[Bug bootstrap/83396] [8 Regression] Bootstrap failures with Statement Frontiers

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83396

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase for AIX, -O2 -gdwarf-4 (both C and C++):

int fn1 (void);
void fn2 (void *, const char *);
void fn3 (void);

void
fn4 (long long x)
{
  fn3 ();
}

void
fn5 (long long x)
{
  if (x)
    fn3();
}

void
fn6 (long long x)
{
  switch (fn1 ())
    {
    case 0:
      fn5 (x);
    case 2:
      fn2 (0, "");
      break;
    case 1:
    case 3:
      fn4(x);
    case 5:
      fn2 (0, "");
    }
}