https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121662
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Richard Biener from comment #3) > I remember we run into this issue in SPEC somewhere where an outer loop > repeatedly triggers fault suppression on a masked store in an inner > vectorized > loop. The code in the vectorizer was contributed by Intel IIRC. > > Note fault suppression also happens for paging, not only for actual access > violations. The classical fault is COW of the zero page after allocation btw. And all this is also a reason for aggressively aligning masked stores so that partially masked stores do not trigger the same issue (we don't do such aggressive aligning or prioritizing of aligning of masked stores).
