1 files changed, 0 insertions, 980 deletions

diff --git a/contrib/llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp b/contrib/llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp
deleted file mode 100644
index 9c30d563a314..000000000000
--- a/contrib/llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp
+++ /dev/null
@@ -1,980 +0,0 @@
-//===- BitcodeAnalyzer.cpp - Internal BitcodeAnalyzer implementation ------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Bitcode/BitcodeAnalyzer.h"
-#include "llvm/Bitcode/BitcodeReader.h"
-#include "llvm/Bitcode/LLVMBitCodes.h"
-#include "llvm/Bitstream/BitCodes.h"
-#include "llvm/Bitstream/BitstreamReader.h"
-#include "llvm/Support/Format.h"
-#include "llvm/Support/SHA1.h"
-
-using namespace llvm;
-
-static Error reportError(StringRef Message) {
-  return createStringError(std::errc::illegal_byte_sequence, Message.data());
-}
-
-/// Return a symbolic block name if known, otherwise return null.
-static Optional<const char *> GetBlockName(unsigned BlockID,
-                                           const BitstreamBlockInfo &BlockInfo,
-                                           CurStreamTypeType CurStreamType) {
-  // Standard blocks for all bitcode files.
-  if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
-    if (BlockID == bitc::BLOCKINFO_BLOCK_ID)
-      return "BLOCKINFO_BLOCK";
-    return None;
-  }
-
-  // Check to see if we have a blockinfo record for this block, with a name.
-  if (const BitstreamBlockInfo::BlockInfo *Info =
-          BlockInfo.getBlockInfo(BlockID)) {
-    if (!Info->Name.empty())
-      return Info->Name.c_str();
-  }
-
-  if (CurStreamType != LLVMIRBitstream)
-    return None;
-
-  switch (BlockID) {
-  default:
-    return None;
-  case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
-    return "OPERAND_BUNDLE_TAGS_BLOCK";
-  case bitc::MODULE_BLOCK_ID:
-    return "MODULE_BLOCK";
-  case bitc::PARAMATTR_BLOCK_ID:
-    return "PARAMATTR_BLOCK";
-  case bitc::PARAMATTR_GROUP_BLOCK_ID:
-    return "PARAMATTR_GROUP_BLOCK_ID";
-  case bitc::TYPE_BLOCK_ID_NEW:
-    return "TYPE_BLOCK_ID";
-  case bitc::CONSTANTS_BLOCK_ID:
-    return "CONSTANTS_BLOCK";
-  case bitc::FUNCTION_BLOCK_ID:
-    return "FUNCTION_BLOCK";
-  case bitc::IDENTIFICATION_BLOCK_ID:
-    return "IDENTIFICATION_BLOCK_ID";
-  case bitc::VALUE_SYMTAB_BLOCK_ID:
-    return "VALUE_SYMTAB";
-  case bitc::METADATA_BLOCK_ID:
-    return "METADATA_BLOCK";
-  case bitc::METADATA_KIND_BLOCK_ID:
-    return "METADATA_KIND_BLOCK";
-  case bitc::METADATA_ATTACHMENT_ID:
-    return "METADATA_ATTACHMENT_BLOCK";
-  case bitc::USELIST_BLOCK_ID:
-    return "USELIST_BLOCK_ID";
-  case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
-    return "GLOBALVAL_SUMMARY_BLOCK";
-  case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
-    return "FULL_LTO_GLOBALVAL_SUMMARY_BLOCK";
-  case bitc::MODULE_STRTAB_BLOCK_ID:
-    return "MODULE_STRTAB_BLOCK";
-  case bitc::STRTAB_BLOCK_ID:
-    return "STRTAB_BLOCK";
-  case bitc::SYMTAB_BLOCK_ID:
-    return "SYMTAB_BLOCK";
-  }
-}
-
-/// Return a symbolic code name if known, otherwise return null.
-static Optional<const char *> GetCodeName(unsigned CodeID, unsigned BlockID,
-                                          const BitstreamBlockInfo &BlockInfo,
-                                          CurStreamTypeType CurStreamType) {
-  // Standard blocks for all bitcode files.
-  if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
-    if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
-      switch (CodeID) {
-      default:
-        return None;
-      case bitc::BLOCKINFO_CODE_SETBID:
-        return "SETBID";
-      case bitc::BLOCKINFO_CODE_BLOCKNAME:
-        return "BLOCKNAME";
-      case bitc::BLOCKINFO_CODE_SETRECORDNAME:
-        return "SETRECORDNAME";
-      }
-    }
-    return None;
-  }
-
-  // Check to see if we have a blockinfo record for this record, with a name.
