https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88464
--- Comment #8 from Moritz Kreutzer <moritz.kreutzer at siemens dot com> --- Thanks for the input and for confirming that "for conditional ones (both MASK_LOAD and MASK_STORE) the support for the cases when using a mask register rather than a vector register with mask either hasn't been done or doesn't work properly." Any idea about a possible way forward to fix or implement those? As stated above, even though I have no experience with GCC development, I'd be happy to assist to the best of my resources if at all possible.