1#!amber
2
3# Copyright 2022 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
24# Optimized using spirv-opt with the following arguments:
25# '--eliminate-local-single-store'
26# '--convert-local-access-chains'
27# '--if-conversion'
28# '--eliminate-local-single-block'
29# '--simplify-instructions'
30# '--inline-entry-points-exhaustive'
31# '--private-to-local'
32# '--convert-local-access-chains'
33# '--eliminate-dead-branches'
34# '--merge-return'
35# '--combine-access-chains'
36# '--reduce-load-size'
37# '--reduce-load-size'
38# '--combine-access-chains'
39# '--vector-dce'
40# '--eliminate-dead-branches'
41# '--redundancy-elimination'
42# '--inline-entry-points-exhaustive'
43# '--eliminate-dead-branches'
44# '--merge-blocks'
45# '--eliminate-dead-branches'
46# '--eliminate-local-single-block'
47# '--inline-entry-points-exhaustive'
48# '--if-conversion'
49# spirv-opt commit hash: a0370efd589be33d5d9a85cfde2f85841b3755af
50
51
52
53SHADER vertex variant_vertex_shader PASSTHROUGH
54
55# variant_fragment_shader is derived from the following GLSL:
56# #version 320 es
57# #define _int_3 _GLF_uniform_int_values[0]
58# #define _int_1 _GLF_uniform_int_values[1]
59# #define _int_0 _GLF_uniform_int_values[2]
60#
61# precision highp float;
62# precision highp int;
63#
64# // Contents of _GLF_uniform_int_values: [3, 1, 0]
65# layout(set = 0, binding = 0) uniform buf0 {
66#     int _GLF_uniform_int_values[3];
67# };
68# layout(location = 0) out vec4 _GLF_color;
69#
70# void main()
71# {
72#     // f = (0, 1) * max((1, 1), (2, 3)) = (0, 1) * (2, 3) = 0 * 2 + 1 * 3 = 3
73#     float f = dot(vec2(0, 1), max(vec2(_int_1, 1), vec2(2, 3)));
74#
75#     // Always true.
76#     if(int(f) == _int_3)
77#     {
78#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
79#     }
80#     else
81#     {
82#         _GLF_color = vec4(0);
83#     }
84# }
85SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
86; SPIR-V
87; Version: 1.0
88; Generator: Khronos Glslang Reference Front End; 10
89; Bound: 60
90; Schema: 0
91               OpCapability Shader
92          %1 = OpExtInstImport "GLSL.std.450"
93               OpMemoryModel Logical GLSL450
94               OpEntryPoint Fragment %4 "main" %42
95               OpExecutionMode %4 OriginUpperLeft
96               OpSource ESSL 320
97               OpName %4 "main"
98               OpName %8 "f"
99               OpName %17 "buf0"
100               OpMemberName %17 0 "_GLF_uniform_int_values"
101               OpName %19 ""
102               OpName %42 "_GLF_color"
103               OpDecorate %16 ArrayStride 16
104               OpMemberDecorate %17 0 Offset 0
105               OpDecorate %17 Block
106               OpDecorate %19 DescriptorSet 0
107               OpDecorate %19 Binding 0
108               OpDecorate %42 Location 0
109          %2 = OpTypeVoid
110          %3 = OpTypeFunction %2
111          %6 = OpTypeFloat 32
112          %7 = OpTypePointer Function %6
113          %9 = OpTypeVector %6 2
114         %10 = OpConstant %6 0
115         %11 = OpConstant %6 1
116         %12 = OpConstantComposite %9 %10 %11
117         %13 = OpTypeInt 32 1
118         %14 = OpTypeInt 32 0
119         %15 = OpConstant %14 3
120         %16 = OpTypeArray %13 %15
121         %17 = OpTypeStruct %16
122         %18 = OpTypePointer Uniform %17
123         %19 = OpVariable %18 Uniform
124         %20 = OpConstant %13 0
125         %21 = OpConstant %13 1
126         %22 = OpTypePointer Uniform %13
127         %27 = OpConstant %6 2
128         %28 = OpConstant %6 3
129         %29 = OpConstantComposite %9 %27 %28
130         %36 = OpTypeBool
131         %40 = OpTypeVector %6 4
132         %41 = OpTypePointer Output %40
133         %42 = OpVariable %41 Output
134         %46 = OpConstant %13 2
135         %58 = OpConstantComposite %40 %10 %10 %10 %10
136         %59 = OpUndef %6
137          %4 = OpFunction %2 None %3
138          %5 = OpLabel
139          %8 = OpVariable %7 Function
140         %23 = OpAccessChain %22 %19 %20 %21
141         %24 = OpLoad %13 %23
142         %26 = OpCompositeConstruct %9 %59 %11
143         %30 = OpExtInst %9 %1 FMax %26 %29
144         %31 = OpCompositeExtract %6 %30 1
145               OpStore %8 %31
146         %33 = OpConvertFToS %13 %31
147         %34 = OpAccessChain %22 %19 %20 %20
148         %35 = OpLoad %13 %34
149         %37 = OpIEqual %36 %33 %35
150               OpSelectionMerge %39 None
151               OpBranchConditional %37 %38 %57
152         %38 = OpLabel
153         %45 = OpConvertSToF %6 %24
154         %47 = OpAccessChain %22 %19 %20 %46
155         %48 = OpLoad %13 %47
156         %49 = OpConvertSToF %6 %48
157         %56 = OpCompositeConstruct %40 %45 %49 %49 %45
158               OpStore %42 %56
159               OpBranch %39
160         %57 = OpLabel
161               OpStore %42 %58
162               OpBranch %39
163         %39 = OpLabel
164               OpReturn
165               OpFunctionEnd
166END
167
168# uniforms for variant
169
170# _GLF_uniform_int_values
171BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
172 3 1 0
173END
174
175BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
176
177PIPELINE graphics variant_pipeline
178  ATTACH variant_vertex_shader
179  ATTACH variant_fragment_shader
180  FRAMEBUFFER_SIZE 32 32
181  BIND BUFFER variant_framebuffer AS color LOCATION 0
182  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
183END
184CLEAR_COLOR variant_pipeline 0 0 0 255
185
186CLEAR variant_pipeline
187RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
188
189EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
190