1#!amber 2 3# Copyright 2022 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# 29# precision highp float; 30# precision highp int; 31# 32# layout(set = 0, binding = 0) uniform buf0 33# { 34# uint one; 35# }; 36# 37# layout(location = 0) out vec4 _GLF_color; 38# 39# void main() 40# { 41# // Simplifies to min(0, 0) = 0. 42# uint a = min(((one & 0x80000000u) != 0u ? 1u : 0u), (one & 0x80000000u) != 0u ? 1u : 0u); 43# 44# // Always true. 45# if (a == 0u) 46# _GLF_color = vec4(1, 0, 0, 1); 47# else 48# _GLF_color = vec4(0); 49# } 50SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 51; SPIR-V 52; Version: 1.0 53; Generator: Khronos Glslang Reference Front End; 10 54; Bound: 43 55; Schema: 0 56 OpCapability Shader 57 %1 = OpExtInstImport "GLSL.std.450" 58 OpMemoryModel Logical GLSL450 59 OpEntryPoint Fragment %4 "main" %37 60 OpExecutionMode %4 OriginUpperLeft 61 OpSource ESSL 320 62 OpName %4 "main" 63 OpName %8 "a" 64 OpName %9 "buf0" 65 OpMemberName %9 0 "one" 66 OpName %11 "" 67 OpName %37 "_GLF_color" 68 OpMemberDecorate %9 0 Offset 0 69 OpDecorate %9 Block 70 OpDecorate %11 DescriptorSet 0 71 OpDecorate %11 Binding 0 72 OpDecorate %37 Location 0 73 %2 = OpTypeVoid 74 %3 = OpTypeFunction %2 75 %6 = OpTypeInt 32 0 76 %7 = OpTypePointer Function %6 77 %9 = OpTypeStruct %6 78 %10 = OpTypePointer Uniform %9 79 %11 = OpVariable %10 Uniform 80 %12 = OpTypeInt 32 1 81 %13 = OpConstant %12 0 82 %14 = OpTypePointer Uniform %6 83 %17 = OpConstant %6 2147483648 84 %19 = OpConstant %6 0 85 %20 = OpTypeBool 86 %22 = OpConstant %6 1 87 %34 = OpTypeFloat 32 88 %35 = OpTypeVector %34 4 89 %36 = OpTypePointer Output %35 90 %37 = OpVariable %36 Output 91 %38 = OpConstant %34 1 92 %39 = OpConstant %34 0 93 %40 = OpConstantComposite %35 %38 %39 %39 %38 94 %42 = OpConstantComposite %35 %39 %39 %39 %39 95 %4 = OpFunction %2 None %3 96 %5 = OpLabel 97 %8 = OpVariable %7 Function 98 %15 = OpAccessChain %14 %11 %13 99 %16 = OpLoad %6 %15 100 %18 = OpBitwiseAnd %6 %16 %17 101 %21 = OpINotEqual %20 %18 %19 102 %23 = OpSelect %6 %21 %22 %19 103 %24 = OpAccessChain %14 %11 %13 104 %25 = OpLoad %6 %24 105 %26 = OpBitwiseAnd %6 %25 %17 106 %27 = OpINotEqual %20 %26 %19 107 %28 = OpSelect %6 %27 %22 %19 108 %29 = OpExtInst %6 %1 UMin %23 %28 109 OpStore %8 %29 110 %30 = OpLoad %6 %8 111 %31 = OpIEqual %20 %30 %19 112 OpSelectionMerge %33 None 113 OpBranchConditional %31 %32 %41 114 %32 = OpLabel 115 OpStore %37 %40 116 OpBranch %33 117 %41 = OpLabel 118 OpStore %37 %42 119 OpBranch %33 120 %33 = OpLabel 121 OpReturn 122 OpFunctionEnd 123END 124 125# uniforms for variant 126 127# one 128BUFFER variant_one DATA_TYPE uint32 STD140 DATA 129 1 130END 131 132BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 133 134PIPELINE graphics variant_pipeline 135 ATTACH variant_vertex_shader 136 ATTACH variant_fragment_shader 137 FRAMEBUFFER_SIZE 32 32 138 BIND BUFFER variant_framebuffer AS color LOCATION 0 139 BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0 140END 141CLEAR_COLOR variant_pipeline 0 0 0 255 142 143CLEAR variant_pipeline 144RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32 145 146EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255 147