1#!amber 2 3# Copyright 2020 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 GraphicsFuzz. 19 20# Short description: A fragment shader that covers a specific instruction simplification code path 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 310 es 28# precision highp float; 29# precision highp int; 30# 31# layout(location = 0) out vec4 _GLF_color; 32# 33# layout(set = 0, binding = 0) uniform buf0 34# { 35# uint two; 36# }; 37# 38# void main() 39# { 40# uint a = two / 1u; 41# 42# if (a == 2u) 43# _GLF_color = vec4(1, 0, 0, 1); 44# else 45# _GLF_color = vec4(0); 46# 47# } 48SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 49; SPIR-V 50; Version: 1.0 51; Generator: Khronos Glslang Reference Front End; 8 52; Bound: 34 53; Schema: 0 54 OpCapability Shader 55 %1 = OpExtInstImport "GLSL.std.450" 56 OpMemoryModel Logical GLSL450 57 OpEntryPoint Fragment %4 "main" %28 58 OpExecutionMode %4 OriginUpperLeft 59 OpSource ESSL 310 60 OpName %4 "main" 61 OpName %8 "a" 62 OpName %9 "buf0" 63 OpMemberName %9 0 "two" 64 OpName %11 "" 65 OpName %28 "_GLF_color" 66 OpMemberDecorate %9 0 Offset 0 67 OpDecorate %9 Block 68 OpDecorate %11 DescriptorSet 0 69 OpDecorate %11 Binding 0 70 OpDecorate %28 Location 0 71 %2 = OpTypeVoid 72 %3 = OpTypeFunction %2 73 %6 = OpTypeInt 32 0 74 %7 = OpTypePointer Function %6 75 %9 = OpTypeStruct %6 76 %10 = OpTypePointer Uniform %9 77 %11 = OpVariable %10 Uniform 78 %12 = OpTypeInt 32 1 79 %13 = OpConstant %12 0 80 %14 = OpTypePointer Uniform %6 81 %17 = OpConstant %6 1 82 %20 = OpConstant %6 2 83 %21 = OpTypeBool 84 %25 = OpTypeFloat 32 85 %26 = OpTypeVector %25 4 86 %27 = OpTypePointer Output %26 87 %28 = OpVariable %27 Output 88 %29 = OpConstant %25 1 89 %30 = OpConstant %25 0 90 %31 = OpConstantComposite %26 %29 %30 %30 %29 91 %33 = OpConstantComposite %26 %30 %30 %30 %30 92 %4 = OpFunction %2 None %3 93 %5 = OpLabel 94 %8 = OpVariable %7 Function 95 %15 = OpAccessChain %14 %11 %13 96 %16 = OpLoad %6 %15 97 %18 = OpUDiv %6 %16 %17 98 OpStore %8 %18 99 %19 = OpLoad %6 %8 100 %22 = OpIEqual %21 %19 %20 101 OpSelectionMerge %24 None 102 OpBranchConditional %22 %23 %32 103 %23 = OpLabel 104 OpStore %28 %31 105 OpBranch %24 106 %32 = OpLabel 107 OpStore %28 %33 108 OpBranch %24 109 %24 = OpLabel 110 OpReturn 111 OpFunctionEnd 112END 113 114# uniforms for variant 115 116# two 117BUFFER variant_two DATA_TYPE uint32 DATA 118 2 119END 120 121BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 122 123PIPELINE graphics variant_pipeline 124 ATTACH variant_vertex_shader 125 ATTACH variant_fragment_shader 126 FRAMEBUFFER_SIZE 256 256 127 BIND BUFFER variant_framebuffer AS color LOCATION 0 128 BIND BUFFER variant_two AS uniform DESCRIPTOR_SET 0 BINDING 0 129END 130CLEAR_COLOR variant_pipeline 0 0 0 255 131 132CLEAR variant_pipeline 133RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 134 135EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 136