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