https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69857
--- Comment #5 from ktkachov at gcc dot gnu.org --- We'd need a testcase that shows a regression resulting from this code not being run i.e. code that became worse after r197530 (or wrong code or an ICE) and is fixed by removing that "return false;". Then, a normal bootstrap and test should be enough and the change could go in as a regression fix at this stage. But finding such a testcase would not be easy, I suspect.
