llvm-project/clang/test/CoverageMapping/classtemplate.cpp

// RUN: %clang_cc1 -triple %itanium_abi_triple -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name classtemplate.cpp %s > %tmapping
// RUN: FileCheck -input-file %tmapping %s --check-prefix=CHECK-CONSTRUCTOR
// RUN: FileCheck -input-file %tmapping %s --check-prefix=CHECK-GETTER
// RUN: FileCheck -input-file %tmapping %s --check-prefix=CHECK-SETTER

template<class TT>
class Test {
public:
  enum BaseType {
    A, C, G, T, Invalid
  };
  const static int BaseCount = 4;
  double bases[BaseCount];

                                        // CHECK-CONSTRUCTOR: _ZN4TestIjEC
  Test() { }                            // CHECK-CONSTRUCTOR: File 0, [[@LINE]]:10 -> [[@LINE]]:13 = #0

  // FIXME: It would be nice to emit no-coverage for get, but trying to do this
  // runs afoul of cases like Test3::unmangleable below.
                                        // FIXME-GETTER: _ZNK4TestIjE3get
  double get(TT position) const {       // FIXME-GETTER: File 0, [[@LINE]]:33 -> [[@LINE+2]]:4 = 0
    return bases[position];
  }
                                        // CHECK-SETTER: _ZN4TestIjE3set
  void set(TT position, double value) { // CHECK-SETTER: File 0, [[@LINE]]:39 -> [[@LINE+2]]:4 = #0
    bases[position] = value;
  }
};

class Test2 {
                                        // CHECK-CONSTRUCTOR: _ZN5Test2C
  Test2() { }                           // CHECK-CONSTRUCTOR: File 0, [[@LINE]]:11 -> [[@LINE]]:14 = 0
                                        // CHECK-GETTER: _ZNK5Test23get
  double get(unsigned position) const { // CHECK-GETTER: File 0, [[@LINE]]:39 -> [[@LINE+2]]:4 = 0
    return 0.0;
  }
};

// Test3::unmangleable can't be mangled, since there isn't a complete type for
// the __is_final type trait expression. This would cause errors if we try to
// emit a no-coverage mapping for the method.
template <class T, bool = __is_final(T)> class UninstantiatedClassWithTraits {};
template <class T> class Test3 {
  void unmangleable(UninstantiatedClassWithTraits<T> x) {}
};

int main() {
  Test<unsigned> t;
  t.set(Test<unsigned>::A, 5.5);
  t.set(Test<unsigned>::T, 5.6);
  t.set(Test<unsigned>::G, 5.7);
  t.set(Test<unsigned>::C, 5.8);
  return 0;
}