#ifndef LLVM_BITCODE_READERWRITER_H
#define LLVM_BITCODE_READERWRITER_H
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/FunctionInfo.h"
+#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <memory>
#include <string>
namespace llvm {
class BitstreamWriter;
- class MemoryBuffer;
class DataStreamer;
class LLVMContext;
class Module;
class raw_ostream;
/// Read the header of the specified bitcode buffer and prepare for lazy
- /// deserialization of function bodies. If successful, this takes ownership
- /// of 'buffer. On error, this *does not* take ownership of Buffer.
- ErrorOr<Module *> getLazyBitcodeModule(MemoryBuffer *Buffer,
- LLVMContext &Context);
-
- /// getStreamedBitcodeModule - Read the header of the specified stream
- /// and prepare for lazy deserialization and streaming of function bodies.
- /// On error, this returns null, and fills in *ErrMsg with an error
- /// description if ErrMsg is non-null.
- Module *getStreamedBitcodeModule(const std::string &name,
- DataStreamer *streamer,
- LLVMContext &Context,
- std::string *ErrMsg = 0);
-
- /// getBitcodeTargetTriple - Read the header of the specified bitcode
- /// buffer and extract just the triple information. If successful,
- /// this returns a string and *does not* take ownership
- /// of 'buffer'. On error, this returns "", and fills in *ErrMsg
- /// if ErrMsg is non-null.
- std::string getBitcodeTargetTriple(MemoryBuffer *Buffer,
- LLVMContext &Context,
- std::string *ErrMsg = 0);
-
- /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
- /// If an error occurs, this returns null and fills in *ErrMsg if it is
- /// non-null. This method *never* takes ownership of Buffer.
- Module *ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext &Context,
- std::string *ErrMsg = 0);
-
- /// WriteBitcodeToFile - Write the specified module to the specified
- /// raw output stream. For streams where it matters, the given stream
- /// should be in "binary" mode.
- void WriteBitcodeToFile(const Module *M, raw_ostream &Out);
-
+ /// deserialization of function bodies. If ShouldLazyLoadMetadata is true,
+ /// lazily load metadata as well. If successful, this moves Buffer. On
+ /// error, this *does not* move Buffer.
+ ErrorOr<std::unique_ptr<Module>>
+ getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &&Buffer,
+ LLVMContext &Context,
+ DiagnosticHandlerFunction DiagnosticHandler = nullptr,
+ bool ShouldLazyLoadMetadata = false);
+
+ /// Read the header of the specified stream and prepare for lazy
+ /// deserialization and streaming of function bodies.
+ ErrorOr<std::unique_ptr<Module>> getStreamedBitcodeModule(
+ StringRef Name, std::unique_ptr<DataStreamer> Streamer,
+ LLVMContext &Context,
+ DiagnosticHandlerFunction DiagnosticHandler = nullptr);
+
+ /// Read the header of the specified bitcode buffer and extract just the
+ /// triple information. If successful, this returns a string. On error, this
+ /// returns "".
+ std::string
+ getBitcodeTargetTriple(MemoryBufferRef Buffer, LLVMContext &Context,
+ DiagnosticHandlerFunction DiagnosticHandler = nullptr);
+
+ /// Read the specified bitcode file, returning the module.
+ ErrorOr<std::unique_ptr<Module>>
+ parseBitcodeFile(MemoryBufferRef Buffer, LLVMContext &Context,
+ DiagnosticHandlerFunction DiagnosticHandler = nullptr);
+
+ /// Check if the given bitcode buffer contains a function summary block.
+ bool hasFunctionSummary(MemoryBufferRef Buffer, LLVMContext &Context,
+ DiagnosticHandlerFunction DiagnosticHandler);
+
+ /// Parse the specified bitcode buffer, returning the function info index.
+ /// If ExportingModule is true, check for functions in the index from this
+ /// module when the combined index is built during parsing and set flag.
+ /// If IsLazy is true, parse the entire function summary into
+ /// the index. Otherwise skip the function summary section, and only create
+ /// an index object with a map from function name to function summary offset.
