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diff --git a/linux-x64/clang/include/llvm/Bitcode/BitcodeReader.h b/linux-x64/clang/include/llvm/Bitcode/BitcodeReader.h
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+//===- llvm/Bitcode/BitcodeReader.h - Bitcode reader ------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header defines interfaces to read LLVM bitcode files/streams.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_BITCODE_BITCODEREADER_H
+#define LLVM_BITCODE_BITCODEREADER_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Bitcode/BitCodes.h"
+#include "llvm/IR/ModuleSummaryIndex.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <system_error>
+#include <vector>
+namespace llvm {
+
+class LLVMContext;
+class Module;
+
+ // These functions are for converting Expected/Error values to
+ // ErrorOr/std::error_code for compatibility with legacy clients. FIXME:
+ // Remove these functions once no longer needed by the C and libLTO APIs.
+
+ std::error_code errorToErrorCodeAndEmitErrors(LLVMContext &Ctx, Error Err);
+
+ template <typename T>
+ ErrorOr<T> expectedToErrorOrAndEmitErrors(LLVMContext &Ctx, Expected<T> Val) {
+ if (!Val)
+ return errorToErrorCodeAndEmitErrors(Ctx, Val.takeError());
+ return std::move(*Val);
+ }
+
+ struct BitcodeFileContents;
+
+ /// Basic information extracted from a bitcode module to be used for LTO.
+ struct BitcodeLTOInfo {
+ bool IsThinLTO;
+ bool HasSummary;
+ };
+
+ /// Represents a module in a bitcode file.
+ class BitcodeModule {
+ // This covers the identification (if present) and module blocks.
+ ArrayRef<uint8_t> Buffer;
+ StringRef ModuleIdentifier;
+
+ // The string table used to interpret this module.
+ StringRef Strtab;
+
+ // The bitstream location of the IDENTIFICATION_BLOCK.
+ uint64_t IdentificationBit;
+
+ // The bitstream location of this module's MODULE_BLOCK.
+ uint64_t ModuleBit;
+
+ BitcodeModule(ArrayRef<uint8_t> Buffer, StringRef ModuleIdentifier,
+ uint64_t IdentificationBit, uint64_t ModuleBit)
+ : Buffer(Buffer), ModuleIdentifier(ModuleIdentifier),
+ IdentificationBit(IdentificationBit), ModuleBit(ModuleBit) {}
+
+ // Calls the ctor.
+ friend Expected<BitcodeFileContents>
+ getBitcodeFileContents(MemoryBufferRef Buffer);
+
+ Expected<std::unique_ptr<Module>> getModuleImpl(LLVMContext &Context,
+ bool MaterializeAll,
+ bool ShouldLazyLoadMetadata,
+ bool IsImporting);
+
+ public:
+ StringRef getBuffer() const {
+ return StringRef((const char *)Buffer.begin(), Buffer.size());
+ }
+
+ StringRef getStrtab() const { return Strtab; }
+
+ StringRef getModuleIdentifier() const { return ModuleIdentifier; }
+
+ /// Read the bitcode module and prepare for lazy deserialization of function
+ /// bodies. If ShouldLazyLoadMetadata is true, lazily load metadata as well.
+ /// If IsImporting is true, this module is being parsed for ThinLTO
+ /// importing into another module.
+ Expected<std::unique_ptr<Module>> getLazyModule(LLVMContext &Context,
+ bool ShouldLazyLoadMetadata,
+ bool IsImporting);
+
+ /// Read the entire bitcode module and return it.
+ Expected<std::unique_ptr<Module>> parseModule(LLVMContext &Context);
+
+ /// Returns information about the module to be used for LTO: whether to
+ /// compile with ThinLTO, and whether it has a summary.
+ Expected<BitcodeLTOInfo> getLTOInfo();
+
+ /// Parse the specified bitcode buffer, returning the module summary index.
