[Bug debug/100523] [11/12/13 Regression] armv8.1-m.main -fcompare-debug failure with -O -fmodulo-sched -mtune=cortex-a53

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100523

--- Comment #4 from Alex Coplan <acoplan at gcc dot gnu.org> ---
Looks like it also falls over with this testcase:

int main_j;
long x;
int main() {
  long crc = x;
  for (; main_j; main_j--)
    if (crc)
      crc = crc >> 1 ^ 20;
}

which fixes the uninitialized use