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
24# Optimized using spirv-opt with the following arguments:
25# '-O'
26# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af
27
28
29
30SHADER vertex variant_vertex_shader PASSTHROUGH
31
32# variant_fragment_shader is derived from the following GLSL:
33# #version 320 es
34# #define _int_1 _GLF_uniform_int_values[0]
35# #define _int_0 _GLF_uniform_int_values[1]
36# #define _float_1_0 _GLF_uniform_float_values[0]
37#
38# precision highp float;
39# precision highp int;
40#
41# // Contents of _GLF_uniform_float_values: 1.0
42# layout(set = 0, binding = 0) uniform buf0
43# {
44#     float _GLF_uniform_float_values[1];
45# };
46#
47# // Contents of _GLF_uniform_int_values: [1, 0]
48# layout(set = 0, binding = 1) uniform buf1
49# {
50#     int _GLF_uniform_int_values[2];
51# };
52#
53# const int _GLF_global_loop_bound = 5;
54# int _GLF_global_loop_count = 0;
55#
56# layout(location = 0) out vec4 _GLF_color;
57#
58# void main()
59# {
60#     int i = 1;
61#
62#     // Loops until the global loop bound is reached.
63#     do
64#     {
65#         _GLF_global_loop_count++;
66#
67#         // Always true.
68#         if(gl_FragCoord.y > 0.0)
69#         {
70#             float f = _float_1_0;
71#             modf(_float_1_0, f);
72#             i++;
73#         }
74#
75#         // During the first iteration i becomes 3, making the i != 2 below always true.
76#         i++;
77#     }
78#     while(i != 2 && _GLF_global_loop_count < _GLF_global_loop_bound);
79#
80#     // Always true.
81#     if(i == 11)
82#     {
83#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
84#     }
85#     else
86#     {
87#         _GLF_color = vec4(_int_0);
88#     }
89# }
90SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
91; SPIR-V
92; Version: 1.0
93; Generator: Khronos Glslang Reference Front End; 10
94; Bound: 90
95; Schema: 0
96               OpCapability Shader
97          %1 = OpExtInstImport "GLSL.std.450"
98               OpMemoryModel Logical GLSL450
99               OpEntryPoint Fragment %4 "main" %22 %62
100               OpExecutionMode %4 OriginUpperLeft
101               OpSource ESSL 320
102               OpName %4 "main"
103               OpName %22 "gl_FragCoord"
104               OpName %34 "f"
105               OpName %36 "buf0"
106               OpMemberName %36 0 "_GLF_uniform_float_values"
107               OpName %38 ""
108               OpName %62 "_GLF_color"
109               OpName %65 "buf1"
110               OpMemberName %65 0 "_GLF_uniform_int_values"
111               OpName %67 ""
112               OpDecorate %22 BuiltIn FragCoord
113               OpDecorate %35 ArrayStride 16
114               OpMemberDecorate %36 0 Offset 0
115               OpDecorate %36 Block
116               OpDecorate %38 DescriptorSet 0
117               OpDecorate %38 Binding 0
118               OpDecorate %62 Location 0
119               OpDecorate %64 ArrayStride 16
120               OpMemberDecorate %65 0 Offset 0
121               OpDecorate %65 Block
122               OpDecorate %67 DescriptorSet 0
123               OpDecorate %67 Binding 1
124          %2 = OpTypeVoid
125          %3 = OpTypeFunction %2
126          %6 = OpTypeInt 32 1
127          %9 = OpConstant %6 0
128         %12 = OpConstant %6 1
129         %19 = OpTypeFloat 32
130         %20 = OpTypeVector %19 4
131         %21 = OpTypePointer Input %20
132         %22 = OpVariable %21 Input
133         %23 = OpTypeInt 32 0
134         %24 = OpConstant %23 1
135         %25 = OpTypePointer Input %19
136         %28 = OpConstant %19 0
