[Bug target/111778] PowerPC constant code change uses an undefined shift

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111778

--- Comment #2 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
Thanks so much for reporting this issue, and thanks for tracing down it!

For the code, if 'lz' is 0, it is correct to return false.