[Bug tree-optimization/106888] [RISCV] Negative optimization that excess andi instructions are generated in gcc.dg/pr90838.c

[law at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106888

--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> ---
So coming back to this after a couple months, I'm confident the match.pd change
is unnecessary and in fact wrong.  So we definitely want to set that aside.