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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 NIR 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# const int _GLF_global_loop_bound = 100;
42# int _GLF_global_loop_count = 0;
43#
44# layout(location = 0) out vec4 _GLF_color;
45#
46# int func()
47# {
48#     // Never iterated as the loop count has already been exhausted
49#     // before calling this function.
50#     while (_GLF_global_loop_count < _GLF_global_loop_bound)
51#     {
52#         _GLF_global_loop_count++;
53#         return _int_1;
54#     }
55#
56#     return _int_2;
57# }
58#
59# void main()
60# {
61#     do
62#     {
63#         _GLF_global_loop_count++;
64#
65#         if (false)
66#         {
67#             return;
68#         }
69#     }
70#     while (true && (_GLF_global_loop_count < _GLF_global_loop_bound));
71#
72#     int a = func();
73#
74#     // Always true.
75#     if (a == _int_2)
76#     {
77#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
78#     }
79#     else
80#     {
81#         _GLF_color = vec4(_int_0);
82#     }
83# }
84SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
85; SPIR-V
86; Version: 1.0
87; Generator: Khronos Glslang Reference Front End; 10
88; Bound: 85
89; Schema: 0
90               OpCapability Shader
91          %1 = OpExtInstImport "GLSL.std.450"
92               OpMemoryModel Logical GLSL450
93               OpEntryPoint Fragment %4 "main" %66
94               OpExecutionMode %4 OriginUpperLeft
95               OpSource ESSL 320
96               OpName %4 "main"
97               OpName %8 "func("
98               OpName %11 "_GLF_global_loop_count"
99               OpName %28 "buf0"
100               OpMemberName %28 0 "_GLF_uniform_int_values"
101               OpName %30 ""
102               OpName %55 "a"
103               OpName %66 "_GLF_color"
104               OpDecorate %27 ArrayStride 16
105               OpMemberDecorate %28 0 Offset 0
106               OpDecorate %28 Block
107               OpDecorate %30 DescriptorSet 0
108               OpDecorate %30 Binding 0
109               OpDecorate %66 Location 0
110          %2 = OpTypeVoid
111          %3 = OpTypeFunction %2
112          %6 = OpTypeInt 32 1
113          %7 = OpTypeFunction %6
114         %10 = OpTypePointer Private %6
115         %11 = OpVariable %10 Private
116         %12 = OpConstant %6 0
117         %19 = OpConstant %6 100
118         %20 = OpTypeBool
119         %23 = OpConstant %6 1
120         %25 = OpTypeInt 32 0
121         %26 = OpConstant %25 3
122         %27 = OpTypeArray %6 %26
123         %28 = OpTypeStruct %27
124         %29 = OpTypePointer Uniform %28
125         %30 = OpVariable %29 Uniform
126         %31 = OpTypePointer Uniform %6
127         %35 = OpConstant %6 2
128         %46 = OpConstantFalse %20
129         %50 = OpConstantTrue %20
130         %54 = OpTypePointer Function %6
131         %63 = OpTypeFloat 32
132         %64 = OpTypeVector %63 4
133         %65 = OpTypePointer Output %64
134         %66 = OpVariable %65 Output
135          %4 = OpFunction %2 None %3
136          %5 = OpLabel
137         %55 = OpVariable %54 Function
138               OpStore %11 %12
139               OpBranch %40
140         %40 = OpLabel
141               OpLoopMerge %42 %43 None
142               OpBranch %41
143         %41 = OpLabel
144         %44 = OpLoad %6 %11
145         %45 = OpIAdd %6 %44 %23
146               OpStore %11 %45
147               OpSelectionMerge %48 None
148               OpBranchConditional %46 %47 %48
149         %47 = OpLabel
150               OpReturn
151         %48 = OpLabel
152               OpBranch %43
153         %43 = OpLabel
154         %51 = OpLoad %6 %11
155         %52 = OpSLessThan %20 %51 %19
156         %53 = OpLogicalAnd %20 %50 %52
157               OpBranchConditional %53 %40 %42
158         %42 = OpLabel
159         %56 = OpFunctionCall %6 %8
160               OpStore %55 %56
161         %57 = OpLoad %6 %55
162         %58 = OpAccessChain %31 %30 %12 %35
163         %59 = OpLoad %6 %58
164         %60 = OpIEqual %20 %57 %59
165               OpSelectionMerge %62 None
166               OpBranchConditional %60 %61 %80
167         %61 = OpLabel
168         %67 = OpAccessChain %31 %30 %12 %12
169         %68 = OpLoad %6 %67
170         %69 = OpConvertSToF %63 %68
171         %70 = OpAccessChain %31 %30 %12 %23
172         %71 = OpLoad %6 %70
173         %72 = OpConvertSToF %63 %71
174         %73 = OpAccessChain %31 %30 %12 %23
175         %74 = OpLoad %6 %73
176         %75 = OpConvertSToF %63 %74
177         %76 = OpAccessChain %31 %30 %12 %12
178         %77 = OpLoad %6 %76
179         %78 = OpConvertSToF %63 %77
180         %79 = OpCompositeConstruct %64 %69 %72 %75 %78
181               OpStore %66 %79
182               OpBranch %62
183         %80 = OpLabel
184         %81 = OpAccessChain %31 %30 %12 %23
185         %82 = OpLoad %6 %81
186         %83 = OpConvertSToF %63 %82
187         %84 = OpCompositeConstruct %64 %83 %83 %83 %83
188               OpStore %66 %84
189               OpBranch %62
190         %62 = OpLabel
191               OpReturn
192               OpFunctionEnd
193          %8 = OpFunction %6 None %7
194          %9 = OpLabel
195               OpBranch %13
196         %13 = OpLabel
197               OpLoopMerge %15 %16 None
198               OpBranch %17
199         %17 = OpLabel
200         %18 = OpLoad %6 %11
201         %21 = OpSLessThan %20 %18 %19
202               OpBranchConditional %21 %14 %15
203         %14 = OpLabel
204         %22 = OpLoad %6 %11
205         %24 = OpIAdd %6 %22 %23
206               OpStore %11 %24
207         %32 = OpAccessChain %31 %30 %12 %12
208         %33 = OpLoad %6 %32
209               OpReturnValue %33
210         %16 = OpLabel
211               OpBranch %13
212         %15 = OpLabel
213         %36 = OpAccessChain %31 %30 %12 %35
214         %37 = OpLoad %6 %36
215               OpReturnValue %37
216               OpFunctionEnd
217END
218
219# uniforms for variant
220
221# _GLF_uniform_int_values
222BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
223 1 0 2
224END
225
226BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
227
228PIPELINE graphics variant_pipeline
229  ATTACH variant_vertex_shader
230  ATTACH variant_fragment_shader
231  FRAMEBUFFER_SIZE 256 256
232  BIND BUFFER variant_framebuffer AS color LOCATION 0
233  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
234END
235CLEAR_COLOR variant_pipeline 0 0 0 255
236
237CLEAR variant_pipeline
238RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
239
240EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
241