https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105032
--- Comment #6 from Ammar Faizi <ammarfaizi2 at gmail dot com> --- (In reply to Jakub Jelinek from comment #4) > If this is a macro that users should use in arbitrary user code, there is > another problem, if something is vectorized in the function, either using > AVX or later or -mstackrealign is used, another register is needed for the > stack realignment (DRAP register). I don't really understand about stack realignment part. So I have a question, what is another register here? Is it %ebp? If we have %ebp as a stack frame pointer, can't the compiler just use it for the realignment? I am not sure what the DRAP register really means. Googled about it, but doesn't show anything relevant.
