[Bug c++/120247] __builtin_assoc_barrier and binding to a reference type

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120247

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
PAREN_EXPR should behave like NON_LVALUE_EXPR, aka it produces an rvalue.