------- Comment #1 from mikael at gcc dot gnu dot org 2010-09-11 16:32 ------- The patch where the transpose optimization appeared http://gcc.gnu.org/ml/gcc-patches/2005-08/msg01472.html
There is a testcase there, I will probably incorporate it into the testsuite. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45648