The UserManual states wrongly (AFAICT) that these default are not being defined for clang-cl, whereas further up the opposite is stated:c86fe3ee0b/clang/docs/UsersManual.rst (L3375-L3382)I've chosen to follow that wording, as it's the latest related update. CC @RIscRIpt who recently touched this inb3e6ff3319CC @AaronBallman who cared about this, c.f.8fc0dcf036