[Bug c/83855] [performance] Improve cse optimization for insn with inout ops

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83855

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 83854 has been marked as a duplicate of this bug. ***