1#!amber
2
3# Copyright 2020 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 a specific instruction combine shifts code path
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 310 es
28# #define _int_0 _GLF_uniform_int_values[0]
29# #define _int_1 _GLF_uniform_int_values[1]
30#
31# precision highp float;
32# precision highp int;
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# void main()
43# {
44#     // Always zero.
45#     int i = bitfieldExtract(_int_0, bitCount(0), _int_1);
46#
47#     if (i == _int_0)
48#     {
49#         _GLF_color = vec4(_int_1, i, i, _int_1);
50#     }
51#     else
52#     {
53#         _GLF_color = vec4(i);
54#     }
55# }
56SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
57; SPIR-V
58; Version: 1.0
59; Generator: Khronos Glslang Reference Front End; 8
60; Bound: 50
61; Schema: 0
62               OpCapability Shader
63          %1 = OpExtInstImport "GLSL.std.450"
64               OpMemoryModel Logical GLSL450
65               OpEntryPoint Fragment %4 "main" %34
66               OpExecutionMode %4 OriginUpperLeft
67               OpSource ESSL 310
68               OpName %4 "main"
69               OpName %8 "i"
70               OpName %12 "buf0"
71               OpMemberName %12 0 "_GLF_uniform_int_values"
72               OpName %14 ""
73               OpName %34 "_GLF_color"
74               OpDecorate %11 ArrayStride 16
75               OpMemberDecorate %12 0 Offset 0
76               OpDecorate %12 Block
77               OpDecorate %14 DescriptorSet 0
78               OpDecorate %14 Binding 0
79               OpDecorate %19 RelaxedPrecision
80               OpDecorate %34 Location 0
81          %2 = OpTypeVoid
82          %3 = OpTypeFunction %2
83          %6 = OpTypeInt 32 1
84          %7 = OpTypePointer Function %6
85          %9 = OpTypeInt 32 0
86         %10 = OpConstant %9 2
87         %11 = OpTypeArray %6 %10
88         %12 = OpTypeStruct %11
89         %13 = OpTypePointer Uniform %12
90         %14 = OpVariable %13 Uniform
91         %15 = OpConstant %6 0
92         %16 = OpTypePointer Uniform %6
93         %20 = OpConstant %6 1
94         %27 = OpTypeBool
95         %31 = OpTypeFloat 32
96         %32 = OpTypeVector %31 4
97         %33 = OpTypePointer Output %32
98         %34 = OpVariable %33 Output
99          %4 = OpFunction %2 None %3
100          %5 = OpLabel
101          %8 = OpVariable %7 Function
102         %17 = OpAccessChain %16 %14 %15 %15
103         %18 = OpLoad %6 %17
104         %19 = OpBitCount %6 %15
105         %21 = OpAccessChain %16 %14 %15 %20
106         %22 = OpLoad %6 %21
107         %23 = OpBitFieldSExtract %6 %18 %19 %22
108               OpStore %8 %23
109         %24 = OpLoad %6 %8
110         %25 = OpAccessChain %16 %14 %15 %15
111         %26 = OpLoad %6 %25
112         %28 = OpIEqual %27 %24 %26
113               OpSelectionMerge %30 None
114               OpBranchConditional %28 %29 %46
115         %29 = OpLabel
116         %35 = OpAccessChain %16 %14 %15 %20
117         %36 = OpLoad %6 %35
118         %37 = OpConvertSToF %31 %36
119         %38 = OpLoad %6 %8
120         %39 = OpConvertSToF %31 %38
121         %40 = OpLoad %6 %8
122         %41 = OpConvertSToF %31 %40
123         %42 = OpAccessChain %16 %14 %15 %20
124         %43 = OpLoad %6 %42
125         %44 = OpConvertSToF %31 %43
126         %45 = OpCompositeConstruct %32 %37 %39 %41 %44
127               OpStore %34 %45
128               OpBranch %30
129         %46 = OpLabel
130         %47 = OpLoad %6 %8
131         %48 = OpConvertSToF %31 %47
132         %49 = OpCompositeConstruct %32 %48 %48 %48 %48
133               OpStore %34 %49
134               OpBranch %30
135         %30 = OpLabel
136               OpReturn
137               OpFunctionEnd
138END
139
140# uniforms for variant
141
142# _GLF_uniform_int_values
143BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
144 0 1
145END
146
147BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
148
149PIPELINE graphics variant_pipeline
150  ATTACH variant_vertex_shader
151  ATTACH variant_fragment_shader
152  FRAMEBUFFER_SIZE 256 256
153  BIND BUFFER variant_framebuffer AS color LOCATION 0
154  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
155END
156CLEAR_COLOR variant_pipeline 0 0 0 255
157
158CLEAR variant_pipeline
159RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
160
161EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
162