[Bug rtl-optimization/78638] [7 regression] test cases gcc.target/powerpc/rlwimi-0.c and rlwimi-2.c fail starting with r243000

[seurer at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78638

--- Comment #3 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
Also on power6...