *)view, file->filesize), "");
} else {
int64_t offset = 0;
// Gold has found what might be IR part-way inside of a file, such as
BufferRef = Buffer->getMemBufferRef();
}
- Context.setDiagnosticHandler(diagnosticHandler);
+ Context.setDiagnosticHandler(diagnosticHandlerForContext);
ErrorOr<std::unique_ptr<object::IRObjectFile>> ObjOrErr =
object::IRObjectFile::create(BufferRef, Context);
std::error_code EC = ObjOrErr.getError();
cf.handle = file->handle;
+ // If we are doing ThinLTO compilation, don't need to process the symbols.
+ // Later we simply build a combined index file after all files are claimed.
+ if (options::thinlto)
+ return LDPS_OK;
+
for (auto &Sym : Obj->symbols()) {
uint32_t Symflags = Sym.getFlags();
if (shouldSkip(Symflags))
}
if (!cf.syms.empty()) {
- if (add_symbols(cf.handle, cf.syms.size(), &cf.syms[0]) != LDPS_OK) {
+ if (add_symbols(cf.handle, cf.syms.size(), cf.syms.data()) != LDPS_OK) {
message(LDPL_ERROR, "Unable to add symbols!");
return LDPS_ERR;
}
}
namespace {
-class LocalValueMaterializer : public ValueMaterializer {
+class LocalValueMaterializer final : public ValueMaterializer {
DenseSet<GlobalValue *> &Dropped;
DenseMap<GlobalObject *, GlobalObject *> LocalVersions;
Sym.comdat_key = nullptr;
}
+static std::unique_ptr<FunctionInfoIndex>
+getFunctionIndexForFile(claimed_file &F, ld_plugin_input_file &Info) {
+
+ if (get_symbols(F.handle, F.syms.size(), &F.syms[0]) != LDPS_OK)
+ message(LDPL_FATAL, "Failed to get symbol information");
+
+ const void *View;
+ if (get_view(F.handle, &View) != LDPS_OK)
+ message(LDPL_FATAL, "Failed to get a view of file");
+
+ MemoryBufferRef BufferRef(StringRef((const char *)View, Info.filesize),
+ Info.name);
+ ErrorOr<std::unique_ptr<object::FunctionIndexObjectFile>> ObjOrErr =
+ object::FunctionIndexObjectFile::create(BufferRef, diagnosticHandler);
+
+ if (std::error_code EC = ObjOrErr.getError())
+ message(LDPL_FATAL, "Could not read function index bitcode from file : %s",
+ EC.message().c_str());
+
+ object::FunctionIndexObjectFile &Obj = **ObjOrErr;
+
+ return Obj.takeIndex();
+}
+
static std::unique_ptr<Module>
getModuleForFile(LLVMContext &Context, claimed_file &F,
ld_plugin_input_file &Info, raw_fd_ostream *ApiFile,
StringSet<> &Internalize, StringSet<> &Maybe) {
- if (get_symbols(F.handle, F.syms.size(), &F.syms[0]) != LDPS_OK)
+ if (get_symbols(F.handle, F.syms.size(), F.syms.data()) != LDPS_OK)
message(LDPL_FATAL, "Failed to get symbol information");
const void *View;
}
static void runLTOPasses(Module &M, TargetMachine &TM) {
- if (const DataLayout *DL = TM.getDataLayout())
- M.setDataLayout(*DL);
+ M.setDataLayout(TM.createDataLayout());
legacy::PassManager passes;
passes.add(createTargetTransformInfoWrapperPass(TM.getTargetIRAnalysis()));
PassManagerBuilder PMB;
PMB.LibraryInfo = new TargetLibraryInfoImpl(Triple(TM.getTargetTriple()));
PMB.Inliner = createFunctionInliningPass();
+ // Unconditionally verify input since it is not verified before this
+ // point and has unknown origin.
PMB.VerifyInput = true;
- PMB.VerifyOutput = true;
+ PMB.VerifyOutput = !options::DisableVerify;
PMB.LoopVectorize = true;
PMB.SLPVectorize = true;
PMB.OptLevel = options::OptLevel;
raw_fd_ostream OS(Path, EC, sys::fs::OpenFlags::F_None);
if (EC)
message(LDPL_FATAL, "Failed to write the output file.");
- WriteBitcodeToFile(&M, OS);
+ WriteBitcodeToFile(&M, OS, /* ShouldPreserveUseListOrder */ true);
}
-static void codegen(Module &M) {
- const std::string &TripleStr = M.getTargetTriple();
+static void codegen(std::unique_ptr<Module> M) {
+ const std::string &TripleStr = M->getTargetTriple();
Triple TheTriple(TripleStr);
std::string ErrMsg;
TripleStr, options::mcpu, Features.getString(), Options, RelocationModel,
CodeModel::Default, CGOptLevel));
- runLTOPasses(M, *TM);
+ runLTOPasses(*M, *TM);
if (options::TheOutputType == options::OT_SAVE_TEMPS)
- saveBCFile(output_name + ".opt.bc", M);
-
- legacy::PassManager CodeGenPasses;
+ saveBCFile(output_name + ".opt.bc", *M);
SmallString<128> Filename;
- int FD;
- if (options::obj_path.empty()) {
- std::error_code EC =
- sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filename);
- if (EC)
- message(LDPL_FATAL, "Could not create temporary file: %s",
- EC.message().c_str());
- } else {
+ if (!options::obj_path.empty())
Filename = options::obj_path;
- std::error_code EC =
- sys::fs::openFileForWrite(Filename.c_str(), FD, sys::fs::F_None);
- if (EC)
- message(LDPL_FATAL, "Could not open file: %s", EC.message().c_str());
- }
+ else if (options::TheOutputType == options::OT_SAVE_TEMPS)
+ Filename = output_name + ".o";
+ std::vector<SmallString<128>> Filenames(options::Parallelism);
+ bool TempOutFile = Filename.empty();
{
- raw_fd_ostream OS(FD, true);
- formatted_raw_ostream FOS(OS);
+ // Open a file descriptor for each backend thread. This is done in a block
+ // so that the output file descriptors are closed before gold opens them.
