[Bug middle-end/112909] [14 Regression] glibc -Wuninitialized build failure for i686-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112909

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Reduced testcase:

struct machine_thread_all_state {
  int set;
} _hurd_setup_sighandler_state;
int _hurd_setup_sighandler_ss_0;
struct {
  int ctx;
} *_hurd_setup_sighandler_stackframe;
void _setjmp();
void __thread_get_state();
int machine_get_basic_state(struct machine_thread_all_state *state) {
  if (state->set)
    __thread_get_state();
  return 1;
}
int *_hurd_setup_sighandler() {
  int *scp;
  if (_hurd_setup_sighandler_ss_0) {
    _setjmp();
    _hurd_setup_sighandler_state.set |= 5;
  }
  machine_get_basic_state(&_hurd_setup_sighandler_state);
  scp = &_hurd_setup_sighandler_stackframe->ctx;
  _setjmp();
  return scp;
}