1#!amber 2 3# Copyright 2021 Google LLC 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17 18# A test for a coverage-gap found by the GraphicsFuzz project. 19 20# Short description: A fragment shader that covers specific LLVM code paths 21 22# The test passes because the shader always writes red. 23 24SHADER vertex variant_vertex_shader PASSTHROUGH 25 26# variant_fragment_shader is derived from the following GLSL: 27# #version 320 es 28# #define _float_0_0 _GLF_uniform_float_values[0] 29# #define _float_1_0 _GLF_uniform_float_values[1] 30# 31# precision highp float; 32# precision highp int; 33# 34# // Contents of _GLF_uniform_float_values: [0.0, 1.0] 35# layout(set = 0, binding = 0) uniform buf0 36# { 37# float _GLF_uniform_float_values[2]; 38# }; 39# 40# // Contents of injectionSwitch: [0.0, 1.0] 41# layout(set = 0, binding = 1) uniform buf1 42# { 43# vec2 injectionSwitch; 44# }; 45# 46# layout(location = 0) out vec4 _GLF_color; 47# 48# void main() 49# { 50# for(int i = int(injectionSwitch.y); i != 0; i--) 51# { 52# // Always true. 53# if(gl_FragCoord.x > 0.0) 54# { 55# _GLF_color = vec4(_float_1_0, injectionSwitch.x, _float_0_0, _float_1_0); 56# } 57# else 58# { 59# for(int j = 1; j > 0; j--) 60# { 61# // Similar condition as above, but never executed. 62# if(gl_FragCoord.x > 0.0) 63# { 64# _GLF_color = vec4(1.0); 65# } 66# else 67# { 68# discard; 69# } 70# } 71# } 72# } 73# } 74SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 75; SPIR-V 76; Version: 1.0 77; Generator: Khronos Glslang Reference Front End; 10 78; Bound: 79 79; Schema: 0 80 OpCapability Shader 81 %1 = OpExtInstImport "GLSL.std.450" 82 OpMemoryModel Logical GLSL450 83 OpEntryPoint Fragment %4 "main" %31 %41 84 OpExecutionMode %4 OriginUpperLeft 85 OpSource ESSL 320 86 OpName %4 "main" 87 OpName %8 "i" 88 OpName %11 "buf1" 89 OpMemberName %11 0 "injectionSwitch" 90 OpName %13 "" 91 OpName %31 "gl_FragCoord" 92 OpName %41 "_GLF_color" 93 OpName %44 "buf0" 94 OpMemberName %44 0 "_GLF_uniform_float_values" 95 OpName %46 "" 96 OpName %58 "j" 97 OpMemberDecorate %11 0 Offset 0 98 OpDecorate %11 Block 99 OpDecorate %13 DescriptorSet 0 100 OpDecorate %13 Binding 1 101 OpDecorate %31 BuiltIn FragCoord 102 OpDecorate %41 Location 0 103 OpDecorate %43 ArrayStride 16 104 OpMemberDecorate %44 0 Offset 0 105 OpDecorate %44 Block 106 OpDecorate %46 DescriptorSet 0 107 OpDecorate %46 Binding 0 108 %2 = OpTypeVoid 109 %3 = OpTypeFunction %2 110 %6 = OpTypeInt 32 1 111 %7 = OpTypePointer Function %6 112 %9 = OpTypeFloat 32 113 %10 = OpTypeVector %9 2 114 %11 = OpTypeStruct %10 115 %12 = OpTypePointer Uniform %11 116 %13 = OpVariable %12 Uniform 117 %14 = OpConstant %6 0 118 %15 = OpTypeInt 32 0 119 %16 = OpConstant %15 1 120 %17 = OpTypePointer Uniform %9 121 %27 = OpTypeBool 122 %29 = OpTypeVector %9 4 123 %30 = OpTypePointer Input %29 124 %31 = OpVariable %30 Input 125 %32 = OpConstant %15 0 126 %33 = OpTypePointer Input %9 127 %36 = OpConstant %9 0 128 %40 = OpTypePointer Output %29 129 %41 = OpVariable %40 Output 130 %42 = OpConstant %15 2 131 %43 = OpTypeArray %9 %42 132 %44 = OpTypeStruct %43 133 %45 = OpTypePointer Uniform %44 134 %46 = OpVariable %45 Uniform 135 %47 = OpConstant %6 1 136 %71 = OpConstant %9 1 137 %72 = OpConstantComposite %29 %71 %71 %71 %71 138 %4 = OpFunction %2 None %3 139 %5 = OpLabel 140 %8 = OpVariable %7 Function 141 %58 = OpVariable %7 Function 142 %18 = OpAccessChain %17 %13 %14 %16 143 %19 = OpLoad %9 %18 144 %20 = OpConvertFToS %6 %19 145 OpStore %8 %20 146 OpBranch %21 147 %21 = OpLabel 148 OpLoopMerge %23 %24 None 149 OpBranch %25 150 %25 = OpLabel 151 %26 = OpLoad %6 %8 152 %28 = OpINotEqual %27 %26 %14 153 OpBranchConditional %28 %22 %23 154 %22 = OpLabel 155 %34 = OpAccessChain %33 %31 %32 156 %35 = OpLoad %9 %34 157 %37 = OpFOrdGreaterThan %27 %35 %36 158 OpSelectionMerge %39 None 159 OpBranchConditional %37 %38 %57 160 %38 = OpLabel 161 %48 = OpAccessChain %17 %46 %14 %47 162 %49 = OpLoad %9 %48 163 %50 = OpAccessChain %17 %13 %14 %32 164 %51 = OpLoad %9 %50 165 %52 = OpAccessChain %17 %46 %14 %14 166 %53 = OpLoad %9 %52 167 %54 = OpAccessChain %17 %46 %14 %47 168 %55 = OpLoad %9 %54 169 %56 = OpCompositeConstruct %29 %49 %51 %53 %55 170 OpStore %41 %56 171 OpBranch %39 172 %57 = OpLabel 173 OpStore %58 %47 174 OpBranch %59 175 %59 = OpLabel 176 OpLoopMerge %61 %62 None 177 OpBranch %63 178 %63 = OpLabel 179 %64 = OpLoad %6 %58 180 %65 = OpSGreaterThan %27 %64 %14 181 OpBranchConditional %65 %60 %61 182 %60 = OpLabel 183 %66 = OpAccessChain %33 %31 %32 184 %67 = OpLoad %9 %66 185 %68 = OpFOrdGreaterThan %27 %67 %36 186 OpSelectionMerge %70 None 187 OpBranchConditional %68 %69 %73 188 %69 = OpLabel 189 OpStore %41 %72 190 OpBranch %70 191 %73 = OpLabel 192 OpKill 193 %70 = OpLabel 194 OpBranch %62 195 %62 = OpLabel 196 %75 = OpLoad %6 %58 197 %76 = OpISub %6 %75 %47 198 OpStore %58 %76 199 OpBranch %59 200 %61 = OpLabel 201 OpBranch %39 202 %39 = OpLabel 203 OpBranch %24 204 %24 = OpLabel 205 %77 = OpLoad %6 %8 206 %78 = OpISub %6 %77 %47 207 OpStore %8 %78 208 OpBranch %21 209 %23 = OpLabel 210 OpReturn 211 OpFunctionEnd 212END 213 214# uniforms for variant 215 216# injectionSwitch 217BUFFER variant_injectionSwitch DATA_TYPE vec2<float> STD140 DATA 218 0.0 1.0 219END 220# _GLF_uniform_float_values 221BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA 222 0.0 1.0 223END 224 225BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 226 227PIPELINE graphics variant_pipeline 228 ATTACH variant_vertex_shader 229 ATTACH variant_fragment_shader 230 FRAMEBUFFER_SIZE 256 256 231 BIND BUFFER variant_framebuffer AS color LOCATION 0 232 BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 1 233 BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0 234END 235CLEAR_COLOR variant_pipeline 0 0 0 255 236 237CLEAR variant_pipeline 238RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 239 240EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 241