DirectXShaderCompiler/tools/clang/test/CodeGenSPIRV/hs.pcf.input-patch.hlsl

// Run: %dxc -T hs_6_0 -E main

#include "bezier_common_hull.hlsl"

// Test: PCF takes the input control points (InputPatch)

// CHECK:              [[fType:%\d+]] = OpTypeFunction %HS_CONSTANT_DATA_OUTPUT %_ptr_Function__arr_VS_CONTROL_POINT_OUTPUT_uint_16

// CHECK:                       %main = OpFunction %void None {{%\d+}}
// CHECK:               %param_var_ip = OpVariable %_ptr_Function__arr_VS_CONTROL_POINT_OUTPUT_uint_16 Function

// CHECK:                    {{%\d+}} = OpFunctionCall %HS_CONSTANT_DATA_OUTPUT %PCF %param_var_ip

// CHECK:                        %PCF = OpFunction %HS_CONSTANT_DATA_OUTPUT None [[fType]]
// CHECK-NEXT:                    %ip = OpFunctionParameter %_ptr_Function__arr_VS_CONTROL_POINT_OUTPUT_uint_16


HS_CONSTANT_DATA_OUTPUT PCF(InputPatch<VS_CONTROL_POINT_OUTPUT, MAX_POINTS> ip) {
  HS_CONSTANT_DATA_OUTPUT Output;
  // Must initialize Edges and Inside; otherwise HLSL validation will fail.
  Output.Edges[0]  = 1.0;
  Output.Edges[1]  = 2.0;
  Output.Edges[2]  = 3.0;
  Output.Edges[3]  = 4.0;
  Output.Inside[0] = 5.0;
  Output.Inside[1] = 6.0;
  return Output;
}

// Note: This second patch constant function is placed here, but should not be used
// because the "patchconstantfunc" attribute does not point to this function.
HS_CONSTANT_DATA_OUTPUT PCF_2(InputPatch<VS_CONTROL_POINT_OUTPUT, MAX_POINTS> ip) {
  HS_CONSTANT_DATA_OUTPUT Output;
  // Must initialize Edges and Inside; otherwise HLSL validation will fail.
  Output.Edges[0]  = 2.0;
  Output.Edges[1]  = 3.0;
  Output.Edges[2]  = 4.0;
  Output.Edges[3]  = 5.0;
  Output.Inside[0] = 6.0;
  Output.Inside[1] = 7.0;
  return Output;
}

[domain("isoline")]
[partitioning("fractional_odd")]
[outputtopology("line")]
[outputcontrolpoints(16)]
[patchconstantfunc("PCF")]
BEZIER_CONTROL_POINT main(InputPatch<VS_CONTROL_POINT_OUTPUT, MAX_POINTS> ip, uint i : SV_OutputControlPointID, uint PatchID : SV_PrimitiveID) {
  VS_CONTROL_POINT_OUTPUT vsOutput;
  BEZIER_CONTROL_POINT result;
  result.vPosition = vsOutput.vPosition;
  return result;
}