[Bug rtl-optimization/78085] extra sign extend if used to store in 32bit and return 64bit and the upper bits are known to be zeroed.

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78085

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
It looks like this issue has been fixed in GCC13 trunk,cltq is gone for the
first and the last function,  but i don't know which exact commit fixed it.