text: // RUN: %clang_cc1 -triple armv7-none-eabi -emit-llvm -o - %s | FileCheck %s
  
  struct A { int x; A(int); ~A(); };
  A f() { return A(0); }
  // CHECK-LABEL: define void @_Z1fv
  // CHECK: call {{.*}} @_ZN1AC1Ei
  // CHECK-NEXT: ret void
  
  // Verify that we do not elide copies when constructing a base class.
  namespace no_elide_base {
    struct Base { 
      Base(const Base&);
      ~Base();
    };
  
    struct Other {
      operator Base() const;
    };
  
    struct Derived : public virtual Base { 
      Derived(const Other &O);
    };
  
    // CHECK: define {{.*}} @_ZN13no_elide_base7DerivedC1ERKNS_5OtherE(%"struct.no_elide_base::Derived"* returned %this, %"struct.no_elide_base::Other"* nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) %O) unnamed_addr
    Derived::Derived(const Other &O) 
      // CHECK: call {{.*}} @_ZNK13no_elide_base5OthercvNS_4BaseEEv
      // CHECK: call {{.*}} @_ZN13no_elide_base4BaseC2ERKS0_
      // CHECK: call {{.*}} @_ZN13no_elide_base4BaseD1Ev
      : Base(O)
    {
      // CHECK: ret
    }
  }
  
  // PR8683.
  
  namespace PR8683 {
  
  struct A {
    A();
    A(const A&);
    A& operator=(const A&);
  };
  
  struct B {
    A a;
  };
  
  void f() {
    // Verify that we don't mark the copy constructor in this expression as elidable.
    // CHECK: call {{.*}} @_ZN6PR86831AC1ERKS0_
    A a = (B().a);
  }
  
  }
  
  namespace PR12139 {
    struct A {
      A() : value(1) { }
      A(A const &, int value = 2) : value(value) { }
      int value;
  
      static A makeA() { A a; a.value = 2; return a; }
    };
  
    // CHECK-LABEL: define i32 @_ZN7PR121394testEv
    int test() {
      // CHECK: call void @_ZN7PR121391A5makeAEv
      // CHECK-NEXT: call %"struct.PR12139::A"* @_ZN7PR121391AC1ERKS0_i
      A a(A::makeA(), 3);
      // CHECK-NEXT: getelementptr inbounds
      // CHECK-NEXT: load
      // CHECK-NEXT: ret i32
      return a.value;
    }
  }
  
  namespace ElidableCallIsNotCopyCtor {
    struct A { A(const A&); };
    struct B : A {
      B(B&);
      B(A);
      B(int);
    };
    void f() {
      // Here, we construct via B(int) then B(A). The B(A) construction is
      // elidable, but we don't have an AST representation for the case where we
      // must elide not only a constructor call but also some argument
      // conversions, so we don't elide it.
      // CHECK-LABEL: define void @_ZN25ElidableCallIsNotCopyCtor1fEv(
      // CHECK: call {{.*}} @_ZN25ElidableCallIsNotCopyCtor1BC1Ei(
      // CHECK: call {{.*}} @_ZN25ElidableCallIsNotCopyCtor1AC1ERKS0_(
      // CHECK: call {{.*}} @_ZN25ElidableCallIsNotCopyCtor1BC1ENS_1AE(
      B b = 0;
    }
  }
  