* tree-vect-slp.c (vect_free_slp_tree): Also free SLP_TREE_CHILDREN
vector.
(vect_create_new_slp_node): Don't allocate node before checking stmt
type.
(vect_free_oprnd_info): Remove FREE_DEF_STMTS argument, always
free def_stmts vectors and additionally free oprnd_info.
(vect_build_slp_tree): Adjust callers. Call it even if
stop_recursion. If vect_create_new_slp_node or
vect_build_slp_tree fails, properly handle freeing memory.
If it succeeded, clear def_stmts in oprnd_info.
From-SVN: r181281
