1#!amber
2
3# Copyright 2021 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_0 _GLF_uniform_int_values[0]
29# #define _int_1 _GLF_uniform_int_values[1]
30# #define _float_2_0 _GLF_uniform_float_values[0]
31#
32# precision highp float;
33# precision highp int;
34#
35# // Contents of _GLF_uniform_float_values: 2.0
36# layout(set = 0, binding = 0) uniform buf0
37# {
38#     float _GLF_uniform_float_values[1];
39# };
40#
41# // Contents of _GLF_uniform_int_values: [0, 1]
42# layout(set = 0, binding = 1) uniform buf1
43# {
44#     int _GLF_uniform_int_values[2];
45# };
46#
47# const int _GLF_global_loop_bound = 10;
48# int _GLF_global_loop_count = 0;
49#
50# layout(location = 0) out vec4 _GLF_color;
51#
52# // Contents of one: 1.0
53# layout(set = 0, binding = 2) uniform buf2
54# {
55#     float one;
56# };
57#
58# void main()
59# {
60#     // Iterated once.
61#     do
62#     {
63#         _GLF_global_loop_count++;
64#     }
65#     while((one < _float_2_0 ? 1 : 0) > 1 && _GLF_global_loop_count < _GLF_global_loop_bound);
66#
67#     // Always true.
68#     if(_GLF_global_loop_count == _int_1)
69#     {
70#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
71#     }
72#     else
73#     {
74#         _GLF_color = vec4(_int_0);
75#     }
76# }
77SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
78; SPIR-V
79; Version: 1.0
80; Generator: Khronos Glslang Reference Front End; 10
81; Bound: 73
82; Schema: 0
83               OpCapability Shader
84          %1 = OpExtInstImport "GLSL.std.450"
85               OpMemoryModel Logical GLSL450
86               OpEntryPoint Fragment %4 "main" %54
87               OpExecutionMode %4 OriginUpperLeft
88               OpSource ESSL 320
89               OpName %4 "main"
90               OpName %8 "_GLF_global_loop_count"
91               OpName %18 "buf2"
92               OpMemberName %18 0 "one"
93               OpName %20 ""
94               OpName %27 "buf0"
95               OpMemberName %27 0 "_GLF_uniform_float_values"
96               OpName %29 ""
97               OpName %43 "buf1"
98               OpMemberName %43 0 "_GLF_uniform_int_values"
99               OpName %45 ""
100               OpName %54 "_GLF_color"
101               OpMemberDecorate %18 0 Offset 0
102               OpDecorate %18 Block
103               OpDecorate %20 DescriptorSet 0
104               OpDecorate %20 Binding 2
105               OpDecorate %26 ArrayStride 16
106               OpMemberDecorate %27 0 Offset 0
107               OpDecorate %27 Block
108               OpDecorate %29 DescriptorSet 0
109               OpDecorate %29 Binding 0
110               OpDecorate %42 ArrayStride 16
111               OpMemberDecorate %43 0 Offset 0
112               OpDecorate %43 Block
113               OpDecorate %45 DescriptorSet 0
114               OpDecorate %45 Binding 1
115               OpDecorate %54 Location 0
116          %2 = OpTypeVoid
117          %3 = OpTypeFunction %2
118          %6 = OpTypeInt 32 1
119          %7 = OpTypePointer Private %6
120          %8 = OpVariable %7 Private
121          %9 = OpConstant %6 0
122         %15 = OpConstant %6 1
123         %17 = OpTypeFloat 32
124         %18 = OpTypeStruct %17
125         %19 = OpTypePointer Uniform %18
126         %20 = OpVariable %19 Uniform
127         %21 = OpTypePointer Uniform %17
128         %24 = OpTypeInt 32 0
129         %25 = OpConstant %24 1
130         %26 = OpTypeArray %17 %25
131         %27 = OpTypeStruct %26
132         %28 = OpTypePointer Uniform %27
133         %29 = OpVariable %28 Uniform
134         %32 = OpTypeBool
135         %37 = OpConstant %6 10
136         %41 = OpConstant %24 2
137         %42 = OpTypeArray %6 %41
138         %43 = OpTypeStruct %42
139         %44 = OpTypePointer Uniform %43
140         %45 = OpVariable %44 Uniform
141         %46 = OpTypePointer Uniform %6
142         %52 = OpTypeVector %17 4
143         %53 = OpTypePointer Output %52
144         %54 = OpVariable %53 Output
145          %4 = OpFunction %2 None %3
146          %5 = OpLabel
147               OpStore %8 %9
148               OpBranch %10
149         %10 = OpLabel
150               OpLoopMerge %12 %13 None
151               OpBranch %11
152         %11 = OpLabel
153         %14 = OpLoad %6 %8
154         %16 = OpIAdd %6 %14 %15
155               OpStore %8 %16
156               OpBranch %13
157         %13 = OpLabel
158         %22 = OpAccessChain %21 %20 %9
159         %23 = OpLoad %17 %22
160         %30 = OpAccessChain %21 %29 %9 %9
161         %31 = OpLoad %17 %30
162         %33 = OpFOrdLessThan %32 %23 %31
163         %34 = OpSelect %6 %33 %15 %9
164         %35 = OpSGreaterThan %32 %34 %15
165         %36 = OpLoad %6 %8
166         %38 = OpSLessThan %32 %36 %37
167         %39 = OpLogicalAnd %32 %35 %38
168               OpBranchConditional %39 %10 %12
169         %12 = OpLabel
170         %40 = OpLoad %6 %8
171         %47 = OpAccessChain %46 %45 %9 %15
172         %48 = OpLoad %6 %47
173         %49 = OpIEqual %32 %40 %48
174               OpSelectionMerge %51 None
175               OpBranchConditional %49 %50 %68
176         %50 = OpLabel
177         %55 = OpAccessChain %46 %45 %9 %15
178         %56 = OpLoad %6 %55
179         %57 = OpConvertSToF %17 %56
180         %58 = OpAccessChain %46 %45 %9 %9
181         %59 = OpLoad %6 %58
182         %60 = OpConvertSToF %17 %59
183         %61 = OpAccessChain %46 %45 %9 %9
184         %62 = OpLoad %6 %61
185         %63 = OpConvertSToF %17 %62
186         %64 = OpAccessChain %46 %45 %9 %15
187         %65 = OpLoad %6 %64
188         %66 = OpConvertSToF %17 %65
189         %67 = OpCompositeConstruct %52 %57 %60 %63 %66
190               OpStore %54 %67
191               OpBranch %51
192         %68 = OpLabel
193         %69 = OpAccessChain %46 %45 %9 %9
194         %70 = OpLoad %6 %69
195         %71 = OpConvertSToF %17 %70
196         %72 = OpCompositeConstruct %52 %71 %71 %71 %71
197               OpStore %54 %72
198               OpBranch %51
199         %51 = OpLabel
200               OpReturn
201               OpFunctionEnd
202END
203
204# uniforms for variant
205
206# one
207BUFFER variant_one DATA_TYPE float STD140 DATA
208 1.0
209END
210# _GLF_uniform_int_values
211BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
212 0 1
213END
214# _GLF_uniform_float_values
215BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
216 2.0
217END
218
219BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
220
221PIPELINE graphics variant_pipeline
222  ATTACH variant_vertex_shader
223  ATTACH variant_fragment_shader
224  FRAMEBUFFER_SIZE 256 256
225  BIND BUFFER variant_framebuffer AS color LOCATION 0
226  BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 2
227  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
228  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
229END
230CLEAR_COLOR variant_pipeline 0 0 0 255
231
232CLEAR variant_pipeline
233RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
234
235EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
236