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_1_0 _GLF_uniform_float_values[0]
31#
32# precision highp int;
33# precision highp float;
34#
35# // Contents of _GLF_uniform_float_values: 1.0
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# // Contents of quarter: 0.25
48# layout(set = 0, binding = 2) uniform buf2
49# {
50#     float quarter;
51# };
52#
53# layout(location = 0) out vec4 _GLF_color;
54#
55# void main()
56# {
57#     _GLF_color = vec4(_int_0);
58#
59#     for(int i = 1; i < 9; i++)
60#     {
61#         for(int j = 1; j < 10; j++)
62#         {
63#             if(i > _int_1)
64#             {
65#                 continue;
66#             }
67#
68#             // Always false.
69#             if(_float_1_0 / quarter < _float_1_0)
70#             {
71#                 return;
72#             }
73#         }
74#     }
75#
76#     // The execution always reaches this point.
77#     _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
78# }
79SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
80; SPIR-V
81; Version: 1.0
82; Generator: Khronos Glslang Reference Front End; 10
83; Bound: 88
84; Schema: 0
85               OpCapability Shader
86          %1 = OpExtInstImport "GLSL.std.450"
87               OpMemoryModel Logical GLSL450
88               OpEntryPoint Fragment %4 "main" %9
89               OpExecutionMode %4 OriginUpperLeft
90               OpSource ESSL 320
91               OpName %4 "main"
92               OpName %9 "_GLF_color"
93               OpName %14 "buf1"
94               OpMemberName %14 0 "_GLF_uniform_int_values"
95               OpName %16 ""
96               OpName %24 "i"
97               OpName %35 "j"
98               OpName %53 "buf0"
99               OpMemberName %53 0 "_GLF_uniform_float_values"
100               OpName %55 ""
101               OpName %59 "buf2"
102               OpMemberName %59 0 "quarter"
103               OpName %61 ""
104               OpDecorate %9 Location 0
105               OpDecorate %13 ArrayStride 16
106               OpMemberDecorate %14 0 Offset 0
107               OpDecorate %14 Block
108               OpDecorate %16 DescriptorSet 0
109               OpDecorate %16 Binding 1
110               OpDecorate %52 ArrayStride 16
111               OpMemberDecorate %53 0 Offset 0
112               OpDecorate %53 Block
113               OpDecorate %55 DescriptorSet 0
114               OpDecorate %55 Binding 0
115               OpMemberDecorate %59 0 Offset 0
116               OpDecorate %59 Block
117               OpDecorate %61 DescriptorSet 0
118               OpDecorate %61 Binding 2
119          %2 = OpTypeVoid
120          %3 = OpTypeFunction %2
121          %6 = OpTypeFloat 32
122          %7 = OpTypeVector %6 4
123          %8 = OpTypePointer Output %7
124          %9 = OpVariable %8 Output
125         %10 = OpTypeInt 32 1
126         %11 = OpTypeInt 32 0
127         %12 = OpConstant %11 2
128         %13 = OpTypeArray %10 %12
129         %14 = OpTypeStruct %13
130         %15 = OpTypePointer Uniform %14
131         %16 = OpVariable %15 Uniform
132         %17 = OpConstant %10 0
133         %18 = OpTypePointer Uniform %10
134         %23 = OpTypePointer Function %10
135         %25 = OpConstant %10 1
136         %32 = OpConstant %10 9
137         %33 = OpTypeBool
138         %42 = OpConstant %10 10
139         %51 = OpConstant %11 1
140         %52 = OpTypeArray %6 %51
141         %53 = OpTypeStruct %52
142         %54 = OpTypePointer Uniform %53
143         %55 = OpVariable %54 Uniform
144         %56 = OpTypePointer Uniform %6
145         %59 = OpTypeStruct %6
146         %60 = OpTypePointer Uniform %59
147         %61 = OpVariable %60 Uniform
148          %4 = OpFunction %2 None %3
149          %5 = OpLabel
150         %24 = OpVariable %23 Function
