\[\left(x + y\right) \cdot z\]

↓

\[\left(y + x\right) \cdot z\]

\left(x + y\right) \cdot z

↓

\left(y + x\right) \cdot z

double f(double x, double y, double z) {
        double r968320 = x;
        double r968321 = y;
        double r968322 = r968320 + r968321;
        double r968323 = z;
        double r968324 = r968322 * r968323;
        return r968324;
}

↓

double f(double x, double y, double z) {
        double r968325 = y;
        double r968326 = x;
        double r968327 = r968325 + r968326;
        double r968328 = z;
        double r968329 = r968327 * r968328;
        return r968329;
}

Error

The X axis uses an exponential scale — Bits error versus `x`

Try it out

In
Out

Enter valid numbers for all inputs

Derivation

Initial program 0.0
\[\left(x + y\right) \cdot z\]
Final simplification0.0
\[\leadsto \left(y + x\right) \cdot z\]

Reproduce

herbie shell --seed 2019163 
(FPCore (x y z)
  :name "Text.Parsec.Token:makeTokenParser from parsec-3.1.9, B"
  (* (+ x y) z))