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/* { dg-do run } */

/* { dg-options "-O -finline-functions -fstrict-aliasing" } */

template 

struct const_ref

{

  const T* begin;

  const_ref(const T* b) : begin(b) {}

};

template 

T sum(const_ref const& a)

{

  T result = 0;

  for(unsigned i=0;i<1;i++) result += a.begin[i];

  return result;

}

struct tiny_plain

{

  int elems[2];

  tiny_plain() { elems[0]=1; }

};

struct vec3 : tiny_plain {};

struct mat3

{

  int type() const { return sum(const_ref(vec3().elems)) == 1; }

};

int main() { return mat3().type() ? 0 : 1; }