-  if (const BitstreamBlockInfo::BlockInfo *Info =
-          BlockInfo.getBlockInfo(BlockID)) {
-    for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
-      if (Info->RecordNames[i].first == CodeID)
-        return Info->RecordNames[i].second.c_str();
-  }
-
-  if (CurStreamType != LLVMIRBitstream)
-    return None;
-
-#define STRINGIFY_CODE(PREFIX, CODE)                                           \
-  case bitc::PREFIX##_##CODE:                                                  \
-    return #CODE;
-  switch (BlockID) {
-  default:
-    return None;
-  case bitc::MODULE_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(MODULE_CODE, VERSION)
-      STRINGIFY_CODE(MODULE_CODE, TRIPLE)
-      STRINGIFY_CODE(MODULE_CODE, DATALAYOUT)
-      STRINGIFY_CODE(MODULE_CODE, ASM)
-      STRINGIFY_CODE(MODULE_CODE, SECTIONNAME)
-      STRINGIFY_CODE(MODULE_CODE, DEPLIB) // FIXME: Remove in 4.0
-      STRINGIFY_CODE(MODULE_CODE, GLOBALVAR)
-      STRINGIFY_CODE(MODULE_CODE, FUNCTION)
-      STRINGIFY_CODE(MODULE_CODE, ALIAS)
-      STRINGIFY_CODE(MODULE_CODE, GCNAME)
-      STRINGIFY_CODE(MODULE_CODE, VSTOFFSET)
-      STRINGIFY_CODE(MODULE_CODE, METADATA_VALUES_UNUSED)
-      STRINGIFY_CODE(MODULE_CODE, SOURCE_FILENAME)
-      STRINGIFY_CODE(MODULE_CODE, HASH)
-    }
-  case bitc::IDENTIFICATION_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(IDENTIFICATION_CODE, STRING)
-      STRINGIFY_CODE(IDENTIFICATION_CODE, EPOCH)
-    }
-  case bitc::PARAMATTR_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-    // FIXME: Should these be different?
-    case bitc::PARAMATTR_CODE_ENTRY_OLD:
-      return "ENTRY";
-    case bitc::PARAMATTR_CODE_ENTRY:
-      return "ENTRY";
-    }
-  case bitc::PARAMATTR_GROUP_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-    case bitc::PARAMATTR_GRP_CODE_ENTRY:
-      return "ENTRY";
-    }
-  case bitc::TYPE_BLOCK_ID_NEW:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(TYPE_CODE, NUMENTRY)
-      STRINGIFY_CODE(TYPE_CODE, VOID)
-      STRINGIFY_CODE(TYPE_CODE, FLOAT)
-      STRINGIFY_CODE(TYPE_CODE, DOUBLE)
-      STRINGIFY_CODE(TYPE_CODE, LABEL)
-      STRINGIFY_CODE(TYPE_CODE, OPAQUE)
-      STRINGIFY_CODE(TYPE_CODE, INTEGER)
-      STRINGIFY_CODE(TYPE_CODE, POINTER)
-      STRINGIFY_CODE(TYPE_CODE, ARRAY)
-      STRINGIFY_CODE(TYPE_CODE, VECTOR)
-      STRINGIFY_CODE(TYPE_CODE, X86_FP80)
-      STRINGIFY_CODE(TYPE_CODE, FP128)
-      STRINGIFY_CODE(TYPE_CODE, PPC_FP128)
-      STRINGIFY_CODE(TYPE_CODE, METADATA)
-      STRINGIFY_CODE(TYPE_CODE, STRUCT_ANON)
-      STRINGIFY_CODE(TYPE_CODE, STRUCT_NAME)
-      STRINGIFY_CODE(TYPE_CODE, STRUCT_NAMED)
-      STRINGIFY_CODE(TYPE_CODE, FUNCTION)
-    }
-
-  case bitc::CONSTANTS_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(CST_CODE, SETTYPE)
-      STRINGIFY_CODE(CST_CODE, NULL)
-      STRINGIFY_CODE(CST_CODE, UNDEF)
-      STRINGIFY_CODE(CST_CODE, INTEGER)
-      STRINGIFY_CODE(CST_CODE, WIDE_INTEGER)
-      STRINGIFY_CODE(CST_CODE, FLOAT)
-      STRINGIFY_CODE(CST_CODE, AGGREGATE)
-      STRINGIFY_CODE(CST_CODE, STRING)
-      STRINGIFY_CODE(CST_CODE, CSTRING)
-      STRINGIFY_CODE(CST_CODE, CE_BINOP)
-      STRINGIFY_CODE(CST_CODE, CE_CAST)
-      STRINGIFY_CODE(CST_CODE, CE_GEP)
-      STRINGIFY_CODE(CST_CODE, CE_INBOUNDS_GEP)
-      STRINGIFY_CODE(CST_CODE, CE_SELECT)
-      STRINGIFY_CODE(CST_CODE, CE_EXTRACTELT)
-      STRINGIFY_CODE(CST_CODE, CE_INSERTELT)
-      STRINGIFY_CODE(CST_CODE, CE_SHUFFLEVEC)
-      STRINGIFY_CODE(CST_CODE, CE_CMP)
-      STRINGIFY_CODE(CST_CODE, INLINEASM)
-      STRINGIFY_CODE(CST_CODE, CE_SHUFVEC_EX)
-      STRINGIFY_CODE(CST_CODE, CE_UNOP)
-    case bitc::CST_CODE_BLOCKADDRESS:
-      return "CST_CODE_BLOCKADDRESS";
-      STRINGIFY_CODE(CST_CODE, DATA)
-    }
-  case bitc::FUNCTION_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(FUNC_CODE, DECLAREBLOCKS)
-      STRINGIFY_CODE(FUNC_CODE, INST_BINOP)
-      STRINGIFY_CODE(FUNC_CODE, INST_CAST)
-      STRINGIFY_CODE(FUNC_CODE, INST_GEP_OLD)
-      STRINGIFY_CODE(FUNC_CODE, INST_INBOUNDS_GEP_OLD)
-      STRINGIFY_CODE(FUNC_CODE, INST_SELECT)
-      STRINGIFY_CODE(FUNC_CODE, INST_EXTRACTELT)