137         %29 = OpTypeBool
138         %33 = OpTypePointer Function %19
139         %35 = OpTypeArray %19 %24
140         %36 = OpTypeStruct %35
141         %37 = OpTypePointer Uniform %36
142         %38 = OpVariable %37 Uniform
143         %39 = OpTypePointer Uniform %19
144         %50 = OpConstant %6 2
145         %53 = OpConstant %6 5
146         %57 = OpConstant %6 11
147         %61 = OpTypePointer Output %20
148         %62 = OpVariable %61 Output
149         %63 = OpConstant %23 2
150         %64 = OpTypeArray %6 %63
151         %65 = OpTypeStruct %64
152         %66 = OpTypePointer Uniform %65
153         %67 = OpVariable %66 Uniform
154         %68 = OpTypePointer Uniform %6
155          %4 = OpFunction %2 None %3
156          %5 = OpLabel
157         %34 = OpVariable %33 Function
158               OpBranch %13
159         %13 = OpLabel
160         %88 = OpPhi %6 %12 %5 %48 %16
161         %87 = OpPhi %6 %9 %5 %18 %16
162               OpLoopMerge %15 %16 None
163               OpBranch %14
164         %14 = OpLabel
165         %18 = OpIAdd %6 %87 %12
166         %26 = OpAccessChain %25 %22 %24
167         %27 = OpLoad %19 %26
168         %30 = OpFOrdGreaterThan %29 %27 %28
169               OpSelectionMerge %32 None
170               OpBranchConditional %30 %31 %32
171         %31 = OpLabel
172         %42 = OpAccessChain %39 %38 %9 %9
173         %43 = OpLoad %19 %42
174         %44 = OpExtInst %19 %1 Modf %43 %34
175         %46 = OpIAdd %6 %88 %12
176               OpBranch %32
177         %32 = OpLabel
178         %89 = OpPhi %6 %88 %14 %46 %31
179         %48 = OpIAdd %6 %89 %12
180               OpBranch %16
181         %16 = OpLabel
182         %51 = OpINotEqual %29 %48 %50
183         %54 = OpSLessThan %29 %18 %53
184         %55 = OpLogicalAnd %29 %51 %54
185               OpBranchConditional %55 %13 %15
186         %15 = OpLabel
187         %58 = OpIEqual %29 %48 %57
188               OpSelectionMerge %60 None
189               OpBranchConditional %58 %59 %82
190         %59 = OpLabel
191         %69 = OpAccessChain %68 %67 %9 %9
192         %70 = OpLoad %6 %69
193         %71 = OpConvertSToF %19 %70
194         %72 = OpAccessChain %68 %67 %9 %12
195         %73 = OpLoad %6 %72
196         %74 = OpConvertSToF %19 %73
197         %81 = OpCompositeConstruct %20 %71 %74 %74 %71
198               OpStore %62 %81
199               OpBranch %60
200         %82 = OpLabel
201         %83 = OpAccessChain %68 %67 %9 %12
202         %84 = OpLoad %6 %83
203         %85 = OpConvertSToF %19 %84
204         %86 = OpCompositeConstruct %20 %85 %85 %85 %85
205               OpStore %62 %86
206               OpBranch %60
207         %60 = OpLabel
208               OpReturn
209               OpFunctionEnd
210END
211
212# uniforms for variant
213
214# _GLF_uniform_int_values
215BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
216 1 0
217END
218# _GLF_uniform_float_values
219BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
220 1.0
221END
222
223BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
224
225PIPELINE graphics variant_pipeline
226  ATTACH variant_vertex_shader
227  ATTACH variant_fragment_shader
228  FRAMEBUFFER_SIZE 32 32
229  BIND BUFFER variant_framebuffer AS color LOCATION 0
230  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
231  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
232END
233CLEAR_COLOR variant_pipeline 0 0 0 255
234
235CLEAR variant_pipeline
236RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
237
238EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
239