This is a fairly fundamental change on how IDs are handled. It serves many purposes: - Improve performance. We only need to iterate over IDs which are relevant at any one time. - Makes sure we iterate through IDs in SPIR-V module declaration order rather than ID space. IDs don't have to be monotonically increasing, which was an assumption SPIRV-Cross used to have. It has apparently never been a problem until now. - Support LUTs of structs. We do this by interleaving declaration of constants and struct types in SPIR-V module order. To support this, the ParsedIR interface needed to change slightly. Before setting any ID with variant_set<T> we let ParsedIR know that an ID with a specific type has been added. The surface for change should be minimal. ParsedIR will maintain a per-type list of IDs which the cross-compiler will need to consider for later. Instead of looping over ir.ids[] (which can be extremely large), we loop over types now, using: ir.for_each_typed_id<SPIRVariable>([&](uint32_t id, SPIRVariable &var) { handle_variable(var); }); Now we make sure that we're never looking at irrelevant types.
28 lines
660 B
Plaintext
28 lines
660 B
Plaintext
#version 310 es
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layout(local_size_x = 2, local_size_y = 1, local_size_z = 1) in;
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struct Data
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{
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float a;
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float b;
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};
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const Data _25[2] = Data[](Data(1.0, 2.0), Data(3.0, 4.0));
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#ifndef SPIRV_CROSS_CONSTANT_ID_0
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#define SPIRV_CROSS_CONSTANT_ID_0 4.0
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#endif
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const float X = SPIRV_CROSS_CONSTANT_ID_0;
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layout(binding = 0, std430) buffer SSBO
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{
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Data outdata[];
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} _53;
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void main()
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{
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Data data2[2] = Data[](Data(X, 2.0), Data(3.0, 5.0));
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_53.outdata[gl_WorkGroupID.x].a = _25[gl_LocalInvocationID.x].a + data2[gl_LocalInvocationID.x].a;
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_53.outdata[gl_WorkGroupID.x].b = _25[gl_LocalInvocationID.x].b + data2[gl_LocalInvocationID.x].b;
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}
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