C++ SMRange类代码示例

/// GetMessage - Return an SMDiagnostic at the specified location with the
/// specified string.
///
/// @param Type - If non-null, the kind of message (e.g., "error") which is
/// prefixed to the message.
SMDiagnostic SourceMgr::GetMessage(SMLoc Loc, SourceMgr::DiagKind Kind,
                                   const Twine &Msg,
                                   ArrayRef<SMRange> Ranges) const {

  // First thing to do: find the current buffer containing the specified
  // location.
  int CurBuf = FindBufferContainingLoc(Loc);
  assert(CurBuf != -1 && "Invalid or unspecified location!");

  MemoryBuffer *CurMB = getBufferInfo(CurBuf).Buffer;

  // Scan backward to find the start of the line.
  const char *LineStart = Loc.getPointer();
  while (LineStart != CurMB->getBufferStart() &&
         LineStart[-1] != '\n' && LineStart[-1] != '\r')
    --LineStart;

  // Get the end of the line.
  const char *LineEnd = Loc.getPointer();
  while (LineEnd != CurMB->getBufferEnd() &&
         LineEnd[0] != '\n' && LineEnd[0] != '\r')
    ++LineEnd;
  std::string LineStr(LineStart, LineEnd);

  // Convert any ranges to column ranges that only intersect the line of the
  // location.
  SmallVector<std::pair<unsigned, unsigned>, 4> ColRanges;
  for (unsigned i = 0, e = Ranges.size(); i != e; ++i) {
    SMRange R = Ranges[i];
    if (!R.isValid()) continue;
    
    // If the line doesn't contain any part of the range, then ignore it.
    if (R.Start.getPointer() > LineEnd || R.End.getPointer() < LineStart)
      continue;
   
    // Ignore pieces of the range that go onto other lines.
    if (R.Start.getPointer() < LineStart)
      R.Start = SMLoc::getFromPointer(LineStart);
    if (R.End.getPointer() > LineEnd)
      R.End = SMLoc::getFromPointer(LineEnd);
    
    // Translate from SMLoc ranges to column ranges.
    ColRanges.push_back(std::make_pair(R.Start.getPointer()-LineStart,
                                       R.End.getPointer()-LineStart));
  }
  
  return SMDiagnostic(*this, Loc,
                      CurMB->getBufferIdentifier(), FindLineNumber(Loc, CurBuf),
                      Loc.getPointer()-LineStart, Kind, Msg.str(),
                      LineStr, ColRanges);
}

SMDiagnostic MIRParserImpl::diagFromLLVMAssemblyDiag(const SMDiagnostic &Error,
                                                     SMRange SourceRange) {
  assert(SourceRange.isValid());

  // Translate the location of the error from the location in the llvm IR string
  // to the corresponding location in the MIR file.
  auto LineAndColumn = SM.getLineAndColumn(SourceRange.Start);
  unsigned Line = LineAndColumn.first + Error.getLineNo() - 1;
  unsigned Column = Error.getColumnNo();
  StringRef LineStr = Error.getLineContents();
  SMLoc Loc = Error.getLoc();

  // Get the full line and adjust the column number by taking the indentation of
  // LLVM IR into account.
  for (line_iterator L(*SM.getMemoryBuffer(SM.getMainFileID()), false), E;
       L != E; ++L) {
    if (L.line_number() == Line) {
      LineStr = *L;
      Loc = SMLoc::getFromPointer(LineStr.data());
      auto Indent = LineStr.find(Error.getLineContents());
      if (Indent != StringRef::npos)
        Column += Indent;
      break;
    }
  }

  return SMDiagnostic(SM, Loc, Filename, Line, Column, Error.getKind(),
                      Error.getMessage(), LineStr, Error.getRanges(),
                      Error.getFixIts());
}