-      STRINGIFY_CODE(FUNC_CODE, INST_INSERTELT)
-      STRINGIFY_CODE(FUNC_CODE, INST_SHUFFLEVEC)
-      STRINGIFY_CODE(FUNC_CODE, INST_CMP)
-      STRINGIFY_CODE(FUNC_CODE, INST_RET)
-      STRINGIFY_CODE(FUNC_CODE, INST_BR)
-      STRINGIFY_CODE(FUNC_CODE, INST_SWITCH)
-      STRINGIFY_CODE(FUNC_CODE, INST_INVOKE)
-      STRINGIFY_CODE(FUNC_CODE, INST_UNOP)
-      STRINGIFY_CODE(FUNC_CODE, INST_UNREACHABLE)
-      STRINGIFY_CODE(FUNC_CODE, INST_CLEANUPRET)
-      STRINGIFY_CODE(FUNC_CODE, INST_CATCHRET)
-      STRINGIFY_CODE(FUNC_CODE, INST_CATCHPAD)
-      STRINGIFY_CODE(FUNC_CODE, INST_PHI)
-      STRINGIFY_CODE(FUNC_CODE, INST_ALLOCA)
-      STRINGIFY_CODE(FUNC_CODE, INST_LOAD)
-      STRINGIFY_CODE(FUNC_CODE, INST_VAARG)
-      STRINGIFY_CODE(FUNC_CODE, INST_STORE)
-      STRINGIFY_CODE(FUNC_CODE, INST_EXTRACTVAL)
-      STRINGIFY_CODE(FUNC_CODE, INST_INSERTVAL)
-      STRINGIFY_CODE(FUNC_CODE, INST_CMP2)
-      STRINGIFY_CODE(FUNC_CODE, INST_VSELECT)
-      STRINGIFY_CODE(FUNC_CODE, DEBUG_LOC_AGAIN)
-      STRINGIFY_CODE(FUNC_CODE, INST_CALL)
-      STRINGIFY_CODE(FUNC_CODE, DEBUG_LOC)
-      STRINGIFY_CODE(FUNC_CODE, INST_GEP)
-      STRINGIFY_CODE(FUNC_CODE, OPERAND_BUNDLE)
-      STRINGIFY_CODE(FUNC_CODE, INST_FENCE)
-      STRINGIFY_CODE(FUNC_CODE, INST_ATOMICRMW)
-      STRINGIFY_CODE(FUNC_CODE, INST_LOADATOMIC)
-      STRINGIFY_CODE(FUNC_CODE, INST_STOREATOMIC)
-      STRINGIFY_CODE(FUNC_CODE, INST_CMPXCHG)
-      STRINGIFY_CODE(FUNC_CODE, INST_CALLBR)
-    }
-  case bitc::VALUE_SYMTAB_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(VST_CODE, ENTRY)
-      STRINGIFY_CODE(VST_CODE, BBENTRY)
-      STRINGIFY_CODE(VST_CODE, FNENTRY)
-      STRINGIFY_CODE(VST_CODE, COMBINED_ENTRY)
-    }
-  case bitc::MODULE_STRTAB_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(MST_CODE, ENTRY)
-      STRINGIFY_CODE(MST_CODE, HASH)
-    }
-  case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
-  case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(FS, PERMODULE)
-      STRINGIFY_CODE(FS, PERMODULE_PROFILE)
-      STRINGIFY_CODE(FS, PERMODULE_RELBF)
-      STRINGIFY_CODE(FS, PERMODULE_GLOBALVAR_INIT_REFS)
-      STRINGIFY_CODE(FS, PERMODULE_VTABLE_GLOBALVAR_INIT_REFS)
-      STRINGIFY_CODE(FS, COMBINED)
-      STRINGIFY_CODE(FS, COMBINED_PROFILE)
-      STRINGIFY_CODE(FS, COMBINED_GLOBALVAR_INIT_REFS)
-      STRINGIFY_CODE(FS, ALIAS)
-      STRINGIFY_CODE(FS, COMBINED_ALIAS)
-      STRINGIFY_CODE(FS, COMBINED_ORIGINAL_NAME)
-      STRINGIFY_CODE(FS, VERSION)
-      STRINGIFY_CODE(FS, FLAGS)
-      STRINGIFY_CODE(FS, TYPE_TESTS)
-      STRINGIFY_CODE(FS, TYPE_TEST_ASSUME_VCALLS)
-      STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_VCALLS)
-      STRINGIFY_CODE(FS, TYPE_TEST_ASSUME_CONST_VCALL)
-      STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_CONST_VCALL)
-      STRINGIFY_CODE(FS, VALUE_GUID)
-      STRINGIFY_CODE(FS, CFI_FUNCTION_DEFS)
-      STRINGIFY_CODE(FS, CFI_FUNCTION_DECLS)
-      STRINGIFY_CODE(FS, TYPE_ID)
-      STRINGIFY_CODE(FS, TYPE_ID_METADATA)
-    }
-  case bitc::METADATA_ATTACHMENT_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(METADATA, ATTACHMENT)
-    }
-  case bitc::METADATA_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(METADATA, STRING_OLD)
-      STRINGIFY_CODE(METADATA, VALUE)
-      STRINGIFY_CODE(METADATA, NODE)
-      STRINGIFY_CODE(METADATA, NAME)
-      STRINGIFY_CODE(METADATA, DISTINCT_NODE)
-      STRINGIFY_CODE(METADATA, KIND) // Older bitcode has it in a MODULE_BLOCK
-      STRINGIFY_CODE(METADATA, LOCATION)
-      STRINGIFY_CODE(METADATA, OLD_NODE)
-      STRINGIFY_CODE(METADATA, OLD_FN_NODE)
-      STRINGIFY_CODE(METADATA, NAMED_NODE)
-      STRINGIFY_CODE(METADATA, GENERIC_DEBUG)
-      STRINGIFY_CODE(METADATA, SUBRANGE)
-      STRINGIFY_CODE(METADATA, ENUMERATOR)
-      STRINGIFY_CODE(METADATA, BASIC_TYPE)
-      STRINGIFY_CODE(METADATA, FILE)
-      STRINGIFY_CODE(METADATA, DERIVED_TYPE)
-      STRINGIFY_CODE(METADATA, COMPOSITE_TYPE)
-      STRINGIFY_CODE(METADATA, SUBROUTINE_TYPE)
-      STRINGIFY_CODE(METADATA, COMPILE_UNIT)
-      STRINGIFY_CODE(METADATA, SUBPROGRAM)
