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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 the GraphicsFuzz project.
19
20# Short description: A fragment shader that covers specific NIR code paths
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 320 es
28#
29# precision highp int;
30# precision highp float;
31#
32# layout(location = 0) out vec4 _GLF_color;
33#
34# void main()
35# {
36#     float f = 2.0;
37#
38#     // Always true.
39#     if(exp2(f) == 4.0)
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; 10
48; Bound: 25
49; Schema: 0
50               OpCapability Shader
51          %1 = OpExtInstImport "GLSL.std.450"
52               OpMemoryModel Logical GLSL450
53               OpEntryPoint Fragment %4 "main" %19
54               OpExecutionMode %4 OriginUpperLeft
55               OpSource ESSL 320
56               OpName %4 "main"
57               OpName %8 "f"
58               OpName %19 "_GLF_color"
59               OpDecorate %19 Location 0
60          %2 = OpTypeVoid
61          %3 = OpTypeFunction %2
62          %6 = OpTypeFloat 32
63          %7 = OpTypePointer Function %6
64          %9 = OpConstant %6 2
65         %12 = OpConstant %6 4
66         %13 = OpTypeBool
67         %17 = OpTypeVector %6 4
68         %18 = OpTypePointer Output %17
69         %19 = OpVariable %18 Output
70         %20 = OpConstant %6 1
71         %21 = OpConstant %6 0
72         %22 = OpConstantComposite %17 %20 %21 %21 %20
73         %24 = OpConstantComposite %17 %21 %21 %21 %21
74          %4 = OpFunction %2 None %3
75          %5 = OpLabel
76          %8 = OpVariable %7 Function
77               OpStore %8 %9
78         %10 = OpLoad %6 %8
79         %11 = OpExtInst %6 %1 Exp2 %10
80         %14 = OpFOrdEqual %13 %11 %12
81               OpSelectionMerge %16 None
82               OpBranchConditional %14 %15 %23
83         %15 = OpLabel
84               OpStore %19 %22
85               OpBranch %16
86         %23 = OpLabel
87               OpStore %19 %24
88               OpBranch %16
89         %16 = OpLabel
90               OpReturn
91               OpFunctionEnd
92END
93
94
95BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
96
97PIPELINE graphics variant_pipeline
98  ATTACH variant_vertex_shader
99  ATTACH variant_fragment_shader
100  FRAMEBUFFER_SIZE 256 256
101  BIND BUFFER variant_framebuffer AS color LOCATION 0
102END
103CLEAR_COLOR variant_pipeline 0 0 0 255
104
105CLEAR variant_pipeline
106RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
107
108EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
109