exp_attr.adb (Expand_N_Attribute_Reference): Apply a predicate check when evaluating...

exp_attr.adb (Expand_N_Attribute_Reference): Apply a predicate check when evaluating the attribute Valid...

2012-11-06  Gary Dismukes  <dismukes@adacore.com>

	* exp_attr.adb (Expand_N_Attribute_Reference): Apply a predicate
	check when evaluating the attribute Valid, and issue a warning
	about infinite recursion when the check occurs within the
	predicate function of the prefix's subtype.
	* exp_ch4.adb (Expand_N_In): Remove test for Is_Discrete_Type
	when we're checking that there's no predicate check function as a
	condition for substituting a Valid check for a scalar membership
	test (substitution should be suppressed for any kind of scalar
	subtype with a predicate check). Also, don't emit a predicate
	check when the right operand is a range.

From-SVN: r193228