yum-mirror/slang

Making it easier to work with shaders

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

Yong HeRewriting the lower-buffer-element-type pass to avoid unnecessary packing/unpacking. (#8526)a6deb5ed8

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1// TEST:SIMPLE(filecheck=CHECK_GLSL): -entry vertexMain -stage vertex -target glsl
2// TEST:SIMPLE(filecheck=CHECK_SPV): -entry vertexMain -stage vertex -emit-spirv-directly -target spirv
3// TEST:SIMPLE(filecheck=CHECK_SPV_VIA_GLSL): -entry vertexMain -stage vertex -emit-spirv-via-glsl -target spirv
4
5struct Inner1
6{
7    float4 position;
8    Inner2* inner;
9}
10
11struct Inner2
12{
13    float4 position;
14}
15
16struct Vertex
17{
18    float4 position;
19    Inner1* inner;
20}
21
22struct VSOutput
23{
24    float4 position : SV_Position;
25}
26
27struct PushConstants
28{
29    float a;
30    Vertex* verts;
31};
32
33[[vk::push_constant]]
34PushConstants pushConstants;
35
36ConstantBuffer<PushConstants> constantBuffer;
37
38// CHECK_SPV: OpEntryPoint
39// CHECK_SPV: OpTypePointer PhysicalStorageBuffer
40// CHECK_SPV: OpPtrAccessChain
41
42// CHECK_SPV_VIA_GLSL: Glslang
43// CHECK_SPV_VIA_GLSL: OpEntryPoint
44// CHECK_SPV_VIA_GLSL: OpTypePointer PhysicalStorageBuffer
45
46[shader("vertex")]
47VSOutput vertexMain(int vertexIndex: SV_VulkanVertexID)
48{
49    //
50    // Test field access chains.
51    //
52
53    // CHECK_GLSL: (((((pushConstants_0.verts_0 + gl_VertexIndex)._data.inner_1) + 1)._data.inner_0) + 5)._data.position_0
54    let position1 = pushConstants.verts[vertexIndex].inner[1].inner[5].position;
55
56    // CHECK_GLSL: (((((constantBuffer_0.verts_0 + 7)._data.inner_1) + 3)._data.inner_0) + 4)._data.position_0
57    let position2 = constantBuffer.verts[7].inner[3].inner[4].position;
58
59    // CHECK_GLSL: (((constantBuffer_0.verts_0 + gl_VertexIndex)._data.inner_1) + 12)._data.position_1
60    let position3 = constantBuffer.verts[vertexIndex].inner[12].position;
61
62    //
63    // Test accesing from a variable.
64    //
65
66    // CHECK_GLSL: ((((pushConstants_0.verts_0 + 8)._data.inner_1 + 6)._data.inner_0))._data.position_0
67    let vertex = pushConstants.verts[8];
68    let position4 = vertex.inner[6].inner.position;
69
70    VSOutput output;
71    output.position = position1 + position2 + position3 + position4;
72    output.position *= pushConstants.a;
73
74    return output;
75}
76