https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70094
--- Comment #2 from Robert Obryk ---
Note that this optimization can not only be applied when the parameter is a
compile-time constant. The following function can also be compiled so as not to
touch the stack:
--snip--
struct foo {
int a;
in
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: robryk at gmail dot com
Target Milestone: ---
Function baz in the code listing below gets compiled into something that writes
to the stack. This is unnecessary: one can just load the
