re PR middle-end/68215 (FAIL: c-c++-common/opaque-vector.c -std=c++11 (internal compiler error))

	PR middle-end/68215
	* tree-vect-generic.c (tree_vec_extract): Remove GSI parameter.
	Do not gimplify the result.
	(do_unop): Adjust call to tree_vec_extract.
	(do_binop): Likewise.
	(do_compare): Likewise.
	(do_plus_minus): Likewise.
	(do_negate): Likewise.
	(expand_vector_condition): Likewise.
	(do_cond): Likewise.

From-SVN: r231575