pseudo loops with function

[vitalij]

In the following example

  model A
    function f2
      input Real dx1;
      input Real dx2;
      input Real x1;
      input Real x2;
      output Real y1;
      output Real y2;
    protected 
      Real[2] c = {dx1 + dx2, x1 + x2};
    algorithm 
      y1 := c[1] + c[2];
      y2 := c[2];
    end f2;

    Real x,z,y;
    Real dx = (x-y)/exp(z), dz(start=1) = der(z), dy(start=1.5) = der(y);
  equation 
    (x, z) = f2(dx, dy, x, y);
    dz = x - z;
  end A;

we have loops of the size 2.
By replace

Real[2] c = {dx1 + dx2, x1 + x2}; 

with

Real c1 = dx1 + dx2, c2 = x1 + x2;

we get

  model A2
    function f2
    input Real dx1;
    input Real dx2;
    input Real x1;
    input Real x2;
    output Real y1;
    output Real y2;
protected 
    Real c1 = dx1 + dx2, c2 = x1 + x2;
    algorithm 
    y1 := c1 + c2;
    y2 := c2;
    end f2;

    Real x,z,y;
    Real dx = (x-y)/exp(z), dz(start=1) = der(z), dy(start=1.5) = der(y);
  equation 
    (x, z) = f2(dx, dy, x, y);
    dz = x - z;
  end A2;

without loops.

[vitalij]

extends of inlining for array protected types include (currently) performence issues (see #3531)