[Bug target/84762] GCC for PowerPC32 violates the SysV ABI spec for small struct returns

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84762

--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I reopened PR85123 for the regression.  Let's keep this bug for purely
the SYSV ABI non-compliance.  This is not a regression (it is ancient).