[Bug c++/122772] [13/14/15/16 Regression] Bit-field expressions resulting from assignment operators and comma operators are incorrectly rejected when used as the first operand of a compound assignment operator since r7-1689

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122772

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Though maybe it can be just handled by multiple separate SAVE_EXPRs.
One of these extended cp_stabilize_exprs on (baz ().y = foo ()) subexpression,
one on
(qux ().z = foo ()) and if needed, save_expr on the condition.