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#
30# layout(location = 0) out vec4 _GLF_color;
31# layout(set = 0, binding = 0) uniform buf0
32# {
33#     vec2 zeroOne;
34# };
35#
36# void main()
37# {
38#     // Since zeroOne is (0, 1) the results will be (2, 5).
39#     vec2 v = mix(vec2(2, 3), vec2(4, 5), zeroOne);
40#     float d = distance(v, vec2(2, 5));
41#
42#     if (d < 0.1)
43#         _GLF_color = vec4(v.x - 1.0, v.y - 5.0, 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: 53
52; Schema: 0
53               OpCapability Shader
54          %1 = OpExtInstImport "GLSL.std.450"
55               OpMemoryModel Logical GLSL450
56               OpEntryPoint Fragment %4 "main" %38
57               OpExecutionMode %4 OriginUpperLeft
58               OpSource ESSL 310
59               OpName %4 "main"
60               OpName %9 "v"
61               OpName %16 "buf0"
62               OpMemberName %16 0 "zeroOne"
63               OpName %18 ""
64               OpName %26 "d"
65               OpName %38 "_GLF_color"
66               OpMemberDecorate %16 0 Offset 0
67               OpDecorate %16 Block
68               OpDecorate %18 DescriptorSet 0
69               OpDecorate %18 Binding 0
70               OpDecorate %38 Location 0
71          %2 = OpTypeVoid
72          %3 = OpTypeFunction %2
73          %6 = OpTypeFloat 32
74          %7 = OpTypeVector %6 2
75          %8 = OpTypePointer Function %7
76         %10 = OpConstant %6 2
77         %11 = OpConstant %6 3
78         %12 = OpConstantComposite %7 %10 %11
79         %13 = OpConstant %6 4
80         %14 = OpConstant %6 5
81         %15 = OpConstantComposite %7 %13 %14
82         %16 = OpTypeStruct %7
83         %17 = OpTypePointer Uniform %16
84         %18 = OpVariable %17 Uniform
85         %19 = OpTypeInt 32 1
86         %20 = OpConstant %19 0
87         %21 = OpTypePointer Uniform %7
88         %25 = OpTypePointer Function %6
89         %28 = OpConstantComposite %7 %10 %14
90         %31 = OpConstant %6 0.100000001
91         %32 = OpTypeBool
92         %36 = OpTypeVector %6 4
93         %37 = OpTypePointer Output %36
94         %38 = OpVariable %37 Output
95         %39 = OpTypeInt 32 0
96         %40 = OpConstant %39 0
97         %43 = OpConstant %6 1
98         %45 = OpConstant %39 1
99         %49 = OpConstant %6 0
100         %52 = OpConstantComposite %36 %49 %49 %49 %49
101          %4 = OpFunction %2 None %3
102          %5 = OpLabel
103          %9 = OpVariable %8 Function
104         %26 = OpVariable %25 Function
105         %22 = OpAccessChain %21 %18 %20
106         %23 = OpLoad %7 %22
107         %24 = OpExtInst %7 %1 FMix %12 %15 %23
108               OpStore %9 %24
109         %27 = OpLoad %7 %9
110         %29 = OpExtInst %6 %1 Distance %27 %28
111               OpStore %26 %29
112         %30 = OpLoad %6 %26
113         %33 = OpFOrdLessThan %32 %30 %31
114               OpSelectionMerge %35 None
115               OpBranchConditional %33 %34 %51
116         %34 = OpLabel
117         %41 = OpAccessChain %25 %9 %40
118         %42 = OpLoad %6 %41
119         %44 = OpFSub %6 %42 %43
120         %46 = OpAccessChain %25 %9 %45
121         %47 = OpLoad %6 %46
122         %48 = OpFSub %6 %47 %14
123         %50 = OpCompositeConstruct %36 %44 %48 %49 %43
124               OpStore %38 %50
125               OpBranch %35
126         %51 = OpLabel
127               OpStore %38 %52
128               OpBranch %35
129         %35 = OpLabel
130               OpReturn
131               OpFunctionEnd
132END
133
134# uniforms for variant
135
136# zeroOne
137BUFFER variant_zeroOne DATA_TYPE vec2<float> DATA
138 0.0 1.0
139END
140
141BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
142
143PIPELINE graphics variant_pipeline
144  ATTACH variant_vertex_shader
145  ATTACH variant_fragment_shader
146  FRAMEBUFFER_SIZE 256 256
147  BIND BUFFER variant_framebuffer AS color LOCATION 0
148  BIND BUFFER variant_zeroOne AS uniform DESCRIPTOR_SET 0 BINDING 0
149END
150CLEAR_COLOR variant_pipeline 0 0 0 255
151
152CLEAR variant_pipeline
153RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
154
155EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
156