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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 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(vec2(2.0, three), vec2(0.0, 2.0)) == 6.0)
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: 33
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 %8 "buf0"
58               OpMemberName %8 0 "three"
59               OpName %10 ""
60               OpName %28 "_GLF_color"
61               OpMemberDecorate %8 0 Offset 0
62               OpDecorate %8 Block
63               OpDecorate %10 DescriptorSet 0
64               OpDecorate %10 Binding 0
65               OpDecorate %28 Location 0
66          %2 = OpTypeVoid
67          %3 = OpTypeFunction %2
68          %6 = OpTypeFloat 32
69          %7 = OpConstant %6 2
70          %8 = OpTypeStruct %6
71          %9 = OpTypePointer Uniform %8
72         %10 = OpVariable %9 Uniform
73         %11 = OpTypeInt 32 1
74         %12 = OpConstant %11 0
75         %13 = OpTypePointer Uniform %6
76         %16 = OpTypeVector %6 2
77         %18 = OpConstant %6 0
78         %19 = OpConstantComposite %16 %18 %7
79         %21 = OpConstant %6 6
80         %22 = OpTypeBool
81         %26 = OpTypeVector %6 4
82         %27 = OpTypePointer Output %26
83         %28 = OpVariable %27 Output
84         %29 = OpConstant %6 1
85         %30 = OpConstantComposite %26 %29 %18 %18 %29
86         %32 = OpConstantComposite %26 %18 %18 %18 %18
87          %4 = OpFunction %2 None %3
88          %5 = OpLabel
89         %14 = OpAccessChain %13 %10 %12
90         %15 = OpLoad %6 %14
91         %17 = OpCompositeConstruct %16 %7 %15
92         %20 = OpDot %6 %17 %19
93         %23 = OpFOrdEqual %22 %20 %21
94               OpSelectionMerge %25 None
95               OpBranchConditional %23 %24 %31
96         %24 = OpLabel
97               OpStore %28 %30
98               OpBranch %25
99         %31 = OpLabel
100               OpStore %28 %32
101               OpBranch %25
102         %25 = OpLabel
103               OpReturn
104               OpFunctionEnd
105END
106
107# uniforms for variant
108
109# three
110BUFFER variant_three DATA_TYPE float DATA
111 3.0
112END
113
114BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
115
116PIPELINE graphics variant_pipeline
117  ATTACH variant_vertex_shader
118  ATTACH variant_fragment_shader
119  FRAMEBUFFER_SIZE 256 256
120  BIND BUFFER variant_framebuffer AS color LOCATION 0
121  BIND BUFFER variant_three AS uniform DESCRIPTOR_SET 0 BINDING 0
122END
123CLEAR_COLOR variant_pipeline 0 0 0 255
124
125CLEAR variant_pipeline
126RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
127
128EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
129