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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 simplification 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#
33# precision highp int;
34#
35# // Contents of _GLF_uniform_int_values: [0, 1]
36# layout(set = 0, binding = 0) uniform buf0
37# {
38#     int _GLF_uniform_int_values[2];
39# };
40#
41# layout(location = 0) out vec4 _GLF_color;
42#
43# void main()
44# {
45#     int a = 1 >> (_int_0 << 5) >> _int_0;
46#     if (a == 1)
47#     {
48#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
49#     }
50#     else
51#     {
52#         _GLF_color = vec4(a);
53#     }
54# }
55SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
56; SPIR-V
57; Version: 1.0
58; Generator: Khronos Glslang Reference Front End; 8
59; Bound: 52
60; Schema: 0
61               OpCapability Shader
62          %1 = OpExtInstImport "GLSL.std.450"
63               OpMemoryModel Logical GLSL450
64               OpEntryPoint Fragment %4 "main" %34
65               OpExecutionMode %4 OriginUpperLeft
66               OpSource ESSL 310
67               OpName %4 "main"
68               OpName %8 "a"
69               OpName %13 "buf0"
70               OpMemberName %13 0 "_GLF_uniform_int_values"
71               OpName %15 ""
72               OpName %34 "_GLF_color"
73               OpDecorate %12 ArrayStride 16
74               OpMemberDecorate %13 0 Offset 0
75               OpDecorate %13 Block
76               OpDecorate %15 DescriptorSet 0
77               OpDecorate %15 Binding 0
78               OpDecorate %34 Location 0
79          %2 = OpTypeVoid
80          %3 = OpTypeFunction %2
81          %6 = OpTypeInt 32 1
82          %7 = OpTypePointer Function %6
83          %9 = OpConstant %6 1
84         %10 = OpTypeInt 32 0
85         %11 = OpConstant %10 2
86         %12 = OpTypeArray %6 %11
87         %13 = OpTypeStruct %12
88         %14 = OpTypePointer Uniform %13
89         %15 = OpVariable %14 Uniform
90         %16 = OpConstant %6 0
91         %17 = OpTypePointer Uniform %6
92         %20 = OpConstant %6 5
93         %27 = OpTypeBool
94         %31 = OpTypeFloat 32
95         %32 = OpTypeVector %31 4
96         %33 = OpTypePointer Output %32
97         %34 = OpVariable %33 Output
98          %4 = OpFunction %2 None %3
99          %5 = OpLabel
100          %8 = OpVariable %7 Function
101         %18 = OpAccessChain %17 %15 %16 %16
102         %19 = OpLoad %6 %18
103         %21 = OpShiftLeftLogical %6 %19 %20
104         %22 = OpShiftRightArithmetic %6 %9 %21
105         %23 = OpAccessChain %17 %15 %16 %16
106         %24 = OpLoad %6 %23
107         %25 = OpShiftRightArithmetic %6 %22 %24
108               OpStore %8 %25
109         %26 = OpLoad %6 %8
110         %28 = OpIEqual %27 %26 %9
111               OpSelectionMerge %30 None
112               OpBranchConditional %28 %29 %48
113         %29 = OpLabel
114         %35 = OpAccessChain %17 %15 %16 %9
115         %36 = OpLoad %6 %35
116         %37 = OpConvertSToF %31 %36
117         %38 = OpAccessChain %17 %15 %16 %16
118         %39 = OpLoad %6 %38
119         %40 = OpConvertSToF %31 %39
120         %41 = OpAccessChain %17 %15 %16 %16
121         %42 = OpLoad %6 %41
122         %43 = OpConvertSToF %31 %42
123         %44 = OpAccessChain %17 %15 %16 %9
124         %45 = OpLoad %6 %44
125         %46 = OpConvertSToF %31 %45
126         %47 = OpCompositeConstruct %32 %37 %40 %43 %46
127               OpStore %34 %47
128               OpBranch %30
129         %48 = OpLabel
130         %49 = OpLoad %6 %8
131         %50 = OpConvertSToF %31 %49
132         %51 = OpCompositeConstruct %32 %50 %50 %50 %50
133               OpStore %34 %51
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