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# '--copy-propagate-arrays'
26# '--eliminate-local-multi-store'
27# '--if-conversion'
28# '--if-conversion'
29# '--combine-access-chains'
30# '--redundancy-elimination'
31# '--eliminate-dead-branches'
32# '--eliminate-dead-branches'
33# '--merge-blocks'
34# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af
35
36
37
38SHADER vertex variant_vertex_shader PASSTHROUGH
39
40# variant_fragment_shader is derived from the following GLSL:
41# #version 320 es
42# #define _int_1 _GLF_uniform_int_values[0]
43# #define _int_0 _GLF_uniform_int_values[1]
44#
45# precision highp float;
46# precision highp int;
47#
48# // Contents of _GLF_uniform_int_values: [1, 0]
49# layout(set = 0, binding = 0) uniform buf0
50# {
51#     int _GLF_uniform_int_values[2];
52# };
53#
54# const int _GLF_global_loop_bound = 10;
55# int _GLF_global_loop_count = 0;
56#
57# layout(location = 0) out vec4 _GLF_color;
58#
59# int func()
60# {
61#     int a = 1;
62#     int i = 1;
63#
64#     // Iterated once.
65#     while(_GLF_global_loop_count < _GLF_global_loop_bound)
66#     {
67#         _GLF_global_loop_count++;
68#
69#         // Iterated nine times. 2 * a has no effect.
70#         for( i = _int_1; _GLF_global_loop_count < _GLF_global_loop_bound; 2 * a)
71#         {
72#             _GLF_global_loop_count++;
73#             i++;
74#         }
75#     }
76#
77#     // Returns 10.
78#     return i;
79# }
80#
81# void main()
82# {
83#     // Always true.
84#     if(func() == 10)
85#     {
86#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
87#     }
88#     else
89#     {
90#         _GLF_color = vec4(_int_0);
91#     }
92# }
93SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
94; SPIR-V
95; Version: 1.0
96; Generator: Khronos Glslang Reference Front End; 10
97; Bound: 84
98; Schema: 0
99               OpCapability Shader
100          %1 = OpExtInstImport "GLSL.std.450"
101               OpMemoryModel Logical GLSL450
102               OpEntryPoint Fragment %4 "main" %61
103               OpExecutionMode %4 OriginUpperLeft
104               OpSource ESSL 320
105               OpName %4 "main"
106               OpName %8 "func("
107               OpName %11 "_GLF_global_loop_count"
108               OpName %14 "a"
109               OpName %16 "i"
110               OpName %31 "buf0"
111               OpMemberName %31 0 "_GLF_uniform_int_values"
112               OpName %33 ""
113               OpName %61 "_GLF_color"
114               OpDecorate %30 ArrayStride 16
115               OpMemberDecorate %31 0 Offset 0
116               OpDecorate %31 Block
117               OpDecorate %33 DescriptorSet 0
118               OpDecorate %33 Binding 0
119               OpDecorate %61 Location 0
120          %2 = OpTypeVoid
121          %3 = OpTypeFunction %2
122          %6 = OpTypeInt 32 1
123          %7 = OpTypeFunction %6
124         %10 = OpTypePointer Private %6
125         %11 = OpVariable %10 Private
126         %12 = OpConstant %6 0
127         %13 = OpTypePointer Function %6
128         %15 = OpConstant %6 1
129         %23 = OpConstant %6 10
130         %24 = OpTypeBool
131         %28 = OpTypeInt 32 0
132         %29 = OpConstant %28 2
133         %30 = OpTypeArray %6 %29
134         %31 = OpTypeStruct %30
135         %32 = OpTypePointer Uniform %31
136         %33 = OpVariable %32 Uniform
137         %34 = OpTypePointer Uniform %6
138         %48 = OpConstant %6 2
139         %58 = OpTypeFloat 32
140         %59 = OpTypeVector %58 4
141         %60 = OpTypePointer Output %59
142         %61 = OpVariable %60 Output
143          %4 = OpFunction %2 None %3
144          %5 = OpLabel
145               OpStore %11 %12
146         %54 = OpFunctionCall %6 %8
147         %55 = OpIEqual %24 %54 %23
148               OpSelectionMerge %57 None
149               OpBranchConditional %55 %56 %75
150         %56 = OpLabel
151         %62 = OpAccessChain %34 %33 %12 %12
152         %63 = OpLoad %6 %62
153         %64 = OpConvertSToF %58 %63
154         %65 = OpAccessChain %34 %33 %12 %15
155         %66 = OpLoad %6 %65
156         %67 = OpConvertSToF %58 %66
157         %74 = OpCompositeConstruct %59 %64 %67 %67 %64
158               OpStore %61 %74
159               OpBranch %57
160         %75 = OpLabel
161         %76 = OpAccessChain %34 %33 %12 %15
162         %77 = OpLoad %6 %76
163         %78 = OpConvertSToF %58 %77
164         %79 = OpCompositeConstruct %59 %78 %78 %78 %78
165               OpStore %61 %79
166               OpBranch %57
167         %57 = OpLabel
168               OpReturn
169               OpFunctionEnd
170          %8 = OpFunction %6 None %7
171          %9 = OpLabel
172         %14 = OpVariable %13 Function
173         %16 = OpVariable %13 Function
174               OpStore %14 %15
175               OpStore %16 %15
176               OpBranch %17
177         %17 = OpLabel
178         %80 = OpPhi %6 %15 %9 %81 %20
179         %83 = OpPhi %6 %15 %9 %83 %20
180         %22 = OpLoad %6 %11
181         %25 = OpSLessThan %24 %22 %23
182               OpLoopMerge %19 %20 None
183               OpBranchConditional %25 %18 %19
184         %18 = OpLabel
185         %26 = OpLoad %6 %11
186         %27 = OpIAdd %6 %26 %15
187               OpStore %11 %27
188         %35 = OpAccessChain %34 %33 %12 %12
189         %36 = OpLoad %6 %35
190               OpStore %16 %36
191               OpBranch %37
192         %37 = OpLabel
193         %81 = OpPhi %6 %36 %18 %47 %38
194         %42 = OpLoad %6 %11
195         %43 = OpSLessThan %24 %42 %23
196               OpLoopMerge %39 %38 None
197               OpBranchConditional %43 %38 %39
198         %38 = OpLabel
199         %44 = OpLoad %6 %11
200         %45 = OpIAdd %6 %44 %15
201               OpStore %11 %45
202         %47 = OpIAdd %6 %81 %15
203               OpStore %16 %47
204         %50 = OpIMul %6 %48 %83
205               OpBranch %37
206         %39 = OpLabel
207               OpBranch %20
208         %20 = OpLabel
209               OpBranch %17
210         %19 = OpLabel
211               OpReturnValue %80
212               OpFunctionEnd
213END
214
215# uniforms for variant
216
217# _GLF_uniform_int_values
218BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
219 1 0
220END
221
222BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
223
224PIPELINE graphics variant_pipeline
225  ATTACH variant_vertex_shader
226  ATTACH variant_fragment_shader
227  FRAMEBUFFER_SIZE 32 32
228  BIND BUFFER variant_framebuffer AS color LOCATION 0
229  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
230END
231CLEAR_COLOR variant_pipeline 0 0 0 255
232
233CLEAR variant_pipeline
234RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
235
236EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
237