[Bug tree-optimization/123588] [16 regression] Clang miscompiled since r16-6133

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123588

--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Inside getArgLength, right before the for loop does adding:
```
#pragma GCC novector
```

allow for the code to work?