* expr.c (expand_expr_real_1): Do not expand operand #1 and #2

	* expr.c (expand_expr_real_1): Do not expand operand #1 and #2
	of BIT_FIELD_REF for ignored results.
	* fold-const.c (fold_ternary_loc) <BIT_FIELD_REF>: Check that the
	CONSTRUCTOR has vector type before using vector accessors on it.
	* gimplify.c (gimplify_compound_lval): Do not gimplify operand #1 and
	#2 of BIT_FIELD_REF.
	(gimplify_expr) <BIT_FIELD_REF>: Likewise.
	* tree-nested.c (convert_nonlocal_reference_op) <BIT_FIELD_REF>: Do
	not process operand #1 and #2.
	(convert_local_reference_op): Likewise.
	* tree-ssa-pre.c (create_component_ref_by_pieces_1): Remove superfluous
	breaks throughout.
	<BIT_FIELD_REF>: Reuse operand #1 and #2 directly.
	* tree.c (stabilize_reference) <BIT_FIELD_REF>: Do not stabilize
	operand #1 and #2.
	(UPDATE_FLAGS): Do not consider operand #2 of BIT_FIELD_REF.
	(build6_stat): Delete.
	* tree.h (build6_stat, build6, build6_stat_loc, build6_loc): Likewise.
ada/
	* gcc-interface/utils2.c (gnat_stabilize_reference) <BIT_FIELD_REF>: Do
	not stabilize operand #1 and #2.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@189864 138bc75d-0d04-0410-961f-82ee72b054a4