-      STRINGIFY_CODE(METADATA, LEXICAL_BLOCK)
-      STRINGIFY_CODE(METADATA, LEXICAL_BLOCK_FILE)
-      STRINGIFY_CODE(METADATA, NAMESPACE)
-      STRINGIFY_CODE(METADATA, TEMPLATE_TYPE)
-      STRINGIFY_CODE(METADATA, TEMPLATE_VALUE)
-      STRINGIFY_CODE(METADATA, GLOBAL_VAR)
-      STRINGIFY_CODE(METADATA, LOCAL_VAR)
-      STRINGIFY_CODE(METADATA, EXPRESSION)
-      STRINGIFY_CODE(METADATA, OBJC_PROPERTY)
-      STRINGIFY_CODE(METADATA, IMPORTED_ENTITY)
-      STRINGIFY_CODE(METADATA, MODULE)
-      STRINGIFY_CODE(METADATA, MACRO)
-      STRINGIFY_CODE(METADATA, MACRO_FILE)
-      STRINGIFY_CODE(METADATA, STRINGS)
-      STRINGIFY_CODE(METADATA, GLOBAL_DECL_ATTACHMENT)
-      STRINGIFY_CODE(METADATA, GLOBAL_VAR_EXPR)
-      STRINGIFY_CODE(METADATA, INDEX_OFFSET)
-      STRINGIFY_CODE(METADATA, INDEX)
-    }
-  case bitc::METADATA_KIND_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-      STRINGIFY_CODE(METADATA, KIND)
-    }
-  case bitc::USELIST_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-    case bitc::USELIST_CODE_DEFAULT:
-      return "USELIST_CODE_DEFAULT";
-    case bitc::USELIST_CODE_BB:
-      return "USELIST_CODE_BB";
-    }
-
-  case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-    case bitc::OPERAND_BUNDLE_TAG:
-      return "OPERAND_BUNDLE_TAG";
-    }
-  case bitc::STRTAB_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-    case bitc::STRTAB_BLOB:
-      return "BLOB";
-    }
-  case bitc::SYMTAB_BLOCK_ID:
-    switch (CodeID) {
-    default:
-      return None;
-    case bitc::SYMTAB_BLOB:
-      return "BLOB";
-    }
-  }
-#undef STRINGIFY_CODE
-}
-
-static void printSize(raw_ostream &OS, double Bits) {
-  OS << format("%.2f/%.2fB/%luW", Bits, Bits / 8, (unsigned long)(Bits / 32));
-}
-static void printSize(raw_ostream &OS, uint64_t Bits) {
-  OS << format("%lub/%.2fB/%luW", (unsigned long)Bits, (double)Bits / 8,
-               (unsigned long)(Bits / 32));
-}
-
-static Expected<CurStreamTypeType> ReadSignature(BitstreamCursor &Stream) {
-  auto tryRead = [&Stream](char &Dest, size_t size) -> Error {
-    if (Expected<SimpleBitstreamCursor::word_t> MaybeWord = Stream.Read(size))
-      Dest = MaybeWord.get();
-    else
-      return MaybeWord.takeError();
-    return Error::success();
-  };
-
-  char Signature[6];
-  if (Error Err = tryRead(Signature[0], 8))
-    return std::move(Err);
-  if (Error Err = tryRead(Signature[1], 8))
-    return std::move(Err);
-
-  // Autodetect the file contents, if it is one we know.
-  if (Signature[0] == 'C' && Signature[1] == 'P') {
-    if (Error Err = tryRead(Signature[2], 8))
-      return std::move(Err);
-    if (Error Err = tryRead(Signature[3], 8))
-      return std::move(Err);
-    if (Signature[2] == 'C' && Signature[3] == 'H')
-      return ClangSerializedASTBitstream;
-  } else if (Signature[0] == 'D' && Signature[1] == 'I') {
-    if (Error Err = tryRead(Signature[2], 8))
-      return std::move(Err);
-    if (Error Err = tryRead(Signature[3], 8))
-      return std::move(Err);
-    if (Signature[2] == 'A' && Signature[3] == 'G')
-      return ClangSerializedDiagnosticsBitstream;
-  } else {
-    if (Error Err = tryRead(Signature[2], 4))
-      return std::move(Err);
-    if (Error Err = tryRead(Signature[3], 4))
-      return std::move(Err);
-    if (Error Err = tryRead(Signature[4], 4))
-      return std::move(Err);
-    if (Error Err = tryRead(Signature[5], 4))
-      return std::move(Err);
-    if (Signature[0] == 'B' && Signature[1] == 'C' && Signature[2] == 0x0 &&
-        Signature[3] == 0xC && Signature[4] == 0xE && Signature[5] == 0xD)
-      return LLVMIRBitstream;
-  }
-  return UnknownBitstream;
-}
-
-static Expected<CurStreamTypeType> analyzeHeader(Optional<BCDumpOptions> O,
-                                                 BitstreamCursor &Stream) {
-  ArrayRef<uint8_t> Bytes = Stream.getBitcodeBytes();
-  const unsigned char *BufPtr = (const unsigned char *)Bytes.data();
-  const unsigned char *EndBufPtr = BufPtr + Bytes.size();
-
-  // If we have a wrapper header, parse it and ignore the non-bc file
-  // contents. The magic number is 0x0B17C0DE stored in little endian.
