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LLVM
4.0.0
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Classes | |
| struct | Config |
| LTO configuration. More... | |
| struct | LTOLLVMContext |
| A derived class of LLVMContext that initializes itself according to a given Config object. More... | |
| class | InputFile |
| An input file. More... | |
| class | NativeObjectStream |
| This class wraps an output stream for a native object. More... | |
| class | LTO |
| This class implements a resolution-based interface to LLVM's LTO functionality. More... | |
| struct | SymbolResolution |
| The resolution for a symbol. More... | |
| class | ThinBackendProc |
| This class defines the interface to the ThinLTO backend. More... | |
Typedefs | |
| typedef std::function< void(unsigned Task, StringRef Path)> | AddFileFn |
| This type defines the callback to add a pre-existing native object file (e.g. More... | |
| typedef std::function < std::unique_ptr < NativeObjectStream >unsigned Task)> | AddStreamFn |
| This type defines the callback to add a native object that is generated on the fly. More... | |
| typedef std::function < AddStreamFn(unsigned Task, StringRef Key)> | NativeObjectCache |
| This is the type of a native object cache. More... | |
| typedef std::function < std::unique_ptr < ThinBackendProc > Config &C, ModuleSummaryIndex &CombinedIndex, StringMap < GVSummaryMapTy > &ModuleToDefinedGVSummaries, AddStreamFn AddStream, NativeObjectCache Cache)> | ThinBackend |
| A ThinBackend defines what happens after the thin-link phase during ThinLTO. More... | |
Functions | |
| NativeObjectCache | localCache (std::string CacheDirectoryPath, AddFileFn AddFile) |
| Create a local file system cache which uses the given cache directory and file callback. More... | |
| std::string | getThinLTOOutputFile (const std::string &Path, const std::string &OldPrefix, const std::string &NewPrefix) |
Given the original Path to an output file, replace any path prefix matching OldPrefix with NewPrefix. More... | |
| ThinBackend | createInProcessThinBackend (unsigned ParallelismLevel) |
| This ThinBackend runs the individual backend jobs in-process. More... | |
| ThinBackend | createWriteIndexesThinBackend (std::string OldPrefix, std::string NewPrefix, bool ShouldEmitImportsFiles, std::string LinkedObjectsFile) |
| This ThinBackend writes individual module indexes to files, instead of running the individual backend jobs. More... | |
| Error | backend (Config &C, AddStreamFn AddStream, unsigned ParallelCodeGenParallelismLevel, std::unique_ptr< Module > M) |
| Runs a regular LTO backend. More... | |
| Error | thinBackend (Config &C, unsigned Task, AddStreamFn AddStream, Module &M, ModuleSummaryIndex &CombinedIndex, const FunctionImporter::ImportMapTy &ImportList, const GVSummaryMapTy &DefinedGlobals, MapVector< StringRef, BitcodeModule > &ModuleMap) |
| Runs a ThinLTO backend. More... | |
| typedef std::function<void(unsigned Task, StringRef Path)> llvm::lto::AddFileFn |
| typedef std::function<std::unique_ptr<NativeObjectStream>unsigned Task)> llvm::lto::AddStreamFn |
| typedef std::function<AddStreamFn(unsigned Task, StringRef Key)> llvm::lto::NativeObjectCache |
This is the type of a native object cache.
To request an item from the cache, pass a unique string as the Key. For hits, the cached file will be added to the link and this function will return AddStreamFn(). For misses, the cache will return a stream callback which must be called at most once to produce content for the stream. The native object stream produced by the stream callback will add the file to the link after the stream is written to.
Clients generally look like this:
if (AddStreamFn AddStream = Cache(Task, Key)) ProduceContent(AddStream);
| typedef std::function<std::unique_ptr<ThinBackendProc> Config &C, ModuleSummaryIndex &CombinedIndex, StringMap<GVSummaryMapTy> &ModuleToDefinedGVSummaries, AddStreamFn AddStream, NativeObjectCache Cache)> llvm::lto::ThinBackend |
| Error llvm::lto::backend | ( | Config & | C, |
| AddStreamFn | AddStream, | ||
| unsigned | ParallelCodeGenParallelismLevel, | ||
| std::unique_ptr< Module > | M | ||
| ) |
Runs a regular LTO backend.