+ Expected<std::unique_ptr<ModuleSummaryIndex>> getSummary();
+
+ /// Parse the specified bitcode buffer and merge its module summary index
+ /// into CombinedIndex.
+ Error readSummary(ModuleSummaryIndex &CombinedIndex, StringRef ModulePath,
+ uint64_t ModuleId);
+ };
+
+ struct BitcodeFileContents {
+ std::vector<BitcodeModule> Mods;
+ StringRef Symtab, StrtabForSymtab;
+ };
+
+ /// Returns the contents of a bitcode file. This includes the raw contents of
+ /// the symbol table embedded in the bitcode file. Clients which require a
+ /// symbol table should prefer to use irsymtab::read instead of this function
+ /// because it creates a reader for the irsymtab and handles upgrading bitcode
+ /// files without a symbol table or with an old symbol table.
+ Expected<BitcodeFileContents> getBitcodeFileContents(MemoryBufferRef Buffer);
+
+ /// Returns a list of modules in the specified bitcode buffer.
+ Expected<std::vector<BitcodeModule>>
+ getBitcodeModuleList(MemoryBufferRef Buffer);
+
+ /// Read the header of the specified bitcode buffer and prepare for lazy
+ /// deserialization of function bodies. If ShouldLazyLoadMetadata is true,
+ /// lazily load metadata as well. If IsImporting is true, this module is
+ /// being parsed for ThinLTO importing into another module.
+ Expected<std::unique_ptr<Module>>
+ getLazyBitcodeModule(MemoryBufferRef Buffer, LLVMContext &Context,
+ bool ShouldLazyLoadMetadata = false,
+ bool IsImporting = false);
+
+ /// Like getLazyBitcodeModule, except that the module takes ownership of
+ /// the memory buffer if successful. If successful, this moves Buffer. On
+ /// error, this *does not* move Buffer. If IsImporting is true, this module is
+ /// being parsed for ThinLTO importing into another module.
+ Expected<std::unique_ptr<Module>> getOwningLazyBitcodeModule(
+ std::unique_ptr<MemoryBuffer> &&Buffer, LLVMContext &Context,
+ bool ShouldLazyLoadMetadata = false, bool IsImporting = false);
+
+ /// Read the header of the specified bitcode buffer and extract just the
+ /// triple information. If successful, this returns a string. On error, this
+ /// returns "".
+ Expected<std::string> getBitcodeTargetTriple(MemoryBufferRef Buffer);
+
+ /// Return true if \p Buffer contains a bitcode file with ObjC code (category
+ /// or class) in it.
+ Expected<bool> isBitcodeContainingObjCCategory(MemoryBufferRef Buffer);
+
+ /// Read the header of the specified bitcode buffer and extract just the
+ /// producer string information. If successful, this returns a string. On
+ /// error, this returns "".
+ Expected<std::string> getBitcodeProducerString(MemoryBufferRef Buffer);
+
+ /// Read the specified bitcode file, returning the module.
+ Expected<std::unique_ptr<Module>> parseBitcodeFile(MemoryBufferRef Buffer,
+ LLVMContext &Context);
+
+ /// Returns LTO information for the specified bitcode file.
+ Expected<BitcodeLTOInfo> getBitcodeLTOInfo(MemoryBufferRef Buffer);
+
+ /// Parse the specified bitcode buffer, returning the module summary index.
+ Expected<std::unique_ptr<ModuleSummaryIndex>>
+ getModuleSummaryIndex(MemoryBufferRef Buffer);
+
+ /// Parse the specified bitcode buffer and merge the index into CombinedIndex.
+ Error readModuleSummaryIndex(MemoryBufferRef Buffer,
+ ModuleSummaryIndex &CombinedIndex,
+ uint64_t ModuleId);
+
+ /// Parse the module summary index out of an IR file and return the module
+ /// summary index object if found, or an empty summary if not. If Path refers
+ /// to an empty file and IgnoreEmptyThinLTOIndexFile is true, then
+ /// this function will return nullptr.
