2014-11-18  Marc Glisse  <marc.glisse@inria.fr>

	* tree.c (element_mode, integer_truep): New functions.
	* tree.h (element_mode, integer_truep): Declare them.
	* fold-const.c (negate_expr_p, fold_negate_expr, combine_comparisons,
	fold_cond_expr_with_comparison, fold_real_zero_addition_p,
	fold_comparison, fold_ternary_loc, tree_call_nonnegative_warnv_p,
	fold_strip_sign_ops): Use element_mode.
	(fold_binary_loc): Use element_mode and element_precision.
	* match.pd: Use integer_truep, element_mode, element_precision,
	VECTOR_TYPE_P and build_one_cst. Extend some transformations to
	vectors. Simplify A/-A.

From-SVN: r217702