SMDiagnostic MIRParserImpl::diagFromMIStringDiag(const SMDiagnostic &Error,
                                                 SMRange SourceRange) {
  assert(SourceRange.isValid() && "Invalid source range");
  SMLoc Loc = SourceRange.Start;
  bool HasQuote = Loc.getPointer() < SourceRange.End.getPointer() &&
                  *Loc.getPointer() == '\'';
  // Translate the location of the error from the location in the MI string to
  // the corresponding location in the MIR file.
  Loc = Loc.getFromPointer(Loc.getPointer() + Error.getColumnNo() +
                           (HasQuote ? 1 : 0));

  // TODO: Translate any source ranges as well.
  return SM.GetMessage(Loc, Error.getKind(), Error.getMessage(), None,
                       Error.getFixIts());
}

SMDiagnostic SourceMgr::GetMessage(SMLoc Loc, SourceMgr::DiagKind Kind,
                                   const Twine &Msg,
                                   ArrayRef<SMRange> Ranges,
                                   ArrayRef<SMFixIt> FixIts) const {

  // First thing to do: find the current buffer containing the specified
  // location to pull out the source line.
  SmallVector<std::pair<unsigned, unsigned>, 4> ColRanges;
  std::pair<unsigned, unsigned> LineAndCol;
  const char *BufferID = "<unknown>";
  std::string LineStr;
  
  if (Loc.isValid()) {
    unsigned CurBuf = FindBufferContainingLoc(Loc);
    assert(CurBuf && "Invalid or unspecified location!");

    const MemoryBuffer *CurMB = getMemoryBuffer(CurBuf);
    BufferID = CurMB->getBufferIdentifier();
    
    // Scan backward to find the start of the line.
    const char *LineStart = Loc.getPointer();
    const char *BufStart = CurMB->getBufferStart();
    while (LineStart != BufStart && LineStart[-1] != '\n' &&
           LineStart[-1] != '\r')
      --LineStart;

    // Get the end of the line.
    const char *LineEnd = Loc.getPointer();
    const char *BufEnd = CurMB->getBufferEnd();
    while (LineEnd != BufEnd && LineEnd[0] != '\n' && LineEnd[0] != '\r')
      ++LineEnd;
    LineStr = std::string(LineStart, LineEnd);

    // Convert any ranges to column ranges that only intersect the line of the
    // location.
    for (unsigned i = 0, e = Ranges.size(); i != e; ++i) {
      SMRange R = Ranges[i];
      if (!R.isValid()) continue;
      
      // If the line doesn't contain any part of the range, then ignore it.
      if (R.Start.getPointer() > LineEnd || R.End.getPointer() < LineStart)
        continue;
     
      // Ignore pieces of the range that go onto other lines.
      if (R.Start.getPointer() < LineStart)
        R.Start = SMLoc::getFromPointer(LineStart);
      if (R.End.getPointer() > LineEnd)
        R.End = SMLoc::getFromPointer(LineEnd);
      
      // Translate from SMLoc ranges to column ranges.
      // FIXME: Handle multibyte characters.
      ColRanges.push_back(std::make_pair(R.Start.getPointer()-LineStart,
                                         R.End.getPointer()-LineStart));
    }

    LineAndCol = getLineAndColumn(Loc, CurBuf);
  }
    
  return SMDiagnostic(*this, Loc, BufferID, LineAndCol.first,
                      LineAndCol.second-1, Kind, Msg.str(),
                      LineStr, ColRanges, FixIts);
}

/// \brief Invert the 1-[0/1] mapping of diags to group into a one to many
/// mapping of groups to diags in the group.
static void groupDiagnostics(const std::vector<Record*> &Diags,
                             const std::vector<Record*> &DiagGroups,
                             std::map<std::string, GroupInfo> &DiagsInGroup) {

  for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
    const Record *R = Diags[i];
    DefInit *DI = dyn_cast<DefInit>(R->getValueInit("Group"));
    if (!DI)
      continue;
    assert(R->getValueAsDef("Class")->getName() != "CLASS_NOTE" &&
           "Note can't be in a DiagGroup");
    std::string GroupName = DI->getDef()->getValueAsString("GroupName");
    DiagsInGroup[GroupName].DiagsInGroup.push_back(R);
  }

  typedef SmallPtrSet<GroupInfo *, 16> GroupSetTy;
  GroupSetTy ImplicitGroups;

