# This tests that we do not unroll a loop in error thinking we know the max
# trip count due to the induction variable being uint. i.e The max trip count
# here is 4294967295 with this test we are making sure the compiler doesn't
# mistakenly think the trip count is 4.
[require]
GLSL >= 1.20

[vertex shader]
#version 130

uniform uint induction_init;

void main()
{
  gl_Position = gl_Vertex;

  vec4 colour = vec4(1.0, 1.0, 1.0, 1.0);
  vec4 colour2 = vec4(0.0, 0.0, 0.0, 1.0);

  uint j = 0u;
  uint i = induction_init;
  while (true) {

     if (j > 4u) {
        colour = vec4(1.0, 0.0, 0.0, 1.0);
     }

     if (3u < i) {

     } else {
        break;
     }

     colour = vec4(0.0, 1.0, 0.0, 1.0);

     i++;
     j++;
  }

  gl_FrontColor = colour + colour2;
}

[fragment shader]
void main()
{
  gl_FragColor = gl_Color;
}

[test]
clear color 0.5 0.5 0.5 0.5

# unit_max 4294967295

# induction_init equivalent to starting at int -5
uniform uint induction_init 4294967291
draw rect -1 -1 2 2
probe all rgba 1.0 0.0 0.0 1.0

# induction_init equivalent to starting at int -3
uniform uint induction_init 4294967293
draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 1.0

uniform uint induction_init 0
draw rect -1 -1 2 2
probe all rgba 1.0 1.0 1.0 1.0