Finish revert "[SystemZ][z/OS] TXT records in the GOFF reader (#74526)"

This finishes the revert started in
aeb8628 which didn't completely back
out the original patch.

Author: boomanaiden154

llvm/lib/Object/GOFFObjectFile.cpp

@@ -394,154 +394,6 @@ GOFFObjectFile::getSectionPrEsdRecord(uint32_t SectionIndex) const {
   return EsdRecord;
 }
 
-uint32_t GOFFObjectFile::getSectionDefEsdId(DataRefImpl &Sec) const {
-  const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
-  uint32_t Length;
-  ESDRecord::getLength(EsdRecord, Length);
-  if (Length == 0) {
-    const uint8_t *PrEsdRecord = getSectionPrEsdRecord(Sec);
-    if (PrEsdRecord)
-      EsdRecord = PrEsdRecord;
-  }
-
-  uint32_t DefEsdId;
-  ESDRecord::getEsdId(EsdRecord, DefEsdId);
-  LLVM_DEBUG(dbgs() << "Got def EsdId: " << DefEsdId << '\n');
-  return DefEsdId;
-}
-
-void GOFFObjectFile::moveSectionNext(DataRefImpl &Sec) const {
-  Sec.d.a++;
-  if ((Sec.d.a) >= SectionList.size())
-    Sec.d.a = 0;
-}
-
-Expected<StringRef> GOFFObjectFile::getSectionName(DataRefImpl Sec) const {
-  DataRefImpl EdSym;
-  SectionEntryImpl EsdIds = SectionList[Sec.d.a];
-  EdSym.d.a = EsdIds.d.a;
-  Expected<StringRef> Name = getSymbolName(EdSym);
-  if (Name) {
-    StringRef Res = *Name;
-    LLVM_DEBUG(dbgs() << "Got section: " << Res << '\n');
-    LLVM_DEBUG(dbgs() << "Final section name: " << Res << '\n');
-    Name = Res;
-  }
-  return Name;
-}
-
-uint64_t GOFFObjectFile::getSectionAddress(DataRefImpl Sec) const {
-  uint32_t Offset;
-  const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
-  ESDRecord::getOffset(EsdRecord, Offset);
-  return Offset;
-}
-
-uint64_t GOFFObjectFile::getSectionSize(DataRefImpl Sec) const {
-  uint32_t Length;
-  uint32_t DefEsdId = getSectionDefEsdId(Sec);
-  const uint8_t *EsdRecord = EsdPtrs[DefEsdId];
-  ESDRecord::getLength(EsdRecord, Length);
-  LLVM_DEBUG(dbgs() << "Got section size: " << Length << '\n');
-  return static_cast<uint64_t>(Length);
-}
-
-// Unravel TXT records and expand fill characters to produce
-// a contiguous sequence of bytes.
-Expected<ArrayRef<uint8_t>>
-GOFFObjectFile::getSectionContents(DataRefImpl Sec) const {
-  if (SectionDataCache.count(Sec.d.a)) {
-    auto &Buf = SectionDataCache[Sec.d.a];
-    return ArrayRef<uint8_t>(Buf);
-  }
-  uint64_t SectionSize = getSectionSize(Sec);
-  uint32_t DefEsdId = getSectionDefEsdId(Sec);
-
-  const uint8_t *EdEsdRecord = getSectionEdEsdRecord(Sec);
-  bool FillBytePresent;
-  ESDRecord::getFillBytePresent(EdEsdRecord, FillBytePresent);
-  uint8_t FillByte = '\0';
-  if (FillBytePresent)
-    ESDRecord::getFillByteValue(EdEsdRecord, FillByte);
-
-  // Initialize section with fill byte.
-  SmallVector<uint8_t> Data(SectionSize, FillByte);
-
-  // Replace section with content from text records.
-  for (const uint8_t *TxtRecordInt : TextPtrs) {
-    const uint8_t *TxtRecordPtr = TxtRecordInt;
-    uint32_t TxtEsdId;
-    TXTRecord::getElementEsdId(TxtRecordPtr, TxtEsdId);
-    LLVM_DEBUG(dbgs() << "Got txt EsdId: " << TxtEsdId << '\n');
-
-    if (TxtEsdId != DefEsdId)
-      continue;
-
-    uint32_t TxtDataOffset;
-    TXTRecord::getOffset(TxtRecordPtr, TxtDataOffset);
-
-    uint16_t TxtDataSize;
-    TXTRecord::getDataLength(TxtRecordPtr, TxtDataSize);
-
-    LLVM_DEBUG(dbgs() << "Record offset " << TxtDataOffset << ", data size "
-                      << TxtDataSize << "\n");
-
-    SmallString<256> CompleteData;
-    CompleteData.reserve(TxtDataSize);
-    if (Error Err = TXTRecord::getData(TxtRecordPtr, CompleteData))
-      return std::move(Err);
-    assert(CompleteData.size() == TxtDataSize && "Wrong length of data");
-    std::copy(CompleteData.data(), CompleteData.data() + TxtDataSize,
-              Data.begin() + TxtDataOffset);
-  }
-  SectionDataCache[Sec.d.a] = Data;
-  return ArrayRef<uint8_t>(Data);
-}
-
-uint64_t GOFFObjectFile::getSectionAlignment(DataRefImpl Sec) const {
-  const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
-  GOFF::ESDAlignment Pow2Alignment;
-  ESDRecord::getAlignment(EsdRecord, Pow2Alignment);
-  return 1ULL << static_cast<uint64_t>(Pow2Alignment);
-}
-
-bool GOFFObjectFile::isSectionText(DataRefImpl Sec) const {
-  const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
-  GOFF::ESDExecutable Executable;
-  ESDRecord::getExecutable(EsdRecord, Executable);
-  return Executable == GOFF::ESD_EXE_CODE;
-}
-
-bool GOFFObjectFile::isSectionData(DataRefImpl Sec) const {
-  const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
-  GOFF::ESDExecutable Executable;
-  ESDRecord::getExecutable(EsdRecord, Executable);
-  return Executable == GOFF::ESD_EXE_DATA;
-}
-
-bool GOFFObjectFile::isSectionNoLoad(DataRefImpl Sec) const {
-  const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
-  GOFF::ESDLoadingBehavior LoadingBehavior;
-  ESDRecord::getLoadingBehavior(EsdRecord, LoadingBehavior);
-  return LoadingBehavior == GOFF::ESD_LB_NoLoad;
-}
-
-bool GOFFObjectFile::isSectionReadOnlyData(DataRefImpl Sec) const {
-  if (!isSectionData(Sec))
-    return false;
-
-  const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
-  GOFF::ESDLoadingBehavior LoadingBehavior;
-  ESDRecord::getLoadingBehavior(EsdRecord, LoadingBehavior);
-  return LoadingBehavior == GOFF::ESD_LB_Initial;
-}
-
-bool GOFFObjectFile::isSectionZeroInit(DataRefImpl Sec) const {
-  // GOFF uses fill characters and fill characters are applied
-  // on getSectionContents() - so we say false to zero init.
-  return false;
-}
-
 section_iterator GOFFObjectFile::section_begin() const {
   DataRefImpl Sec;
   moveSectionNext(Sec);