+ Expected<std::unique_ptr<ModuleSummaryIndex>>
+ getModuleSummaryIndexForFile(StringRef Path,
+ bool IgnoreEmptyThinLTOIndexFile = false);
+
+ /// isBitcodeWrapper - Return true if the given bytes are the magic bytes
+ /// for an LLVM IR bitcode wrapper.
+ inline bool isBitcodeWrapper(const unsigned char *BufPtr,
+ const unsigned char *BufEnd) {
+ // See if you can find the hidden message in the magic bytes :-).
+ // (Hint: it's a little-endian encoding.)
+ return BufPtr != BufEnd &&
+ BufPtr[0] == 0xDE &&
+ BufPtr[1] == 0xC0 &&
+ BufPtr[2] == 0x17 &&
+ BufPtr[3] == 0x0B;
+ }
+
+ /// isRawBitcode - Return true if the given bytes are the magic bytes for
+ /// raw LLVM IR bitcode (without a wrapper).
+ inline bool isRawBitcode(const unsigned char *BufPtr,
+ const unsigned char *BufEnd) {
+ // These bytes sort of have a hidden message, but it's not in
+ // little-endian this time, and it's a little redundant.
+ return BufPtr != BufEnd &&
+ BufPtr[0] == 'B' &&
+ BufPtr[1] == 'C' &&
+ BufPtr[2] == 0xc0 &&
+ BufPtr[3] == 0xde;
+ }
+
+ /// isBitcode - Return true if the given bytes are the magic bytes for
+ /// LLVM IR bitcode, either with or without a wrapper.
+ inline bool isBitcode(const unsigned char *BufPtr,
+ const unsigned char *BufEnd) {
+ return isBitcodeWrapper(BufPtr, BufEnd) ||
+ isRawBitcode(BufPtr, BufEnd);
+ }
+
+ /// SkipBitcodeWrapperHeader - Some systems wrap bc files with a special
+ /// header for padding or other reasons. The format of this header is:
+ ///
+ /// struct bc_header {
+ /// uint32_t Magic; // 0x0B17C0DE
+ /// uint32_t Version; // Version, currently always 0.
+ /// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
+ /// uint32_t BitcodeSize; // Size of traditional bitcode file.
+ /// ... potentially other gunk ...
+ /// };
+ ///
+ /// This function is called when we find a file with a matching magic number.
+ /// In this case, skip down to the subsection of the file that is actually a
+ /// BC file.
+ /// If 'VerifyBufferSize' is true, check that the buffer is large enough to
+ /// contain the whole bitcode file.
+ inline bool SkipBitcodeWrapperHeader(const unsigned char *&BufPtr,
+ const unsigned char *&BufEnd,
+ bool VerifyBufferSize) {
+ // Must contain the offset and size field!
+ if (unsigned(BufEnd - BufPtr) < BWH_SizeField + 4)
+ return true;
+
+ unsigned Offset = support::endian::read32le(&BufPtr[BWH_OffsetField]);
+ unsigned Size = support::endian::read32le(&BufPtr[BWH_SizeField]);
+ uint64_t BitcodeOffsetEnd = (uint64_t)Offset + (uint64_t)Size;
+
+ // Verify that Offset+Size fits in the file.
+ if (VerifyBufferSize && BitcodeOffsetEnd > uint64_t(BufEnd-BufPtr))
+ return true;
+ BufPtr += Offset;
+ BufEnd = BufPtr+Size;
+ return false;
+ }
+
+ const std::error_category &BitcodeErrorCategory();
+ enum class BitcodeError { CorruptedBitcode = 1 };
+ inline std::error_code make_error_code(BitcodeError E) {
+ return std::error_code(static_cast<int>(E), BitcodeErrorCategory());
+ }
+
+} // end namespace llvm
+
+namespace std {
+
+template <> struct is_error_code_enum<llvm::BitcodeError> : std::true_type {};
+
+} // end namespace std
+
+#endif // LLVM_BITCODE_BITCODEREADER_H