Convert forced_labels from an EXPR_LIST to an INSN_LIST

Convert forced_labels from an EXPR_LIST to an INSN_LIST

gcc/
2014-08-28  David Malcolm  <dmalcolm@redhat.com>

	* function.h (struct expr_status): Convert field "x_forced_labels"
	from rtx_expr_list * to rtx_insn_list *.

	* cfgbuild.c (make_edges): Convert local "x" from an
	rtx_expr_list * to an rtx_insn_list *, replacing use of
	"element" method with "insn" method.
	* dwarf2cfi.c (create_trace_edges): Likewise for local "lab".
	* except.c (sjlj_emit_dispatch_table): Replace use of
	gen_rtx_EXPR_LIST with gen_rtx_INSN_LIST when prepending to
	forced_labels.
	* jump.c (rebuild_jump_labels_1): Convert local "insn" from an
	rtx_expr_list * to an rtx_insn_list *, replacing use of
	"element" method with "insn" method.
	* reload1.c (set_initial_label_offsets): Likewise for local "x".
	* stmt.c (label_rtx): Strengthen local "ref" from rtx to
	rtx_insn *, adding a checked cast.  Replace use of
	gen_rtx_EXPR_LIST with gen_rtx_INSN_LIST when prepending it to
	forced_labels.
	(expand_label): Likewise for local "label_r".

From-SVN: r214688