  // Add all DiagGroup's to the DiagsInGroup list to make sure we pick up empty
  // groups (these are warnings that GCC supports that clang never produces).
  for (unsigned i = 0, e = DiagGroups.size(); i != e; ++i) {
    Record *Group = DiagGroups[i];
    GroupInfo &GI = DiagsInGroup[Group->getValueAsString("GroupName")];
    if (Group->isAnonymous()) {
      if (GI.DiagsInGroup.size() > 1)
        ImplicitGroups.insert(&GI);
    } else {
      if (GI.ExplicitDef)
        assert(GI.ExplicitDef == Group);
      else
        GI.ExplicitDef = Group;
    }

    std::vector<Record*> SubGroups = Group->getValueAsListOfDefs("SubGroups");
    for (unsigned j = 0, e = SubGroups.size(); j != e; ++j)
      GI.SubGroups.push_back(SubGroups[j]->getValueAsString("GroupName"));
  }

  // Assign unique ID numbers to the groups.
  unsigned IDNo = 0;
  for (std::map<std::string, GroupInfo>::iterator
       I = DiagsInGroup.begin(), E = DiagsInGroup.end(); I != E; ++I, ++IDNo)
    I->second.IDNo = IDNo;

  // Sort the implicit groups, so we can warn about them deterministically.
  SmallVector<GroupInfo *, 16> SortedGroups(ImplicitGroups.begin(),
                                            ImplicitGroups.end());
  for (SmallVectorImpl<GroupInfo *>::iterator I = SortedGroups.begin(),
                                              E = SortedGroups.end();
       I != E; ++I) {
    MutableArrayRef<const Record *> GroupDiags = (*I)->DiagsInGroup;
    std::sort(GroupDiags.begin(), GroupDiags.end(), beforeThanCompare);
  }
  std::sort(SortedGroups.begin(), SortedGroups.end(), beforeThanCompareGroups);

  // Warn about the same group being used anonymously in multiple places.
  for (SmallVectorImpl<GroupInfo *>::const_iterator I = SortedGroups.begin(),
                                                    E = SortedGroups.end();
       I != E; ++I) {
    ArrayRef<const Record *> GroupDiags = (*I)->DiagsInGroup;

    if ((*I)->ExplicitDef) {
      std::string Name = (*I)->ExplicitDef->getValueAsString("GroupName");
      for (ArrayRef<const Record *>::const_iterator DI = GroupDiags.begin(),
                                                    DE = GroupDiags.end();
           DI != DE; ++DI) {
        const DefInit *GroupInit = cast<DefInit>((*DI)->getValueInit("Group"));
        const Record *NextDiagGroup = GroupInit->getDef();
        if (NextDiagGroup == (*I)->ExplicitDef)
          continue;

        SMRange InGroupRange = findSuperClassRange(*DI, "InGroup");
        SmallString<64> Replacement;
        if (InGroupRange.isValid()) {
          Replacement += "InGroup<";
          Replacement += (*I)->ExplicitDef->getName();
          Replacement += ">";
        }
        SMFixIt FixIt(InGroupRange, Replacement.str());

        SrcMgr.PrintMessage(NextDiagGroup->getLoc().front(),
                            SourceMgr::DK_Error,
                            Twine("group '") + Name +
                              "' is referred to anonymously",
                            None,
                            InGroupRange.isValid() ? FixIt
                                                   : ArrayRef<SMFixIt>());
        SrcMgr.PrintMessage((*I)->ExplicitDef->getLoc().front(),
                            SourceMgr::DK_Note, "group defined here");
      }
    } else {
      // If there's no existing named group, we should just warn once and use
      // notes to list all the other cases.
      ArrayRef<const Record *>::const_iterator DI = GroupDiags.begin(),
                                               DE = GroupDiags.end();
      assert(DI != DE && "We only care about groups with multiple uses!");

      const DefInit *GroupInit = cast<DefInit>((*DI)->getValueInit("Group"));
//.........这里部分代码省略.........