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# 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)) {
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
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