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SPIRV-Cross/shaders-msl-no-opt/asm/tesc/tess-fixed-input-array-builtin-array.invalid.multi-patch.asm.tesc

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MSL: Add support for processing more than one patch per workgroup. This should hopefully reduce underutilization of the GPU, especially on GPUs where the thread execution width is greater than the number of control points. This also simplifies initialization by reading the buffer directly instead of using Metal's vertex-attribute-in-compute support. It turns out the only way in which shader stages are allowed to differ in their interfaces is in the number of components per vector; the base type must be the same. Since we are using the raw buffer instead of attributes, we can now also emit arrays and matrices directly into the buffer, instead of flattening them and then unpacking them. Structs are still flattened, however; this is due to the need to handle vectors with fewer components than were output, and I think handling this while also directly emitting structs could get ugly. Another advantage of this scheme is that the extra invocations needed to read the attributes when there were more input than output points are now no more. The number of threads per workgroup is now lcm(SIMD-size, output control points). This should ensure we always process a whole number of patches per workgroup. To avoid complexity handling indices in the tessellation control shader, I've also changed the way vertex shaders for tessellation are handled. They are now compute kernels using Metal's support for vertex-style stage input. This lets us always emit vertices into the buffer in order of vertex shader execution. Now we no longer have to deal with indexing in the tessellation control shader. This also fixes a long-standing issue where if an index were greater than the number of vertices to draw, the vertex shader would wind up writing outside the buffer, and the vertex would be lost. This is a breaking change, and I know SPIRV-Cross has other clients, so I've hidden this behind an option for now. In the future, I want to remove this option and make it the default.
2020-02-21 03:38:28 +00:00
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 2
; Bound: 162
; Schema: 0
OpCapability Tessellation
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint TessellationControl %hs_main "main" %p_pos %p_1 %i_1 %_entryPointOutput_pos %_entryPointOutput %_patchConstantOutput_EdgeTess %_patchConstantOutput_InsideTess
OpExecutionMode %hs_main OutputVertices 3
OpExecutionMode %hs_main Triangles
OpExecutionMode %hs_main SpacingFractionalOdd
OpExecutionMode %hs_main VertexOrderCw
OpSource HLSL 500
OpName %hs_main "hs_main"
OpName %VertexOutput "VertexOutput"
OpMemberName %VertexOutput 0 "pos"
OpMemberName %VertexOutput 1 "uv"
OpName %HSOut "HSOut"
OpMemberName %HSOut 0 "pos"
OpMemberName %HSOut 1 "uv"
OpName %_hs_main_struct_VertexOutput_vf4_vf21_3__u1_ "@hs_main(struct-VertexOutput-vf4-vf21[3];u1;"
OpName %p "p"
OpName %i "i"
OpName %HSConstantOut "HSConstantOut"
OpMemberName %HSConstantOut 0 "EdgeTess"
OpMemberName %HSConstantOut 1 "InsideTess"
