[Bug target/66750] [4.9/5/6] Aggregate return not generated with -m32 -mregparm=3 or with -miamcu

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66750

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Yulia Koval from comment #4)
> Well, it fixes issue for -miamcu, but not for "-m32 -mregparm=3", am i right?

callee_pop_aggregate_return isn't applicable to -mregparm since
there is nothing on stack to pop.