[Bug target/123870] [riscv64] ICE on vzext_vf2 and xtheadvector

[jpegqs at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123870

--- Comment #34 from Ilya Kurdyukov <jpegqs at gmail dot com> ---
Also:

6. missed optimization with some instructions when vd = vs2, GCC uses an
unnecessary copy instruction (Clang does't do this).