[Bug c/124838] __builtin_clzl(0) overoptimization even on targets with native lzcnt instruction

[xry111 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124838

--- Comment #6 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
Then this is a bug.  Hmm why replacing ctzg with ctzl and ?: seems to work for
the test case in comment 0...