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 GraphicsFuzz.
19
20# Short description: A fragment shader that covers a specific instruction folding path.
21
22# The test passes because 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# precision highp float;
29#
30# layout(set = 0, binding = 0) uniform buf0
31# {
32#     float three;
33# };
34# layout(location = 0) out vec4 _GLF_color;
35#
36# void main()
37# {
38#     // Always true.
39#     if(dot(vec4(1.0, 2.0, three, 4.0), vec4(0.0, 1.0, 0.0, 0.0)) == 2.0)
40#         _GLF_color = vec4(1, 0, 0, 1);
41#     else
42#         _GLF_color = vec4(0);
43# }
44SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
45; SPIR-V
46; Version: 1.0
47; Generator: Khronos Glslang Reference Front End; 8
48; Bound: 32
49; Schema: 0
50               OpCapability Shader
51          %1 = OpExtInstImport "GLSL.std.450"
52               OpMemoryModel Logical GLSL450
53               OpEntryPoint Fragment %4 "main" %28
54               OpExecutionMode %4 OriginUpperLeft
55               OpSource ESSL 310
56               OpName %4 "main"
57               OpName %9 "buf0"
58               OpMemberName %9 0 "three"
59               OpName %11 ""
60               OpName %28 "_GLF_color"
61               OpMemberDecorate %9 0 Offset 0
62               OpDecorate %9 Block
63               OpDecorate %11 DescriptorSet 0
64               OpDecorate %11 Binding 0
65               OpDecorate %28 Location 0
66          %2 = OpTypeVoid
67          %3 = OpTypeFunction %2
68          %6 = OpTypeFloat 32
69          %7 = OpConstant %6 1
70          %8 = OpConstant %6 2
71          %9 = OpTypeStruct %6
72         %10 = OpTypePointer Uniform %9
73         %11 = OpVariable %10 Uniform
74         %12 = OpTypeInt 32 1
75         %13 = OpConstant %12 0
76         %14 = OpTypePointer Uniform %6
77         %17 = OpConstant %6 4
78         %18 = OpTypeVector %6 4
79         %20 = OpConstant %6 0
80         %21 = OpConstantComposite %18 %20 %7 %20 %20
81         %23 = OpTypeBool
82         %27 = OpTypePointer Output %18
83         %28 = OpVariable %27 Output
84         %29 = OpConstantComposite %18 %7 %20 %20 %7
85         %31 = OpConstantComposite %18 %20 %20 %20 %20
86          %4 = OpFunction %2 None %3
87          %5 = OpLabel
88         %15 = OpAccessChain %14 %11 %13
89         %16 = OpLoad %6 %15
90         %19 = OpCompositeConstruct %18 %7 %8 %16 %17
91         %22 = OpDot %6 %19 %21
92         %24 = OpFOrdEqual %23 %22 %8
93               OpSelectionMerge %26 None
94               OpBranchConditional %24 %25 %30
95         %25 = OpLabel
96               OpStore %28 %29
97               OpBranch %26
98         %30 = OpLabel
99               OpStore %28 %31
100               OpBranch %26
101         %26 = OpLabel
102               OpReturn
103               OpFunctionEnd
104END
105
106# uniforms for variant
107
108# three
109BUFFER variant_three DATA_TYPE float DATA
110 3.0
111END
112
113BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
114
115PIPELINE graphics variant_pipeline
116  ATTACH variant_vertex_shader
117  ATTACH variant_fragment_shader
118  FRAMEBUFFER_SIZE 256 256
119  BIND BUFFER variant_framebuffer AS color LOCATION 0
120  BIND BUFFER variant_three AS uniform DESCRIPTOR_SET 0 BINDING 0
121END
122CLEAR_COLOR variant_pipeline 0 0 0 255
123
124CLEAR variant_pipeline
125RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
126
127EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
128