[Bug target/127393] [17 Regression] ICE: in gen_highpart, at emit-rtl.cc:1673 at -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127393

--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Fixed on trunk, but the fundamental issue is present in all maintained
releases.  So needs backport.