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1#!amber
2
3# Copyright 2019 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 const folding rule 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(location = 0) out vec4 _GLF_color;
31#
32# void main()
33# {
34#     // If condition is always false.
35#     if (
36#         clamp(
37#             vec4(3000.0, 1.0, 8.0, 4.0),
38#             vec4(2.0, 3.0, determinant(mat2(2.0, 0.0, 0.0, 2.0)), 5.0), // min = (2, 3, 4, 5)
39#             vec4(6.0)                                                   // max = (6, 6, 6, 6)
40#             ) != vec4(6, 3, 6, 5)
41#        )
42#         _GLF_color = vec4(0);
43#     else
44#         _GLF_color = vec4(1, 0, 0, 1);
45# }
46SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
47; SPIR-V
48; Version: 1.0
49; Generator: Khronos Glslang Reference Front End; 8
50; Bound: 39
51; Schema: 0
52               OpCapability Shader
53          %1 = OpExtInstImport "GLSL.std.450"
54               OpMemoryModel Logical GLSL450
55               OpEntryPoint Fragment %4 "main" %35
56               OpExecutionMode %4 OriginUpperLeft
57               OpSource ESSL 310
58               OpName %4 "main"
59               OpName %35 "_GLF_color"
60               OpDecorate %35 Location 0
61          %2 = OpTypeVoid
62          %3 = OpTypeFunction %2
63          %6 = OpTypeFloat 32
64          %7 = OpTypeVector %6 4
65          %8 = OpConstant %6 3000
66          %9 = OpConstant %6 1
67         %10 = OpConstant %6 8
68         %11 = OpConstant %6 4
69         %12 = OpConstantComposite %7 %8 %9 %10 %11
70         %13 = OpConstant %6 2
71         %14 = OpConstant %6 3
72         %15 = OpTypeVector %6 2
73         %16 = OpTypeMatrix %15 2
74         %17 = OpConstant %6 0
75         %18 = OpConstantComposite %15 %13 %17
76         %19 = OpConstantComposite %15 %17 %13
77         %20 = OpConstantComposite %16 %18 %19
78         %22 = OpConstant %6 5
79         %24 = OpConstant %6 6
80         %25 = OpConstantComposite %7 %24 %24 %24 %24
81         %27 = OpConstantComposite %7 %24 %14 %24 %22
82         %28 = OpTypeBool
83         %29 = OpTypeVector %28 4
84         %34 = OpTypePointer Output %7
85         %35 = OpVariable %34 Output
86         %36 = OpConstantComposite %7 %17 %17 %17 %17
87         %38 = OpConstantComposite %7 %9 %17 %17 %9
88          %4 = OpFunction %2 None %3
89          %5 = OpLabel
90         %21 = OpExtInst %6 %1 Determinant %20
91         %23 = OpCompositeConstruct %7 %13 %14 %21 %22
92         %26 = OpExtInst %7 %1 FClamp %12 %23 %25
93         %30 = OpFOrdNotEqual %29 %26 %27
94         %31 = OpAny %28 %30
95               OpSelectionMerge %33 None
96               OpBranchConditional %31 %32 %37
97         %32 = OpLabel
98               OpStore %35 %36
99               OpBranch %33
100         %37 = OpLabel
101               OpStore %35 %38
102               OpBranch %33
103         %33 = OpLabel
104               OpReturn
105               OpFunctionEnd
106END
107
108
109BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
110
111PIPELINE graphics variant_pipeline
112  ATTACH variant_vertex_shader
113  ATTACH variant_fragment_shader
114  FRAMEBUFFER_SIZE 256 256
115  BIND BUFFER variant_framebuffer AS color LOCATION 0
116END
117CLEAR_COLOR variant_pipeline 0 0 0 255
118
119CLEAR variant_pipeline
120RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
121
122EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
123