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_10 _GLF_uniform_int_values[0]
29# #define _int_25225 _GLF_uniform_int_values[1]
30# #define _int_0 _GLF_uniform_int_values[2]
31# #define _int_1 _GLF_uniform_int_values[3]
32#
33# precision highp float;
34# precision highp int;
35#
36# // Contents of _GLF_uniform_int_values: [10, 25225, 0, 1]
37# layout(set = 0, binding = 0) uniform buf0
38# {
39#     int _GLF_uniform_int_values[4];
40# };
41#
42# layout(location = 0) out vec4 _GLF_color;
43#
44# void main()
45# {
46#
47#     // a becomes -25235.
48#     int a = -25236 | _int_1;
49#
50#     // Increments a by ten.
51#     for(int i = _int_0; i < _int_10; i++)
52#     {
53#         a++;
54#     }
55#
56#     // Always true.
57#     if(a == -_int_25225)
58#     {
59#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
60#     }
61#     else
62#     {
63#         _GLF_color = vec4(_int_0);
64#     }
65# }
66SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
67; SPIR-V
68; Version: 1.0
69; Generator: Khronos Glslang Reference Front End; 10
70; Bound: 70
71; Schema: 0
72               OpCapability Shader
73          %1 = OpExtInstImport "GLSL.std.450"
74               OpMemoryModel Logical GLSL450
75               OpEntryPoint Fragment %4 "main" %51
76               OpExecutionMode %4 OriginUpperLeft
77               OpSource ESSL 320
78               OpName %4 "main"
79               OpName %8 "a"
80               OpName %13 "buf0"
81               OpMemberName %13 0 "_GLF_uniform_int_values"
82               OpName %15 ""
83               OpName %22 "i"
84               OpName %51 "_GLF_color"
85               OpDecorate %12 ArrayStride 16
86               OpMemberDecorate %13 0 Offset 0
87               OpDecorate %13 Block
88               OpDecorate %15 DescriptorSet 0
89               OpDecorate %15 Binding 0
90               OpDecorate %51 Location 0
91          %2 = OpTypeVoid
92          %3 = OpTypeFunction %2
93          %6 = OpTypeInt 32 1
94          %7 = OpTypePointer Function %6
95          %9 = OpConstant %6 -25236
96         %10 = OpTypeInt 32 0
97         %11 = OpConstant %10 4
98         %12 = OpTypeArray %6 %11
99         %13 = OpTypeStruct %12
100         %14 = OpTypePointer Uniform %13
101         %15 = OpVariable %14 Uniform
102         %16 = OpConstant %6 0
103         %17 = OpConstant %6 3
104         %18 = OpTypePointer Uniform %6
105         %23 = OpConstant %6 2
106         %34 = OpTypeBool
107         %37 = OpConstant %6 1
108         %48 = OpTypeFloat 32
109         %49 = OpTypeVector %48 4
110         %50 = OpTypePointer Output %49
111         %51 = OpVariable %50 Output
112          %4 = OpFunction %2 None %3
113          %5 = OpLabel
114          %8 = OpVariable %7 Function
115         %22 = OpVariable %7 Function
116         %19 = OpAccessChain %18 %15 %16 %17
117         %20 = OpLoad %6 %19
118         %21 = OpBitwiseOr %6 %9 %20
119               OpStore %8 %21
120         %24 = OpAccessChain %18 %15 %16 %23
121         %25 = OpLoad %6 %24
122               OpStore %22 %25
123               OpBranch %26
124         %26 = OpLabel
125               OpLoopMerge %28 %29 None
126               OpBranch %30
127         %30 = OpLabel
128         %31 = OpLoad %6 %22
129         %32 = OpAccessChain %18 %15 %16 %16
130         %33 = OpLoad %6 %32
131         %35 = OpSLessThan %34 %31 %33
132               OpBranchConditional %35 %27 %28
133         %27 = OpLabel
134         %36 = OpLoad %6 %8
135         %38 = OpIAdd %6 %36 %37
136               OpStore %8 %38
137               OpBranch %29
138         %29 = OpLabel
139         %39 = OpLoad %6 %22
140         %40 = OpIAdd %6 %39 %37
141               OpStore %22 %40
142               OpBranch %26
143         %28 = OpLabel
144         %41 = OpLoad %6 %8
145         %42 = OpAccessChain %18 %15 %16 %37
146         %43 = OpLoad %6 %42
147         %44 = OpSNegate %6 %43
148         %45 = OpIEqual %34 %41 %44
149               OpSelectionMerge %47 None
150               OpBranchConditional %45 %46 %65
151         %46 = OpLabel
152         %52 = OpAccessChain %18 %15 %16 %17
153         %53 = OpLoad %6 %52
154         %54 = OpConvertSToF %48 %53
155         %55 = OpAccessChain %18 %15 %16 %23
156         %56 = OpLoad %6 %55
157         %57 = OpConvertSToF %48 %56
158         %58 = OpAccessChain %18 %15 %16 %23
159         %59 = OpLoad %6 %58
160         %60 = OpConvertSToF %48 %59
161         %61 = OpAccessChain %18 %15 %16 %17
162         %62 = OpLoad %6 %61
163         %63 = OpConvertSToF %48 %62
164         %64 = OpCompositeConstruct %49 %54 %57 %60 %63
165               OpStore %51 %64
166               OpBranch %47
167         %65 = OpLabel
168         %66 = OpAccessChain %18 %15 %16 %23
169         %67 = OpLoad %6 %66
170         %68 = OpConvertSToF %48 %67
171         %69 = OpCompositeConstruct %49 %68 %68 %68 %68
172               OpStore %51 %69
173               OpBranch %47
174         %47 = OpLabel
175               OpReturn
176               OpFunctionEnd
177END
178
179# uniforms for variant
180
181# _GLF_uniform_int_values
182BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
183 10 25225 0 1
184END
185
186BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
187
188PIPELINE graphics variant_pipeline
189  ATTACH variant_vertex_shader
190  ATTACH variant_fragment_shader
191  FRAMEBUFFER_SIZE 32 32
192  BIND BUFFER variant_framebuffer AS color LOCATION 0
193  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
194END
195CLEAR_COLOR variant_pipeline 0 0 0 255
196
197CLEAR variant_pipeline
198RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
199
200EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
201