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
24# Optimized using spirv-opt with the following arguments:
25# '--reduce-load-size'
26# '--if-conversion'
27# '--if-conversion'
28# '--combine-access-chains'
29# '--eliminate-dead-branches'
30# '--merge-return'
31# '--eliminate-dead-branches'
32# '--merge-blocks'
33# '--if-conversion'
34# '--eliminate-local-single-store'
35# '--redundancy-elimination'
36# '--private-to-local'
37# '--combine-access-chains'
38# '--ccp'
39# '--eliminate-local-multi-store'
40# '--if-conversion'
41# '--convert-local-access-chains'
42# '--combine-access-chains'
43# '--reduce-load-size'
44# '--ccp'
45# '--eliminate-dead-inserts'
46# '--simplify-instructions'
47# '--eliminate-dead-code-aggressive'
48# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af
49
50
51
52SHADER vertex variant_vertex_shader PASSTHROUGH
53
54# variant_fragment_shader is derived from the following GLSL:
55# #version 320 es
56# #define _int_0 _GLF_uniform_int_values[0]
57# #define _int_1 _GLF_uniform_int_values[1]
58# #define _int_2 _GLF_uniform_int_values[2]
59# #define _float_1_0 _GLF_uniform_float_values[0]
60# #define _float_0_0 _GLF_uniform_float_values[1]
61#
62# precision highp int;
63# precision highp float;
64#
65# // Contents of _GLF_uniform_int_values: [0, 1, 2]
66# layout(set = 0, binding = 0) uniform buf0
67# {
68#     int _GLF_uniform_int_values[3];
69# };
70# // Contents of _GLF_uniform_float_values: [1.0, 0.0]
71# layout(set = 0, binding = 1) uniform buf1
72# {
73#     float _GLF_uniform_float_values[2];
74# };
75#
76# layout(location = 0) out vec4 _GLF_color;
77#
78# void main()
79# {
80#     mat3x2 m32 = mat3x2(_float_1_0);
81#     int a = 3;
82#
83#     // Always false.
84#     if (_int_0 == 1)
85#     {
86#         // Indexing past the matrix elements, but this
87#         // code is never executed and the values are not
88#         // used for the final results.
89#         m32[a][_int_0] = _float_1_0;
90#     }
91#
92#     float sums[3] = float[3](_float_1_0, _float_1_0, _float_1_0);
93#
94#     for(int c = _int_0; c < _int_2; c ++)
95#     {
96#         // This value is still unused later.
97#         sums[_int_2] += m32[c][_int_0];
98#     }
99#
100#     // This only depends on the initialized constant values.
101#     _GLF_color = vec4(sums[_int_0], _float_0_0, _float_0_0, sums[_int_1]);
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: 105
108; Schema: 0
109               OpCapability Shader
110          %1 = OpExtInstImport "GLSL.std.450"
111               OpMemoryModel Logical GLSL450
112               OpEntryPoint Fragment %4 "main" %89
113               OpExecutionMode %4 OriginUpperLeft
114               OpSource ESSL 320
115               OpName %4 "main"
116               OpName %10 "m32"
117               OpName %14 "buf1"
118               OpMemberName %14 0 "_GLF_uniform_float_values"
119               OpName %16 ""
120               OpName %33 "buf0"
121               OpMemberName %33 0 "_GLF_uniform_int_values"
122               OpName %35 ""
123               OpName %53 "sums"
124               OpName %89 "_GLF_color"
125               OpDecorate %13 ArrayStride 16
126               OpMemberDecorate %14 0 Offset 0
127               OpDecorate %14 Block
128               OpDecorate %16 DescriptorSet 0
129               OpDecorate %16 Binding 1
130               OpDecorate %32 ArrayStride 16
131               OpMemberDecorate %33 0 Offset 0
132               OpDecorate %33 Block
133               OpDecorate %35 DescriptorSet 0
134               OpDecorate %35 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 = OpTypeMatrix %7 3
141          %9 = OpTypePointer Function %8
142         %11 = OpTypeInt 32 0
143         %12 = OpConstant %11 2
144         %13 = OpTypeArray %6 %12
