------- Comment #3 from steven at gcc dot gnu dot org 2009-04-04 17:30 ------- I'm not sure how the -march=native option changes codegen behavior, but the most likely suspect is the vectorizer. Do things pass with -march=native if you don't vectorize (needs explicit -ftree-vectorize)?
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39573
