* expr.c (expand_expr_real_1) <VECTOR_CST>: For vector constants with

	* expr.c (expand_expr_real_1) <VECTOR_CST>: For vector constants with
	integer modes, attempt to directly construct an integer constant.

	* fold-const.c (native_encode_vector): Determine the size of each
	element from the vector type instead of the first vector element.

	* tree.c (build_constructor_single): Mark a CONSTRUCTOR as constant,
	if all of its elements/components are constant.
	(build_constructor_from_list): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114815 138bc75d-0d04-0410-961f-82ee72b054a4