* gimple-low.c (struct lower_data): New field encl_switch_body.

	* gimple-low.c (struct lower_data): New field encl_switch_body.
	(lower_case_label_expr): New.
	(lower_stmt_body, lower_stmt, lower_switch_expr): Handle switch_expr
	lowering.
	* tree-cfg.c (CASE_END, CASE_NEXT_RAW): Removed.
	(CASE_GOTO, CASE_NEXT, CASE_DESTINATION, CASE_CASE, CASE_EDGE): Work
	over tree_stmt_iterators.
	(CASE_START): New.
	(make_switch_expr_edges, tree_redirect_edge_and_branch,
	find_taken_edge_switch_expr, tree_cleanup_block_edges,
	remove_superfluous_labels): Use tree_stmt_iterator for switch cases.
	(build_new_label): Moved ...
	* gimplify.c (build_new_label): ...here.
	(build_and_jump): Use it.
	* tree-flatten.c (tree_flatten_statement): Assume SWITCH_EXPRs are
	lowered.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/tree-ssa-cfg-branch@72127 138bc75d-0d04-0410-961f-82ee72b054a4