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1#!amber
2
3# Copyright 2021 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_0 _GLF_uniform_int_values[0]
29# #define _float_0_0 _GLF_uniform_float_values[0]
30# #define _float_1_5 _GLF_uniform_float_values[1]
31#
32# precision highp int;
33# precision highp float;
34#
35# // Contents of _GLF_uniform_int_values: 0
36# layout(set = 0, binding = 0) uniform buf0
37# {
38#     int _GLF_uniform_int_values[1];
39# };
40# // Contents of _GLF_uniform_float_values: [0.0, 1.5]
41# layout(set = 0, binding = 1) uniform buf1 {
42#     float _GLF_uniform_float_values[2];
43# };
44# layout(location = 0) out vec4 _GLF_color;
45#
46# void main()
47# {
48#     float a = _float_1_5;
49#     _GLF_color = vec4(_int_0);
50#
51#     // Always true.
52#     if(gl_FragCoord.y > _float_0_0)
53#     {
54#         _GLF_color = vec4(1);
55#     }
56#
57#     // Always true.
58#     if(gl_FragCoord.x > _float_0_0)
59#     {
60#         _GLF_color = vec4(2);
61#     }
62#
63#     // Always true.
64#     if(gl_FragCoord.x > _float_0_0)
65#     {
66#         _GLF_color = vec4(1, 0, 0, 1);
67#
68#         // Always true.
69#         if(gl_FragCoord.y > _float_0_0)
70#         {
71#             // Result is unused.
72#             fract(a);
73#         }
74#     }
75# }
76SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
77; SPIR-V
78; Version: 1.0
79; Generator: Khronos Glslang Reference Front End; 10
80; Bound: 75
81; Schema: 0
82               OpCapability Shader
83          %1 = OpExtInstImport "GLSL.std.450"
84               OpMemoryModel Logical GLSL450
85               OpEntryPoint Fragment %4 "main" %23 %35
86               OpExecutionMode %4 OriginUpperLeft
87               OpSource ESSL 320
88               OpName %4 "main"
89               OpName %8 "a"
90               OpName %12 "buf1"
91               OpMemberName %12 0 "_GLF_uniform_float_values"
92               OpName %14 ""
93               OpName %23 "_GLF_color"
94               OpName %26 "buf0"
95               OpMemberName %26 0 "_GLF_uniform_int_values"
96               OpName %28 ""
97               OpName %35 "gl_FragCoord"
98               OpDecorate %11 ArrayStride 16
99               OpMemberDecorate %12 0 Offset 0
100               OpDecorate %12 Block
101               OpDecorate %14 DescriptorSet 0
102               OpDecorate %14 Binding 1
103               OpDecorate %23 Location 0
104               OpDecorate %25 ArrayStride 16
105               OpMemberDecorate %26 0 Offset 0
106               OpDecorate %26 Block
107               OpDecorate %28 DescriptorSet 0
108               OpDecorate %28 Binding 0
109               OpDecorate %35 BuiltIn FragCoord
110          %2 = OpTypeVoid
111          %3 = OpTypeFunction %2
112          %6 = OpTypeFloat 32
113          %7 = OpTypePointer Function %6
114          %9 = OpTypeInt 32 0
115         %10 = OpConstant %9 2
116         %11 = OpTypeArray %6 %10
117         %12 = OpTypeStruct %11
118         %13 = OpTypePointer Uniform %12
119         %14 = OpVariable %13 Uniform
120         %15 = OpTypeInt 32 1
121         %16 = OpConstant %15 0
122         %17 = OpConstant %15 1
123         %18 = OpTypePointer Uniform %6
124         %21 = OpTypeVector %6 4
125         %22 = OpTypePointer Output %21
126         %23 = OpVariable %22 Output
127         %24 = OpConstant %9 1
128         %25 = OpTypeArray %15 %24
129         %26 = OpTypeStruct %25
130         %27 = OpTypePointer Uniform %26
131         %28 = OpVariable %27 Uniform