-  if (isBitcodeWrapper(BufPtr, EndBufPtr)) {
-    if (Bytes.size() < BWH_HeaderSize)
-      return reportError("Invalid bitcode wrapper header");
-
-    if (O) {
-      unsigned Magic = support::endian::read32le(&BufPtr[BWH_MagicField]);
-      unsigned Version = support::endian::read32le(&BufPtr[BWH_VersionField]);
-      unsigned Offset = support::endian::read32le(&BufPtr[BWH_OffsetField]);
-      unsigned Size = support::endian::read32le(&BufPtr[BWH_SizeField]);
-      unsigned CPUType = support::endian::read32le(&BufPtr[BWH_CPUTypeField]);
-
-      O->OS << "<BITCODE_WRAPPER_HEADER"
-            << " Magic=" << format_hex(Magic, 10)
-            << " Version=" << format_hex(Version, 10)
-            << " Offset=" << format_hex(Offset, 10)
-            << " Size=" << format_hex(Size, 10)
-            << " CPUType=" << format_hex(CPUType, 10) << "/>\n";
-    }
-
-    if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true))
-      return reportError("Invalid bitcode wrapper header");
-  }
-
-  // Use the cursor modified by skipping the wrapper header.
-  Stream = BitstreamCursor(ArrayRef<uint8_t>(BufPtr, EndBufPtr));
-
-  return ReadSignature(Stream);
-}
-
-static bool canDecodeBlob(unsigned Code, unsigned BlockID) {
-  return BlockID == bitc::METADATA_BLOCK_ID && Code == bitc::METADATA_STRINGS;
-}
-
-Error BitcodeAnalyzer::decodeMetadataStringsBlob(StringRef Indent,
-                                                 ArrayRef<uint64_t> Record,
-                                                 StringRef Blob,
-                                                 raw_ostream &OS) {
-  if (Blob.empty())
-    return reportError("Cannot decode empty blob.");
-
-  if (Record.size() != 2)
-    return reportError(
-        "Decoding metadata strings blob needs two record entries.");
-
-  unsigned NumStrings = Record[0];
-  unsigned StringsOffset = Record[1];
-  OS << " num-strings = " << NumStrings << " {\n";
-
-  StringRef Lengths = Blob.slice(0, StringsOffset);
-  SimpleBitstreamCursor R(Lengths);
-  StringRef Strings = Blob.drop_front(StringsOffset);
-  do {
-    if (R.AtEndOfStream())
-      return reportError("bad length");
-
-    Expected<uint32_t> MaybeSize = R.ReadVBR(6);
-    if (!MaybeSize)
-      return MaybeSize.takeError();
-    uint32_t Size = MaybeSize.get();
-    if (Strings.size() < Size)
-      return reportError("truncated chars");
-
-    OS << Indent << "    '";
-    OS.write_escaped(Strings.slice(0, Size), /*hex=*/true);
-    OS << "'\n";
-    Strings = Strings.drop_front(Size);
-  } while (--NumStrings);
-
-  OS << Indent << "  }";
-  return Error::success();
-}
-
-BitcodeAnalyzer::BitcodeAnalyzer(StringRef Buffer,
-                                 Optional<StringRef> BlockInfoBuffer)
-    : Stream(Buffer) {
-  if (BlockInfoBuffer)
-    BlockInfoStream.emplace(*BlockInfoBuffer);
-}
-
-Error BitcodeAnalyzer::analyze(Optional<BCDumpOptions> O,
-                               Optional<StringRef> CheckHash) {
-  Expected<CurStreamTypeType> MaybeType = analyzeHeader(O, Stream);
-  if (!MaybeType)
-    return MaybeType.takeError();
-  else
-    CurStreamType = *MaybeType;
-
-  Stream.setBlockInfo(&BlockInfo);
-
-  // Read block info from BlockInfoStream, if specified.
-  // The block info must be a top-level block.
