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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 x86 isel lowering code path
21
22# The test passes because the shader always writes red.
23
24# Optimized using spirv-opt with the following arguments:
25# '--eliminate-dead-branches'
26# '--merge-return'
27# '--eliminate-dead-branches'
28# '--merge-blocks'
29# spirv-opt commit hash: a187dd58a0485988841d325a85c8e6063f53500a
30
31
32
33SHADER vertex variant_vertex_shader PASSTHROUGH
34
35# variant_fragment_shader is derived from the following GLSL:
36# #version 310 es
37# #define _float_0_0 _GLF_uniform_float_values[0]
38# #define _float_790_0 _GLF_uniform_float_values[1]
39# #define _float_2_0 _GLF_uniform_float_values[2]
40# #define _float_4_0 _GLF_uniform_float_values[3]
41# #define _float_1_0 _GLF_uniform_float_values[4]
42#
43# precision highp float;
44#
45# // Contents of _GLF_uniform_float_values: [0.0, 790.0, 2.0, 4.0, 1.0]
46# layout(set = 0, binding = 0) uniform buf0
47# {
48#     float _GLF_uniform_float_values[5];
49# };
50#
51# layout(location = 0) out vec4 _GLF_color;
52#
53# void main()
54# {
55#     // a becomes 0.
56#     float a = determinant(mat2(_float_2_0, _float_4_0, _float_1_0, _float_2_0));
57#
58#     //b becomes 0.
59#     float b = float(mat2(a));
60#
61#     // This results in an undefined value, but not in undefined behavior.
62#     // v1.x becomes undefined and v1.y becomes 0.
63#     vec2 v1 = acos(exp(vec2(_float_790_0, b)));
64#
65#     _GLF_color = vec4(v1.x);
66#
67#     if (v1.y == _float_0_0)
68#     {
69#         _GLF_color = vec4(_float_1_0, _float_0_0, _float_0_0, _float_1_0);
70#     }
71# }
72SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
73; SPIR-V
74; Version: 1.0
75; Generator: Khronos Glslang Reference Front End; 10
76; Bound: 77
77; Schema: 0
78               OpCapability Shader
79          %1 = OpExtInstImport "GLSL.std.450"
80               OpMemoryModel Logical GLSL450
81               OpEntryPoint Fragment %4 "main" %54
82               OpExecutionMode %4 OriginUpperLeft
83               OpSource ESSL 310
84               OpName %4 "main"
85               OpName %8 "a"
86               OpName %12 "buf0"
87               OpMemberName %12 0 "_GLF_uniform_float_values"
88               OpName %14 ""
89               OpName %37 "b"
90               OpName %44 "v1"
91               OpName %54 "_GLF_color"
92               OpDecorate %11 ArrayStride 16
93               OpMemberDecorate %12 0 Offset 0
94               OpDecorate %12 Block
95               OpDecorate %14 DescriptorSet 0
96               OpDecorate %14 Binding 0
97               OpDecorate %54 Location 0
98          %2 = OpTypeVoid
99          %3 = OpTypeFunction %2
100          %6 = OpTypeFloat 32
101          %7 = OpTypePointer Function %6
102          %9 = OpTypeInt 32 0
103         %10 = OpConstant %9 5
104         %11 = OpTypeArray %6 %10
105         %12 = OpTypeStruct %11
106         %13 = OpTypePointer Uniform %12
107         %14 = OpVariable %13 Uniform
108         %15 = OpTypeInt 32 1
109         %16 = OpConstant %15 0
110         %17 = OpConstant %15 2
111         %18 = OpTypePointer Uniform %6
112         %21 = OpConstant %15 3
113         %24 = OpConstant %15 4
114         %29 = OpTypeVector %6 2
115         %30 = OpTypeMatrix %29 2
116         %31 = OpConstant %6 1
117         %32 = OpConstant %6 0
118         %43 = OpTypePointer Function %29
119         %45 = OpConstant %15 1
120         %52 = OpTypeVector %6 4
121         %53 = OpTypePointer Output %52
122         %54 = OpVariable %53 Output
123         %55 = OpConstant %9 0
124         %59 = OpConstant %9 1
125         %64 = OpTypeBool
126          %4 = OpFunction %2 None %3
127          %5 = OpLabel
128          %8 = OpVariable %7 Function
129         %37 = OpVariable %7 Function
130         %44 = OpVariable %43 Function
131         %19 = OpAccessChain %18 %14 %16 %17
132         %20 = OpLoad %6 %19
133         %22 = OpAccessChain %18 %14 %16 %21
134         %23 = OpLoad %6 %22
135         %25 = OpAccessChain %18 %14 %16 %24
136         %26 = OpLoad %6 %25
137         %27 = OpAccessChain %18 %14 %16 %17
138         %28 = OpLoad %6 %27
139         %33 = OpCompositeConstruct %29 %20 %23
140         %34 = OpCompositeConstruct %29 %26 %28
141         %35 = OpCompositeConstruct %30 %33 %34
142         %36 = OpExtInst %6 %1 Determinant %35
143               OpStore %8 %36
144         %38 = OpLoad %6 %8
145         %39 = OpCompositeConstruct %29 %38 %32
146         %40 = OpCompositeConstruct %29 %32 %38
147         %41 = OpCompositeConstruct %30 %39 %40
148         %42 = OpCompositeExtract %6 %41 0 0
149               OpStore %37 %42
150         %46 = OpAccessChain %18 %14 %16 %45
151         %47 = OpLoad %6 %46
152         %48 = OpLoad %6 %37
153         %49 = OpCompositeConstruct %29 %47 %48
154         %50 = OpExtInst %29 %1 Exp %49
155         %51 = OpExtInst %29 %1 Acos %50
156               OpStore %44 %51
157         %56 = OpAccessChain %7 %44 %55
158         %57 = OpLoad %6 %56
159         %58 = OpCompositeConstruct %52 %57 %57 %57 %57
160               OpStore %54 %58
161         %60 = OpAccessChain %7 %44 %59
162         %61 = OpLoad %6 %60
163         %62 = OpAccessChain %18 %14 %16 %16
164         %63 = OpLoad %6 %62
165         %65 = OpFOrdEqual %64 %61 %63
166               OpSelectionMerge %67 None
167               OpBranchConditional %65 %66 %67
168         %66 = OpLabel
169         %68 = OpAccessChain %18 %14 %16 %24
170         %69 = OpLoad %6 %68
171         %70 = OpAccessChain %18 %14 %16 %16
172         %71 = OpLoad %6 %70
173         %72 = OpAccessChain %18 %14 %16 %16
174         %73 = OpLoad %6 %72
175         %74 = OpAccessChain %18 %14 %16 %24
176         %75 = OpLoad %6 %74
177         %76 = OpCompositeConstruct %52 %69 %71 %73 %75
178               OpStore %54 %76
179               OpBranch %67
180         %67 = OpLabel
181               OpReturn
182               OpFunctionEnd
183END
184
185# uniforms for variant
186
187# _GLF_uniform_float_values
188BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
189 0.0 790.0 2.0 4.0 1.0
190END
191
192BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
193
194PIPELINE graphics variant_pipeline
195  ATTACH variant_vertex_shader
196  ATTACH variant_fragment_shader
197  FRAMEBUFFER_SIZE 256 256
198  BIND BUFFER variant_framebuffer AS color LOCATION 0
199  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
200END
201CLEAR_COLOR variant_pipeline 0 0 0 255
202
203CLEAR variant_pipeline
204RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
205
206EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
207