[Bug sanitizer/61095] [4.10 Regression] miscompile: tsan is broken in gcc trunk, works in 4.9

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61095

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
CCP2 does this to

  <bb 2>:
  _2 = addr_1(D) & 18446607734267707384;
  _3 = _2 * 4;
  p_4 = (long unsigned int *) _3;
  _5 = p_4 + 8;
  xxx_6 = (long unsigned int) _5;
  _7 = xxx_6 > 4123168604159;
  _8 = (int) _7;
  return _8;

but not CCP1 to

  <bb 2>:
  _2 = addr_1(D) & 18446607734267707384;
  _3 = _2 * 4;
  p_4 = (long unsigned int *) _3;
  _5 = p_4 + 8;
  xxx_6 = (long unsigned int) _5;
  _7 = xxx_6 > 4123168604159;
  _8 = (int) _7;
  return _8;

that's weird.