[Analysis] Remove unused functions from TargetLibraryInfo

[david-arm]

Summary

A simple clean-up to remove dead code.

llvm/include/llvm/Analysis/TargetLibraryInfo.h

public:
   /// Return true if the function F has a vector equivalent with any
   /// vectorization factor.
   bool isFunctionVectorizable(StringRef F) const;
 
   /// Return the name of the equivalent of F, vectorized with factor VF. If no
   /// such mapping exists, return the empty string.
   StringRef getVectorizedFunction(StringRef F, unsigned VF) const;
 
-  /// Return true if the function F has a scalar equivalent, and set VF to be
-  /// the vectorization factor.
-  bool isFunctionScalarizable(StringRef F, unsigned &VF) const {
-    return !getScalarizedFunction(F, VF).empty();
-  }
-
-  /// Return the name of the equivalent of F, scalarized. If no such mapping
-  /// exists, return the empty string.
-  ///
-  /// Set VF to the vectorization factor.
-  StringRef getScalarizedFunction(StringRef F, unsigned &VF) const;
-
   /// Set to true iff i32 parameters to library functions should have signext
   /// or zeroext attributes if they correspond to C-level int or unsigned int,
   /// respectively.
   void setShouldExtI32Param(bool Val) {
     ShouldExtI32Param = Val;
   }
 
   /// Set to true iff i32 results from library functions should have signext

llvm/lib/Analysis/TargetLibraryInfo.cpp

 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
   return LHS.VectorFnName < RHS.VectorFnName;
 }
 
 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
   return LHS.ScalarFnName < S;
 }
 
-static bool compareWithVectorFnName(const VecDesc &LHS, StringRef S) {
-  return LHS.VectorFnName < S;
-}
-
 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
   llvm::append_range(VectorDescs, Fns);
   llvm::sort(VectorDescs, compareByScalarFnName);
 
   llvm::append_range(ScalarDescs, Fns);
   llvm::sort(ScalarDescs, compareByVectorFnName);
 }
 
StringRef TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
     if (I->VectorizationFactor == VF)
       return I->VectorFnName;
     ++I;
   }
   return StringRef();
 }
 
-StringRef TargetLibraryInfoImpl::getScalarizedFunction(StringRef F,
-                                                       unsigned &VF) const {
-  F = sanitizeFunctionName(F);
-  if (F.empty())
-    return F;
-
-  std::vector<VecDesc>::const_iterator I =
-      llvm::lower_bound(ScalarDescs, F, compareWithVectorFnName);
-  if (I == VectorDescs.end() || StringRef(I->VectorFnName) != F)
-    return StringRef();
-  VF = I->VectorizationFactor;
-  return I->ScalarFnName;
-}
-
 TargetLibraryInfo TargetLibraryAnalysis::run(const Function &F,
                                              FunctionAnalysisManager &) {
   if (!BaselineInfoImpl)
     BaselineInfoImpl =
         TargetLibraryInfoImpl(Triple(F.getParent()->getTargetTriple()));
   return TargetLibraryInfo(*BaselineInfoImpl, &F);
 }