[CodeGen] Disable default copy assignment operator for struct VectorInfo

[yubing]

Summary

struct VectorInfo manages resources such as dynamically allocated memory, it's generally a good practice to either implement a custom copy constructor or disable the default one

[kazu]

Thanks!

llvm/lib/CodeGen/InterleavedLoadCombinePass.cpp

public:
 
   /// Vector Type
   FixedVectorType *const VTy;
 
   VectorInfo(FixedVectorType *VTy) : VTy(VTy) {
     EI = new ElementInfo[VTy->getNumElements()];
   }
 
+  VectorInfo &operator=(const VectorInfo &other) = delete;
+
   virtual ~VectorInfo() { delete[] EI; }
 
   unsigned getDimension() const { return VTy->getNumElements(); }
 
   /// Test if the VectorInfo can be part of an interleaved load with the
   /// specified factor.
   ///
   /// \param Factor of the interleave