* tree.c (tree_vec_elt_check_failed): New function.

    * tree.c (tree_vec_elt_check_failed): New function.
        * tree.h (TREE_VEC_ELT_CHECK): New checking macro.
        (TREE_VEC_ELT): Use it.

        * tree-inline.c (optimize_inline_calls): Don't copy a
        zero-length vector.
cp:
        * search.c (dfs_push_decls): Do not try to reorder elements
        3..n of method_vec if method_vec has only two elements.
        Reverse order of two tests to avoid accessing unallocated
        memory.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@59114 138bc75d-0d04-0410-961f-82ee72b054a4