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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/53364] [4.7/4.8 Regression] Wrong code generation
Date: Wed, 16 May 2012 10:32:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53364

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-05-16
          Component|c++                         |tree-optimization
      Known to work|                            |4.6.3
   Target Milestone|---                         |4.7.1
     Ever Confirmed|0                           |1
      Known to fail|                            |4.7.1

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-16 10:28:58 UTC ---
Confirmed.  Reduced testcase:

extern "C" void abort (void);

template<typename _Tp>
inline const _Tp&
min(const _Tp& __a, const _Tp& __b)
{
  if (__b < __a)
    return __b;
  return __a;
}

struct A
{
  int m_x;

  explicit A(int x) : m_x(x) {}
  operator int() const { return m_x; }
};

struct B : public A
{
public:
  explicit B(int x) : A(x) {}
};

int data = 1;

int main()
{
  B b = B(10);
  b = min(b, B(data));
  if (b != 1)
    abort ();
  return 0;
}