Fix floating point bug in fold_range.

We currently do not have any floating point operators where operand 1 is
a different type than the LHS. When we eventually do there is a bug
in fold_range. If either operand is a known NAN, it returns a NAN
of the type of operand 1 instead of the result type.

	* range-op-float.cc (range_operator_float::fold_range): Return
	NAN of the result type.

diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc
index a99a6b01ed835ae9755aec03b967d528b45a8c91..af598b60a790df3480d7d6bcc6868dfd82c3c69a 100644 (file)
--- a/gcc/range-op-float.cc
+++ b/gcc/range-op-float.cc
@@ -57,7 +57,7 @@ range_operator_float::fold_range (frange &r, tree type,
     return true;
   if (op1.known_isnan () || op2.known_isnan ())
     {
-      r.set_nan (op1.type ());
+      r.set_nan (type);
       return true;
     }