yum-mirror/slang

Making it easier to work with shaders

git clone https://git.yummers.dev/yum-mirror/slang

Julius IkkalaMinimal optional constraints (#7422)7349dc5cf

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1//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -shaderobj
2//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -vk -shaderobj
3//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK): -cpu -shaderobj
4
5//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0 0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<int> outputBuffer;
7
8interface IThing
9{
10    [mutating]
11    int thing(int index);
12}
13
14struct MyThing: IThing
15{
16    int val;
17
18    [mutating]
19    int thing(int index)
20    {
21        val++;
22        outputBuffer[index] = val;
23        return val;
24    }
25}
26
27struct NotMyThing
28{
29    int val;
30}
31
32void f<T>(inout T t, int index) where optional T: IThing
33{
34    if (T is IThing)
35    {
36        outputBuffer[index+1] = 2 * t.thing(index);
37    }
38    else
39    {
40        outputBuffer[index] = 0;
41        outputBuffer[index+1] = 0;
42    }
43}
44
45[numthreads(1, 1, 1)]
46void computeMain(int3 dispatchThreadID: SV_DispatchThreadID)
47{
48    MyThing mt = MyThing(0);
49    NotMyThing nt = NotMyThing(1);
50
51    // CHECK: 1
52    // CHECK-NEXT: 2
53    f<MyThing>(mt, 0);
54    // CHECK-NEXT: 0
55    // CHECK-NEXT: 0
56    f<NotMyThing>(nt, 2);
57    // CHECK: 2
58    // CHECK-NEXT: 4
59    f(mt, 4);
60    // CHECK-NEXT: 0
61    // CHECK-NEXT: 0
62    f(nt, 6);
63}