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 NIR 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# layout(location = 0) out vec4 _GLF_color;
40#
41# void main()
42# {
43#     int a = -7563;
44#
45#     // Always true.
46#     if(_int_1 / a == _int_0)
47#     {
48#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
49#     }
50#     else
51#     {
52#         _GLF_color = vec4(_int_0);
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; 10
59; Bound: 51
60; Schema: 0
61               OpCapability Shader
62          %1 = OpExtInstImport "GLSL.std.450"
63               OpMemoryModel Logical GLSL450
64               OpEntryPoint Fragment %4 "main" %32
65               OpExecutionMode %4 OriginUpperLeft
66               OpSource ESSL 320
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 %32 "_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 %32 Location 0
79          %2 = OpTypeVoid
80          %3 = OpTypeFunction %2
81          %6 = OpTypeInt 32 1
82          %7 = OpTypePointer Function %6
83          %9 = OpConstant %6 -7563
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 = OpConstant %6 1
92         %18 = OpTypePointer Uniform %6
93         %25 = OpTypeBool
94         %29 = OpTypeFloat 32
95         %30 = OpTypeVector %29 4
96         %31 = OpTypePointer Output %30
97         %32 = OpVariable %31 Output
98          %4 = OpFunction %2 None %3
99          %5 = OpLabel
100          %8 = OpVariable %7 Function
101               OpStore %8 %9
102         %19 = OpAccessChain %18 %15 %16 %17
103         %20 = OpLoad %6 %19
104         %21 = OpLoad %6 %8
105         %22 = OpSDiv %6 %20 %21
106         %23 = OpAccessChain %18 %15 %16 %16
107         %24 = OpLoad %6 %23
108         %26 = OpIEqual %25 %22 %24
109               OpSelectionMerge %28 None
110               OpBranchConditional %26 %27 %46
111         %27 = OpLabel
112         %33 = OpAccessChain %18 %15 %16 %17
113         %34 = OpLoad %6 %33
114         %35 = OpConvertSToF %29 %34
115         %36 = OpAccessChain %18 %15 %16 %16
116         %37 = OpLoad %6 %36
117         %38 = OpConvertSToF %29 %37
118         %39 = OpAccessChain %18 %15 %16 %16
119         %40 = OpLoad %6 %39
120         %41 = OpConvertSToF %29 %40
121         %42 = OpAccessChain %18 %15 %16 %17
122         %43 = OpLoad %6 %42
123         %44 = OpConvertSToF %29 %43
124         %45 = OpCompositeConstruct %30 %35 %38 %41 %44
125               OpStore %32 %45
126               OpBranch %28
127         %46 = OpLabel
128         %47 = OpAccessChain %18 %15 %16 %16
129         %48 = OpLoad %6 %47
130         %49 = OpConvertSToF %29 %48
131         %50 = OpCompositeConstruct %30 %49 %49 %49 %49
132               OpStore %32 %50
133               OpBranch %28
134         %28 = OpLabel
135               OpReturn
136               OpFunctionEnd
137END
138
139# uniforms for variant
140
141# _GLF_uniform_int_values
142BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
143 0 1
144END
145
146BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
147
148PIPELINE graphics variant_pipeline
149  ATTACH variant_vertex_shader
150  ATTACH variant_fragment_shader
151  FRAMEBUFFER_SIZE 256 256
152  BIND BUFFER variant_framebuffer AS color LOCATION 0
153  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
154END
155CLEAR_COLOR variant_pipeline 0 0 0 255
156
157CLEAR variant_pipeline
158RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
159
160EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
161