[Bug middle-end/28831] [4.8/4.9/4.10 Regression] Aggregate copy not elided when using a return value as a pass-by-value parameter

[chip at pobox dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28831

--- Comment #24 from Chip Salzenberg <chip at pobox dot com> ---
In 4.8.2 (Ubuntu trusty), the copy is finally elided.  Good job!  But stack
space is still allocated for the copy that is not made.  So it's not all fixed.