https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105782
--- Comment #2 from Koakuma <koachan+gccbugs at protonmail dot com> --- Created attachment 53066 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53066&action=edit Vectorization log from -fopt-info-vec-all (In reply to Richard Biener from comment #1) > You can check -fopt-info-vec for vectorization. I tried recompiling it with -fopt-info-vec-all and I got a long message that ends with: > blake2b-monocypher-standalone.c:75:18: note: Cost model analysis: > blake2b-monocypher-standalone.c:75:18: note: Cost model analysis for part in > loop 0: > Vector cost: 2282 > Scalar cost: 181 > blake2b-monocypher-standalone.c:75:18: missed: not vectorized: vectorization > is not profitable. So I dont think that GCC vectorized that function. Also, I tried recompiling with -fno-tree-optimize and it doesn't improve anything. Seems like the problem isn't in the vectorizer? (it still produces the same slow code with many `movxtod`/`movdtox`s)
