Hi, I see the problem too.
But I think it is not necessary to change the stack alignment to solve the problem. It appears to me that the code in asan_emit_stack_protection is just wrong. It uses SImode when the memory is not aligned enough for that mode. This would not happen if that code is rewritten to use get_best_mode, and by the way, even on x86_64 the emitted code is not optimal, because that target could work with DImode more efficiently. So, to fix that, it would be better to concentrate on that function, and use word_mode instead of SImode, and let get_best_mode choose the required mode. Regards Bernd Edlinger.
