[Bug target/105666] RISC-V 507.cactuBSSN_r build has costly FMV instructions

[vineet.gupta at linux dot dev]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105666

--- Comment #3 from Vineet Gupta <vineet.gupta at linux dot dev> ---
https://gcc.gnu.org/pipermail/gcc-patches/2022-May/595428.html