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 GraphicsFuzz.
19
20# Short description: A fragment shader that covers a specific OpKill wrapping path.
21
22# The test passes because shader always writes red.
23
24# Optimized using spirv-opt with the following arguments:
25# '--convert-local-access-chains'
26# '--eliminate-dead-branches'
27# '--merge-blocks'
28# '--eliminate-local-single-store'
29# '--eliminate-dead-branches'
30# '--merge-return'
31# '--inline-entry-points-exhaustive'
32# '--copy-propagate-arrays'
33# '--if-conversion'
34# '--reduce-load-size'
35# '--convert-local-access-chains'
36# '--if-conversion'
37# '--redundancy-elimination'
38# '--if-conversion'
39# '--simplify-instructions'
40# '--scalar-replacement=100'
41# '--simplify-instructions'
42# '--if-conversion'
43# '--eliminate-dead-inserts'
44# '--eliminate-dead-branches'
45# '--eliminate-dead-code-aggressive'
46# spirv-opt commit hash: 9215c1b7df0029f27807e8c8d7ec80532ce90a87
47
48
49
50SHADER vertex variant_vertex_shader PASSTHROUGH
51
52# variant_fragment_shader is derived from the following GLSL:
53# #version 310 es
54# precision highp float;
55# precision highp int;
56#
57# layout(location = 0) out vec4 _GLF_color;
58# layout(set = 0, binding = 0) uniform buf0
59# {
60#     int five;
61# };
62#
63# float func(float x)
64# {
65#     if (x > 5.0)
66#     {
67#         if (gl_FragCoord.x < 0.5)
68#             discard;
69#         else if (gl_FragCoord.y < 0.5)
70#             discard;
71#     }
72#
73#     return x + 1.0;
74# }
75#
76# void main()
77# {
78#     float f = 0.0;
79#
80#     for(int i = 0; i < five; i++)
81#         f = func(float(i));
82#
83#     if (f == 5.0)
84#         _GLF_color = vec4(1, 0, 0, 1);
85#     else
86#         _GLF_color = vec4(0);
87# }
88SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
89; SPIR-V
90; Version: 1.0
91; Generator: Khronos Glslang Reference Front End; 8
92; Bound: 79
93; Schema: 0
94               OpCapability Shader
95          %1 = OpExtInstImport "GLSL.std.450"
96               OpMemoryModel Logical GLSL450
97               OpEntryPoint Fragment %4 "main" %20 %75
98               OpExecutionMode %4 OriginUpperLeft
99               OpSource ESSL 310
100               OpName %4 "main"
101               OpName %10 "func(f1;"
102               OpName %9 "x"
103               OpName %20 "gl_FragCoord"
104               OpName %44 "f"
105               OpName %48 "i"
106               OpName %56 "buf0"
107               OpMemberName %56 0 "five"
108               OpName %58 ""
109               OpName %65 "param"
110               OpName %75 "_GLF_color"
111               OpDecorate %20 BuiltIn FragCoord
112               OpMemberDecorate %56 0 Offset 0
113               OpDecorate %56 Block
114               OpDecorate %58 DescriptorSet 0
115               OpDecorate %58 Binding 0
116               OpDecorate %75 Location 0
117          %2 = OpTypeVoid
118          %3 = OpTypeFunction %2
119          %6 = OpTypeFloat 32
120          %7 = OpTypePointer Function %6
121          %8 = OpTypeFunction %6 %7
122         %13 = OpConstant %6 5
123         %14 = OpTypeBool
124         %18 = OpTypeVector %6 4
125         %19 = OpTypePointer Input %18
126         %20 = OpVariable %19 Input
127         %21 = OpTypeInt 32 0
128         %22 = OpConstant %21 0
129         %23 = OpTypePointer Input %6
130         %26 = OpConstant %6 0.5
131         %32 = OpConstant %21 1
132         %40 = OpConstant %6 1
133         %45 = OpConstant %6 0
134         %46 = OpTypeInt 32 1
135         %47 = OpTypePointer Function %46
136         %49 = OpConstant %46 0
137         %56 = OpTypeStruct %46
138         %57 = OpTypePointer Uniform %56
139         %58 = OpVariable %57 Uniform
140         %59 = OpTypePointer Uniform %46
141         %68 = OpConstant %46 1
142         %74 = OpTypePointer Output %18
143         %75 = OpVariable %74 Output
144         %76 = OpConstantComposite %18 %40 %45 %45 %40
145         %78 = OpConstantComposite %18 %45 %45 %45 %45
146          %4 = OpFunction %2 None %3
147          %5 = OpLabel
148         %44 = OpVariable %7 Function
149         %48 = OpVariable %47 Function
150         %65 = OpVariable %7 Function
151               OpStore %44 %45
152               OpStore %48 %49
153               OpBranch %50
154         %50 = OpLabel
155         %55 = OpLoad %46 %48
156         %60 = OpAccessChain %59 %58 %49
157         %61 = OpLoad %46 %60
158         %62 = OpSLessThan %14 %55 %61
159               OpLoopMerge %52 %51 None
160               OpBranchConditional %62 %51 %52
161         %51 = OpLabel
162         %63 = OpLoad %46 %48
163         %64 = OpConvertSToF %6 %63
164               OpStore %65 %64
165         %66 = OpFunctionCall %6 %10 %65
166               OpStore %44 %66
167         %67 = OpLoad %46 %48
168         %69 = OpIAdd %46 %67 %68
169               OpStore %48 %69
170               OpBranch %50
171         %52 = OpLabel
172         %70 = OpLoad %6 %44
173         %71 = OpFOrdEqual %14 %70 %13
174               OpSelectionMerge %73 None
175               OpBranchConditional %71 %72 %77
176         %72 = OpLabel
177               OpStore %75 %76
178               OpBranch %73
179         %77 = OpLabel
180               OpStore %75 %78
181               OpBranch %73
182         %73 = OpLabel
183               OpReturn
184               OpFunctionEnd
185         %10 = OpFunction %6 None %8
186          %9 = OpFunctionParameter %7
187         %11 = OpLabel
188         %12 = OpLoad %6 %9
189         %15 = OpFOrdGreaterThan %14 %12 %13
190               OpSelectionMerge %17 None
191               OpBranchConditional %15 %16 %17
192         %16 = OpLabel
193         %24 = OpAccessChain %23 %20 %22
194         %25 = OpLoad %6 %24
195         %27 = OpFOrdLessThan %14 %25 %26
196               OpSelectionMerge %29 None
197               OpBranchConditional %27 %28 %31
198         %28 = OpLabel
199               OpKill
200         %31 = OpLabel
201         %33 = OpAccessChain %23 %20 %32
202         %34 = OpLoad %6 %33
203         %35 = OpFOrdLessThan %14 %34 %26
204               OpSelectionMerge %37 None
205               OpBranchConditional %35 %36 %37
206         %36 = OpLabel
207               OpKill
208         %37 = OpLabel
209               OpBranch %29
210         %29 = OpLabel
211               OpBranch %17
212         %17 = OpLabel
213         %39 = OpLoad %6 %9
214         %41 = OpFAdd %6 %39 %40
215               OpReturnValue %41
216               OpFunctionEnd
217END
218
219# uniforms for variant
220
221# five
222BUFFER variant_five DATA_TYPE int32 DATA
223 5
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_five 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