Demo fix for modernize-use-equals-default (WIP)

[Mogball]

Huh, so it seems this one in conjunction with error-prone-copy-constructor would make them into = default.

[mehdi_amini]

In D116247#3208908, @Mogball wrote:

Huh, so it seems this one in conjunction with error-prone-copy-constructor would make them into = default.

Yes, I applied them individually right now. Also you have to run clang-tidy multiple times to reach "fix point" on a file, I haven't done that right now.

[mehdi_amini]

Full repo run

mlir/test/lib/Dialect/Affine/TestAffineLoopUnswitching.cpp

 /// This pass applies the permutation on the first maximal perfect nest.
 struct TestAffineLoopUnswitching
     : public PassWrapper<TestAffineLoopUnswitching, FunctionPass> {
   StringRef getArgument() const final { return PASS_NAME; }
   StringRef getDescription() const final {
     return "Tests affine loop unswitching / if/else hoisting";
   }
   TestAffineLoopUnswitching() = default;
-  TestAffineLoopUnswitching(const TestAffineLoopUnswitching &pass)
-      : PassWrapper(pass) {}
+  TestAffineLoopUnswitching(const TestAffineLoopUnswitching &pass) = default;
 
   void runOnFunction() override;
 
   /// The maximum number of iterations to run this for.
   constexpr static unsigned kMaxIterations = 5;
 };
 
 } // namespace

mlir/test/lib/Dialect/Linalg/TestLinalgDistribution.cpp

 }
 
 namespace {
 struct TestLinalgDistribution
     : public PassWrapper<TestLinalgDistribution, FunctionPass> {
   StringRef getArgument() const final { return "test-linalg-distribution"; }
   StringRef getDescription() const final { return "Test Linalg distribution."; }
   TestLinalgDistribution() = default;
-  TestLinalgDistribution(const TestLinalgDistribution &pass)
-      : PassWrapper(pass) {}
+  TestLinalgDistribution(const TestLinalgDistribution &pass) = default;
   void getDependentDialects(DialectRegistry &registry) const override {
     registry.insert<AffineDialect, gpu::GPUDialect>();
   }
 
   void runOnFunction() override;
 };
 } // namespace
 

mlir/test/lib/Dialect/Vector/TestVectorTransforms.cpp

struct TestVectorMultiReductionLoweringPatterns
   }
 };
 
 struct TestVectorTransferCollapseInnerMostContiguousDims
     : public PassWrapper<TestVectorTransferCollapseInnerMostContiguousDims,
                          FunctionPass> {
   TestVectorTransferCollapseInnerMostContiguousDims() = default;
   TestVectorTransferCollapseInnerMostContiguousDims(
-      const TestVectorTransferCollapseInnerMostContiguousDims &pass)
-      : PassWrapper(pass) {}
+      const TestVectorTransferCollapseInnerMostContiguousDims &pass) = default;
 
   void getDependentDialects(DialectRegistry &registry) const override {
     registry.insert<memref::MemRefDialect, AffineDialect>();
   }
 
   StringRef getArgument() const final {
     return "test-vector-transfer-collapse-inner-most-dims";
   }