GIMPLE clobber statement

[navya deepika Garakapati]

Hi everyone,

We are investigating the optimization issue with GCC trunk code and we have
the below gimple code like

  a = 1;
  __asm__ __volatile__("");
  _9 = &a;
  a ={v} {CLOBBER};
  _4 = _9;
  _1 = *_4;
 std::basic_ostream<char>::operator<< (&cout, _1);


in the above gimple statements ,we would like to know the semantics of  "a
={v} {CLOBBER}" and how this is interpreted by optimization ?



Thank you
Navya.