OpName %PatchHS_struct_VertexOutput_vf4_vf21_3__ "PatchHS(struct-VertexOutput-vf4-vf21[3];"
OpName %patch "patch"
OpName %output "output"
OpName %p_0 "p"
OpName %p_pos "p.pos"
OpName %VertexOutput_0 "VertexOutput"
OpMemberName %VertexOutput_0 0 "uv"
OpName %p_1 "p"
OpName %i_0 "i"
OpName %i_1 "i"
OpName %flattenTemp "flattenTemp"
OpName %param "param"
OpName %param_0 "param"
OpName %_entryPointOutput_pos "@entryPointOutput.pos"
OpName %HSOut_0 "HSOut"
OpMemberName %HSOut_0 0 "uv"
OpName %_entryPointOutput "@entryPointOutput"
OpName %_patchConstantResult "@patchConstantResult"
OpName %param_1 "param"
OpName %_patchConstantOutput_EdgeTess "@patchConstantOutput.EdgeTess"
OpName %_patchConstantOutput_InsideTess "@patchConstantOutput.InsideTess"
OpName %output_0 "output"
OpDecorate %p_pos BuiltIn Position
OpDecorate %p_1 Location 0
OpDecorate %i_1 BuiltIn InvocationId
OpDecorate %_entryPointOutput_pos BuiltIn Position
OpDecorate %_entryPointOutput Location 0
OpDecorate %_patchConstantOutput_EdgeTess Patch
OpDecorate %_patchConstantOutput_EdgeTess BuiltIn TessLevelOuter
OpDecorate %_patchConstantOutput_InsideTess Patch
OpDecorate %_patchConstantOutput_InsideTess BuiltIn TessLevelInner
%void = OpTypeVoid
%3 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%v2float = OpTypeVector %float 2
%VertexOutput = OpTypeStruct %v4float %v2float
%uint = OpTypeInt 32 0
%uint_3 = OpConstant %uint 3
%_arr_VertexOutput_uint_3 = OpTypeArray %VertexOutput %uint_3
%_ptr_Function__arr_VertexOutput_uint_3 = OpTypePointer Function %_arr_VertexOutput_uint_3
%_ptr_Function_uint = OpTypePointer Function %uint
%HSOut = OpTypeStruct %v4float %v2float
%16 = OpTypeFunction %HSOut %_ptr_Function__arr_VertexOutput_uint_3 %_ptr_Function_uint
%_arr_float_uint_3 = OpTypeArray %float %uint_3
%HSConstantOut = OpTypeStruct %_arr_float_uint_3 %float
%23 = OpTypeFunction %HSConstantOut %_ptr_Function__arr_VertexOutput_uint_3
%_ptr_Function_HSOut = OpTypePointer Function %HSOut
%int = OpTypeInt 32 1
%int_0 = OpConstant %int 0
%_ptr_Function_v4float = OpTypePointer Function %v4float
%int_1 = OpConstant %int 1
%_ptr_Function_v2float = OpTypePointer Function %v2float
%_arr_v4float_uint_3 = OpTypeArray %v4float %uint_3
%_ptr_Input__arr_v4float_uint_3 = OpTypePointer Input %_arr_v4float_uint_3
%p_pos = OpVariable %_ptr_Input__arr_v4float_uint_3 Input
%_ptr_Input_v4float = OpTypePointer Input %v4float
%VertexOutput_0 = OpTypeStruct %v2float
%_arr_VertexOutput_0_uint_3 = OpTypeArray %VertexOutput_0 %uint_3
%_ptr_Input__arr_VertexOutput_0_uint_3 = OpTypePointer Input %_arr_VertexOutput_0_uint_3
%p_1 = OpVariable %_ptr_Input__arr_VertexOutput_0_uint_3 Input
%_ptr_Input_v2float = OpTypePointer Input %v2float
%int_2 = OpConstant %int 2
%_ptr_Input_uint = OpTypePointer Input %uint
%i_1 = OpVariable %_ptr_Input_uint Input
%_ptr_Output__arr_v4float_uint_3 = OpTypePointer Output %_arr_v4float_uint_3
%_entryPointOutput_pos = OpVariable %_ptr_Output__arr_v4float_uint_3 Output
%_ptr_Output_v4float = OpTypePointer Output %v4float
%HSOut_0 = OpTypeStruct %v2float
%_arr_HSOut_0_uint_3 = OpTypeArray %HSOut_0 %uint_3
%_ptr_Output__arr_HSOut_0_uint_3 = OpTypePointer Output %_arr_HSOut_0_uint_3
