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

[rguenth at gcc dot gnu.org]

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

--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing of the tree-ssanames.c change went ok on x86_64, can somebody see
whether this fixes the testcase on mips?