-  if (BlockInfoStream) {
-    BitstreamCursor BlockInfoCursor(*BlockInfoStream);
-    Expected<CurStreamTypeType> H = analyzeHeader(O, BlockInfoCursor);
-    if (!H)
-      return H.takeError();
-
-    while (!BlockInfoCursor.AtEndOfStream()) {
-      Expected<unsigned> MaybeCode = BlockInfoCursor.ReadCode();
-      if (!MaybeCode)
-        return MaybeCode.takeError();
-      if (MaybeCode.get() != bitc::ENTER_SUBBLOCK)
-        return reportError("Invalid record at top-level in block info file");
-
-      Expected<unsigned> MaybeBlockID = BlockInfoCursor.ReadSubBlockID();
-      if (!MaybeBlockID)
-        return MaybeBlockID.takeError();
-      if (MaybeBlockID.get() == bitc::BLOCKINFO_BLOCK_ID) {
-        Expected<Optional<BitstreamBlockInfo>> MaybeNewBlockInfo =
-            BlockInfoCursor.ReadBlockInfoBlock(/*ReadBlockInfoNames=*/true);
-        if (!MaybeNewBlockInfo)
-          return MaybeNewBlockInfo.takeError();
-        Optional<BitstreamBlockInfo> NewBlockInfo =
-            std::move(MaybeNewBlockInfo.get());
-        if (!NewBlockInfo)
-          return reportError("Malformed BlockInfoBlock in block info file");
-        BlockInfo = std::move(*NewBlockInfo);
-        break;
-      }
-
-      if (Error Err = BlockInfoCursor.SkipBlock())
-        return Err;
-    }
-  }
-
-  // Parse the top-level structure.  We only allow blocks at the top-level.
-  while (!Stream.AtEndOfStream()) {
-    Expected<unsigned> MaybeCode = Stream.ReadCode();
-    if (!MaybeCode)
-      return MaybeCode.takeError();
-    if (MaybeCode.get() != bitc::ENTER_SUBBLOCK)
-      return reportError("Invalid record at top-level");
-
-    Expected<unsigned> MaybeBlockID = Stream.ReadSubBlockID();
-    if (!MaybeBlockID)
-      return MaybeBlockID.takeError();
-
-    if (Error E = parseBlock(MaybeBlockID.get(), 0, O, CheckHash))
-      return E;
-    ++NumTopBlocks;
-  }
-
-  return Error::success();
-}
-
-void BitcodeAnalyzer::printStats(BCDumpOptions O,
-                                 Optional<StringRef> Filename) {
-  uint64_t BufferSizeBits = Stream.getBitcodeBytes().size() * CHAR_BIT;
-  // Print a summary of the read file.
-  O.OS << "Summary ";
-  if (Filename)
-    O.OS << "of " << Filename->data() << ":\n";
-  O.OS << "         Total size: ";
-  printSize(O.OS, BufferSizeBits);
-  O.OS << "\n";
-  O.OS << "        Stream type: ";
-  switch (CurStreamType) {
-  case UnknownBitstream:
-    O.OS << "unknown\n";
-    break;
-  case LLVMIRBitstream:
-    O.OS << "LLVM IR\n";
-    break;
-  case ClangSerializedASTBitstream:
-    O.OS << "Clang Serialized AST\n";
-    break;
-  case ClangSerializedDiagnosticsBitstream:
-    O.OS << "Clang Serialized Diagnostics\n";
-    break;
-  }
-  O.OS << "  # Toplevel Blocks: " << NumTopBlocks << "\n";
-  O.OS << "\n";
-
-  // Emit per-block stats.
-  O.OS << "Per-block Summary:\n";
-  for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
-                                                     E = BlockIDStats.end();
-       I != E; ++I) {
-    O.OS << "  Block ID #" << I->first;
-    if (Optional<const char *> BlockName =
-            GetBlockName(I->first, BlockInfo, CurStreamType))
-      O.OS << " (" << *BlockName << ")";
-    O.OS << ":\n";
-
-    const PerBlockIDStats &Stats = I->second;
-    O.OS << "      Num Instances: " << Stats.NumInstances << "\n";
-    O.OS << "         Total Size: ";
-    printSize(O.OS, Stats.NumBits);
-    O.OS << "\n";
-    double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
-    O.OS << "    Percent of file: " << format("%2.4f%%", pct) << "\n";
-    if (Stats.NumInstances > 1) {
-      O.OS << "       Average Size: ";
-      printSize(O.OS, Stats.NumBits / (double)Stats.NumInstances);
-      O.OS << "\n";
-      O.OS << "  Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
-           << Stats.NumSubBlocks / (double)Stats.NumInstances << "\n";
-      O.OS << "    Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
-           << Stats.NumAbbrevs / (double)Stats.NumInstances << "\n";
-      O.OS << "    Tot/Avg Records: " << Stats.NumRecords << "/"
-           << Stats.NumRecords / (double)Stats.NumInstances << "\n";
-    } else {
-      O.OS << "      Num SubBlocks: " << Stats.NumSubBlocks << "\n";
-      O.OS << "        Num Abbrevs: " << Stats.NumAbbrevs << "\n";
-      O.OS << "        Num Records: " << Stats.NumRecords << "\n";
-    }
-    if (Stats.NumRecords) {
-      double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
-      O.OS << "    Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
-    }
-    O.OS << "\n";
-
-    // Print a histogram of the codes we see.
