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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 _int_1 _GLF_uniform_int_values[1]
30#
31# precision highp int;
32# precision highp float;
33#
34# // Contents of _GLF_uniform_int_values: [0, 1]
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# // This function returns 0.
43# int func()
44# {
45#     return findLSB(ivec2(1)).g;
46# }
47#
48# void main()
49# {
50#     // Always true.
51#     if(func() == _int_0)
52#     {
53#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
54#     }
55#     else
56#     {
57#         _GLF_color = vec4(_int_0);
58#     }
59# }
60SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
61; SPIR-V
62; Version: 1.0
63; Generator: Khronos Glslang Reference Front End; 10
64; Bound: 58
65; Schema: 0
66               OpCapability Shader
67          %1 = OpExtInstImport "GLSL.std.450"
68               OpMemoryModel Logical GLSL450
69               OpEntryPoint Fragment %4 "main" %39
70               OpExecutionMode %4 OriginUpperLeft
71               OpSource ESSL 320
72               OpName %4 "main"
73               OpName %8 "func("
74               OpName %25 "buf0"
75               OpMemberName %25 0 "_GLF_uniform_int_values"
76               OpName %27 ""
77               OpName %39 "_GLF_color"
78               OpDecorate %13 RelaxedPrecision
79               OpDecorate %16 RelaxedPrecision
80               OpDecorate %24 ArrayStride 16
81               OpMemberDecorate %25 0 Offset 0
82               OpDecorate %25 Block
83               OpDecorate %27 DescriptorSet 0
84               OpDecorate %27 Binding 0
85               OpDecorate %39 Location 0
86          %2 = OpTypeVoid
87          %3 = OpTypeFunction %2
88          %6 = OpTypeInt 32 1
89          %7 = OpTypeFunction %6
90         %10 = OpTypeVector %6 2
91         %11 = OpConstant %6 1
92         %12 = OpConstantComposite %10 %11 %11
93         %14 = OpTypeInt 32 0
94         %15 = OpConstant %14 1
95         %17 = OpTypePointer Function %6
96         %23 = OpConstant %14 2
97         %24 = OpTypeArray %6 %23
98         %25 = OpTypeStruct %24
99         %26 = OpTypePointer Uniform %25
100         %27 = OpVariable %26 Uniform
101         %28 = OpConstant %6 0
102         %29 = OpTypePointer Uniform %6
103         %32 = OpTypeBool
104         %36 = OpTypeFloat 32
105         %37 = OpTypeVector %36 4
106         %38 = OpTypePointer Output %37
107         %39 = OpVariable %38 Output
108          %4 = OpFunction %2 None %3
109          %5 = OpLabel
110         %22 = OpFunctionCall %6 %8
111         %30 = OpAccessChain %29 %27 %28 %28
112         %31 = OpLoad %6 %30
113         %33 = OpIEqual %32 %22 %31
114               OpSelectionMerge %35 None
115               OpBranchConditional %33 %34 %53
116         %34 = OpLabel
117         %40 = OpAccessChain %29 %27 %28 %11
118         %41 = OpLoad %6 %40
119         %42 = OpConvertSToF %36 %41
120         %43 = OpAccessChain %29 %27 %28 %28
121         %44 = OpLoad %6 %43
122         %45 = OpConvertSToF %36 %44
123         %46 = OpAccessChain %29 %27 %28 %28
124         %47 = OpLoad %6 %46
125         %48 = OpConvertSToF %36 %47
126         %49 = OpAccessChain %29 %27 %28 %11
127         %50 = OpLoad %6 %49
128         %51 = OpConvertSToF %36 %50
129         %52 = OpCompositeConstruct %37 %42 %45 %48 %51
130               OpStore %39 %52
131               OpBranch %35
132         %53 = OpLabel
133         %54 = OpAccessChain %29 %27 %28 %28
134         %55 = OpLoad %6 %54
135         %56 = OpConvertSToF %36 %55
136         %57 = OpCompositeConstruct %37 %56 %56 %56 %56
137               OpStore %39 %57
138               OpBranch %35
139         %35 = OpLabel
140               OpReturn
141               OpFunctionEnd
142          %8 = OpFunction %6 None %7
143          %9 = OpLabel
144         %18 = OpVariable %17 Function
145         %13 = OpExtInst %10 %1 FindILsb %12
146         %16 = OpCompositeExtract %6 %13 1
147               OpStore %18 %16
148         %19 = OpLoad %6 %18
149               OpReturnValue %19
150               OpFunctionEnd
151END
152
153# uniforms for variant
154
155# _GLF_uniform_int_values
156BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
157 0 1
158END
159
160BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
161
162PIPELINE graphics variant_pipeline
163  ATTACH variant_vertex_shader
164  ATTACH variant_fragment_shader
165  FRAMEBUFFER_SIZE 256 256
166  BIND BUFFER variant_framebuffer AS color LOCATION 0
167  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
168END
169CLEAR_COLOR variant_pipeline 0 0 0 255
170
171CLEAR variant_pipeline
172RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
173
174EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
175