beware of NaN's

[r21405]

diff --git a/ir/stat/const_stat.c b/ir/stat/const_stat.c
index 4fd5b20..7ff898a 100644 (file)
--- a/ir/stat/const_stat.c
+++ b/ir/stat/const_stat.c
@@ -72,7 +72,7 @@ static float_classify_t classify_float_value(tarval *tv) {
                return STAT_FC_1;
        else if (tv == get_mode_one(mode))
                return STAT_FC_1;
-       else if (tarval_ieee754_zero_mantissa(tv)) {
+       else if (tarval_is_finite(tv) && tarval_ieee754_zero_mantissa(tv)) {
                int exp = tarval_ieee754_get_exponent(tv);
 
                if (exp == 1)