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1#!amber
2
3# Copyright 2019 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 bug found by GraphicsFuzz.
19
20# Short description: A fragment shader with an expression used in two discard guards
21
22# The test passes because most of the code never executes; the shader just writes the color 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(set = 0, binding = 0) uniform buf0
32# {
33#   vec2 injectionSwitch;
34# };
35# layout(location = 0) out vec4 _GLF_color;
36#
37# mediump vec4 gv;
38#
39# void main()
40# {
41#   if (injectionSwitch.x > 2.0) // always false
42#   {
43#     int temp = int(max(mix(vec4(1.0), vec4(1.0), gv), 8.6)[1]);
44#
45#     if (temp < 150)
46#     {
47#       discard;
48#     }
49#
50#     if (temp < 180)
51#     {
52#       discard;
53#     }
54#   }
55#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
56# }
57SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
58; SPIR-V
59; Version: 1.0
60; Generator: Khronos Glslang Reference Front End; 7
61; Bound: 54
62; Schema: 0
63               OpCapability Shader
64          %1 = OpExtInstImport "GLSL.std.450"
65               OpMemoryModel Logical GLSL450
66               OpEntryPoint Fragment %4 "main" %51
67               OpExecutionMode %4 OriginUpperLeft
68               OpSource ESSL 310
69               OpName %4 "main"
70               OpName %8 "buf0"
71               OpMemberName %8 0 "injectionSwitch"
72               OpName %10 ""
73               OpName %24 "temp"
74               OpName %29 "gv"
75               OpName %51 "_GLF_color"
76               OpMemberDecorate %8 0 Offset 0
77               OpDecorate %8 Block
78               OpDecorate %10 DescriptorSet 0
79               OpDecorate %10 Binding 0
80               OpDecorate %29 RelaxedPrecision
81               OpDecorate %30 RelaxedPrecision
82               OpDecorate %31 RelaxedPrecision
83               OpDecorate %33 RelaxedPrecision
84               OpDecorate %34 RelaxedPrecision
85               OpDecorate %36 RelaxedPrecision
86               OpDecorate %51 Location 0
87          %2 = OpTypeVoid
88          %3 = OpTypeFunction %2
89          %6 = OpTypeFloat 32
90          %7 = OpTypeVector %6 2
91          %8 = OpTypeStruct %7
92          %9 = OpTypePointer Uniform %8
93         %10 = OpVariable %9 Uniform
94         %11 = OpTypeInt 32 1
95         %12 = OpConstant %11 0
96         %13 = OpTypeInt 32 0
97         %14 = OpConstant %13 0
98         %15 = OpTypePointer Uniform %6
99         %18 = OpConstant %6 2
100         %19 = OpTypeBool
101         %23 = OpTypePointer Function %11
102         %25 = OpTypeVector %6 4
103         %26 = OpConstant %6 1
104         %27 = OpConstantComposite %25 %26 %26 %26 %26
105         %28 = OpTypePointer Private %25
106         %29 = OpVariable %28 Private
107         %32 = OpConstant %6 8.60000038
108         %35 = OpConstant %13 1
109         %39 = OpConstant %11 150
110         %45 = OpConstant %11 180
111         %50 = OpTypePointer Output %25
112         %51 = OpVariable %50 Output
113         %52 = OpConstant %6 0
114         %53 = OpConstantComposite %25 %26 %52 %52 %26
115          %4 = OpFunction %2 None %3
116          %5 = OpLabel
117         %24 = OpVariable %23 Function
118         %16 = OpAccessChain %15 %10 %12 %14
119         %17 = OpLoad %6 %16
120         %20 = OpFOrdGreaterThan %19 %17 %18
121               OpSelectionMerge %22 None
122               OpBranchConditional %20 %21 %22
123         %21 = OpLabel
124         %30 = OpLoad %25 %29
125         %31 = OpExtInst %25 %1 FMix %27 %27 %30
126         %33 = OpCompositeConstruct %25 %32 %32 %32 %32
127         %34 = OpExtInst %25 %1 FMax %31 %33
128         %36 = OpCompositeExtract %6 %34 1
129         %37 = OpConvertFToS %11 %36
130               OpStore %24 %37
131         %38 = OpLoad %11 %24
132         %40 = OpSLessThan %19 %38 %39
133               OpSelectionMerge %42 None
134               OpBranchConditional %40 %41 %42
135         %41 = OpLabel
136               OpKill
137         %42 = OpLabel
138         %44 = OpLoad %11 %24
139         %46 = OpSLessThan %19 %44 %45
140               OpSelectionMerge %48 None
141               OpBranchConditional %46 %47 %48
142         %47 = OpLabel
143               OpKill
144         %48 = OpLabel
145               OpBranch %22
146         %22 = OpLabel
147               OpStore %51 %53
148               OpReturn
149               OpFunctionEnd
150END
151
152# uniforms for variant
153
154# injectionSwitch
155BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
156 0.0 1.0
157END
158
159BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
160
161PIPELINE graphics variant_pipeline
162  ATTACH variant_vertex_shader
163  ATTACH variant_fragment_shader
164  FRAMEBUFFER_SIZE 256 256
165  BIND BUFFER variant_framebuffer AS color LOCATION 0
166  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
167END
168CLEAR_COLOR variant_pipeline 0 0 0 255
169
170CLEAR variant_pipeline
171RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
172
173EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
174