[Bug middle-end/58742] [4.7/4.8/4.9 Regression] pointer arithmetic simplification

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58742

--- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> ---
Thanks. For reference, as noted by Jakub and confirmed by Richard, we will also
need at some point a gimple version for:

int *
fx (int *b, int *e)
{
  ptrdiff_t p = e - b;
  return b + p;
}

(or s/ptrdiff_t/long long/, etc.)