Apparently not. At the gcc page you linked: Example output using -ftree-vectorizer-verbose=2: vect-1.c:82: note: not vectorized, possible dependence between

Apparently not. At the gcc page you linked: Example output using -ftree-vectorizer-verbose=2: vect-1.c:82: note: not vectorized, possible dependence between data-refs a[i_124] and a[i_83] Apple's patented method would appear to allow vectorization in this case, whereas gcc fails.