Definition at line 292 of file LTOBackend.cpp.
References codegen(), llvm::lto::Config::CodeGenOnly, handleAsmUndefinedRefs(), llvm::splitCodeGen(), llvm::Error::success(), and llvm::Expected< T >::takeError().
| ThinBackend llvm::lto::createInProcessThinBackend | ( | unsigned | ParallelismLevel | ) |
| ThinBackend llvm::lto::createWriteIndexesThinBackend | ( | std::string | OldPrefix, |
| std::string | NewPrefix, | ||
| bool | ShouldEmitImportsFiles, | ||
| std::string | LinkedObjectsFile | ||
| ) |
This ThinBackend writes individual module indexes to files, instead of running the individual backend jobs.
This backend is for distributed builds where separate processes will invoke the real backends.
To find the path to write the index to, the backend checks if the path has a prefix of OldPrefix; if so, it replaces that prefix with NewPrefix. It then appends ".thinlto.bc" and writes the index to that path. If ShouldEmitImportsFiles is true it also writes a list of imported files to a similar path with ".imports" appended instead.
| std::string llvm::lto::getThinLTOOutputFile | ( | const std::string & | Path, |
| const std::string & | OldPrefix, | ||
| const std::string & | NewPrefix | ||
| ) |
Given the original Path to an output file, replace any path prefix matching OldPrefix with NewPrefix.
Also, create the resulting directory if it does not yet exist.
Definition at line 745 of file LTO.cpp.
References llvm::sys::fs::create_directories(), llvm::StringRef::empty(), llvm::errs(), llvm::sys::path::parent_path(), llvm::sys::path::replace_path_prefix(), and llvm::SmallString< InternalLen >::str().
| NativeObjectCache llvm::lto::localCache | ( | std::string | CacheDirectoryPath, |
| AddFileFn | AddFile | ||
| ) |
Create a local file system cache which uses the given cache directory and file callback.
Definition at line 49 of file Caching.cpp.
References llvm::sys::path::append(), commitEntry(), llvm::sys::fs::createTemporaryFile(), llvm::errs(), llvm::sys::fs::exists(), llvm::report_fatal_error(), and llvm::SmallString< InternalLen >::str().
| Error llvm::lto::thinBackend | ( | Config & | C, |
| unsigned | Task, | ||
| AddStreamFn | AddStream, | ||
| Module & | M, | ||
| ModuleSummaryIndex & | CombinedIndex, | ||
| const FunctionImporter::ImportMapTy & | ImportList, | ||
| const GVSummaryMapTy & | DefinedGlobals, | ||
| MapVector< StringRef, BitcodeModule > & | ModuleMap | ||
| ) |
Runs a ThinLTO backend.
Definition at line 317 of file LTOBackend.cpp.
References assert(), codegen(), llvm::lto::Config::CodeGenOnly, llvm::MapVector< KeyT, ValueT, MapType, VectorType >::end(), llvm::MapVector< KeyT, ValueT, MapType, VectorType >::find(), llvm::Module::getContext(), llvm::Module::getTargetTriple(), handleAsmUndefinedRefs(), I, llvm::FunctionImporter::importFunctions(), llvm::LLVMContext::isODRUniquingDebugTypes(), llvm::lto::Config::PostImportModuleHook, llvm::lto::Config::PostInternalizeModuleHook, llvm::lto::Config::PostPromoteModuleHook, llvm::lto::Config::PreOptModuleHook, llvm::renameModuleForThinLTO(), llvm::Error::success(), llvm::Expected< T >::takeError(), llvm::thinLTOInternalizeModule(), and llvm::thinLTOResolveWeakForLinkerModule().
1.8.6