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# '--scalar-replacement=100'
26# '--eliminate-dead-inserts'
27# '--eliminate-local-multi-store'
28# '--convert-local-access-chains'
29# '--eliminate-dead-branches'
30# '--merge-blocks'
31# '--eliminate-dead-branches'
32# '--eliminate-dead-branches'
33# '--merge-blocks'
34# '--scalar-replacement=100'
35# '--eliminate-dead-branches'
36# '--merge-blocks'
37# '--ccp'
38# '--eliminate-local-single-store'
39# '--scalar-replacement=100'
40# '--convert-local-access-chains'
41# '--ccp'
42# '--reduce-load-size'
43# '--eliminate-dead-branches'
44# '--eliminate-local-single-block'
45# '--redundancy-elimination'
46# '--combine-access-chains'
47# '--ccp'
48# '--inline-entry-points-exhaustive'
49# '--scalar-replacement=100'
50# '--ccp'
51# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af
52
53
54
55SHADER vertex variant_vertex_shader PASSTHROUGH
56
57# variant_fragment_shader is derived from the following GLSL:
58# #version 320 es
59# #define _int_1 _GLF_uniform_int_values[0]
60# #define _int_0 _GLF_uniform_int_values[1]
61# #define _float_1_0 _GLF_uniform_float_values[0]
62# #define _float_0_5 _GLF_uniform_float_values[1]
63#
64# precision highp float;
65# precision highp int;
66#
67# // Contents of _GLF_uniform_int_values: [1, 0]
68# layout(set = 0, binding = 0) uniform buf0
69# {
70#     int _GLF_uniform_int_values[2];
71# };
72#
73# // Contents of _GLF_uniform_float_values: [1.0, 0.5]
74# layout(set = 0, binding = 1) uniform buf1
75# {
76#     float _GLF_uniform_float_values[2];
77# };
78#
79# // Contents of one: [1.0, 1.0]
80# layout(set = 0, binding = 2) uniform buf2
81# {
82#     vec2 one;
83# };
84#
85# layout(location = 0) out vec4 _GLF_color;
86#
87# void main()
88# {
89#     float f = _float_1_0;
90#
91#     // Iterated once.
92#     do
93#     {
94#         // Iterated once.
95#         for (int i = 0; i != clamp(_int_0, int(one.x), 2); i++)
96#         {
97#             // Always chooses 2.0, thus f becomes 0.5.
98#             f /= one.y > _float_1_0 ? 256.0 : 2.0;
99#         }
100#     }
101#     while(_float_1_0 > one.y);
102#
103#     // Always true.
104#     if (f > _float_0_5 - 0.01 && f < _float_0_5 + 0.01)
105#     {
106#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
107#     }
108#     else
109#     {
110#         _GLF_color = vec4(_int_0);
111#     }
112# }
113SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
114; SPIR-V
115; Version: 1.0
116; Generator: Khronos Glslang Reference Front End; 10
117; Bound: 110
118; Schema: 0
119               OpCapability Shader
120          %1 = OpExtInstImport "GLSL.std.450"
121               OpMemoryModel Logical GLSL450
122               OpEntryPoint Fragment %4 "main" %88
123               OpExecutionMode %4 OriginUpperLeft
124               OpSource ESSL 320
125               OpName %4 "main"
126               OpName %8 "f"
127               OpName %12 "buf1"
128               OpMemberName %12 0 "_GLF_uniform_float_values"
129               OpName %14 ""
130               OpName %25 "i"
131               OpName %33 "buf0"
132               OpMemberName %33 0 "_GLF_uniform_int_values"
133               OpName %35 ""
134               OpName %41 "buf2"
135               OpMemberName %41 0 "one"
136               OpName %43 ""
137               OpName %88 "_GLF_color"
138               OpDecorate %11 ArrayStride 16
139               OpMemberDecorate %12 0 Offset 0
140               OpDecorate %12 Block
141               OpDecorate %14 DescriptorSet 0
142               OpDecorate %14 Binding 1
143               OpDecorate %32 ArrayStride 16
144               OpMemberDecorate %33 0 Offset 0
145               OpDecorate %33 Block
146               OpDecorate %35 DescriptorSet 0
147               OpDecorate %35 Binding 0
148               OpMemberDecorate %41 0 Offset 0
149               OpDecorate %41 Block
150               OpDecorate %43 DescriptorSet 0
151               OpDecorate %43 Binding 2
152               OpDecorate %88 Location 0
153          %2 = OpTypeVoid
154          %3 = OpTypeFunction %2
155          %6 = OpTypeFloat 32
156          %7 = OpTypePointer Function %6
157          %9 = OpTypeInt 32 0
158         %10 = OpConstant %9 2
159         %11 = OpTypeArray %6 %10
160         %12 = OpTypeStruct %11
161         %13 = OpTypePointer Uniform %12
162         %14 = OpVariable %13 Uniform
163         %15 = OpTypeInt 32 1
164         %16 = OpConstant %15 0
165         %17 = OpTypePointer Uniform %6
166         %24 = OpTypePointer Function %15
