[Bug rtl-optimization/104059] [12 Regression] cprop_hardreg propgates hard registers for mov instructions between different REG_CLASS without considering cost

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104059

--- Comment #6 from Hongtao.liu <crazylht at gmail dot com> ---
A patch is posted at
https://gcc.gnu.org/pipermail/gcc-patches/2022-January/589209.html