[Bug target/68273] [5/6 Regression] Wrong code on mips/mipsel due to (invalid?) peeking at alignments in function_arg.

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68273

--- Comment #17 from Jeffrey A. Law <law at redhat dot com> ---
I've got enough state on this BZ and remember just enough MIPS that I can
verify behaviour with a cross.