[Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671

--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But if I change:
-        mutable char data;
+        mutable char data[sizeof (void *) + 2 * sizeof (bool)];
so that the union field occupies the size of some other union members, the
warning is gone, but I still see:
        add     r5, sp, #292
...
        ldm     r5, {r0, r1, r2}
...
        strb    r6, [sp, #293]