------- Comment #11 from jakub at gcc dot gnu dot org 2010-07-15 16:28 ------- That is going to break the ABI a lot. You'd e.g. change long double passing for -m64. What you IMHO want is to do what the code currently does, and if the alignment after that is 32 bytes, use a predicate similar to contains_aligned_value_p which would look for 256 bit vectors instead of 128 bit ones.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44948
