Demo fix for modernize-use-override (WIP)

[Eugene.Zelenko]

By the word, since Clang-tidy issue was fixed at least in this part of LLVM code base, it's reasonable to enable this check in local .clang-tidy, so it'll be enforced automatically for those who run the tool.

[mehdi_amini]

@Eugene.Zelenko do you mean like this: https://reviews.llvm.org/D116185 ?

[Eugene.Zelenko]

In D116356#3212961, @mehdi_amini wrote:

@Eugene.Zelenko do you mean like this: https://reviews.llvm.org/D116185 ?

Yes. And same applies for other Clang-tidy checks run on examples code.

[mehdi_amini]

I don't quite get what you mean by "run on examples code"?

[Eugene.Zelenko]

Sorry for being unclear. I mean checks applied in D116355, D116359, etc.

[mehdi_amini]

Right, I opened D116185 first, and then all these revision are here to illustrate the effect of these checks before we add them to the config.
So to be clear: I'm exclusively running checks that I'm also adding to the config in D116185.

mlir/lib/ExecutionEngine/SparseTensorUtils.cpp

if (tensor) {
       uint64_t nnz = tensor->getElements().size();
       values.reserve(nnz);
       fromCOO(tensor, 0, nnz, 0);
     } else if (allDense) {
       values.resize(sz, 0);
     }
   }
 
-  virtual ~SparseTensorStorage() = default;
+  ~SparseTensorStorage() override = default;
 
   /// Get the rank of the tensor.
   uint64_t getRank() const { return sizes.size(); }
 
   /// Get the size in the given dimension of the tensor.
   uint64_t getDimSize(uint64_t d) override {
     assert(d < getRank());
     return sizes[d];

mlir/unittests/Dialect/Quant/QuantizationUtilsTest.cpp

 namespace {
 
 // Test UniformQuantizedValueConverter converts all APFloat to a magic number 5.
 class TestUniformQuantizedValueConverter
     : public UniformQuantizedValueConverter {
 public:
   TestUniformQuantizedValueConverter(UniformQuantizedType type)
       : UniformQuantizedValueConverter(type), qtype(type) {}
-  APInt quantizeFloatToInt(APFloat expressedValue) const {
+  APInt quantizeFloatToInt(APFloat expressedValue) const override {
     return APInt(qtype.getStorageType().cast<IntegerType>().getWidth(), 5L);
   }
 
 private:
   UniformQuantizedType qtype;
 };
 
 Attribute getTestFloatAttr(double value, MLIRContext *ctx) {