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
24# Optimized using spirv-opt with the following arguments:
25# '-O'
26# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af
27
28
29
30SHADER vertex variant_vertex_shader PASSTHROUGH
31
32# variant_fragment_shader is derived from the following GLSL:
33# #version 320 es
34# #define _int_0 _GLF_uniform_int_values[0]
35# #define _int_1 _GLF_uniform_int_values[1]
36# #define _int_64 _GLF_uniform_int_values[2]
37#
38# precision highp float;
39# precision highp int;
40#
41# // Contents of _GLF_uniform_int_values: [0, 1, 64]
42# layout(set = 0, binding = 0) uniform buf0
43# {
44#     int _GLF_uniform_int_values[3];
45# };
46#
47# // Contents of injectionSwitch: [0.0, 1.0]
48# layout(set = 0, binding = 1) uniform buf1
49# {
50#     vec2 injectionSwitch;
51# };
52#
53# layout(location = 0) out vec4 _GLF_color;
54#
55# void main()
56# {
57#     // Always false.
58#     if(injectionSwitch.x > injectionSwitch.y)
59#     {
60#         return;
61#     }
62#
63#     int a = 0;
64#
65#     do
66#     {
67#         // Iterates twice but has no effect.
68#         for(int i = 1; i < findLSB(8); i++)
69#         {
70#             if(i < a)
71#             {
72#                 continue;
73#             }
74#
75#             // Always false.
76#             if(injectionSwitch.x > injectionSwitch.y)
77#             {
78#             }
79#             else
80#             {
81#                 // Always false.
82#                 if(gl_FragCoord.y < 0.0)
83#                 {
84#                     discard;
85#                 }
86#             }
87#         }
88#
89#         a++;
90#     }
91#     while(a < 64);
92#
93#     // Always true.
94#     if(a == _int_64)
95#     {
96#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
97#     }
98#     else
99#     {
100#         _GLF_color = vec4(_int_0);
101#     }
102# }
103SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
104; SPIR-V
105; Version: 1.0
106; Generator: Khronos Glslang Reference Front End; 10
107; Bound: 117
108; Schema: 0
109               OpCapability Shader
110          %1 = OpExtInstImport "GLSL.std.450"
111               OpMemoryModel Logical GLSL450
112               OpEntryPoint Fragment %4 "main" %59 %89
113               OpExecutionMode %4 OriginUpperLeft
114               OpSource ESSL 320
115               OpName %4 "main"
116               OpName %8 "buf1"
117               OpMemberName %8 0 "injectionSwitch"
118               OpName %10 ""
119               OpName %59 "gl_FragCoord"
120               OpName %78 "buf0"
121               OpMemberName %78 0 "_GLF_uniform_int_values"
122               OpName %80 ""
123               OpName %89 "_GLF_color"
124               OpMemberDecorate %8 0 Offset 0
125               OpDecorate %8 Block
126               OpDecorate %10 DescriptorSet 0
127               OpDecorate %10 Binding 1
128               OpDecorate %41 RelaxedPrecision
129               OpDecorate %59 BuiltIn FragCoord
130               OpDecorate %77 ArrayStride 16
131               OpMemberDecorate %78 0 Offset 0
132               OpDecorate %78 Block
133               OpDecorate %80 DescriptorSet 0
134               OpDecorate %80 Binding 0
135               OpDecorate %89 Location 0
136          %2 = OpTypeVoid
137          %3 = OpTypeFunction %2
138          %6 = OpTypeFloat 32
139          %7 = OpTypeVector %6 2
140          %8 = OpTypeStruct %7
141          %9 = OpTypePointer Uniform %8
142         %10 = OpVariable %9 Uniform
143         %11 = OpTypeInt 32 1
144         %12 = OpConstant %11 0
145         %13 = OpTypeInt 32 0
146         %14 = OpConstant %13 0
147         %15 = OpTypePointer Uniform %6
148         %18 = OpConstant %13 1
149         %21 = OpTypeBool
150         %33 = OpConstant %11 1
151         %40 = OpConstant %11 8
152         %57 = OpTypeVector %6 4
153         %58 = OpTypePointer Input %57
154         %59 = OpVariable %58 Input
155         %60 = OpTypePointer Input %6
156         %63 = OpConstant %6 0
157         %73 = OpConstant %11 64
158         %76 = OpConstant %13 3
159         %77 = OpTypeArray %11 %76
160         %78 = OpTypeStruct %77
161         %79 = OpTypePointer Uniform %78
