dawn-cmake/test/tint/shader_io/invariant_struct_member.wgs...

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; SPIR-V
; Version: 1.3
; Generator: Google Tint Compiler; 0
; Bound: 21
; Schema: 0
OpCapability Shader
OpMemoryModel Logical GLSL450
OpEntryPoint Vertex %main "main" %pos_1 %vertex_point_size
OpName %pos_1 "pos_1"
OpName %vertex_point_size "vertex_point_size"
OpName %Out "Out"
OpMemberName %Out 0 "pos"
OpName %main_inner "main_inner"
OpName %main "main"
OpDecorate %pos_1 BuiltIn Position
OpDecorate %pos_1 Invariant
OpDecorate %vertex_point_size BuiltIn PointSize
OpMemberDecorate %Out 0 Offset 0
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%5 = OpConstantNull %v4float
%pos_1 = OpVariable %_ptr_Output_v4float Output %5
%_ptr_Output_float = OpTypePointer Output %float
%8 = OpConstantNull %float
%vertex_point_size = OpVariable %_ptr_Output_float Output %8
%Out = OpTypeStruct %v4float
%9 = OpTypeFunction %Out
%13 = OpConstantNull %Out
%void = OpTypeVoid
%14 = OpTypeFunction %void
%float_1 = OpConstant %float 1
%main_inner = OpFunction %Out None %9
%12 = OpLabel
OpReturnValue %13
OpFunctionEnd
%main = OpFunction %void None %14
%17 = OpLabel
%18 = OpFunctionCall %Out %main_inner
%19 = OpCompositeExtract %v4float %18 0
OpStore %pos_1 %19
OpStore %vertex_point_size %float_1
OpReturn
OpFunctionEnd