[llvm] [FileCheck][NFC] Encapsulate more into InputAnnotationLabeler (PR #207484)

[Joel E. Denny via llvm-commits]

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@@ -427,63 +427,84 @@ static std::string GetCheckTypeAbbreviation(Check::FileCheckType Ty) {
 }
 
 namespace {
-/// Stores all information needed to generate \c InputAnnotation labels for a
-/// particular check pattern.  Multiple labelers might be constructed for the
-/// same pattern if the pattern has more than one \c MatchResultDiag (e.g., for
-/// a \c CHECK-COUNT-<N> directive or implicit pattern).
+/// Stores all information needed to generate \c InputAnnotation labels.
 class InputAnnotationLabeler {
 private:
-  unsigned *LabelWidthGlobal;
-  unsigned *LabelIndexPerPattern;
-  std::string LabelPrefix;
+  struct CompareSMLoc {
+    bool operator()(SMLoc LHS, SMLoc RHS) const {
+      return LHS.getPointer() < RHS.getPointer();
+    }
+  };
+
+  const SourceMgr &SM;
+  const unsigned CheckFileBufferID;
+  const std::pair<unsigned, unsigned> ImpPatBufferIDRange;
+
+  /// How many unique input annotation labels does each check pattern need?
+  /// Each check pattern can have multiple \c MatchResultDiag's, each followed
+  /// by a series of zero or more \c MatchNoteDiag's.  Each such
+  /// \c MatchResultDiag and its \c MatchNoteDiag series can require multiple
+  /// labels.
+  std::map<SMLoc, unsigned, CompareSMLoc> LabelCountPerPattern;
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jdenny-ornl wrote:

Thanks.  Done.

Does the docs' statement about [special marker values](https://llvm.org/docs/ProgrammersManual.html#llvm-adt-densemap-h)  need to be updated?

https://github.com/llvm/llvm-project/pull/207484