> The aliaser is fairly aggressive at removing TREE_ADDRESSABLE from > variables that do not need it anymore, so that should not be a problem.
Yes, but you're calling the lang hook, which in theory, is allowed to do all sorts of different things. How do those get undone when we find *they* aren't needed? Moreover, what if what you're taking the address of is a COMPONENT_REF or some such. Are we saying that's not allowed anymore? Some lang-hooks look through them to set TREE_ADDRESSABLE on the underlying decl, but your patch only calls it on a DECL_P. I think we need to step back a bit and get a definition we can all agree on here first.
