[Bug tree-optimization/100817] ICE with -O2: in compute_antic, at tree-ssa-pre.c:2513

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100817

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
int a;
int bar();
void __attribute__((cold)) b ()
{
#define FOO \
for (; a;) \
for (; a >= 0;)
#define FOO1 FOO FOO FOO FOO FOO FOO FOO FOO FOO FOO
#define FOO2 FOO1 FOO1 FOO1 FOO1 FOO1 FOO1 FOO1 FOO1 FOO1 FOO1
  FOO2 FOO2 FOO2 FOO2 FOO2 FOO2
  for (; a;)
    for (; a; a += 2)
      if (bar()) return;
}

btw, for a shorter way to write