[Piglit] [PATCH] Add glsl-1.30/execution/fs-loop-cont-else-bug

[Tapani Pälli]

On 09/29/2016 01:25 PM, Tapani Pälli wrote:
> x goes like 7 .. 22 .. 11 .. then we break out (as idx >= 3) and in the
> end 11 % 5 * 0.25 is 0.75 .. LGTM

argh not 5 but 4 so (11 % 4) * 0.25

> Reviewed-by: Tapani Pälli <tapani.palli at intel.com>
>
> On 09/28/2016 11:01 PM, Nicolai Hähnle wrote:
>> From: Nicolai Hähnle <nicolai.haehnle at amd.com>
>>
>> This is a regression test for a very specific compiler bug in radeonsi.
>>
>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97887
>> ---
>>  .../execution/fs-loop-cont-else-bug.shader_test    | 44
>> ++++++++++++++++++++++
>>  1 file changed, 44 insertions(+)
>>  create mode 100644
>> tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
>>
>> diff --git
>> a/tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
>> b/tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
>> new file mode 100644
>> index 0000000..f66c95e
>> --- /dev/null
>> +++ b/tests/spec/glsl-1.30/execution/fs-loop-cont-else-bug.shader_test
>> @@ -0,0 +1,44 @@
>> +# This test used to create bad LLVM IR in radeonsi.
>> +#
>> +# Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97887
>> +
>> +[require]
>> +GLSL >= 1.30
>> +
>> +[vertex shader passthrough]
>> +
>> +[fragment shader]
>> +#version 130
>> +
>> +uniform int initial;
>> +
>> +void main() {
>> +    int idx = 0;
>> +    int x = initial;
>> +
>> +    for (;;) {
>> +        idx++;
>> +        if (idx >= 3)
>> +            break;
>> +
>> +        if (x % 2 == 0) {
>> +            x = x / 2;
>> +            if (x == 18)
>> +                break;
>> +            continue;
>> +        } else {
>> +            x = x * 3;
>> +        }
>> +        x++;
>> +    }
>> +
>> +    gl_FragColor = vec4(0.0, (x % 4) * 0.25, 0.0, 1.0);
>> +}
>> +
>> +[test]
>> +clear color 1.0 0.0 0.0 1.0
>> +clear
>> +
>> +uniform int initial 7
>> +draw rect -1 -1 2 2
>> +probe all rgba 0.0 0.75 0.0 1.0
>>
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