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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 specific constant fold and selection dag 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 310 es
28# #define _float_1_0 _GLF_uniform_float_values[0]
29# #define _float_0_0 _GLF_uniform_float_values[1]
30#
31# precision highp float;
32#
33# // Contents of _GLF_uniform_float_values: [1.0, 0.0]
34# layout(set = 0, binding = 0) uniform buf0
35# {
36#     float _GLF_uniform_float_values[2];
37# };
38#
39# layout(location = 0) out vec4 _GLF_color;
40#
41# void main()
42# {
43#     float a = -1.0;
44#     float b = 1.7;
45#
46#     // c becomes undefined since a < 0. This results in an undefined value, but not in undefined behavior.
47#     float c = pow(a, b);
48#
49#     _GLF_color = vec4(c);
50#
51#     if (a == -1.0 && b == 1.7)
52#     {
53#         _GLF_color = vec4(_float_1_0, _float_0_0, _float_0_0, _float_1_0);
54#     }
55#     else
56#     {
57#         _GLF_color = vec4(_float_1_0);
58#     }
59# }
60SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
61; SPIR-V
62; Version: 1.0
63; Generator: Khronos Glslang Reference Front End; 10
64; Bound: 52
65; Schema: 0
66               OpCapability Shader
67          %1 = OpExtInstImport "GLSL.std.450"
68               OpMemoryModel Logical GLSL450
69               OpEntryPoint Fragment %4 "main" %18
70               OpExecutionMode %4 OriginUpperLeft
71               OpSource ESSL 310
72               OpName %4 "main"
73               OpName %8 "a"
74               OpName %10 "b"
75               OpName %12 "c"
76               OpName %18 "_GLF_color"
77               OpName %32 "buf0"
78               OpMemberName %32 0 "_GLF_uniform_float_values"
79               OpName %34 ""
80               OpDecorate %18 Location 0
81               OpDecorate %31 ArrayStride 16
82               OpMemberDecorate %32 0 Offset 0
83               OpDecorate %32 Block
84               OpDecorate %34 DescriptorSet 0
85               OpDecorate %34 Binding 0
86          %2 = OpTypeVoid
87          %3 = OpTypeFunction %2
88          %6 = OpTypeFloat 32
89          %7 = OpTypePointer Function %6
90          %9 = OpConstant %6 -1
91         %11 = OpConstant %6 1.70000005
92         %16 = OpTypeVector %6 4
93         %17 = OpTypePointer Output %16
94         %18 = OpVariable %17 Output
95         %22 = OpTypeBool
96         %29 = OpTypeInt 32 0
97         %30 = OpConstant %29 2
98         %31 = OpTypeArray %6 %30
99         %32 = OpTypeStruct %31
100         %33 = OpTypePointer Uniform %32
101         %34 = OpVariable %33 Uniform
102         %35 = OpTypeInt 32 1
103         %36 = OpConstant %35 0
104         %37 = OpTypePointer Uniform %6
105         %40 = OpConstant %35 1
106          %4 = OpFunction %2 None %3
107          %5 = OpLabel
108          %8 = OpVariable %7 Function
109         %10 = OpVariable %7 Function
110         %12 = OpVariable %7 Function
111               OpStore %8 %9
112               OpStore %10 %11
113         %13 = OpLoad %6 %8
114         %14 = OpLoad %6 %10
115         %15 = OpExtInst %6 %1 Pow %13 %14
116               OpStore %12 %15
117         %19 = OpLoad %6 %12
118         %20 = OpCompositeConstruct %16 %19 %19 %19 %19
119               OpStore %18 %20
120         %21 = OpLoad %6 %8
121         %23 = OpFOrdEqual %22 %21 %9
122         %24 = OpLoad %6 %10
123         %25 = OpFOrdEqual %22 %24 %11
124         %26 = OpLogicalAnd %22 %23 %25
125               OpSelectionMerge %28 None
126               OpBranchConditional %26 %27 %48
127         %27 = OpLabel
128         %38 = OpAccessChain %37 %34 %36 %36
129         %39 = OpLoad %6 %38
130         %41 = OpAccessChain %37 %34 %36 %40
131         %42 = OpLoad %6 %41
132         %43 = OpAccessChain %37 %34 %36 %40
133         %44 = OpLoad %6 %43
134         %45 = OpAccessChain %37 %34 %36 %36
135         %46 = OpLoad %6 %45
136         %47 = OpCompositeConstruct %16 %39 %42 %44 %46
137               OpStore %18 %47
138               OpBranch %28
139         %48 = OpLabel
140         %49 = OpAccessChain %37 %34 %36 %36
141         %50 = OpLoad %6 %49
142         %51 = OpCompositeConstruct %16 %50 %50 %50 %50
143               OpStore %18 %51
144               OpBranch %28
145         %28 = OpLabel
146               OpReturn
147               OpFunctionEnd
148END
149
150# uniforms for variant
151
152# _GLF_uniform_float_values
153BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
154 1.0 0.0
155END
156
157BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
158
159PIPELINE graphics variant_pipeline
160  ATTACH variant_vertex_shader
161  ATTACH variant_fragment_shader
162  FRAMEBUFFER_SIZE 256 256
163  BIND BUFFER variant_framebuffer AS color LOCATION 0
164  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
165END
166CLEAR_COLOR variant_pipeline 0 0 0 255
167
168CLEAR variant_pipeline
169RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
170
171EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
172