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1#!amber
2
3# Copyright 2022 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 LLVM 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_9 _GLF_uniform_int_values[2]
31#
32# precision highp float;
33# precision highp int;
34#
35# // Contents of _GLF_uniform_int_values: [1, 0, 9]
36# layout(set = 0, binding = 0) uniform buf0
37# {
38#     int _GLF_uniform_int_values[3];
39# };
40#
41# layout(location = 0) out vec4 _GLF_color;
42#
43# void main()
44# {
45#     int msb10 = _int_0 | 1024;
46#     int a = _int_0;
47#
48#     // Iterated nine times.
49#     for(int i = _int_1; i < findLSB(msb10); i++)
50#     {
51#         a++;
52#     }
53#
54#     // Always true.
55#     if(a == _int_9)
56#     {
57#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
58#     }
59#     else
60#     {
61#         _GLF_color = vec4(_int_0);
62#     }
63# }
64SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
65; SPIR-V
66; Version: 1.0
67; Generator: Khronos Glslang Reference Front End; 10
68; Bound: 71
69; Schema: 0
70               OpCapability Shader
71          %1 = OpExtInstImport "GLSL.std.450"
72               OpMemoryModel Logical GLSL450
73               OpEntryPoint Fragment %4 "main" %52
74               OpExecutionMode %4 OriginUpperLeft
75               OpSource ESSL 320
76               OpName %4 "main"
77               OpName %8 "msb10"
78               OpName %12 "buf0"
79               OpMemberName %12 0 "_GLF_uniform_int_values"
80               OpName %14 ""
81               OpName %22 "a"
82               OpName %25 "i"
83               OpName %52 "_GLF_color"
84               OpDecorate %11 ArrayStride 16
85               OpMemberDecorate %12 0 Offset 0
86               OpDecorate %12 Block
87               OpDecorate %14 DescriptorSet 0
88               OpDecorate %14 Binding 0
89               OpDecorate %52 Location 0
90          %2 = OpTypeVoid
91          %3 = OpTypeFunction %2
92          %6 = OpTypeInt 32 1
93          %7 = OpTypePointer Function %6
94          %9 = OpTypeInt 32 0
95         %10 = OpConstant %9 3
96         %11 = OpTypeArray %6 %10
97         %12 = OpTypeStruct %11
98         %13 = OpTypePointer Uniform %12
99         %14 = OpVariable %13 Uniform
100         %15 = OpConstant %6 0
101         %16 = OpConstant %6 1
102         %17 = OpTypePointer Uniform %6
103         %20 = OpConstant %6 1024
104         %36 = OpTypeBool
105         %43 = OpConstant %6 2
106         %49 = OpTypeFloat 32
107         %50 = OpTypeVector %49 4
108         %51 = OpTypePointer Output %50
109         %52 = OpVariable %51 Output
110          %4 = OpFunction %2 None %3
111          %5 = OpLabel
112          %8 = OpVariable %7 Function
113         %22 = OpVariable %7 Function
114         %25 = OpVariable %7 Function
115         %18 = OpAccessChain %17 %14 %15 %16
116         %19 = OpLoad %6 %18
117         %21 = OpBitwiseOr %6 %19 %20
118               OpStore %8 %21
119         %23 = OpAccessChain %17 %14 %15 %16
120         %24 = OpLoad %6 %23
121               OpStore %22 %24
122         %26 = OpAccessChain %17 %14 %15 %15
123         %27 = OpLoad %6 %26
124               OpStore %25 %27
125               OpBranch %28
126         %28 = OpLabel
127               OpLoopMerge %30 %31 None
128               OpBranch %32
129         %32 = OpLabel
130         %33 = OpLoad %6 %25
131         %34 = OpLoad %6 %8
132         %35 = OpExtInst %6 %1 FindILsb %34
133         %37 = OpSLessThan %36 %33 %35
134               OpBranchConditional %37 %29 %30
135         %29 = OpLabel
136         %38 = OpLoad %6 %22
137         %39 = OpIAdd %6 %38 %16
138               OpStore %22 %39
139               OpBranch %31
140         %31 = OpLabel
141         %40 = OpLoad %6 %25
142         %41 = OpIAdd %6 %40 %16
143               OpStore %25 %41
144               OpBranch %28
145         %30 = OpLabel
146         %42 = OpLoad %6 %22
147         %44 = OpAccessChain %17 %14 %15 %43
148         %45 = OpLoad %6 %44
149         %46 = OpIEqual %36 %42 %45
150               OpSelectionMerge %48 None
151               OpBranchConditional %46 %47 %66
152         %47 = OpLabel
153         %53 = OpAccessChain %17 %14 %15 %15
154         %54 = OpLoad %6 %53
155         %55 = OpConvertSToF %49 %54
156         %56 = OpAccessChain %17 %14 %15 %16
157         %57 = OpLoad %6 %56
158         %58 = OpConvertSToF %49 %57
159         %59 = OpAccessChain %17 %14 %15 %16
160         %60 = OpLoad %6 %59
161         %61 = OpConvertSToF %49 %60
162         %62 = OpAccessChain %17 %14 %15 %15
163         %63 = OpLoad %6 %62
164         %64 = OpConvertSToF %49 %63
165         %65 = OpCompositeConstruct %50 %55 %58 %61 %64
166               OpStore %52 %65
167               OpBranch %48
168         %66 = OpLabel
169         %67 = OpAccessChain %17 %14 %15 %16
170         %68 = OpLoad %6 %67
171         %69 = OpConvertSToF %49 %68
172         %70 = OpCompositeConstruct %50 %69 %69 %69 %69
173               OpStore %52 %70
174               OpBranch %48
175         %48 = OpLabel
176               OpReturn
177               OpFunctionEnd
178END
179
180# uniforms for variant
181
182# _GLF_uniform_int_values
183BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
184 1 0 9
185END
186
187BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
188
189PIPELINE graphics variant_pipeline
190  ATTACH variant_vertex_shader
191  ATTACH variant_fragment_shader
192  FRAMEBUFFER_SIZE 32 32
193  BIND BUFFER variant_framebuffer AS color LOCATION 0
194  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
195END
196CLEAR_COLOR variant_pipeline 0 0 0 255
197
198CLEAR variant_pipeline
199RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
200
201EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
202