[Bug middle-end/109495] Stack is used (unexpectedly) for copying on-heap objects (no problem in clang)

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109495

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
That said, the comment says

             padding that shouldn't be clobbered.  In the future we could
             replace the TREE_ADDRESSABLE check with a check that
             get_base_address needs to live in memory.  */

but maybe testing for BLKmode is enough here.  So

          && ((mode != BLKmode && !TREE_ADDRESSABLE (TREE_TYPE (exp)))