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_1 _GLF_uniform_int_values[0]
29# #define _int_0 _GLF_uniform_int_values[1]
30# #define _uint_2 _GLF_uniform_uint_values[0]
31# #define _uint_1 _GLF_uniform_uint_values[1]
32#
33# precision highp float;
34# precision highp int;
35#
36# // Contents of _GLF_uniform_uint_values: [2, 1]
37# layout(set = 0, binding = 0) uniform buf0
38# {
39#     uint _GLF_uniform_uint_values[2];
40# };
41# // Contents of _GLF_uniform_int_values: [1, 0]
42# layout(set = 0, binding = 1) uniform buf1
43# {
44#     int _GLF_uniform_int_values[2];
45# };
46# layout(location = 0) out vec4 _GLF_color;
47#
48# void main()
49# {
50#     uint a = _uint_1;
51#
52#     // Always true.
53#     if(uaddCarry(1u, 1u, a) == _uint_2)
54#     {
55#         _GLF_color = vec4(_int_1, float(a), _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: 57
67; Schema: 0
68               OpCapability Shader
69          %1 = OpExtInstImport "GLSL.std.450"
70               OpMemoryModel Logical GLSL450
71               OpEntryPoint Fragment %4 "main" %34
72               OpExecutionMode %4 OriginUpperLeft
73               OpSource ESSL 320
74               OpName %4 "main"
75               OpName %8 "a"
76               OpName %11 "buf0"
77               OpMemberName %11 0 "_GLF_uniform_uint_values"
78               OpName %13 ""
79               OpName %21 "ResType"
80               OpName %34 "_GLF_color"
81               OpName %36 "buf1"
82               OpMemberName %36 0 "_GLF_uniform_int_values"
83               OpName %38 ""
84               OpDecorate %10 ArrayStride 16
85               OpMemberDecorate %11 0 Offset 0
86               OpDecorate %11 Block
87               OpDecorate %13 DescriptorSet 0
88               OpDecorate %13 Binding 0
89               OpDecorate %34 Location 0
90               OpDecorate %35 ArrayStride 16
91               OpMemberDecorate %36 0 Offset 0
92               OpDecorate %36 Block
93               OpDecorate %38 DescriptorSet 0
94               OpDecorate %38 Binding 1
95          %2 = OpTypeVoid
96          %3 = OpTypeFunction %2
97          %6 = OpTypeInt 32 0
98          %7 = OpTypePointer Function %6
99          %9 = OpConstant %6 2
100         %10 = OpTypeArray %6 %9
101         %11 = OpTypeStruct %10
102         %12 = OpTypePointer Uniform %11
103         %13 = OpVariable %12 Uniform
104         %14 = OpTypeInt 32 1
105         %15 = OpConstant %14 0
106         %16 = OpConstant %14 1
107         %17 = OpTypePointer Uniform %6
108         %20 = OpConstant %6 1
109         %21 = OpTypeStruct %6 %6
110         %27 = OpTypeBool
111         %31 = OpTypeFloat 32
112         %32 = OpTypeVector %31 4
113         %33 = OpTypePointer Output %32
114         %34 = OpVariable %33 Output
115         %35 = OpTypeArray %14 %9
116         %36 = OpTypeStruct %35
117         %37 = OpTypePointer Uniform %36
118         %38 = OpVariable %37 Uniform
119         %39 = OpTypePointer Uniform %14
120          %4 = OpFunction %2 None %3
121          %5 = OpLabel
122          %8 = OpVariable %7 Function
123         %18 = OpAccessChain %17 %13 %15 %16
124         %19 = OpLoad %6 %18
125               OpStore %8 %19
126         %22 = OpIAddCarry %21 %20 %20
127         %23 = OpCompositeExtract %6 %22 1
128               OpStore %8 %23
129         %24 = OpCompositeExtract %6 %22 0
130         %25 = OpAccessChain %17 %13 %15 %15
131         %26 = OpLoad %6 %25
132         %28 = OpIEqual %27 %24 %26
133               OpSelectionMerge %30 None
134               OpBranchConditional %28 %29 %52
135         %29 = OpLabel
136         %40 = OpAccessChain %39 %38 %15 %15
137         %41 = OpLoad %14 %40
138         %42 = OpConvertSToF %31 %41
139         %43 = OpLoad %6 %8
140         %44 = OpConvertUToF %31 %43
141         %45 = OpAccessChain %39 %38 %15 %16
142         %46 = OpLoad %14 %45
143         %47 = OpConvertSToF %31 %46
144         %48 = OpAccessChain %39 %38 %15 %15
145         %49 = OpLoad %14 %48
146         %50 = OpConvertSToF %31 %49
147         %51 = OpCompositeConstruct %32 %42 %44 %47 %50
148               OpStore %34 %51
149               OpBranch %30
150         %52 = OpLabel
151         %53 = OpAccessChain %39 %38 %15 %16
152         %54 = OpLoad %14 %53
153         %55 = OpConvertSToF %31 %54
154         %56 = OpCompositeConstruct %32 %55 %55 %55 %55
155               OpStore %34 %56
156               OpBranch %30
157         %30 = OpLabel
158               OpReturn
159               OpFunctionEnd
160END
161
162# uniforms for variant
163
164# _GLF_uniform_int_values
165BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
166 1 0
167END
168# _GLF_uniform_uint_values
169BUFFER variant__GLF_uniform_uint_values DATA_TYPE int32[] STD140 DATA
170 2 1
171END
172
173BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
174
175PIPELINE graphics variant_pipeline
176  ATTACH variant_vertex_shader
177  ATTACH variant_fragment_shader
178  FRAMEBUFFER_SIZE 256 256
179  BIND BUFFER variant_framebuffer AS color LOCATION 0
180  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
181  BIND BUFFER variant__GLF_uniform_uint_values AS uniform DESCRIPTOR_SET 0 BINDING 0
182END
183CLEAR_COLOR variant_pipeline 0 0 0 255
184
185CLEAR variant_pipeline
186RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
187
188EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
189