-    if (O.Histogram && !Stats.CodeFreq.empty()) {
-      std::vector<std::pair<unsigned, unsigned>> FreqPairs; // <freq,code>
-      for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
-        if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
-          FreqPairs.push_back(std::make_pair(Freq, i));
-      llvm::stable_sort(FreqPairs);
-      std::reverse(FreqPairs.begin(), FreqPairs.end());
-
-      O.OS << "\tRecord Histogram:\n";
-      O.OS << "\t\t  Count    # Bits     b/Rec   % Abv  Record Kind\n";
-      for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
-        const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second];
-
-        O.OS << format("\t\t%7d %9lu", RecStats.NumInstances,
-                       (unsigned long)RecStats.TotalBits);
-
-        if (RecStats.NumInstances > 1)
-          O.OS << format(" %9.1f",
-                         (double)RecStats.TotalBits / RecStats.NumInstances);
-        else
-          O.OS << "          ";
-
-        if (RecStats.NumAbbrev)
-          O.OS << format(" %7.2f", (double)RecStats.NumAbbrev /
-                                       RecStats.NumInstances * 100);
-        else
-          O.OS << "        ";
-
-        O.OS << "  ";
-        if (Optional<const char *> CodeName = GetCodeName(
-                FreqPairs[i].second, I->first, BlockInfo, CurStreamType))
-          O.OS << *CodeName << "\n";
-        else
-          O.OS << "UnknownCode" << FreqPairs[i].second << "\n";
-      }
-      O.OS << "\n";
-    }
-  }
-}
-
-Error BitcodeAnalyzer::parseBlock(unsigned BlockID, unsigned IndentLevel,
-                                  Optional<BCDumpOptions> O,
-                                  Optional<StringRef> CheckHash) {
-  std::string Indent(IndentLevel * 2, ' ');
-  uint64_t BlockBitStart = Stream.GetCurrentBitNo();
-
-  // Get the statistics for this BlockID.
-  PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
-
-  BlockStats.NumInstances++;
-
-  // BLOCKINFO is a special part of the stream.
-  bool DumpRecords = O.hasValue();
-  if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
-    if (O)
-      O->OS << Indent << "<BLOCKINFO_BLOCK/>\n";
-    Expected<Optional<BitstreamBlockInfo>> MaybeNewBlockInfo =
-        Stream.ReadBlockInfoBlock(/*ReadBlockInfoNames=*/true);
-    if (!MaybeNewBlockInfo)
-      return MaybeNewBlockInfo.takeError();
-    Optional<BitstreamBlockInfo> NewBlockInfo =
-        std::move(MaybeNewBlockInfo.get());
-    if (!NewBlockInfo)
-      return reportError("Malformed BlockInfoBlock");
-    BlockInfo = std::move(*NewBlockInfo);
-    if (Error Err = Stream.JumpToBit(BlockBitStart))
-      return Err;
-    // It's not really interesting to dump the contents of the blockinfo
-    // block.
-    DumpRecords = false;
-  }
-
-  unsigned NumWords = 0;
-  if (Error Err = Stream.EnterSubBlock(BlockID, &NumWords))
-    return Err;
-
-  // Keep it for later, when we see a MODULE_HASH record
-  uint64_t BlockEntryPos = Stream.getCurrentByteNo();
-
-  Optional<const char *> BlockName = None;
-  if (DumpRecords) {
-    O->OS << Indent << "<";
-    if ((BlockName = GetBlockName(BlockID, BlockInfo, CurStreamType)))
-      O->OS << *BlockName;
-    else
-      O->OS << "UnknownBlock" << BlockID;
-
-    if (!O->Symbolic && BlockName)
-      O->OS << " BlockID=" << BlockID;
-
-    O->OS << " NumWords=" << NumWords
-          << " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n";
-  }
-
-  SmallVector<uint64_t, 64> Record;
-
-  // Keep the offset to the metadata index if seen.
-  uint64_t MetadataIndexOffset = 0;
-
-  // Read all the records for this block.
-  while (1) {
-    if (Stream.AtEndOfStream())
-      return reportError("Premature end of bitstream");
-
-    uint64_t RecordStartBit = Stream.GetCurrentBitNo();
-
-    Expected<BitstreamEntry> MaybeEntry =
-        Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
-    if (!MaybeEntry)
-      return MaybeEntry.takeError();
-    BitstreamEntry Entry = MaybeEntry.get();
-
-    switch (Entry.Kind) {
-    case BitstreamEntry::Error:
-      return reportError("malformed bitcode file");
-    case BitstreamEntry::EndBlock: {
-      uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
-      BlockStats.NumBits += BlockBitEnd - BlockBitStart;
-      if (DumpRecords) {
-        O->OS << Indent << "</";
-        if (BlockName)
-          O->OS << *BlockName << ">\n";
-        else
-          O->OS << "UnknownBlock" << BlockID << ">\n";
-      }
-      return Error::success();
-    }
-
-    case BitstreamEntry::SubBlock: {
-      uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
-      if (Error E = parseBlock(Entry.ID, IndentLevel + 1, O, CheckHash))
-        return E;
-      ++BlockStats.NumSubBlocks;
-      uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
-
-      // Don't include subblock sizes in the size of this block.
-      BlockBitStart += SubBlockBitEnd - SubBlockBitStart;
-      continue;
-    }
-    case BitstreamEntry::Record:
-      // The interesting case.
-      break;
-    }
-
-    if (Entry.ID == bitc::DEFINE_ABBREV) {
-      if (Error Err = Stream.ReadAbbrevRecord())
-        return Err;
-      ++BlockStats.NumAbbrevs;
-      continue;
-    }
-
-    Record.clear();
-
-    ++BlockStats.NumRecords;
-
-    StringRef Blob;
-    uint64_t CurrentRecordPos = Stream.GetCurrentBitNo();
-    Expected<unsigned> MaybeCode = Stream.readRecord(Entry.ID, Record, &Blob);
-    if (!MaybeCode)
-      return MaybeCode.takeError();
-    unsigned Code = MaybeCode.get();
-
-    // Increment the # occurrences of this code.
