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# 33# layout(set = 0, binding = 0) uniform buf0 34# { 35# int one; 36# }; 37# 38# void main() 39# { 40# int x = -(5 - one); 41# 42# if (x == -4) 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: 34 52; Schema: 0 53 OpCapability Shader 54 %1 = OpExtInstImport "GLSL.std.450" 55 OpMemoryModel Logical GLSL450 56 OpEntryPoint Fragment %4 "main" %28 57 OpExecutionMode %4 OriginUpperLeft 58 OpSource ESSL 310 59 OpName %4 "main" 60 OpName %8 "x" 61 OpName %10 "buf0" 62 OpMemberName %10 0 "one" 63 OpName %12 "" 64 OpName %28 "_GLF_color" 65 OpMemberDecorate %10 0 Offset 0 66 OpDecorate %10 Block 67 OpDecorate %12 DescriptorSet 0 68 OpDecorate %12 Binding 0 69 OpDecorate %28 Location 0 70 %2 = OpTypeVoid 71 %3 = OpTypeFunction %2 72 %6 = OpTypeInt 32 1 73 %7 = OpTypePointer Function %6 74 %9 = OpConstant %6 5 75 %10 = OpTypeStruct %6 76 %11 = OpTypePointer Uniform %10 77 %12 = OpVariable %11 Uniform 78 %13 = OpConstant %6 0 79 %14 = OpTypePointer Uniform %6 80 %20 = OpConstant %6 -4 81 %21 = OpTypeBool 82 %25 = OpTypeFloat 32 83 %26 = OpTypeVector %25 4 84 %27 = OpTypePointer Output %26 85 %28 = OpVariable %27 Output 86 %29 = OpConstant %25 1 87 %30 = OpConstant %25 0 88 %31 = OpConstantComposite %26 %29 %30 %30 %29 89 %33 = OpConstantComposite %26 %30 %30 %30 %30 90 %4 = OpFunction %2 None %3 91 %5 = OpLabel 92 %8 = OpVariable %7 Function 93 %15 = OpAccessChain %14 %12 %13 94 %16 = OpLoad %6 %15 95 %17 = OpISub %6 %9 %16 96 %18 = OpSNegate %6 %17 97 OpStore %8 %18 98 %19 = OpLoad %6 %8 99 %22 = OpIEqual %21 %19 %20 100 OpSelectionMerge %24 None 101 OpBranchConditional %22 %23 %32 102 %23 = OpLabel 103 OpStore %28 %31 104 OpBranch %24 105 %32 = OpLabel 106 OpStore %28 %33 107 OpBranch %24 108 %24 = OpLabel 109 OpReturn 110 OpFunctionEnd 111END 112 113# uniforms for variant 114 115# one 116BUFFER variant_one DATA_TYPE int32 DATA 117 1 118END 119 120BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 121 122PIPELINE graphics variant_pipeline 123 ATTACH variant_vertex_shader 124 ATTACH variant_fragment_shader 125 FRAMEBUFFER_SIZE 256 256 126 BIND BUFFER variant_framebuffer AS color LOCATION 0 127 BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0 128END 129CLEAR_COLOR variant_pipeline 0 0 0 255 130 131CLEAR variant_pipeline 132RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 133 134EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 135