uniform half4 colorGreen, colorRed;

noinline half4 clear_blue(half4 param) {
    return param.rg0a;
}

half4 main(float2) {
    // First, pass a variable directly to `clear_blue`; the function parameter can be aliased
    // directly to `red`.
    half4 red    = colorRed;
    half4 result = clear_blue(red);

    // Now, call `clear_blue` with an expression that cannot be aliased directly onto a variable.
    // The parameter should now get dedicated slots.
    result = clear_blue(colorGreen.rgb1);
    return result;
}