Try with -ffreestanding. Otherwise clang is allowed to make assumptions about the behavior of "malloc". It then does the typical unsatisfying clang thing of un

Try with -ffreestanding. Otherwise clang is allowed to make assumptions about the behavior of "malloc". It then does the typical unsatisfying clang thing of unrolling and vectorizing a _lot_ with unclear benefits: https://godbolt.org/z/eG33YM7qs https://godbolt.org/z/eG33YM7qs