+ std::list<llvm::raw_fd_ostream> OSs;
+ std::vector<llvm::raw_pwrite_stream *> OSPtrs(options::Parallelism);
+ for (unsigned I = 0; I != options::Parallelism; ++I) {
+ int FD;
+ if (TempOutFile) {
+ std::error_code EC =
+ sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filenames[I]);
+ if (EC)
+ message(LDPL_FATAL, "Could not create temporary file: %s",
+ EC.message().c_str());
+ } else {
+ Filenames[I] = Filename;
+ if (options::Parallelism != 1)
+ Filenames[I] += utostr(I);
+ std::error_code EC =
+ sys::fs::openFileForWrite(Filenames[I], FD, sys::fs::F_None);
+ if (EC)
+ message(LDPL_FATAL, "Could not open file: %s", EC.message().c_str());
+ }
+ OSs.emplace_back(FD, true);
+ OSPtrs[I] = &OSs.back();
+ }
- if (TM->addPassesToEmitFile(CodeGenPasses, FOS,
- TargetMachine::CGFT_ObjectFile))
- message(LDPL_FATAL, "Failed to setup codegen");
- CodeGenPasses.run(M);
+ // Run backend threads.
+ splitCodeGen(std::move(M), OSPtrs, options::mcpu, Features.getString(),
+ Options, RelocationModel, CodeModel::Default, CGOptLevel);
}
- if (add_input_file(Filename.c_str()) != LDPS_OK)
- message(LDPL_FATAL,
- "Unable to add .o file to the link. File left behind in: %s",
- Filename.c_str());
-
- if (options::obj_path.empty())
- Cleanup.push_back(Filename.c_str());
+ for (auto &Filename : Filenames) {
+ if (add_input_file(Filename.c_str()) != LDPS_OK)
+ message(LDPL_FATAL,
+ "Unable to add .o file to the link. File left behind in: %s",
+ Filename.c_str());
+ if (TempOutFile)
+ Cleanup.push_back(Filename.c_str());
+ }
}
/// gold informs us that all symbols have been read. At this point, we use
return LDPS_OK;
LLVMContext Context;
- Context.setDiagnosticHandler(diagnosticHandler, nullptr, true);
+ Context.setDiagnosticHandler(diagnosticHandlerForContext, nullptr, true);
+
+ // If we are doing ThinLTO compilation, simply build the combined
+ // function index/summary and emit it. We don't need to parse the modules
+ // and link them in this case.
+ if (options::thinlto) {
+ FunctionInfoIndex CombinedIndex;
+ uint64_t NextModuleId = 0;
+ for (claimed_file &F : Modules) {
+ ld_plugin_input_file File;
+ if (get_input_file(F.handle, &File) != LDPS_OK)
+ message(LDPL_FATAL, "Failed to get file information");
+
+ std::unique_ptr<FunctionInfoIndex> Index =
+ getFunctionIndexForFile(F, File);
+ CombinedIndex.mergeFrom(std::move(Index), ++NextModuleId);
+ }
+
+ std::error_code EC;
+ raw_fd_ostream OS(output_name + ".thinlto.bc", EC,
+ sys::fs::OpenFlags::F_None);
+ if (EC)
+ message(LDPL_FATAL, "Unable to open %s.thinlto.bc for writing: %s",
+ output_name.data(), EC.message().c_str());
+ WriteFunctionSummaryToFile(CombinedIndex, OS);
+ OS.close();
+
+ cleanup_hook();
+ exit(0);
+ }
std::unique_ptr<Module> Combined(new Module("ld-temp.o", Context));
Linker L(Combined.get());
return LDPS_OK;
}
- codegen(*L.getModule());
+ codegen(std::move(Combined));
if (!options::extra_library_path.empty() &&
set_extra_library_path(options::extra_library_path.c_str()) != LDPS_OK)
projects / oota-llvm.git / blobdiff