[Bug rtl-optimization/78911] [5/6/7 Regression] Infinite loop at -O2/O3 optimization levels while trying to compile server.c from Wine-2.0-rc2

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78911

--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
The mentioned revision is probably not probably the culprit.
Reduced test-case:

$ cat tc.i
a, b, d, e;
*c;
static interlocked_cmpxchg64 (long long *p1)
{
  __sync_val_compare_and_swap (p1, b, a);
}
get_cached_fd ()
{
  if (!c)
    return;
  e = interlocked_cmpxchg64 (&c[d]);
}

$ timeout 10 gcc -O3 -march=pentium-m -m32 -c  -fPIC -Wall  
-fno-strict-aliasing -fno-omit-frame-pointer tc.i
[triggers time-out]

Can you see it also on trunk?