[Bug target/117182] [SH] LRA changes fp-move insn alternative without validating fp-mode-switching state

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117182

--- Comment #8 from Oleg Endo <olegendo at gcc dot gnu.org> ---
PR 115948 seems to be hitting the same or similar case, even without LRA. 
Perhaps because nothing ever validates any insn changes for mode-switching
after mode-switching.cc has initially placed the mode-set insns.