uniform half4 colorGreen, colorRed;

half4 main() {
  const float4 a = float4(0);
  const float4 b = float4(1);
  // This is a constant-expression in GLSL, but not in SkSL (yet).
  // We can't declare this const, and we can't eliminate it. skbug.com/10835
  /*const*/ float4 c = abs(b);
  if (a == b || b != c) {
      return colorRed;
  } else {
      return colorGreen;
  }
}