c-typeck.c (build_array_ref): Handle subscripting of vectors.

c-typeck.c (build_array_ref): Handle subscripting of vectors.

2010-10-22  Artjoms Sinkarovs <artyom.shinakroff@gmail.com>
	Andrew Pinski <pinskia@gmail.com>

	* c-typeck.c (build_array_ref): Handle subscripting of vectors.
	* doc/extend.texi: New paragraph

	c-family/
	* c-common.h (c_common_mark_addressable_vec): Declare.
	* c-common.c (c_common_mark_addressable_vec): New function.

	testsuite/
	* gcc.c-torture/execute/vector-subscript-1.c: Likewise.
	* gcc.c-torture/execute/vector-subscript-2.c: Likewise.
	* gcc.c-torture/execute/vector-subscript-3.c: New testcase.
	* gcc.dg/vector-subscript-1.c: Likewise.
	* gcc.dg/vector-subscript-2.c: Likewise.
	* gcc.dg/vector-subscript-3.c: New testcase.
	* gcc.dg/array-8.c: Adjust.

Co-Authored-By: Andrew Pinski <pinskia@gmail.com>
From-SVN: r165861