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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 constant 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# precision highp int;
30#
31# layout(location = 0) out vec4 _GLF_color;
32#
33# void main()
34# {
35#     int i = 0, j = 1;
36#
37#     while(i < clamp(j, 5, 9))
38#     {
39#         i++;
40#         j++;
41#     }
42#
43#     if (i == 9 && j == 10)
44#         _GLF_color = vec4(1, 0, 0, 1);
45#     else
46#         _GLF_color = vec4(0);
47# }
48SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
49; SPIR-V
50; Version: 1.0
51; Generator: Khronos Glslang Reference Front End; 8
52; Bound: 45
53; Schema: 0
54               OpCapability Shader
55          %1 = OpExtInstImport "GLSL.std.450"
56               OpMemoryModel Logical GLSL450
57               OpEntryPoint Fragment %4 "main" %39
58               OpExecutionMode %4 OriginUpperLeft
59               OpSource ESSL 310
60               OpName %4 "main"
61               OpName %8 "i"
62               OpName %10 "j"
63               OpName %39 "_GLF_color"
64               OpDecorate %39 Location 0
65          %2 = OpTypeVoid
66          %3 = OpTypeFunction %2
67          %6 = OpTypeInt 32 1
68          %7 = OpTypePointer Function %6
69          %9 = OpConstant %6 0
70         %11 = OpConstant %6 1
71         %19 = OpConstant %6 5
72         %20 = OpConstant %6 9
73         %22 = OpTypeBool
74         %31 = OpConstant %6 10
75         %36 = OpTypeFloat 32
76         %37 = OpTypeVector %36 4
77         %38 = OpTypePointer Output %37
78         %39 = OpVariable %38 Output
79         %40 = OpConstant %36 1
80         %41 = OpConstant %36 0
81         %42 = OpConstantComposite %37 %40 %41 %41 %40
82         %44 = OpConstantComposite %37 %41 %41 %41 %41
83          %4 = OpFunction %2 None %3
84          %5 = OpLabel
85          %8 = OpVariable %7 Function
86         %10 = OpVariable %7 Function
87               OpStore %8 %9
88               OpStore %10 %11
89               OpBranch %12
90         %12 = OpLabel
91               OpLoopMerge %14 %15 None
92               OpBranch %16
93         %16 = OpLabel
94         %17 = OpLoad %6 %8
95         %18 = OpLoad %6 %10
96         %21 = OpExtInst %6 %1 SClamp %18 %19 %20
97         %23 = OpSLessThan %22 %17 %21
98               OpBranchConditional %23 %13 %14
99         %13 = OpLabel
100         %24 = OpLoad %6 %8
101         %25 = OpIAdd %6 %24 %11
102               OpStore %8 %25
103         %26 = OpLoad %6 %10
104         %27 = OpIAdd %6 %26 %11
105               OpStore %10 %27
106               OpBranch %15
107         %15 = OpLabel
108               OpBranch %12
109         %14 = OpLabel
110         %28 = OpLoad %6 %8
111         %29 = OpIEqual %22 %28 %20
112         %30 = OpLoad %6 %10
113         %32 = OpIEqual %22 %30 %31
114         %33 = OpLogicalAnd %22 %29 %32
115               OpSelectionMerge %35 None
116               OpBranchConditional %33 %34 %43
117         %34 = OpLabel
118               OpStore %39 %42
119               OpBranch %35
120         %43 = OpLabel
121               OpStore %39 %44
122               OpBranch %35
123         %35 = OpLabel
124               OpReturn
125               OpFunctionEnd
126END
127
128
129BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
130
131PIPELINE graphics variant_pipeline
132  ATTACH variant_vertex_shader
133  ATTACH variant_fragment_shader
134  FRAMEBUFFER_SIZE 256 256
135  BIND BUFFER variant_framebuffer AS color LOCATION 0
136END
137CLEAR_COLOR variant_pipeline 0 0 0 255
138
139CLEAR variant_pipeline
140RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
141
142EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
143