%_entryPointOutput = OpVariable %_ptr_Output__arr_HSOut_0_uint_3 Output
%_ptr_Output_v2float = OpTypePointer Output %v2float
%uint_2 = OpConstant %uint 2
%uint_1 = OpConstant %uint 1
%uint_0 = OpConstant %uint 0
%bool = OpTypeBool
%_ptr_Function_HSConstantOut = OpTypePointer Function %HSConstantOut
%uint_4 = OpConstant %uint 4
%_arr_float_uint_4 = OpTypeArray %float %uint_4
%_ptr_Output__arr_float_uint_4 = OpTypePointer Output %_arr_float_uint_4
%_patchConstantOutput_EdgeTess = OpVariable %_ptr_Output__arr_float_uint_4 Output
%_ptr_Function_float = OpTypePointer Function %float
%_ptr_Output_float = OpTypePointer Output %float
%_arr_float_uint_2 = OpTypeArray %float %uint_2
%_ptr_Output__arr_float_uint_2 = OpTypePointer Output %_arr_float_uint_2
%_patchConstantOutput_InsideTess = OpVariable %_ptr_Output__arr_float_uint_2 Output
%float_1 = OpConstant %float 1
%hs_main = OpFunction %void None %3
%5 = OpLabel
%p_0 = OpVariable %_ptr_Function__arr_VertexOutput_uint_3 Function
%i_0 = OpVariable %_ptr_Function_uint Function
%flattenTemp = OpVariable %_ptr_Function_HSOut Function
%param = OpVariable %_ptr_Function__arr_VertexOutput_uint_3 Function
%param_0 = OpVariable %_ptr_Function_uint Function
%_patchConstantResult = OpVariable %_ptr_Function_HSConstantOut Function
%param_1 = OpVariable %_ptr_Function__arr_VertexOutput_uint_3 Function
%50 = OpAccessChain %_ptr_Input_v4float %p_pos %int_0
%51 = OpLoad %v4float %50
%52 = OpAccessChain %_ptr_Function_v4float %p_0 %int_0 %int_0
OpStore %52 %51
%58 = OpAccessChain %_ptr_Input_v2float %p_1 %int_0 %int_0
%59 = OpLoad %v2float %58
%60 = OpAccessChain %_ptr_Function_v2float %p_0 %int_0 %int_1
OpStore %60 %59
%61 = OpAccessChain %_ptr_Input_v4float %p_pos %int_1
%62 = OpLoad %v4float %61
%63 = OpAccessChain %_ptr_Function_v4float %p_0 %int_1 %int_0
OpStore %63 %62
%64 = OpAccessChain %_ptr_Input_v2float %p_1 %int_1 %int_0
%65 = OpLoad %v2float %64
%66 = OpAccessChain %_ptr_Function_v2float %p_0 %int_1 %int_1
OpStore %66 %65
%68 = OpAccessChain %_ptr_Input_v4float %p_pos %int_2
%69 = OpLoad %v4float %68
%70 = OpAccessChain %_ptr_Function_v4float %p_0 %int_2 %int_0
OpStore %70 %69
%71 = OpAccessChain %_ptr_Input_v2float %p_1 %int_2 %int_0
%72 = OpLoad %v2float %71
%73 = OpAccessChain %_ptr_Function_v2float %p_0 %int_2 %int_1
OpStore %73 %72
%77 = OpLoad %uint %i_1
OpStore %i_0 %77
%80 = OpLoad %_arr_VertexOutput_uint_3 %p_0
OpStore %param %80
%82 = OpLoad %uint %i_0
OpStore %param_0 %82
%83 = OpFunctionCall %HSOut %_hs_main_struct_VertexOutput_vf4_vf21_3__u1_ %param %param_0
OpStore %flattenTemp %83
%86 = OpAccessChain %_ptr_Function_v4float %flattenTemp %int_0
%87 = OpLoad %v4float %86
%94 = OpLoad %uint %i_1
%89 = OpAccessChain %_ptr_Output_v4float %_entryPointOutput_pos %94
OpStore %89 %87
%95 = OpAccessChain %_ptr_Function_v2float %flattenTemp %int_1
%96 = OpLoad %v2float %95
%98 = OpAccessChain %_ptr_Output_v2float %_entryPointOutput %94 %int_0
OpStore %98 %96
OpControlBarrier %uint_2 %uint_1 %uint_0
%102 = OpLoad %uint %i_1
%104 = OpIEqual %bool %102 %int_0
OpSelectionMerge %106 None
OpBranchConditional %104 %105 %106
%105 = OpLabel
%110 = OpLoad %_arr_VertexOutput_uint_3 %p_0
OpStore %param_1 %110
