[Bug c/46921] Lost side effect when struct initializer expression uses comma operator

[dave.pagan at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46921

Dave Pagan <dave.pagan at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Dropped side effect with    |Lost side effect when
                   |combination of statement    |struct initializer
                   |expression and struct       |expression uses comma
                   |initializer                 |operator

--- Comment #3 from Dave Pagan <dave.pagan at oracle dot com> ---
When emitting initializer elements (output_init_element), the left hand
expression of a comma operator with result size zero is not evaluated. It
should be, however, if the expression is marked as having side effects.