162         %80 = OpVariable %79 Uniform
163         %81 = OpConstant %11 2
164         %82 = OpTypePointer Uniform %11
165         %88 = OpTypePointer Output %57
166         %89 = OpVariable %88 Output
167          %4 = OpFunction %2 None %3
168          %5 = OpLabel
169               OpSelectionMerge %108 None
170               OpSwitch %14 %109
171        %109 = OpLabel
172         %16 = OpAccessChain %15 %10 %12 %14
173         %17 = OpLoad %6 %16
174         %19 = OpAccessChain %15 %10 %12 %18
175         %20 = OpLoad %6 %19
176         %22 = OpFOrdGreaterThan %21 %17 %20
177               OpSelectionMerge %24 None
178               OpBranchConditional %22 %23 %24
179         %23 = OpLabel
180               OpBranch %108
181         %24 = OpLabel
182               OpBranch %28
183         %28 = OpLabel
184        %116 = OpPhi %11 %12 %24 %71 %31
185               OpLoopMerge %30 %31 None
186               OpBranch %34
187         %34 = OpLabel
188        %114 = OpPhi %11 %33 %28 %69 %37
189         %41 = OpExtInst %11 %1 FindILsb %40
190         %42 = OpSLessThan %21 %114 %41
191               OpLoopMerge %36 %37 None
192               OpBranchConditional %42 %35 %36
193         %35 = OpLabel
194         %45 = OpSLessThan %21 %114 %116
195               OpSelectionMerge %47 None
196               OpBranchConditional %45 %46 %47
197         %46 = OpLabel
198               OpBranch %37
199         %47 = OpLabel
200               OpSelectionMerge %55 None
201               OpBranchConditional %22 %54 %56
202         %54 = OpLabel
203               OpBranch %55
204         %56 = OpLabel
205         %61 = OpAccessChain %60 %59 %18
206         %62 = OpLoad %6 %61
207         %64 = OpFOrdLessThan %21 %62 %63
208               OpSelectionMerge %66 None
209               OpBranchConditional %64 %65 %66
210         %65 = OpLabel
211               OpKill
212         %66 = OpLabel
213               OpBranch %55
214         %55 = OpLabel
215               OpBranch %37
216         %37 = OpLabel
217         %69 = OpIAdd %11 %114 %33
218               OpBranch %34
219         %36 = OpLabel
220         %71 = OpIAdd %11 %116 %33
221               OpBranch %31
222         %31 = OpLabel
223         %74 = OpSLessThan %21 %71 %73
224               OpBranchConditional %74 %28 %30
225         %30 = OpLabel
226         %83 = OpAccessChain %82 %80 %12 %81
227         %84 = OpLoad %11 %83
228         %85 = OpIEqual %21 %71 %84
229               OpSelectionMerge %87 None
230               OpBranchConditional %85 %86 %103
231         %86 = OpLabel
232         %90 = OpAccessChain %82 %80 %12 %33
233         %91 = OpLoad %11 %90
234         %92 = OpConvertSToF %6 %91
235         %93 = OpAccessChain %82 %80 %12 %12
236         %94 = OpLoad %11 %93
237         %95 = OpConvertSToF %6 %94
238        %102 = OpCompositeConstruct %57 %92 %95 %95 %92
239               OpStore %89 %102
240               OpBranch %87
241        %103 = OpLabel
242        %104 = OpAccessChain %82 %80 %12 %12
243        %105 = OpLoad %11 %104
244        %106 = OpConvertSToF %6 %105
245        %107 = OpCompositeConstruct %57 %106 %106 %106 %106
246               OpStore %89 %107
247               OpBranch %87
248         %87 = OpLabel
249               OpBranch %108
250        %108 = OpLabel
251               OpReturn
252               OpFunctionEnd
253END
254
255# uniforms for variant
256
257# injectionSwitch
258BUFFER variant_injectionSwitch DATA_TYPE vec2<float> STD140 DATA
259 0.0 1.0
260END
261# _GLF_uniform_int_values
262BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
263 0 1 64
264END
265
266BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
267
268PIPELINE graphics variant_pipeline
269  ATTACH variant_vertex_shader
270  ATTACH variant_fragment_shader
271  FRAMEBUFFER_SIZE 32 32
272  BIND BUFFER variant_framebuffer AS color LOCATION 0
273  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 1
274  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
275END
276CLEAR_COLOR variant_pipeline 0 0 0 255
277
278CLEAR variant_pipeline
279RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
280
281EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
282