[Bug tree-optimization/112536] [14 regression] ICE when building xorg-server on arm64 (internal compiler error: in vect_slp_analyze_node_operations, at tree-vect-slp.cc:6378) since r14-5435-g7383cb56e11707

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112536

--- Comment #11 from Sam James <sjames at gcc dot gnu.org> ---
Reduced from llvm:
```
void swap() {
  unsigned Defs, Kills;
  while (Kills && Defs) {
    int __trans_tmp_3 = __builtin_ctz(Kills);
    unsigned KReg = __builtin_ctz(Defs), DReg = __trans_tmp_3;
    swap();
    Kills &= ~(1 << KReg);
    Defs &= ~(1 << DReg);
  }
}
```