1#!amber
2
3# Copyright 2020 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# '--eliminate-dead-branches'
26# '--eliminate-local-multi-store'
27# '--eliminate-local-single-store'
28# '--simplify-instructions'
29# '--eliminate-dead-branches'
30# '--copy-propagate-arrays'
31# '--copy-propagate-arrays'
32# '--eliminate-dead-inserts'
33# '--vector-dce'
34# '--vector-dce'
35# '--inline-entry-points-exhaustive'
36# '--eliminate-local-single-store'
37# '--eliminate-local-single-store'
38# '--simplify-instructions'
39# '--eliminate-local-single-block'
40# '--ccp'
41# '--private-to-local'
42# '--scalar-replacement=100'
43# '--eliminate-local-single-block'
44# '--private-to-local'
45# '--scalar-replacement=100'
46# '--simplify-instructions'
47# '--eliminate-dead-branches'
48# '--merge-blocks'
49# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af
50
51
52
53SHADER vertex variant_vertex_shader PASSTHROUGH
54
55# variant_fragment_shader is derived from the following GLSL:
56# #version 320 es
57# #define _float_1_0 _GLF_uniform_float_values[0]
58# #define _float_2_0 _GLF_uniform_float_values[1]
59#
60# precision highp float;
61# precision highp int;
62#
63# // Contents of _GLF_uniform_float_values: [1.0, 2.0]
64# layout(set = 0, binding = 0) uniform buf0
65# {
66#     float _GLF_uniform_float_values[2];
67# };
68#
69# layout(location = 0) out vec4 _GLF_color;
70#
71# // Contents of zero: 0.0
72# layout(set = 0, binding = 1) uniform buf1
73# {
74#     float zero;
75# };
76#
77# void main()
78# {
79#     vec2 v0 = vec2(_float_1_0);
80#     vec4 v1 = vec4(v0.x);
81#
82#     // Always true.
83#     if(zero != _float_1_0)
84#     {
85#         // Always false.
86#         if(zero == _float_2_0)
87#         {
88#             return;
89#         }
90#         v1.yz -= _float_1_0;
91#     }
92#     else
93#     {
94#         discard;
95#     }
96#
97#     _GLF_color = v1;
98# }
99SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
100; SPIR-V
101; Version: 1.0
102; Generator: Khronos Glslang Reference Front End; 10
103; Bound: 62
104; Schema: 0
105               OpCapability Shader
106          %1 = OpExtInstImport "GLSL.std.450"
107               OpMemoryModel Logical GLSL450
108               OpEntryPoint Fragment %4 "main" %61
109               OpExecutionMode %4 OriginUpperLeft
110               OpSource ESSL 320
111               OpName %4 "main"
112               OpName %9 "v0"
113               OpName %13 "buf0"
114               OpMemberName %13 0 "_GLF_uniform_float_values"
115               OpName %15 ""
116               OpName %24 "v1"
117               OpName %30 "buf1"
118               OpMemberName %30 0 "zero"
119               OpName %32 ""
120               OpName %61 "_GLF_color"
121               OpDecorate %12 ArrayStride 16
122               OpMemberDecorate %13 0 Offset 0
123               OpDecorate %13 Block
124               OpDecorate %15 DescriptorSet 0
125               OpDecorate %15 Binding 0
126               OpMemberDecorate %30 0 Offset 0
127               OpDecorate %30 Block
128               OpDecorate %32 DescriptorSet 0
129               OpDecorate %32 Binding 1
130               OpDecorate %61 Location 0
131          %2 = OpTypeVoid
132          %3 = OpTypeFunction %2
133          %6 = OpTypeFloat 32
134          %7 = OpTypeVector %6 2
135          %8 = OpTypePointer Function %7
136         %10 = OpTypeInt 32 0
137         %11 = OpConstant %10 2
138         %12 = OpTypeArray %6 %11
139         %13 = OpTypeStruct %12
140         %14 = OpTypePointer Uniform %13
141         %15 = OpVariable %14 Uniform
142         %16 = OpTypeInt 32 1
143         %17 = OpConstant %16 0
144         %18 = OpTypePointer Uniform %6
145         %22 = OpTypeVector %6 4
146         %23 = OpTypePointer Function %22
147         %25 = OpConstant %10 0
148         %26 = OpTypePointer Function %6
149         %30 = OpTypeStruct %6
150         %31 = OpTypePointer Uniform %30
151         %32 = OpVariable %31 Uniform
152         %37 = OpTypeBool
153         %43 = OpConstant %16 1
154         %60 = OpTypePointer Output %22
155         %61 = OpVariable %60 Output
156          %4 = OpFunction %2 None %3
157          %5 = OpLabel
158          %9 = OpVariable %8 Function
159         %24 = OpVariable %23 Function
160         %19 = OpAccessChain %18 %15 %17 %17
161         %20 = OpLoad %6 %19
162         %21 = OpCompositeConstruct %7 %20 %20
163               OpStore %9 %21
164         %27 = OpAccessChain %26 %9 %25
165         %28 = OpLoad %6 %27
166         %29 = OpCompositeConstruct %22 %28 %28 %28 %28
167               OpStore %24 %29
168         %33 = OpAccessChain %18 %32 %17
169         %34 = OpLoad %6 %33
170         %35 = OpAccessChain %18 %15 %17 %17
171         %36 = OpLoad %6 %35
172         %38 = OpFUnordNotEqual %37 %34 %36
173               OpSelectionMerge %40 None
174               OpBranchConditional %38 %39 %58
175         %39 = OpLabel
176         %41 = OpAccessChain %18 %32 %17
177         %42 = OpLoad %6 %41
178         %44 = OpAccessChain %18 %15 %17 %43
179         %45 = OpLoad %6 %44
180         %46 = OpFOrdEqual %37 %42 %45
181               OpSelectionMerge %48 None
182               OpBranchConditional %46 %47 %48
183         %47 = OpLabel
184               OpReturn
185         %48 = OpLabel
186         %50 = OpAccessChain %18 %15 %17 %17
187         %51 = OpLoad %6 %50
188         %53 = OpVectorShuffle %7 %29 %29 1 2
189         %54 = OpCompositeConstruct %7 %51 %51
190         %55 = OpFSub %7 %53 %54
191         %57 = OpVectorShuffle %22 %29 %55 0 4 5 3
192               OpStore %24 %57
193               OpBranch %40
194         %58 = OpLabel
195               OpKill
196         %40 = OpLabel
197               OpStore %61 %57
198               OpReturn
199               OpFunctionEnd
200END
201
202# uniforms for variant
203
204# zero
205BUFFER variant_zero DATA_TYPE float STD140 DATA
206 0.0
207END
208# _GLF_uniform_float_values
209BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
210 1.0 2.0
211END
212
213BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
214
215PIPELINE graphics variant_pipeline
216  ATTACH variant_vertex_shader
217  ATTACH variant_fragment_shader
218  FRAMEBUFFER_SIZE 256 256
219  BIND BUFFER variant_framebuffer AS color LOCATION 0
220  BIND BUFFER variant_zero AS uniform DESCRIPTOR_SET 0 BINDING 1
221  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
222END
223CLEAR_COLOR variant_pipeline 0 0 0 255
224
225CLEAR variant_pipeline
226RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
227
228EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
229