yum-mirror/slang

Making it easier to work with shaders

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

Yong HeEnhance buffer load specialization pass to specialize past field extracts. (#8547)e4611e2e3

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1//TEST:SIMPLE(filecheck=SPV): -target spirv -O0
2
3// Test that we are not deferring buffer loads due to potential aliasing writes.
4
5struct Bottom
6{
7    float bigArray[1024];
8
9    float bottomGetValue(int index)
10    {
11        // this write may cause data stored at gRoot to be modified,
12        // thus bigArray[index] may be different from what it was before the call to
13        // bottomGetValue. So we should not defer loading bigArray until after this write.
14        *gOther = 100; 
15
16        // We should return the value from bigArray from a previously loaded value of `this`.
17        return bigArray[index];
18    }
19}
20
21struct Root
22{
23    Bottom bottom1;
24    Bottom bottom2;
25}
26
27uniform Root* gRoot;
28uniform int* gOther;
29
30RWStructuredBuffer<float> outputBuffer;
31
32[shader("compute")]
33[numthreads(1, 1, 1)]
34void compute_main(uint3 tid: SV_DispatchThreadID)
35{
36    // SPV: OpLoad %Bottom_natural
37    outputBuffer[0] = gRoot.bottom1.bottomGetValue(0);
38}