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07b85fee55
There is no real reason the index has to have the concept of an exporting Module. We should be able to have one single unique instance of the Index, and it should be read-only after creation for the whole ThinLTO processing. The linker plugin should be able to process multiple modules (in parallel or in sequence) with the same index. The only reason the ExportingModule was present seems to be to implement hasExportedFunctions() that is used by the Module linker to decide what to do with the current Module. For now I replaced it with a query to the map of Modules path to see if this module was declared in the Index and consider that if it is the case then it is probably exporting function. On the long term the Linker interface needs to evolve and this call should not be needed anymore. From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 254581
111 lines
4.1 KiB
C++
111 lines
4.1 KiB
C++
//===- FunctionIndexObjectFile.h - Function index file implementation -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the FunctionIndexObjectFile template class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECT_FUNCTIONINDEXOBJECTFILE_H
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#define LLVM_OBJECT_FUNCTIONINDEXOBJECTFILE_H
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#include "llvm/IR/DiagnosticInfo.h"
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#include "llvm/Object/SymbolicFile.h"
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namespace llvm {
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class FunctionInfoIndex;
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class Module;
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namespace object {
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class ObjectFile;
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/// This class is used to read just the function summary index related
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/// sections out of the given object (which may contain a single module's
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/// bitcode or be a combined index bitcode file). It builds a FunctionInfoIndex
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/// object.
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class FunctionIndexObjectFile : public SymbolicFile {
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std::unique_ptr<FunctionInfoIndex> Index;
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public:
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FunctionIndexObjectFile(MemoryBufferRef Object,
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std::unique_ptr<FunctionInfoIndex> I);
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~FunctionIndexObjectFile() override;
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// TODO: Walk through FunctionMap entries for function symbols.
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// However, currently these interfaces are not used by any consumers.
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void moveSymbolNext(DataRefImpl &Symb) const override {
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llvm_unreachable("not implemented");
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}
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std::error_code printSymbolName(raw_ostream &OS,
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DataRefImpl Symb) const override {
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llvm_unreachable("not implemented");
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return std::error_code();
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}
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uint32_t getSymbolFlags(DataRefImpl Symb) const override {
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llvm_unreachable("not implemented");
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return 0;
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}
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basic_symbol_iterator symbol_begin_impl() const override {
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llvm_unreachable("not implemented");
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return basic_symbol_iterator(BasicSymbolRef());
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}
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basic_symbol_iterator symbol_end_impl() const override {
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llvm_unreachable("not implemented");
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return basic_symbol_iterator(BasicSymbolRef());
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}
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const FunctionInfoIndex &getIndex() const {
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return const_cast<FunctionIndexObjectFile *>(this)->getIndex();
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}
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FunctionInfoIndex &getIndex() { return *Index; }
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std::unique_ptr<FunctionInfoIndex> takeIndex();
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static inline bool classof(const Binary *v) { return v->isFunctionIndex(); }
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/// \brief Finds and returns bitcode embedded in the given object file, or an
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/// error code if not found.
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static ErrorOr<MemoryBufferRef> findBitcodeInObject(const ObjectFile &Obj);
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/// \brief Finds and returns bitcode in the given memory buffer (which may
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/// be either a bitcode file or a native object file with embedded bitcode),
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/// or an error code if not found.
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static ErrorOr<MemoryBufferRef>
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findBitcodeInMemBuffer(MemoryBufferRef Object);
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/// \brief Looks for function summary in the given memory buffer,
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/// returns true if found, else false.
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static bool
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hasFunctionSummaryInMemBuffer(MemoryBufferRef Object,
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DiagnosticHandlerFunction DiagnosticHandler);
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/// \brief Parse function index in the given memory buffer.
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/// Return new FunctionIndexObjectFile instance containing parsed function
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/// summary/index.
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static ErrorOr<std::unique_ptr<FunctionIndexObjectFile>>
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create(MemoryBufferRef Object, DiagnosticHandlerFunction DiagnosticHandler,
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bool IsLazy = false);
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/// \brief Parse the function summary information for function with the
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/// given name out of the given buffer. Parsed information is
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/// stored on the index object saved in this object.
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std::error_code
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findFunctionSummaryInMemBuffer(MemoryBufferRef Object,
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DiagnosticHandlerFunction DiagnosticHandler,
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StringRef FunctionName);
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};
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}
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/// Parse the function index out of an IR file and return the function
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/// index object if found, or nullptr if not.
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ErrorOr<std::unique_ptr<FunctionInfoIndex>>
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getFunctionIndexForFile(StringRef Path,
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DiagnosticHandlerFunction DiagnosticHandler);
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}
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#endif
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