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 can defer buffer loads by ruling out potential aliasing writes.
4
5struct Bottom
6{
7    float bigArray[1024];
8
9    float bottomGetValue(int index)
10    {
11        // RWStructuredBuffer is considered to not alias with anything else.
12        // this write should not prevent deferring loading bigArray.
13        gOther[0] = 100;
14        // this write should not prevent deferring loading bigArray.
15        gSharedVar = 1;
16        // this write should not prevent deferring loading bigArray.
17        gStaticVar = 2;
18
19        // We should return the value from bigArray from a previously loaded value of `this`.
20        return bigArray[index];
21    }
22}
23
24struct Root
25{
26    Bottom bottom1;
27    Bottom bottom2;
28}
29
30uniform Root* gRoot;
31uniform RWStructuredBuffer<int> gOther;
32static int gStaticVar;
33groupshared int gSharedVar;
34
35
36RWStructuredBuffer<float> outputBuffer;
37
38[shader("compute")]
39[numthreads(1, 1, 1)]
40void compute_main(uint3 tid: SV_DispatchThreadID)
41{
42    // SPV: OpEntryPoint
43    // SPV-NOT: OpLoad %Bottom_natural
44    outputBuffer[0] = gRoot.bottom1.bottomGetValue(0);
45}