151         %35 = OpVariable %23 Function
152         %19 = OpAccessChain %18 %16 %17 %17
153         %20 = OpLoad %10 %19
154         %21 = OpConvertSToF %6 %20
155         %22 = OpCompositeConstruct %7 %21 %21 %21 %21
156               OpStore %9 %22
157               OpStore %24 %25
158               OpBranch %26
159         %26 = OpLabel
160               OpLoopMerge %28 %29 None
161               OpBranch %30
162         %30 = OpLabel
163         %31 = OpLoad %10 %24
164         %34 = OpSLessThan %33 %31 %32
165               OpBranchConditional %34 %27 %28
166         %27 = OpLabel
167               OpStore %35 %25
168               OpBranch %36
169         %36 = OpLabel
170               OpLoopMerge %38 %39 None
171               OpBranch %40
172         %40 = OpLabel
173         %41 = OpLoad %10 %35
174         %43 = OpSLessThan %33 %41 %42
175               OpBranchConditional %43 %37 %38
176         %37 = OpLabel
177         %44 = OpLoad %10 %24
178         %45 = OpAccessChain %18 %16 %17 %25
179         %46 = OpLoad %10 %45
180         %47 = OpSGreaterThan %33 %44 %46
181               OpSelectionMerge %49 None
182               OpBranchConditional %47 %48 %49
183         %48 = OpLabel
184               OpBranch %39
185         %49 = OpLabel
186         %57 = OpAccessChain %56 %55 %17 %17
187         %58 = OpLoad %6 %57
188         %62 = OpAccessChain %56 %61 %17
189         %63 = OpLoad %6 %62
190         %64 = OpFDiv %6 %58 %63
191         %65 = OpAccessChain %56 %55 %17 %17
192         %66 = OpLoad %6 %65
193         %67 = OpFOrdLessThan %33 %64 %66
194               OpSelectionMerge %69 None
195               OpBranchConditional %67 %68 %69
196         %68 = OpLabel
197               OpReturn
198         %69 = OpLabel
199               OpBranch %39
200         %39 = OpLabel
201         %71 = OpLoad %10 %35
202         %72 = OpIAdd %10 %71 %25
203               OpStore %35 %72
204               OpBranch %36
205         %38 = OpLabel
206               OpBranch %29
207         %29 = OpLabel
208         %73 = OpLoad %10 %24
209         %74 = OpIAdd %10 %73 %25
210               OpStore %24 %74
211               OpBranch %26
212         %28 = OpLabel
213         %75 = OpAccessChain %18 %16 %17 %25
214         %76 = OpLoad %10 %75
215         %77 = OpConvertSToF %6 %76
216         %78 = OpAccessChain %18 %16 %17 %17
217         %79 = OpLoad %10 %78
218         %80 = OpConvertSToF %6 %79
219         %81 = OpAccessChain %18 %16 %17 %17
220         %82 = OpLoad %10 %81
221         %83 = OpConvertSToF %6 %82
222         %84 = OpAccessChain %18 %16 %17 %25
223         %85 = OpLoad %10 %84
224         %86 = OpConvertSToF %6 %85
225         %87 = OpCompositeConstruct %7 %77 %80 %83 %86
226               OpStore %9 %87
227               OpReturn
228               OpFunctionEnd
229END
230
231# uniforms for variant
232
233# quarter
234BUFFER variant_quarter DATA_TYPE float STD140 DATA
235 0.25
236END
237# _GLF_uniform_int_values
238BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
239 0 1
240END
241# _GLF_uniform_float_values
242BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
243 1.0
244END
245
246BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
247
248PIPELINE graphics variant_pipeline
249  ATTACH variant_vertex_shader
250  ATTACH variant_fragment_shader
251  FRAMEBUFFER_SIZE 16 16
252  BIND BUFFER variant_framebuffer AS color LOCATION 0
253  BIND BUFFER variant_quarter AS uniform DESCRIPTOR_SET 0 BINDING 2
254  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
255  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
256END
257CLEAR_COLOR variant_pipeline 0 0 0 255
258
259CLEAR variant_pipeline
260RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 16 16
261
262EXPECT variant_framebuffer IDX 0 0 SIZE 16 16 EQ_RGBA 255 0 0 255
263