[Bug target/64345] [SH] Improve single bit extraction

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64345

--- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #2)
> A recent change in the middle end has triggered this:
> 
> FAIL: gcc.target/sh/pr54236-1.c scan-assembler-times negc 2
> 

I've created a new PR 67636 for this.