1#!amber
2
3# Copyright 2022 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 the GraphicsFuzz project.
19
20# Short description: A fragment shader that covers specific LLVM code paths
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 320 es
28# #define _int_1 _GLF_uniform_int_values[0]
29# #define _int_0 _GLF_uniform_int_values[1]
30# #define _int_2 _GLF_uniform_int_values[2]
31#
32# precision highp float;
33# precision highp int;
34#
35# // Contents of _GLF_uniform_int_values: [1, 0, 2]
36# layout(set = 0, binding = 0) uniform buf0
37# {
38#     int _GLF_uniform_int_values[3];
39# };
40#
41# layout(location = 0) out vec4 _GLF_color;
42#
43# void main()
44# {
45#     int arr[10] = int[10](30989, 0, 0, 0, 0, 0, 0, 0, 0, 1);
46#     int i = 0;
47#     int a = _int_0;
48#
49#     // Iterates twice.
50#     while(i != 1)
51#     {
52#         // The first iteration sets i to arr[0] = 30989, and the second iteration sets i to arr[9] = 1.
53#         i = arr[clamp(i, 0, 10 - 1)];
54#         a++;
55#     }
56#
57#     // Always true.
58#     if(a == _int_2)
59#     {
60#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
61#     }
62#     else
63#     {
64#         _GLF_color = vec4(_int_0);
65#     }
66# }
67SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
68; SPIR-V
69; Version: 1.0
70; Generator: Khronos Glslang Reference Front End; 10
71; Bound: 71
72; Schema: 0
73               OpCapability Shader
74          %1 = OpExtInstImport "GLSL.std.450"
75               OpMemoryModel Logical GLSL450
76               OpEntryPoint Fragment %4 "main" %52
77               OpExecutionMode %4 OriginUpperLeft
78               OpSource ESSL 320
79               OpName %4 "main"
80               OpName %11 "arr"
81               OpName %17 "i"
82               OpName %18 "a"
83               OpName %21 "buf0"
84               OpMemberName %21 0 "_GLF_uniform_int_values"
85               OpName %23 ""
86               OpName %52 "_GLF_color"
87               OpDecorate %20 ArrayStride 16
88               OpMemberDecorate %21 0 Offset 0
89               OpDecorate %21 Block
90               OpDecorate %23 DescriptorSet 0
91               OpDecorate %23 Binding 0
92               OpDecorate %52 Location 0
93          %2 = OpTypeVoid
94          %3 = OpTypeFunction %2
95          %6 = OpTypeInt 32 1
96          %7 = OpTypeInt 32 0
97          %8 = OpConstant %7 10
98          %9 = OpTypeArray %6 %8
99         %10 = OpTypePointer Function %9
100         %12 = OpConstant %6 30989
101         %13 = OpConstant %6 0
102         %14 = OpConstant %6 1
103         %15 = OpConstantComposite %9 %12 %13 %13 %13 %13 %13 %13 %13 %13 %14
104         %16 = OpTypePointer Function %6
105         %19 = OpConstant %7 3
106         %20 = OpTypeArray %6 %19
107         %21 = OpTypeStruct %20
108         %22 = OpTypePointer Uniform %21
109         %23 = OpVariable %22 Uniform
110         %24 = OpTypePointer Uniform %6
111         %33 = OpTypeBool
112         %36 = OpConstant %6 9
113         %43 = OpConstant %6 2
114         %49 = OpTypeFloat 32
115         %50 = OpTypeVector %49 4
116         %51 = OpTypePointer Output %50
117         %52 = OpVariable %51 Output
118          %4 = OpFunction %2 None %3
119          %5 = OpLabel
120         %11 = OpVariable %10 Function
121         %17 = OpVariable %16 Function
122         %18 = OpVariable %16 Function
123               OpStore %11 %15
124               OpStore %17 %13
125         %25 = OpAccessChain %24 %23 %13 %14
126         %26 = OpLoad %6 %25
127               OpStore %18 %26
128               OpBranch %27
129         %27 = OpLabel
130               OpLoopMerge %29 %30 None
131               OpBranch %31
132         %31 = OpLabel
133         %32 = OpLoad %6 %17
134         %34 = OpINotEqual %33 %32 %14
135               OpBranchConditional %34 %28 %29
136         %28 = OpLabel
137         %35 = OpLoad %6 %17
138         %37 = OpExtInst %6 %1 SClamp %35 %13 %36
139         %38 = OpAccessChain %16 %11 %37
140         %39 = OpLoad %6 %38
141               OpStore %17 %39
142         %40 = OpLoad %6 %18
143         %41 = OpIAdd %6 %40 %14
144               OpStore %18 %41
145               OpBranch %30
146         %30 = OpLabel
147               OpBranch %27
148         %29 = OpLabel
149         %42 = OpLoad %6 %18
150         %44 = OpAccessChain %24 %23 %13 %43
151         %45 = OpLoad %6 %44
152         %46 = OpIEqual %33 %42 %45
153               OpSelectionMerge %48 None
154               OpBranchConditional %46 %47 %66
155         %47 = OpLabel
156         %53 = OpAccessChain %24 %23 %13 %13
157         %54 = OpLoad %6 %53
158         %55 = OpConvertSToF %49 %54
159         %56 = OpAccessChain %24 %23 %13 %14
160         %57 = OpLoad %6 %56
161         %58 = OpConvertSToF %49 %57
162         %59 = OpAccessChain %24 %23 %13 %14
163         %60 = OpLoad %6 %59
164         %61 = OpConvertSToF %49 %60
165         %62 = OpAccessChain %24 %23 %13 %13
166         %63 = OpLoad %6 %62
167         %64 = OpConvertSToF %49 %63
168         %65 = OpCompositeConstruct %50 %55 %58 %61 %64
169               OpStore %52 %65
170               OpBranch %48
171         %66 = OpLabel
172         %67 = OpAccessChain %24 %23 %13 %14
173         %68 = OpLoad %6 %67
174         %69 = OpConvertSToF %49 %68
175         %70 = OpCompositeConstruct %50 %69 %69 %69 %69
176               OpStore %52 %70
177               OpBranch %48
178         %48 = OpLabel
179               OpReturn
180               OpFunctionEnd
181END
182
183# uniforms for variant
184
185# _GLF_uniform_int_values
186BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
187 1 0 2
188END
189
190BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
191
192PIPELINE graphics variant_pipeline
193  ATTACH variant_vertex_shader
194  ATTACH variant_fragment_shader
195  FRAMEBUFFER_SIZE 32 32
196  BIND BUFFER variant_framebuffer AS color LOCATION 0
197  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
198END
199CLEAR_COLOR variant_pipeline 0 0 0 255
200
201CLEAR variant_pipeline
202RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
203
204EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
205