------- Comment #3 from ubizjak at gmail dot com 2009-09-25 17:33 ------- (In reply to comment #2) > Even if it thinks the arrays aren't aligned, that doesn't explain the > completely unnecessarily zeroing of XMM0 or the choice of the load high/low > instructions over MOVUPS.
This is by design, see config/i386/i386.c, ix86_expand_vector_move_misalign and the comment above this function. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41464
