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 simplification path
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# precision highp float;
29#
30# precision highp int;
31#
32# layout(location = 0) out vec4 _GLF_color;
33#
34# layout(set = 0, binding = 0) uniform buf0
35# {
36#   int one;
37# };
38#
39# void main()
40# {
41#   if(max(one, clamp(one, one, 1)) == 1)
42#   {
43#     _GLF_color = vec4(1, 0, 0, 1);
44#   }
45#   else
46#   {
47#     _GLF_color = vec4(1);
48#   }
49# }
50SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
51; SPIR-V
52; Version: 1.0
53; Generator: Khronos Glslang Reference Front End; 8
54; Bound: 34
55; Schema: 0
56               OpCapability Shader
57          %1 = OpExtInstImport "GLSL.std.450"
58               OpMemoryModel Logical GLSL450
59               OpEntryPoint Fragment %4 "main" %28
60               OpExecutionMode %4 OriginUpperLeft
61               OpSource ESSL 310
62               OpName %4 "main"
63               OpName %7 "buf0"
64               OpMemberName %7 0 "one"
65               OpName %9 ""
66               OpName %28 "_GLF_color"
67               OpMemberDecorate %7 0 Offset 0
68               OpDecorate %7 Block
69               OpDecorate %9 DescriptorSet 0
70               OpDecorate %9 Binding 0
71               OpDecorate %28 Location 0
72          %2 = OpTypeVoid
73          %3 = OpTypeFunction %2
74          %6 = OpTypeInt 32 1
75          %7 = OpTypeStruct %6
76          %8 = OpTypePointer Uniform %7
77          %9 = OpVariable %8 Uniform
78         %10 = OpConstant %6 0
79         %11 = OpTypePointer Uniform %6
80         %18 = OpConstant %6 1
81         %21 = OpTypeBool
82         %25 = OpTypeFloat 32
83         %26 = OpTypeVector %25 4
84         %27 = OpTypePointer Output %26
85         %28 = OpVariable %27 Output
86         %29 = OpConstant %25 1
87         %30 = OpConstant %25 0
88         %31 = OpConstantComposite %26 %29 %30 %30 %29
89         %33 = OpConstantComposite %26 %29 %29 %29 %29
90          %4 = OpFunction %2 None %3
91          %5 = OpLabel
92         %12 = OpAccessChain %11 %9 %10
93         %13 = OpLoad %6 %12
94         %14 = OpAccessChain %11 %9 %10
95         %15 = OpLoad %6 %14
96         %16 = OpAccessChain %11 %9 %10
97         %17 = OpLoad %6 %16
98         %19 = OpExtInst %6 %1 SClamp %15 %17 %18
99         %20 = OpExtInst %6 %1 SMax %13 %19
100         %22 = OpIEqual %21 %20 %18
101               OpSelectionMerge %24 None
102               OpBranchConditional %22 %23 %32
103         %23 = OpLabel
104               OpStore %28 %31
105               OpBranch %24
106         %32 = OpLabel
107               OpStore %28 %33
108               OpBranch %24
109         %24 = OpLabel
110               OpReturn
111               OpFunctionEnd
112END
113
114# uniforms for variant
115
116# one
117BUFFER variant_one DATA_TYPE int32 DATA
118 1
119END
120
121BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
122
123PIPELINE graphics variant_pipeline
124  ATTACH variant_vertex_shader
125  ATTACH variant_fragment_shader
126  FRAMEBUFFER_SIZE 256 256
127  BIND BUFFER variant_framebuffer AS color LOCATION 0
128  BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
129END
130CLEAR_COLOR variant_pipeline 0 0 0 255
131
132CLEAR variant_pipeline
133RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
134
135EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
136