------- Comment #5 from dorit at gcc dot gnu dot org 2007-07-15 19:02 ------- (In reply to comment #4) > The arrays in this example all have compatible alignment. This is one of the > advantages many compilers see in the use of the "old-fashioned" block COMMON. > In the usual case lft==1 all arrays in COMMON are aligned, with the size > declarations given here. So it is undesirable to split the loop to handle > alignment.
ah, ok. so the real issue here is to make the vectorizer notice that all these accesses have the same alignment (we have a way in the vectorizer to mark accesses that have the same alignment even if the alignment itself is unknown). to be continued... -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32380
