Function readModuleTriple

src/lib/Bitcode/Reader/BitcodeReader.cpp:308–345

}

static Expected<std::string> readModuleTriple(BitstreamCursor &Stream) {
  if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
    return error("Invalid record");

  SmallVector<uint64_t, 64> Record;

  std::string Triple;

  // Read all the records for this module.
  while (true) {
    BitstreamEntry Entry = Stream.advanceSkippingSubblocks();

    switch (Entry.Kind) {
    case BitstreamEntry::SubBlock: // Handled for us already.
    case BitstreamEntry::Error:
      return error("Malformed block");
    case BitstreamEntry::EndBlock:
      return Triple;
    case BitstreamEntry::Record:
      // The interesting case.
      break;
    }

    // Read a record.
    switch (Stream.readRecord(Entry.ID, Record)) {
    default: break;  // Default behavior, ignore unknown content.
    case bitc::MODULE_CODE_TRIPLE: {  // TRIPLE: [strchr x N]
      std::string S;
      if (convertToString(Record, 0, S))
        return error("Invalid record");
      Triple = S;
      break;
    }
    }
    Record.clear();
  }
  llvm_unreachable("Exit infinite loop");
}

static Expected<std::string> readTriple(BitstreamCursor &Stream) {
  // We expect a number of well-defined blocks, though we don't necessarily