132         %29 = OpTypePointer Uniform %15
133         %34 = OpTypePointer Input %21
134         %35 = OpVariable %34 Input
135         %36 = OpTypePointer Input %6
136         %41 = OpTypeBool
137         %45 = OpConstant %6 1
138         %46 = OpConstantComposite %21 %45 %45 %45 %45
139         %47 = OpConstant %9 0
140         %55 = OpConstant %6 2
141         %56 = OpConstantComposite %21 %55 %55 %55 %55
142         %64 = OpConstant %6 0
143         %65 = OpConstantComposite %21 %45 %64 %64 %45
144          %4 = OpFunction %2 None %3
145          %5 = OpLabel
146          %8 = OpVariable %7 Function
147         %19 = OpAccessChain %18 %14 %16 %17
148         %20 = OpLoad %6 %19
149               OpStore %8 %20
150         %30 = OpAccessChain %29 %28 %16 %16
151         %31 = OpLoad %15 %30
152         %32 = OpConvertSToF %6 %31
153         %33 = OpCompositeConstruct %21 %32 %32 %32 %32
154               OpStore %23 %33
155         %37 = OpAccessChain %36 %35 %24
156         %38 = OpLoad %6 %37
157         %39 = OpAccessChain %18 %14 %16 %16
158         %40 = OpLoad %6 %39
159         %42 = OpFOrdGreaterThan %41 %38 %40
160               OpSelectionMerge %44 None
161               OpBranchConditional %42 %43 %44
162         %43 = OpLabel
163               OpStore %23 %46
164               OpBranch %44
165         %44 = OpLabel
166         %48 = OpAccessChain %36 %35 %47
167         %49 = OpLoad %6 %48
168         %50 = OpAccessChain %18 %14 %16 %16
169         %51 = OpLoad %6 %50
170         %52 = OpFOrdGreaterThan %41 %49 %51
171               OpSelectionMerge %54 None
172               OpBranchConditional %52 %53 %54
173         %53 = OpLabel
174               OpStore %23 %56
175               OpBranch %54
176         %54 = OpLabel
177         %57 = OpAccessChain %36 %35 %47
178         %58 = OpLoad %6 %57
179         %59 = OpAccessChain %18 %14 %16 %16
180         %60 = OpLoad %6 %59
181         %61 = OpFOrdGreaterThan %41 %58 %60
182               OpSelectionMerge %63 None
183               OpBranchConditional %61 %62 %63
184         %62 = OpLabel
185               OpStore %23 %65
186         %66 = OpAccessChain %36 %35 %24
187         %67 = OpLoad %6 %66
188         %68 = OpAccessChain %18 %14 %16 %16
189         %69 = OpLoad %6 %68
190         %70 = OpFOrdGreaterThan %41 %67 %69
191               OpSelectionMerge %72 None
192               OpBranchConditional %70 %71 %72
193         %71 = OpLabel
194         %73 = OpLoad %6 %8
195         %74 = OpExtInst %6 %1 Fract %73
196               OpBranch %72
197         %72 = OpLabel
198               OpBranch %63
199         %63 = OpLabel
200               OpReturn
201               OpFunctionEnd
202END
203
204# uniforms for variant
205
206# _GLF_uniform_float_values
207BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
208 0.0 1.5
209END
210# _GLF_uniform_int_values
211BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
212 0
213END
214
215BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
216
217PIPELINE graphics variant_pipeline
218  ATTACH variant_vertex_shader
219  ATTACH variant_fragment_shader
220  FRAMEBUFFER_SIZE 256 256
221  BIND BUFFER variant_framebuffer AS color LOCATION 0
222  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 1
223  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
224END
225CLEAR_COLOR variant_pipeline 0 0 0 255
226
227CLEAR variant_pipeline
228RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
229
230EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
231