jittery/bugs/JDK-8349364.java at master · EngineeringSoftware/jittery · GitHub

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public class Test1 {
    public static double test(final double a1, final double b1, final double a2, final double b2) {
        final double x = Double.longBitsToDouble(
                Double.doubleToRawLongBits((double) a1) & (long) (8411500938693120034L << -173714142));
        final double y = (double) ((x + b1) / (((x * (b1 % x)) % (x - a1)) - (b1 - x)));
        // Adding this if statement makes C1 fast
        if (Double.isNaN(a1)) {
            System.out.println("a1 is NaN");
        }
        return (double) a2;
    }
    public static void main(String[] args) {
        int N = 10000000;
        double[] res = new double[N];
        for (int i = 0; i < N; ++i) {
            res[i] = test((double) 'a', 100, 10L, 100.0d);
        }
    }
}

public class Test2 {
    public static double test(final double a1, final double b1, final double a2, final double b2) {
        final double x = Double.longBitsToDouble(
                Double.doubleToRawLongBits((double) a1) & (long) (8411500938693120034L << -173714142));
        final double y = (double) ((x + b1) / (((x * (b1 % x)) % (x - a1)) - (b1 - x)));
        return (double) a2;
    }
    public static void main(String[] args) {
        int N = 10000000;
        double[] res = new double[N];
        for (int i = 0; i < N; ++i) {
            res[i] = test((double) 'a', 100, 10L, 100.0d);
        }
    }
}