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 BRW 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#
31# precision highp int;
32# precision highp float;
33#
34# // Contents of _GLF_uniform_int_values: [1, 0]
35# layout(set = 0, binding = 0) uniform buf0
36# {
37#     int _GLF_uniform_int_values[2];
38# };
39#
40# layout(location = 0) out vec4 _GLF_color;
41#
42# void main()
43# {
44#     // Always selects ~0.
45#     int a = int(gl_FragCoord.x) < _int_0 ? 0 : ~0;
46#
47#     for (int i = 0; i < 5; i ++)
48#     {
49#         a /= 2;
50#     }
51#
52#     // Always true.
53#     if (a == ~0 / 32)
54#     {
55#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
56#     }
57#     else
58#     {
59#         _GLF_color = vec4(_int_0);
60#     }
61# }
62SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
63; SPIR-V
64; Version: 1.0
65; Generator: Khronos Glslang Reference Front End; 10
66; Bound: 71
67; Schema: 0
68               OpCapability Shader
69          %1 = OpExtInstImport "GLSL.std.450"
70               OpMemoryModel Logical GLSL450
71               OpEntryPoint Fragment %4 "main" %12 %52
72               OpExecutionMode %4 OriginUpperLeft
73               OpSource ESSL 320
74               OpName %4 "main"
75               OpName %8 "a"
76               OpName %12 "gl_FragCoord"
77               OpName %21 "buf0"
78               OpMemberName %21 0 "_GLF_uniform_int_values"
79               OpName %23 ""
80               OpName %33 "i"
81               OpName %52 "_GLF_color"
82               OpDecorate %12 BuiltIn FragCoord
83               OpDecorate %20 ArrayStride 16
84               OpMemberDecorate %21 0 Offset 0
85               OpDecorate %21 Block
86               OpDecorate %23 DescriptorSet 0
87               OpDecorate %23 Binding 0
88               OpDecorate %52 Location 0
89          %2 = OpTypeVoid
90          %3 = OpTypeFunction %2
91          %6 = OpTypeInt 32 1
92          %7 = OpTypePointer Function %6
93          %9 = OpTypeFloat 32
94         %10 = OpTypeVector %9 4
95         %11 = OpTypePointer Input %10
96         %12 = OpVariable %11 Input
97         %13 = OpTypeInt 32 0
98         %14 = OpConstant %13 0
99         %15 = OpTypePointer Input %9
100         %19 = OpConstant %13 2
101         %20 = OpTypeArray %6 %19
102         %21 = OpTypeStruct %20
103         %22 = OpTypePointer Uniform %21
104         %23 = OpVariable %22 Uniform
105         %24 = OpConstant %6 0
106         %25 = OpConstant %6 1
107         %26 = OpTypePointer Uniform %6
108         %29 = OpTypeBool
109         %31 = OpConstant %6 -1
110         %40 = OpConstant %6 5
111         %42 = OpConstant %6 2
112         %51 = OpTypePointer Output %10
113         %52 = OpVariable %51 Output
114          %4 = OpFunction %2 None %3
115          %5 = OpLabel
116          %8 = OpVariable %7 Function
117         %33 = OpVariable %7 Function
118         %16 = OpAccessChain %15 %12 %14
119         %17 = OpLoad %9 %16
120         %18 = OpConvertFToS %6 %17
121         %27 = OpAccessChain %26 %23 %24 %25
122         %28 = OpLoad %6 %27
123         %30 = OpSLessThan %29 %18 %28
124         %32 = OpSelect %6 %30 %24 %31
125               OpStore %8 %32
126               OpStore %33 %24
127               OpBranch %34
128         %34 = OpLabel
129               OpLoopMerge %36 %37 None
130               OpBranch %38
131         %38 = OpLabel
132         %39 = OpLoad %6 %33
133         %41 = OpSLessThan %29 %39 %40
134               OpBranchConditional %41 %35 %36
135         %35 = OpLabel
136         %43 = OpLoad %6 %8
137         %44 = OpSDiv %6 %43 %42
138               OpStore %8 %44
139               OpBranch %37
140         %37 = OpLabel
141         %45 = OpLoad %6 %33
142         %46 = OpIAdd %6 %45 %25
143               OpStore %33 %46
144               OpBranch %34
145         %36 = OpLabel
146         %47 = OpLoad %6 %8
147         %48 = OpIEqual %29 %47 %24
148               OpSelectionMerge %50 None
149               OpBranchConditional %48 %49 %66
150         %49 = OpLabel
151         %53 = OpAccessChain %26 %23 %24 %24
152         %54 = OpLoad %6 %53
153         %55 = OpConvertSToF %9 %54
154         %56 = OpAccessChain %26 %23 %24 %25
155         %57 = OpLoad %6 %56
156         %58 = OpConvertSToF %9 %57
157         %59 = OpAccessChain %26 %23 %24 %25
158         %60 = OpLoad %6 %59
159         %61 = OpConvertSToF %9 %60
160         %62 = OpAccessChain %26 %23 %24 %24
161         %63 = OpLoad %6 %62
162         %64 = OpConvertSToF %9 %63
163         %65 = OpCompositeConstruct %10 %55 %58 %61 %64
164               OpStore %52 %65
165               OpBranch %50
166         %66 = OpLabel
167         %67 = OpAccessChain %26 %23 %24 %25
168         %68 = OpLoad %6 %67
169         %69 = OpConvertSToF %9 %68
170         %70 = OpCompositeConstruct %10 %69 %69 %69 %69
171               OpStore %52 %70
172               OpBranch %50
173         %50 = OpLabel
174               OpReturn
175               OpFunctionEnd
176END
177
178# uniforms for variant
179
180# _GLF_uniform_int_values
181BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
182 1 0
183END
184
185BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
186
187PIPELINE graphics variant_pipeline
188  ATTACH variant_vertex_shader
189  ATTACH variant_fragment_shader
190  FRAMEBUFFER_SIZE 256 256
191  BIND BUFFER variant_framebuffer AS color LOCATION 0
192  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
193END
194CLEAR_COLOR variant_pipeline 0 0 0 255
195
196CLEAR variant_pipeline
197RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
198
199EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
200