On Wed, Nov 14, 2018 at 06:11:37AM -0600, Segher Boessenkool wrote: > It doesn't "break" anything because it currently isn't guaranteed to work > either. There is __builtin_frame_address(0) for this of course (well, > almost the same semantics, and it is actually well-defined and actually > works). Is there user code that tries to do this with a register var?
I've seen such code many times over the years, don't have time to perform
code searches for such kind of constructs now though.
Jakub