167         %32 = OpTypeArray %15 %10
168         %33 = OpTypeStruct %32
169         %34 = OpTypePointer Uniform %33
170         %35 = OpVariable %34 Uniform
171         %36 = OpConstant %15 1
172         %37 = OpTypePointer Uniform %15
173         %40 = OpTypeVector %6 2
174         %41 = OpTypeStruct %40
175         %42 = OpTypePointer Uniform %41
176         %43 = OpVariable %42 Uniform
177         %44 = OpConstant %9 0
178         %48 = OpConstant %15 2
179         %50 = OpTypeBool
180         %52 = OpConstant %9 1
181         %58 = OpConstant %6 256
182         %59 = OpConstant %6 2
183         %73 = OpConstant %6 0.00999999978
184         %86 = OpTypeVector %6 4
185         %87 = OpTypePointer Output %86
186         %88 = OpVariable %87 Output
187          %4 = OpFunction %2 None %3
188          %5 = OpLabel
189          %8 = OpVariable %7 Function
190         %25 = OpVariable %24 Function
191         %18 = OpAccessChain %17 %14 %16 %16
192         %19 = OpLoad %6 %18
193               OpStore %8 %19
194               OpBranch %20
195         %20 = OpLabel
196        %109 = OpPhi %6 %19 %5 %108 %23
197               OpStore %25 %16
198               OpLoopMerge %22 %23 None
199               OpBranch %26
200         %26 = OpLabel
201        %108 = OpPhi %6 %109 %20 %62 %27
202        %107 = OpPhi %15 %16 %20 %64 %27
203         %38 = OpAccessChain %37 %35 %16 %36
204         %39 = OpLoad %15 %38
205         %45 = OpAccessChain %17 %43 %16 %44
206         %46 = OpLoad %6 %45
207         %47 = OpConvertFToS %15 %46
208         %49 = OpExtInst %15 %1 SClamp %39 %47 %48
209         %51 = OpINotEqual %50 %107 %49
210               OpLoopMerge %28 %27 None
211               OpBranchConditional %51 %27 %28
212         %27 = OpLabel
213         %53 = OpAccessChain %17 %43 %16 %52
214         %54 = OpLoad %6 %53
215         %57 = OpFOrdGreaterThan %50 %54 %19
216         %60 = OpSelect %6 %57 %58 %59
217         %62 = OpFDiv %6 %108 %60
218               OpStore %8 %62
219         %64 = OpIAdd %15 %107 %36
220               OpStore %25 %64
221               OpBranch %26
222         %28 = OpLabel
223               OpBranch %23
224         %23 = OpLabel
225         %67 = OpAccessChain %17 %43 %16 %52
226         %68 = OpLoad %6 %67
227         %69 = OpFOrdGreaterThan %50 %19 %68
228               OpBranchConditional %69 %20 %22
229         %22 = OpLabel
230         %71 = OpAccessChain %17 %14 %16 %36
231         %72 = OpLoad %6 %71
232         %74 = OpFSub %6 %72 %73
233         %75 = OpFOrdGreaterThan %50 %108 %74
234               OpSelectionMerge %77 None
235               OpBranchConditional %75 %76 %77
236         %76 = OpLabel
237         %81 = OpFAdd %6 %72 %73
238         %82 = OpFOrdLessThan %50 %108 %81
239               OpBranch %77
240         %77 = OpLabel
241         %83 = OpPhi %50 %75 %22 %82 %76
242               OpSelectionMerge %85 None
243               OpBranchConditional %83 %84 %102
244         %84 = OpLabel
245         %89 = OpAccessChain %37 %35 %16 %16
246         %90 = OpLoad %15 %89
247         %91 = OpConvertSToF %6 %90
248         %94 = OpConvertSToF %6 %39
249        %101 = OpCompositeConstruct %86 %91 %94 %94 %91
250               OpStore %88 %101
251               OpBranch %85
252        %102 = OpLabel
253        %105 = OpConvertSToF %6 %39
254        %106 = OpCompositeConstruct %86 %105 %105 %105 %105
255               OpStore %88 %106
256               OpBranch %85
257         %85 = OpLabel
258               OpReturn
259               OpFunctionEnd
260END
261
262# uniforms for variant
263
264# one
265BUFFER variant_one DATA_TYPE vec2<float> STD140 DATA
266 1.0 1.0
267END
268# _GLF_uniform_float_values
269BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
270 1.0 0.5
271END
272# _GLF_uniform_int_values
273BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
274 1 0
275END
276
277BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
278
279PIPELINE graphics variant_pipeline
280  ATTACH variant_vertex_shader
281  ATTACH variant_fragment_shader
282  FRAMEBUFFER_SIZE 256 256
283  BIND BUFFER variant_framebuffer AS color LOCATION 0
284  BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 2
285  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 1
286  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
287END
288CLEAR_COLOR variant_pipeline 0 0 0 255
289
290CLEAR variant_pipeline
291RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
292
293EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
294