//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_BITCODE_H
-#define LLVM_BITCODE_H
+#ifndef LLVM_BITCODE_READERWRITER_H
+#define LLVM_BITCODE_READERWRITER_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 ModulePass;
class raw_ostream;
- /// getLazyBitcodeModule - Read the header of the specified bitcode buffer
- /// and prepare for lazy deserialization of function bodies. If successful,
- /// this takes ownership of 'buffer' and returns a non-null pointer. On
- /// error, this returns null, *does not* take ownership of Buffer, and fills
- /// in *ErrMsg with an error description if ErrMsg is non-null.
- Module *getLazyBitcodeModule(MemoryBuffer *Buffer,
- LLVMContext &Context,
- std::string *ErrMsg = 0);
+ /// Read the header of the specified bitcode buffer and prepare for lazy
+ /// deserialization of function bodies. If successful, this moves Buffer. On
+ /// error, this *does not* move Buffer.
+ ErrorOr<Module *> getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &&Buffer,
+ LLVMContext &Context);
/// getStreamedBitcodeModule - Read the header of the specified stream
/// and prepare for lazy deserialization and streaming of function bodies.
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);
+ std::string *ErrMsg = 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);
+
+ /// Read the specified bitcode file, returning the module.
+ ErrorOr<Module *> parseBitcodeFile(MemoryBufferRef Buffer,
+ LLVMContext &Context);
/// 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);
- /// createBitcodeWriterPass - Create and return a pass that writes the module
- /// to the specified ostream.
- ModulePass *createBitcodeWriterPass(raw_ostream &Str);
-
/// isBitcodeWrapper - Return true if the given bytes are the magic bytes
/// for an LLVM IR bitcode wrapper.
///
- static inline bool isBitcodeWrapper(const unsigned char *BufPtr,
- const unsigned char *BufEnd) {
+ 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 &&
/// isRawBitcode - Return true if the given bytes are the magic bytes for
/// raw LLVM IR bitcode (without a wrapper).
///
- static inline bool isRawBitcode(const unsigned char *BufPtr,
- const unsigned char *BufEnd) {
+ 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 &&
/// isBitcode - Return true if the given bytes are the magic bytes for
/// LLVM IR bitcode, either with or without a wrapper.
///
- static bool inline isBitcode(const unsigned char *BufPtr,
- const unsigned char *BufEnd) {
+ inline bool isBitcode(const unsigned char *BufPtr,
+ const unsigned char *BufEnd) {
return isBitcodeWrapper(BufPtr, BufEnd) ||
isRawBitcode(BufPtr, BufEnd);
}
/// BC file.
/// If 'VerifyBufferSize' is true, check that the buffer is large enough to
/// contain the whole bitcode file.
- static inline bool SkipBitcodeWrapperHeader(const unsigned char *&BufPtr,
- const unsigned char *&BufEnd,
- bool VerifyBufferSize) {
+ inline bool SkipBitcodeWrapperHeader(const unsigned char *&BufPtr,
+ const unsigned char *&BufEnd,
+ bool VerifyBufferSize) {
enum {
KnownHeaderSize = 4*4, // Size of header we read.
OffsetField = 2*4, // Offset in bytes to Offset field.
BufEnd = BufPtr+Size;
return false;
}
+
+ const std::error_category &BitcodeErrorCategory();
+ enum class BitcodeError {
+ ConflictingMETADATA_KINDRecords,
+ CouldNotFindFunctionInStream,
+ ExpectedConstant,
+ InsufficientFunctionProtos,
+ InvalidBitcodeSignature,
+ InvalidBitcodeWrapperHeader,
+ InvalidConstantReference,
+ InvalidID, // A read identifier is not found in the table it should be in.
+ InvalidInstructionWithNoBB,
+ InvalidRecord, // A read record doesn't have the expected size or structure
+ InvalidTypeForValue, // Type read OK, but is invalid for its use
+ InvalidTYPETable,
+ InvalidType, // We were unable to read a type
+ MalformedBlock, // We are unable to advance in the stream.
+ MalformedGlobalInitializerSet,
+ InvalidMultipleBlocks, // We found multiple blocks of a kind that should
+ // have only one
+ NeverResolvedValueFoundInFunction,
+ NeverResolvedFunctionFromBlockAddress,
+ InvalidValue // Invalid version, inst number, attr number, etc
+ };
+ inline std::error_code make_error_code(BitcodeError E) {
+ return std::error_code(static_cast<int>(E), BitcodeErrorCategory());
+ }
+
} // End llvm namespace
+namespace std {
+template <> struct is_error_code_enum<llvm::BitcodeError> : std::true_type {};
+}
+
#endif
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