-    if (BlockStats.CodeFreq.size() <= Code)
-      BlockStats.CodeFreq.resize(Code + 1);
-    BlockStats.CodeFreq[Code].NumInstances++;
-    BlockStats.CodeFreq[Code].TotalBits +=
-        Stream.GetCurrentBitNo() - RecordStartBit;
-    if (Entry.ID != bitc::UNABBREV_RECORD) {
-      BlockStats.CodeFreq[Code].NumAbbrev++;
-      ++BlockStats.NumAbbreviatedRecords;
-    }
-
-    if (DumpRecords) {
-      O->OS << Indent << "  <";
-      Optional<const char *> CodeName =
-          GetCodeName(Code, BlockID, BlockInfo, CurStreamType);
-      if (CodeName)
-        O->OS << *CodeName;
-      else
-        O->OS << "UnknownCode" << Code;
-      if (!O->Symbolic && CodeName)
-        O->OS << " codeid=" << Code;
-      const BitCodeAbbrev *Abbv = nullptr;
-      if (Entry.ID != bitc::UNABBREV_RECORD) {
-        Abbv = Stream.getAbbrev(Entry.ID);
-        O->OS << " abbrevid=" << Entry.ID;
-      }
-
-      for (unsigned i = 0, e = Record.size(); i != e; ++i)
-        O->OS << " op" << i << "=" << (int64_t)Record[i];
-
-      // If we found a metadata index, let's verify that we had an offset
-      // before and validate its forward reference offset was correct!
-      if (BlockID == bitc::METADATA_BLOCK_ID) {
-        if (Code == bitc::METADATA_INDEX_OFFSET) {
-          if (Record.size() != 2)
-            O->OS << "(Invalid record)";
-          else {
-            auto Offset = Record[0] + (Record[1] << 32);
-            MetadataIndexOffset = Stream.GetCurrentBitNo() + Offset;
-          }
-        }
-        if (Code == bitc::METADATA_INDEX) {
-          O->OS << " (offset ";
-          if (MetadataIndexOffset == RecordStartBit)
-            O->OS << "match)";
-          else
-            O->OS << "mismatch: " << MetadataIndexOffset << " vs "
-                  << RecordStartBit << ")";
-        }
-      }
-
-      // If we found a module hash, let's verify that it matches!
-      if (BlockID == bitc::MODULE_BLOCK_ID && Code == bitc::MODULE_CODE_HASH &&
-          CheckHash.hasValue()) {
-        if (Record.size() != 5)
-          O->OS << " (invalid)";
-        else {
-          // Recompute the hash and compare it to the one in the bitcode
-          SHA1 Hasher;
-          StringRef Hash;
-          Hasher.update(*CheckHash);
-          {
-            int BlockSize = (CurrentRecordPos / 8) - BlockEntryPos;
-            auto Ptr = Stream.getPointerToByte(BlockEntryPos, BlockSize);
-            Hasher.update(ArrayRef<uint8_t>(Ptr, BlockSize));
-            Hash = Hasher.result();
-          }
-          SmallString<20> RecordedHash;
-          RecordedHash.resize(20);
-          int Pos = 0;
-          for (auto &Val : Record) {
-            assert(!(Val >> 32) && "Unexpected high bits set");
-            RecordedHash[Pos++] = (Val >> 24) & 0xFF;
-            RecordedHash[Pos++] = (Val >> 16) & 0xFF;
-            RecordedHash[Pos++] = (Val >> 8) & 0xFF;
-            RecordedHash[Pos++] = (Val >> 0) & 0xFF;
-          }
-          if (Hash == RecordedHash)
-            O->OS << " (match)";
-          else
-            O->OS << " (!mismatch!)";
-        }
-      }
-
-      O->OS << "/>";
-
-      if (Abbv) {
-        for (unsigned i = 1, e = Abbv->getNumOperandInfos(); i != e; ++i) {
-          const BitCodeAbbrevOp &Op = Abbv->getOperandInfo(i);
-          if (!Op.isEncoding() || Op.getEncoding() != BitCodeAbbrevOp::Array)
-            continue;
-          assert(i + 2 == e && "Array op not second to last");
-          std::string Str;
-          bool ArrayIsPrintable = true;
-          for (unsigned j = i - 1, je = Record.size(); j != je; ++j) {
-            if (!isPrint(static_cast<unsigned char>(Record[j]))) {
-              ArrayIsPrintable = false;
-              break;
-            }
-            Str += (char)Record[j];
-          }
-          if (ArrayIsPrintable)
-            O->OS << " record string = '" << Str << "'";
-          break;
-        }
-      }
-
-      if (Blob.data()) {
-        if (canDecodeBlob(Code, BlockID)) {
-          if (Error E = decodeMetadataStringsBlob(Indent, Record, Blob, O->OS))
-            return E;
-        } else {
-          O->OS << " blob data = ";
-          if (O->ShowBinaryBlobs) {
-            O->OS << "'";
-            O->OS.write_escaped(Blob, /*hex=*/true) << "'";
-          } else {
-            bool BlobIsPrintable = true;
-            for (unsigned i = 0, e = Blob.size(); i != e; ++i)
-              if (!isPrint(static_cast<unsigned char>(Blob[i]))) {
-                BlobIsPrintable = false;
-                break;
-              }
-
-            if (BlobIsPrintable)
-              O->OS << "'" << Blob << "'";
-            else
-              O->OS << "unprintable, " << Blob.size() << " bytes.";
-          }
-        }
-      }
-
-      O->OS << "\n";
-    }
-
-    // Make sure that we can skip the current record.
-    if (Error Err = Stream.JumpToBit(CurrentRecordPos))
-      return Err;
-    if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
-      ; // Do nothing.
-    else
-      return Skipped.takeError();
-  }
-}
-