+ /// The index is used to perform lazy function summary reading later.
+ ErrorOr<std::unique_ptr<FunctionInfoIndex>>
+ getFunctionInfoIndex(MemoryBufferRef Buffer, LLVMContext &Context,
+ DiagnosticHandlerFunction DiagnosticHandler,
+ const Module *ExportingModule = nullptr,
+ bool IsLazy = false);
+
+ /// This method supports lazy reading of function summary data from the
+ /// combined index during function importing. When reading the combined index
+ /// file, getFunctionInfoIndex is first invoked with IsLazy=true.
+ /// Then this method is called for each function considered for importing,
+ /// to parse the summary information for the given function name into
+ /// the index.
+ std::error_code
+ readFunctionSummary(MemoryBufferRef Buffer, LLVMContext &Context,
+ DiagnosticHandlerFunction DiagnosticHandler,
+ StringRef FunctionName,
+ std::unique_ptr<FunctionInfoIndex> Index);
+
+ /// \brief Write the specified module to the specified raw output stream.
+ ///
+ /// For streams where it matters, the given stream should be in "binary"
+ /// mode.
+ ///
+ /// If \c ShouldPreserveUseListOrder, encode the use-list order for each \a
+ /// Value in \c M. These will be reconstructed exactly when \a M is
+ /// deserialized.
+ ///
+ /// If \c EmitFunctionSummary, emit the function summary index (currently
+ /// for use in ThinLTO optimization).
+ void WriteBitcodeToFile(const Module *M, raw_ostream &Out,
+ bool ShouldPreserveUseListOrder = false,
+ bool EmitFunctionSummary = false);
+
+ /// Write the specified function summary index to the given raw output stream,
+ /// where it will be written in a new bitcode block. This is used when
+ /// writing the combined index file for ThinLTO.
+ void WriteFunctionSummaryToFile(const FunctionInfoIndex &Index,
+ raw_ostream &Out);
/// isBitcodeWrapper - Return true if the given bytes are the magic bytes
/// for an LLVM IR bitcode wrapper.
// Must contain the header!
if (BufEnd-BufPtr < KnownHeaderSize) return true;
- unsigned Offset = ( BufPtr[OffsetField ] |
- (BufPtr[OffsetField+1] << 8) |
- (BufPtr[OffsetField+2] << 16) |
- (BufPtr[OffsetField+3] << 24));
- unsigned Size = ( BufPtr[SizeField ] |
- (BufPtr[SizeField +1] << 8) |
- (BufPtr[SizeField +2] << 16) |
- (BufPtr[SizeField +3] << 24));
+ unsigned Offset = support::endian::read32le(&BufPtr[OffsetField]);
+ unsigned Size = support::endian::read32le(&BufPtr[SizeField]);
// Verify that Offset+Size fits in the file.
if (VerifyBufferSize && Offset+Size > unsigned(BufEnd-BufPtr))
BufEnd = BufPtr+Size;
return false;
}
+
+ const std::error_category &BitcodeErrorCategory();
+ enum class BitcodeError { InvalidBitcodeSignature = 1, CorruptedBitcode };
+ inline std::error_code make_error_code(BitcodeError E) {
+ return std::error_code(static_cast<int>(E), BitcodeErrorCategory());
+ }
+
+ class BitcodeDiagnosticInfo : public DiagnosticInfo {
+ const Twine &Msg;
+ std::error_code EC;
+
+ public:
+ BitcodeDiagnosticInfo(std::error_code EC, DiagnosticSeverity Severity,
+ const Twine &Msg);
+ void print(DiagnosticPrinter &DP) const override;
+ std::error_code getError() const { return EC; }
+
+ static bool classof(const DiagnosticInfo *DI) {
+ return DI->getKind() == DK_Bitcode;
+ }
+ };
+
} // End llvm namespace
+namespace std {
+template <> struct is_error_code_enum<llvm::BitcodeError> : std::true_type {};
+}
+
#endif
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