* tree-vect-stmts.c (vectorizable_load): For SLP without

    * tree-vect-stmts.c (vectorizable_load): For SLP without
        permutation treat the first load of the node as the first
        element in its interleaving chain.
        * tree-vect-slp.c (vect_get_and_check_slp_defs): Swap the
        operands if necessary and possible.
        (vect_build_slp_tree): Add new argument.  Allow load groups of
        any size in basic blocks.  Keep all the loads for further
        permutation check.  Use the new argument to determine if there
        is a permutation.  Update the recursive calls.
        (vect_supported_load_permutation_p): Allow subchains of
        interleaving chains in basic block vectorization.
        (vect_analyze_slp_instance): Update the call to
        vect_build_slp_tree.  Check load permutation based on the new
        parameter.
        (vect_schedule_slp_instance): Don't start from the first element
        in interleaving chain unless the loads are permuted.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@180055 138bc75d-0d04-0410-961f-82ee72b054a4