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 folding path. 21 22# The test passes because 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# layout(set = 0, binding = 0) uniform buf0 33# { 34# int five; 35# }; 36# 37# void main() 38# { 39# int i = five; 40# 41# while(i > 0) 42# { 43# i--; 44# i--; 45# } 46# 47# if (i == -1) 48# _GLF_color = vec4(1, 0, 0, 1); 49# else 50# _GLF_color = vec4(0); 51# } 52SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 53; SPIR-V 54; Version: 1.0 55; Generator: Khronos Glslang Reference Front End; 8 56; Bound: 43 57; Schema: 0 58 OpCapability Shader 59 %1 = OpExtInstImport "GLSL.std.450" 60 OpMemoryModel Logical GLSL450 61 OpEntryPoint Fragment %4 "main" %37 62 OpExecutionMode %4 OriginUpperLeft 63 OpSource ESSL 310 64 OpName %4 "main" 65 OpName %8 "i" 66 OpName %9 "buf0" 67 OpMemberName %9 0 "five" 68 OpName %11 "" 69 OpName %37 "_GLF_color" 70 OpMemberDecorate %9 0 Offset 0 71 OpDecorate %9 Block 72 OpDecorate %11 DescriptorSet 0 73 OpDecorate %11 Binding 0 74 OpDecorate %37 Location 0 75 %2 = OpTypeVoid 76 %3 = OpTypeFunction %2 77 %6 = OpTypeInt 32 1 78 %7 = OpTypePointer Function %6 79 %9 = OpTypeStruct %6 80 %10 = OpTypePointer Uniform %9 81 %11 = OpVariable %10 Uniform 82 %12 = OpConstant %6 0 83 %13 = OpTypePointer Uniform %6 84 %22 = OpTypeBool 85 %25 = OpConstant %6 1 86 %30 = 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 %14 = OpAccessChain %13 %11 %12 99 %15 = OpLoad %6 %14 100 OpStore %8 %15 101 OpBranch %16 102 %16 = OpLabel 103 OpLoopMerge %18 %19 None 104 OpBranch %20 105 %20 = OpLabel 106 %21 = OpLoad %6 %8 107 %23 = OpSGreaterThan %22 %21 %12 108 OpBranchConditional %23 %17 %18 109 %17 = OpLabel 110 %24 = OpLoad %6 %8 111 %26 = OpISub %6 %24 %25 112 OpStore %8 %26 113 %27 = OpLoad %6 %8 114 %28 = OpISub %6 %27 %25 115 OpStore %8 %28 116 OpBranch %19 117 %19 = OpLabel 118 OpBranch %16 119 %18 = OpLabel 120 %29 = OpLoad %6 %8 121 %31 = OpIEqual %22 %29 %30 122 OpSelectionMerge %33 None 123 OpBranchConditional %31 %32 %41 124 %32 = OpLabel 125 OpStore %37 %40 126 OpBranch %33 127 %41 = OpLabel 128 OpStore %37 %42 129 OpBranch %33 130 %33 = OpLabel 131 OpReturn 132 OpFunctionEnd 133END 134 135# uniforms for variant 136 137# five 138BUFFER variant_five DATA_TYPE int32 DATA 139 5 140END 141 142BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 143 144PIPELINE graphics variant_pipeline 145 ATTACH variant_vertex_shader 146 ATTACH variant_fragment_shader 147 FRAMEBUFFER_SIZE 256 256 148 BIND BUFFER variant_framebuffer AS color LOCATION 0 149 BIND BUFFER variant_five AS uniform DESCRIPTOR_SET 0 BINDING 0 150END 151CLEAR_COLOR variant_pipeline 0 0 0 255 152 153CLEAR variant_pipeline 154RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 155 156EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 157