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# precision highp int;
30#
31# layout(set = 0, binding = 0) uniform buf0
32# {
33#     int two;
34# };
35# layout(location = 0) out vec4 _GLF_color;
36#
37# void main()
38# {
39#     int i = 0;
40#
41#     for(int r = 0; r < two * 4; r += 2)
42#         i += ivec4(1, 2, 3, 4)[r / two];
43#
44#     if (i == 10)
45#         _GLF_color = vec4(1, 0, 0, 1);
46#     else
47#         _GLF_color = vec4(0);
48# }
49SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
50; SPIR-V
51; Version: 1.0
52; Generator: Khronos Glslang Reference Front End; 8
53; Bound: 55
54; Schema: 0
55               OpCapability Shader
56          %1 = OpExtInstImport "GLSL.std.450"
57               OpMemoryModel Logical GLSL450
58               OpEntryPoint Fragment %4 "main" %49
59               OpExecutionMode %4 OriginUpperLeft
60               OpSource ESSL 310
61               OpName %4 "main"
62               OpName %8 "i"
63               OpName %10 "r"
64               OpName %17 "buf0"
65               OpMemberName %17 0 "two"
66               OpName %19 ""
67               OpName %49 "_GLF_color"
68               OpMemberDecorate %17 0 Offset 0
69               OpDecorate %17 Block
70               OpDecorate %19 DescriptorSet 0
71               OpDecorate %19 Binding 0
72               OpDecorate %49 Location 0
73          %2 = OpTypeVoid
74          %3 = OpTypeFunction %2
75          %6 = OpTypeInt 32 1
76          %7 = OpTypePointer Function %6
77          %9 = OpConstant %6 0
78         %17 = OpTypeStruct %6
79         %18 = OpTypePointer Uniform %17
80         %19 = OpVariable %18 Uniform
81         %20 = OpTypePointer Uniform %6
82         %23 = OpConstant %6 4
83         %25 = OpTypeBool
84         %27 = OpTypeVector %6 4
85         %28 = OpConstant %6 1
86         %29 = OpConstant %6 2
87         %30 = OpConstant %6 3
88         %31 = OpConstantComposite %27 %28 %29 %30 %23
89         %42 = OpConstant %6 10
90         %46 = OpTypeFloat 32
91         %47 = OpTypeVector %46 4
92         %48 = OpTypePointer Output %47
93         %49 = OpVariable %48 Output
94         %50 = OpConstant %46 1
95         %51 = OpConstant %46 0
96         %52 = OpConstantComposite %47 %50 %51 %51 %50
97         %54 = OpConstantComposite %47 %51 %51 %51 %51
98          %4 = OpFunction %2 None %3
99          %5 = OpLabel
100          %8 = OpVariable %7 Function
101         %10 = OpVariable %7 Function
102               OpStore %8 %9
103               OpStore %10 %9
104               OpBranch %11
105         %11 = OpLabel
106               OpLoopMerge %13 %14 None
107               OpBranch %15
108         %15 = OpLabel
109         %16 = OpLoad %6 %10
110         %21 = OpAccessChain %20 %19 %9
111         %22 = OpLoad %6 %21
112         %24 = OpIMul %6 %22 %23
113         %26 = OpSLessThan %25 %16 %24
114               OpBranchConditional %26 %12 %13
115         %12 = OpLabel
116         %32 = OpLoad %6 %10
117         %33 = OpAccessChain %20 %19 %9
118         %34 = OpLoad %6 %33
119         %35 = OpSDiv %6 %32 %34
120         %36 = OpVectorExtractDynamic %6 %31 %35
121         %37 = OpLoad %6 %8
122         %38 = OpIAdd %6 %37 %36
123               OpStore %8 %38
124               OpBranch %14
125         %14 = OpLabel
126         %39 = OpLoad %6 %10
127         %40 = OpIAdd %6 %39 %29
128               OpStore %10 %40
129               OpBranch %11
130         %13 = OpLabel
131         %41 = OpLoad %6 %8
132         %43 = OpIEqual %25 %41 %42
133               OpSelectionMerge %45 None
134               OpBranchConditional %43 %44 %53
135         %44 = OpLabel
136               OpStore %49 %52
137               OpBranch %45
138         %53 = OpLabel
139               OpStore %49 %54
140               OpBranch %45
141         %45 = OpLabel
142               OpReturn
143               OpFunctionEnd
144END
145
146# uniforms for variant
147
148# two
149BUFFER variant_two DATA_TYPE int32 DATA
150 2
151END
152
153BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
154
155PIPELINE graphics variant_pipeline
156  ATTACH variant_vertex_shader
157  ATTACH variant_fragment_shader
158  FRAMEBUFFER_SIZE 256 256
159  BIND BUFFER variant_framebuffer AS color LOCATION 0
160  BIND BUFFER variant_two AS uniform DESCRIPTOR_SET 0 BINDING 0
161END
162CLEAR_COLOR variant_pipeline 0 0 0 255
163
164CLEAR variant_pipeline
165RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
166
167EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
168