%111 = OpFunctionCall %HSConstantOut %PatchHS_struct_VertexOutput_vf4_vf21_3__ %param_1
OpStore %_patchConstantResult %111
%117 = OpAccessChain %_ptr_Function_float %_patchConstantResult %int_0 %int_0
%118 = OpLoad %float %117
%120 = OpAccessChain %_ptr_Output_float %_patchConstantOutput_EdgeTess %int_0
OpStore %120 %118
%121 = OpAccessChain %_ptr_Function_float %_patchConstantResult %int_0 %int_1
%122 = OpLoad %float %121
%123 = OpAccessChain %_ptr_Output_float %_patchConstantOutput_EdgeTess %int_1
OpStore %123 %122
%124 = OpAccessChain %_ptr_Function_float %_patchConstantResult %int_0 %int_2
%125 = OpLoad %float %124
%126 = OpAccessChain %_ptr_Output_float %_patchConstantOutput_EdgeTess %int_2
OpStore %126 %125
%130 = OpAccessChain %_ptr_Function_float %_patchConstantResult %int_1
%131 = OpLoad %float %130
%132 = OpAccessChain %_ptr_Output_float %_patchConstantOutput_InsideTess %int_0
OpStore %132 %131
OpBranch %106
%106 = OpLabel
OpReturn
OpFunctionEnd
%_hs_main_struct_VertexOutput_vf4_vf21_3__u1_ = OpFunction %HSOut None %16
%p = OpFunctionParameter %_ptr_Function__arr_VertexOutput_uint_3
%i = OpFunctionParameter %_ptr_Function_uint
%20 = OpLabel
%output = OpVariable %_ptr_Function_HSOut Function
%31 = OpLoad %uint %i
%33 = OpAccessChain %_ptr_Function_v4float %p %31 %int_0
%34 = OpLoad %v4float %33
%35 = OpAccessChain %_ptr_Function_v4float %output %int_0
OpStore %35 %34
%37 = OpLoad %uint %i
%39 = OpAccessChain %_ptr_Function_v2float %p %37 %int_1
%40 = OpLoad %v2float %39
%41 = OpAccessChain %_ptr_Function_v2float %output %int_1
OpStore %41 %40
%42 = OpLoad %HSOut %output
OpReturnValue %42
OpFunctionEnd
%PatchHS_struct_VertexOutput_vf4_vf21_3__ = OpFunction %HSConstantOut None %23
%patch = OpFunctionParameter %_ptr_Function__arr_VertexOutput_uint_3
%26 = OpLabel
%output_0 = OpVariable %_ptr_Function_HSConstantOut Function
%135 = OpAccessChain %_ptr_Function_v2float %patch %int_0 %int_1
%136 = OpLoad %v2float %135
%137 = OpCompositeConstruct %v2float %float_1 %float_1
%138 = OpFAdd %v2float %137 %136
%139 = OpCompositeExtract %float %138 0
%140 = OpAccessChain %_ptr_Function_float %output_0 %int_0 %int_0
OpStore %140 %139
%141 = OpAccessChain %_ptr_Function_v2float %patch %int_0 %int_1
%142 = OpLoad %v2float %141
%143 = OpCompositeConstruct %v2float %float_1 %float_1
%144 = OpFAdd %v2float %143 %142
%145 = OpCompositeExtract %float %144 0
%146 = OpAccessChain %_ptr_Function_float %output_0 %int_0 %int_1
OpStore %146 %145
%147 = OpAccessChain %_ptr_Function_v2float %patch %int_0 %int_1
%148 = OpLoad %v2float %147
%149 = OpCompositeConstruct %v2float %float_1 %float_1
%150 = OpFAdd %v2float %149 %148
%151 = OpCompositeExtract %float %150 0
%152 = OpAccessChain %_ptr_Function_float %output_0 %int_0 %int_2
OpStore %152 %151
%153 = OpAccessChain %_ptr_Function_v2float %patch %int_0 %int_1
%154 = OpLoad %v2float %153
%155 = OpCompositeConstruct %v2float %float_1 %float_1
%156 = OpFAdd %v2float %155 %154
%157 = OpCompositeExtract %float %156 0
%158 = OpAccessChain %_ptr_Function_float %output_0 %int_1
OpStore %158 %157
%159 = OpLoad %HSConstantOut %output_0
OpReturnValue %159
OpFunctionEnd
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