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