3 # Copyright 2020 Google LLC
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
9 # http://www.apache.org/licenses/LICENSE-2.0
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.
18 # A test for a coverage-gap found by GraphicsFuzz.
20 # Short description: A fragment shader that covers a specific instruction folding path.
22 # The test passes because shader always writes red.
24 SHADER vertex variant_vertex_shader PASSTHROUGH
26 # variant_fragment_shader is derived from the following GLSL:
28 # precision highp float;
29 # precision highp int;
31 # layout(location = 0) out vec4 _GLF_color;
32 # layout(set = 0, binding = 0) uniform buf0
48 # _GLF_color = vec4(1, 0, 0, 1);
50 # _GLF_color = vec4(0);
52 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
55 ; Generator: Khronos Glslang Reference Front End; 8
59 %1 = OpExtInstImport "GLSL.std.450"
60 OpMemoryModel Logical GLSL450
61 OpEntryPoint Fragment %4 "main" %37
62 OpExecutionMode %4 OriginUpperLeft
67 OpMemberName %9 0 "five"
69 OpName %37 "_GLF_color"
70 OpMemberDecorate %9 0 Offset 0
72 OpDecorate %11 DescriptorSet 0
73 OpDecorate %11 Binding 0
74 OpDecorate %37 Location 0
76 %3 = OpTypeFunction %2
78 %7 = OpTypePointer Function %6
80 %10 = OpTypePointer Uniform %9
81 %11 = OpVariable %10 Uniform
83 %13 = OpTypePointer Uniform %6
86 %30 = OpConstant %6 -1
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
97 %8 = OpVariable %7 Function
98 %14 = OpAccessChain %13 %11 %12
103 OpLoopMerge %18 %19 None
107 %23 = OpSGreaterThan %22 %21 %12
108 OpBranchConditional %23 %17 %18
111 %26 = OpISub %6 %24 %25
114 %28 = OpISub %6 %27 %25
121 %31 = OpIEqual %22 %29 %30
122 OpSelectionMerge %33 None
123 OpBranchConditional %31 %32 %41
135 # uniforms for variant
138 BUFFER variant_five DATA_TYPE int32 DATA
142 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
144 PIPELINE 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
151 CLEAR_COLOR variant_pipeline 0 0 0 255
153 CLEAR variant_pipeline
154 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
156 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255