[Bug target/63783] [4.9/5 Regression] [SH] Miscompilation of boolean negation on SH4 using -O2

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63783

--- Comment #14 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Created attachment 34062
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34062&action=edit
Proposed patch

I'm now testing the attached patch.