145         %14 = OpTypeStruct %13
146         %15 = OpTypePointer Uniform %14
147         %16 = OpVariable %15 Uniform
148         %17 = OpTypeInt 32 1
149         %18 = OpConstant %17 0
150         %19 = OpTypePointer Uniform %6
151         %23 = OpConstant %6 0
152         %30 = OpConstant %17 3
153         %31 = OpConstant %11 3
154         %32 = OpTypeArray %17 %31
155         %33 = OpTypeStruct %32
156         %34 = OpTypePointer Uniform %33
157         %35 = OpVariable %34 Uniform
158         %36 = OpTypePointer Uniform %17
159         %39 = OpConstant %17 1
160         %40 = OpTypeBool
161         %49 = OpTypePointer Function %6
162         %51 = OpTypeArray %6 %31
163         %52 = OpTypePointer Function %51
164         %70 = OpConstant %17 2
165         %87 = OpTypeVector %6 4
166         %88 = OpTypePointer Output %87
167         %89 = OpVariable %88 Output
168        %103 = OpConstantComposite %7 %23 %23
169          %4 = OpFunction %2 None %3
170          %5 = OpLabel
171         %10 = OpVariable %9 Function
172         %53 = OpVariable %52 Function
173         %20 = OpAccessChain %19 %16 %18 %18
174         %21 = OpLoad %6 %20
175         %24 = OpCompositeConstruct %7 %21 %23
176         %25 = OpCompositeConstruct %7 %23 %21
177         %27 = OpCompositeConstruct %8 %24 %25 %103
178               OpStore %10 %27
179         %37 = OpAccessChain %36 %35 %18 %18
180         %38 = OpLoad %17 %37
181         %41 = OpIEqual %40 %38 %39
182               OpSelectionMerge %43 None
183               OpBranchConditional %41 %42 %43
184         %42 = OpLabel
185         %50 = OpAccessChain %49 %10 %30 %38
186               OpStore %50 %21
187               OpBranch %43
188         %43 = OpLabel
189         %60 = OpCompositeConstruct %51 %21 %21 %21
190               OpStore %53 %60
191               OpBranch %64
192         %64 = OpLabel
193        %104 = OpPhi %17 %38 %43 %86 %65
194         %71 = OpAccessChain %36 %35 %18 %70
195         %72 = OpLoad %17 %71
196         %73 = OpSLessThan %40 %104 %72
197               OpLoopMerge %66 %65 None
198               OpBranchConditional %73 %65 %66
199         %65 = OpLabel
200         %79 = OpAccessChain %49 %10 %104 %38
201         %80 = OpLoad %6 %79
202         %81 = OpAccessChain %49 %53 %72
203         %82 = OpLoad %6 %81
204         %83 = OpFAdd %6 %82 %80
205               OpStore %81 %83
206         %86 = OpIAdd %17 %104 %39
207               OpBranch %64
208         %66 = OpLabel
209         %92 = OpAccessChain %49 %53 %38
210         %93 = OpLoad %6 %92
211         %94 = OpAccessChain %19 %16 %18 %39
212         %95 = OpLoad %6 %94
213         %98 = OpAccessChain %36 %35 %18 %39
214         %99 = OpLoad %17 %98
215        %100 = OpAccessChain %49 %53 %99
216        %101 = OpLoad %6 %100
217        %102 = OpCompositeConstruct %87 %93 %95 %95 %101
218               OpStore %89 %102
219               OpReturn
220               OpFunctionEnd
221END
222
223# uniforms for variant
224
225# _GLF_uniform_float_values
226BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
227 1.0 0.0
228END
229# _GLF_uniform_int_values
230BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
231 0 1 2
232END
233
234BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
235
236PIPELINE graphics variant_pipeline
237  ATTACH variant_vertex_shader
238  ATTACH variant_fragment_shader
239  FRAMEBUFFER_SIZE 256 256
240  BIND BUFFER variant_framebuffer AS color LOCATION 0
241  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 1
242  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
243END
244CLEAR_COLOR variant_pipeline 0 0 0 255
245
246CLEAR variant_pipeline
247RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
248
249EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
250