* tree.c (integer_zerop): Ignore TREE_CONSTANT_OVERFLOW.
	(integer_onep): Likewise.
	(integer_all_onesp): Likewise.
	(integer_pow2p): Likewise.
	(integer_nonzerop): Likewise.
	(real_zerop): Likewise.
	(real_onep): Likewise.
	(real_twop): Likewise.
	(real_minus_onep): Likewise.
	(int_size_in_bytes): Likewise.
	(host_integerp): Likewise.

From-SVN: r112980