yum-mirror/slang

Making it easier to work with shaders

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Gangzheng TongCheck if debugVar for is debuggable types in the legalization pass (#8326)2020a102e

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1//TEST:SIMPLE(filecheck=CHECK):-target spirv -entry main -stage compute -g2 -emit-spirv-directly
2
3// Test for debug variable handling with generic parameters and structs containing resources
4// This test ensures that structs containing StructuredBuffer fields don't get invalid DebugVar instructions
5
6StructuredBuffer<uint4> gData;
7
8interface IGeometryReader
9{
10    float4 read(uint attributeIndex);
11}
12
13struct PositionReader : IGeometryReader
14{
15    float4 read(uint vertexIndex)
16    {
17        return m_geometryBuffer[vertexIndex];
18    }
19
20    __init(StructuredBuffer<uint4> geometryBuffer)
21    {
22        m_geometryBuffer = geometryBuffer;
23    }
24
25    StructuredBuffer<uint4> m_geometryBuffer;
26}
27
28float4 test<Reader: IGeometryReader>(Reader reader)
29{
30    float4 pos = reader.read(0);
31    return pos;
32}
33
34RWStructuredBuffer<float4> result;
35
36[numthreads(1,1,1)]
37void main()
38{
39    let reader = PositionReader(gData);
40    float4 pos = test(reader);
41    
42    result[0] = pos;
43}
44
45// Verify that debug info is generated but no invalid DebugVar for struct with StructuredBuffer
46// CHECK: OpExtInst %void {{.*}} DebugExpression
47
48// Ensure we have the expected legitimate debug variables
49// CHECK: pos{{.*}}DebugLocalVariable{{.*}}
50// CHECK: vertexIndex{{.*}}DebugLocalVariable{{.*}}
51
52// After legitimate debug vars, ensure we don't create debug vars for non-debuggable types
53// Specifically check that we don't create debug vars for variables containing StructuredBuffer:
54// - No debug var for 'reader' (PositionReader struct instance)
55// - No debug var for 'm_geometryBuffer' (StructuredBuffer field)
56// The absence of these variables in the output proves the fix is working
57// CHECK-NOT: reader{{.*}}DebugLocalVariable{{.*}}
58// CHECK-NOT: m_geometryBuffer{{.*}}DebugLocalVariable{{.*}}
59// CHECK-NOT: geometryBuffer{{.*}}DebugLocalVariable{{.*}}
60
61// Verify the function ends properly
62// CHECK: OpFunctionEnd