2013-05-14  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* fold-const.c (fold_negate_expr): Handle vectors.
	(fold_truth_not_expr): Make it static.
	(fold_invert_truthvalue): New static function.
	(invert_truthvalue_loc): Handle vectors. Do not call
	fold_truth_not_expr directly.
	(fold_unary_loc) <BIT_NOT_EXPR>: Handle comparisons.
	<TRUTH_NOT_EXPR>: Do not cast to boolean.
	(fold_comparison): Handle vector constants.
	(fold_binary_loc) <TRUTH_XOR_EXPR>: Remove redundant code.
	(fold_ternary_loc) <VEC_COND_EXPR>: Adapt more COND_EXPR optimizations.
	* tree.h (fold_truth_not_expr): Remove declaration.

gcc/testsuite/
	* g++.dg/ext/vector22.C: New testcase.
	* gcc.dg/binop-xor3.c: Remove xfail.

From-SVN: r198893