[Bug target/71571] [CRIS] Multiple inheritance non-virtual PIC thunk causes crash

[gcc at davidrobins dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71571

--- Comment #7 from David B. Robins <gcc at davidrobins dot net> ---
I have verified that the pr71571.C test case attached does expose the bug on
trunk and that it passes with the above fix. (Note "-O2 -fno-inline" are
required to ensure a crash; see earlier comment; in 4.3.1 "-O2" sufficed,
either because it did not inline these thunks or used different criteria.)