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// { dg-do compile }

// { dg-options "-O2 -fstrict-aliasing -fdump-tree-optimized" }

// Test that placement new does not introduce an unnecessary memory

// barrier.

// See PR 29286.

typedef __SIZE_TYPE__ size_t;

inline void* operator new(size_t, void* __p) throw() { return __p; }

template 

class Vector

{

public:

   Vector()

   {

     for (int i = 0; i < D; ++i)

        new (&x_m[i]) T();

   }

   T& operator[](int i) { return x_m[i]; }

private:

   T x_m[D];

};

void foo(Vector *m)

{

  Vector v;

  v[0] = 1.0;

  v[1] = 2.0;

  v[3] = 3.0;

  *m = v;

}

// { dg-final { scan-tree-dump-times "= 0\.0" 1 "optimized" } }

// { dg-final { cleanup-tree-dump "optimized" } }