https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112949
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Oh the definition of __builtin_clz does not have return value so the value is undefined to begin with.
pinskia at gcc dot gnu.org via Gcc-bugs Sun, 10 Dec 2023 15:11:19 -0800
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112949
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Oh the definition of __builtin_clz does not have return value so the value is undefined to begin with.