[Bug c++/56961] stack overflow in gimplifier with volatile field

paolo.carlini at oracle dot com gcc-bugzilla@gcc.gnu.org
Thu Jun 5 12:16:00 GMT 2014


--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I think this is another manifestation of the issue discussed in cp-gimplify.c:

        /* Remove any copies of empty classes.  We check that the RHS
           has a simple form so that TARGET_EXPRs and non-empty
           CONSTRUCTORs get reduced properly, and we leave the return
           slot optimization alone because it isn't a copy (FIXME so it
           shouldn't be represented as one).

           Also drop volatile variables on the RHS to avoid infinite
           recursion from gimplify_expr trying to load the value.  */

note that it happens only when struct foo is empty...

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