* tree.def (VIEW_CONVERT_EXPR): New tree code.

	* tree.def (VIEW_CONVERT_EXPR): New tree code.
	* tree.h (handled_component_p): New declaration.
	* alias.c (handled_component_p): Move function from here ...
	* expr.c (handled_component_p): ... to here and non longer static.
	(is_zeros_p, case VIEW_CONVERT_EXPR): New case.
	(store_field): Remove unneeded MEM_COPY_ATTRIBUTES call.
	(get_inner_reference): Handle VIEW_CONVERT_EXPR.
	(expand_expr, case VAR_DECL): Clean up handling of re-layout case.
	(expand_expr, case VIEW_CONVERT_EXPR): New case.
	(expand_expr, cse ADDR_EXPR): No need to copy if already
	BIGGEST_ALIGNMENT.
	* fold-const.c (fold, case VIEW_CONVERT_EXPR): New case.
	* varasm.c (initializer_constant_value_p, case VIEW_CONVERT_EXPR): New.
	(output_constant): Handle VIEW_CONVERT_EXPR.
	* dwarf2out.c (loc-descriptor_from_tree, add_bound_info):
	Add new case for VIEW_CONVERT_EXPR.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@47179 138bc75d-0d04-0410-961f-82ee72b054a4