[Bug c/64663] ICE at -O1 and above with -g enabled on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64663

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase -O2 -g:
void
foo (void)
{
  int a[9];
  a[-8] = 0;
}
surprisingly doesn't ICE with -7 or -9 instead of -8, ICEs again with -16. 
Will have a look.