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 _int_1 _GLF_uniform_int_values[0] 29# #define _int_0 _GLF_uniform_int_values[1] 30# 31# precision highp float; 32# precision highp int; 33# 34# // Contents of _GLF_uniform_int_values: [1, 0] 35# layout(set = 0, binding = 0) uniform buf0 36# { 37# int _GLF_uniform_int_values[2]; 38# }; 39# 40# layout(location = 0) out vec4 _GLF_color; 41# 42# void main() 43# { 44# int a = _int_0; 45# 46# // Never iterated. 47# for(int i = _int_0; (_int_1 | i) < 1; i++) 48# { 49# a++; 50# } 51# 52# // Always true. 53# if(a == _int_0) 54# { 55# _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1); 56# } 57# else 58# { 59# _GLF_color = vec4(_int_0); 60# } 61# } 62SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 63; SPIR-V 64; Version: 1.0 65; Generator: Khronos Glslang Reference Front End; 10 66; Bound: 66 67; Schema: 0 68 OpCapability Shader 69 %1 = OpExtInstImport "GLSL.std.450" 70 OpMemoryModel Logical GLSL450 71 OpEntryPoint Fragment %4 "main" %47 72 OpExecutionMode %4 OriginUpperLeft 73 OpSource ESSL 320 74 OpName %4 "main" 75 OpName %8 "a" 76 OpName %12 "buf0" 77 OpMemberName %12 0 "_GLF_uniform_int_values" 78 OpName %14 "" 79 OpName %20 "i" 80 OpName %47 "_GLF_color" 81 OpDecorate %11 ArrayStride 16 82 OpMemberDecorate %12 0 Offset 0 83 OpDecorate %12 Block 84 OpDecorate %14 DescriptorSet 0 85 OpDecorate %14 Binding 0 86 OpDecorate %47 Location 0 87 %2 = OpTypeVoid 88 %3 = OpTypeFunction %2 89 %6 = OpTypeInt 32 1 90 %7 = OpTypePointer Function %6 91 %9 = OpTypeInt 32 0 92 %10 = OpConstant %9 2 93 %11 = OpTypeArray %6 %10 94 %12 = OpTypeStruct %11 95 %13 = OpTypePointer Uniform %12 96 %14 = OpVariable %13 Uniform 97 %15 = OpConstant %6 0 98 %16 = OpConstant %6 1 99 %17 = OpTypePointer Uniform %6 100 %32 = OpTypeBool 101 %44 = OpTypeFloat 32 102 %45 = OpTypeVector %44 4 103 %46 = OpTypePointer Output %45 104 %47 = OpVariable %46 Output 105 %4 = OpFunction %2 None %3 106 %5 = OpLabel 107 %8 = OpVariable %7 Function 108 %20 = OpVariable %7 Function 109 %18 = OpAccessChain %17 %14 %15 %16 110 %19 = OpLoad %6 %18 111 OpStore %8 %19 112 %21 = OpAccessChain %17 %14 %15 %16 113 %22 = OpLoad %6 %21 114 OpStore %20 %22 115 OpBranch %23 116 %23 = OpLabel 117 OpLoopMerge %25 %26 None 118 OpBranch %27 119 %27 = OpLabel 120 %28 = OpAccessChain %17 %14 %15 %15 121 %29 = OpLoad %6 %28 122 %30 = OpLoad %6 %20 123 %31 = OpBitwiseOr %6 %29 %30 124 %33 = OpSLessThan %32 %31 %16 125 OpBranchConditional %33 %24 %25 126 %24 = OpLabel 127 %34 = OpLoad %6 %8 128 %35 = OpIAdd %6 %34 %16 129 OpStore %8 %35 130 OpBranch %26 131 %26 = OpLabel 132 %36 = OpLoad %6 %20 133 %37 = OpIAdd %6 %36 %16 134 OpStore %20 %37 135 OpBranch %23 136 %25 = OpLabel 137 %38 = OpLoad %6 %8 138 %39 = OpAccessChain %17 %14 %15 %16 139 %40 = OpLoad %6 %39 140 %41 = OpIEqual %32 %38 %40 141 OpSelectionMerge %43 None 142 OpBranchConditional %41 %42 %61 143 %42 = OpLabel 144 %48 = OpAccessChain %17 %14 %15 %15 145 %49 = OpLoad %6 %48 146 %50 = OpConvertSToF %44 %49 147 %51 = OpAccessChain %17 %14 %15 %16 148 %52 = OpLoad %6 %51 149 %53 = OpConvertSToF %44 %52 150 %54 = OpAccessChain %17 %14 %15 %16 151 %55 = OpLoad %6 %54 152 %56 = OpConvertSToF %44 %55 153 %57 = OpAccessChain %17 %14 %15 %15 154 %58 = OpLoad %6 %57 155 %59 = OpConvertSToF %44 %58 156 %60 = OpCompositeConstruct %45 %50 %53 %56 %59 157 OpStore %47 %60 158 OpBranch %43 159 %61 = OpLabel 160 %62 = OpAccessChain %17 %14 %15 %16 161 %63 = OpLoad %6 %62 162 %64 = OpConvertSToF %44 %63 163 %65 = OpCompositeConstruct %45 %64 %64 %64 %64 164 OpStore %47 %65 165 OpBranch %43 166 %43 = OpLabel 167 OpReturn 168 OpFunctionEnd 169END 170 171# uniforms for variant 172 173# _GLF_uniform_int_values 174BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA 175 1 0 176END 177 178BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 179 180PIPELINE graphics variant_pipeline 181 ATTACH variant_vertex_shader 182 ATTACH variant_fragment_shader 183 FRAMEBUFFER_SIZE 256 256 184 BIND BUFFER variant_framebuffer AS color LOCATION 0 185 BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0 186END 187CLEAR_COLOR variant_pipeline 0 0 0 255 188 189CLEAR variant_pipeline 190RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 191 192EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 193