[Bug c/111454] ice in get_nonzero_bits

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111454

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> This is either a dup of bug 111435 or bug 111442

Plausible. I saw the following strange behaviour:

$ ~/gcc/results/bin/gcc -c  -O1  bug958B.c
gcc: internal compiler error: Segmentation fault signal terminated program cc1
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
$ ~/gcc/results/bin/gcc -c  -O2  bug958B.c
$ 

Reduced code is

int g_3202, func_1_l_4;
int safe_div_func_int16_t_s_s(short si1, short si2) { return si2 || si1 / si2;
}
short(safe_rshift_func_int16_t_s_s)();
void func_1() __attribute__((optimize("-O2")));
void func_1() {
  g_3202 = 5;
  for (; g_3202;) {
    func_1_l_4 = safe_rshift_func_int16_t_s_s();
    break;
  }
  safe_div_func_int16_t_s_s(0 != 2, func_1_l_4);
}