PR tree-optimization/65533
	* tree-vect-slp.c (vect_build_slp_tree): Before re-trying
	with swapped operands, call vect_free_slp_tree on
	SLP_TREE_CHILDREN of child and truncate the SLP_TREE_CHILDREN
	vector.

	* gcc.dg/pr65533.c: New test.

From-SVN: r221622