GIMPLE clobber statement

[Jason Merrill]

The clobber means that 'a' no longer has a value, presumably because it has
gone out of scope.

On Tue, Jul 16, 2019, 2:07 PM navya deepika Garakapati <
navyadeepika.garakapati@gmail.com> wrote:

> 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.
>