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# 30# layout(location = 0) out vec4 _GLF_color; 31# 32# layout(set = 0, binding = 0) uniform buf0 33# { 34# float three; 35# }; 36# 37# void main() 38# { 39# // f becomes 3.0 * 2^0 = 3.0. 40# float f = ldexp(three, 0); 41# 42# if (f == 3.0) 43# _GLF_color = vec4(1, 0, 0, 1); 44# else 45# _GLF_color = vec4(0); 46# } 47SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 48; SPIR-V 49; Version: 1.0 50; Generator: Khronos Glslang Reference Front End; 8 51; Bound: 32 52; Schema: 0 53 OpCapability Shader 54 %1 = OpExtInstImport "GLSL.std.450" 55 OpMemoryModel Logical GLSL450 56 OpEntryPoint Fragment %4 "main" %26 57 OpExecutionMode %4 OriginUpperLeft 58 OpSource ESSL 310 59 OpName %4 "main" 60 OpName %8 "f" 61 OpName %9 "buf0" 62 OpMemberName %9 0 "three" 63 OpName %11 "" 64 OpName %26 "_GLF_color" 65 OpMemberDecorate %9 0 Offset 0 66 OpDecorate %9 Block 67 OpDecorate %11 DescriptorSet 0 68 OpDecorate %11 Binding 0 69 OpDecorate %26 Location 0 70 %2 = OpTypeVoid 71 %3 = OpTypeFunction %2 72 %6 = OpTypeFloat 32 73 %7 = OpTypePointer Function %6 74 %9 = OpTypeStruct %6 75 %10 = OpTypePointer Uniform %9 76 %11 = OpVariable %10 Uniform 77 %12 = OpTypeInt 32 1 78 %13 = OpConstant %12 0 79 %14 = OpTypePointer Uniform %6 80 %19 = OpConstant %6 3 81 %20 = OpTypeBool 82 %24 = OpTypeVector %6 4 83 %25 = OpTypePointer Output %24 84 %26 = OpVariable %25 Output 85 %27 = OpConstant %6 1 86 %28 = OpConstant %6 0 87 %29 = OpConstantComposite %24 %27 %28 %28 %27 88 %31 = OpConstantComposite %24 %28 %28 %28 %28 89 %4 = OpFunction %2 None %3 90 %5 = OpLabel 91 %8 = OpVariable %7 Function 92 %15 = OpAccessChain %14 %11 %13 93 %16 = OpLoad %6 %15 94 %17 = OpExtInst %6 %1 Ldexp %16 %13 95 OpStore %8 %17 96 %18 = OpLoad %6 %8 97 %21 = OpFOrdEqual %20 %18 %19 98 OpSelectionMerge %23 None 99 OpBranchConditional %21 %22 %30 100 %22 = OpLabel 101 OpStore %26 %29 102 OpBranch %23 103 %30 = OpLabel 104 OpStore %26 %31 105 OpBranch %23 106 %23 = OpLabel 107 OpReturn 108 OpFunctionEnd 109END 110 111# uniforms for variant 112 113# three 114BUFFER variant_three DATA_TYPE float DATA 115 3.0 116END 117 118BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 119 120PIPELINE graphics variant_pipeline 121 ATTACH variant_vertex_shader 122 ATTACH variant_fragment_shader 123 FRAMEBUFFER_SIZE 256 256 124 BIND BUFFER variant_framebuffer AS color LOCATION 0 125 BIND BUFFER variant_three AS uniform DESCRIPTOR_SET 0 BINDING 0 126END 127CLEAR_COLOR variant_pipeline 0 0 0 255 128 129CLEAR variant_pipeline 130RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 131 132EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 133