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#
30# layout(set = 0, binding = 0) uniform buf0
31# {
32#     int four;
33# };
34# layout(location = 0) out vec4 _GLF_color;
35#
36# void main()
37# {
38#     // If condition is always true.
39#     if(-(four / 2) == -2)
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; 8
48; Bound: 31
49; Schema: 0
50               OpCapability Shader
51          %1 = OpExtInstImport "GLSL.std.450"
52               OpMemoryModel Logical GLSL450
53               OpEntryPoint Fragment %4 "main" %25
54               OpExecutionMode %4 OriginUpperLeft
55               OpSource ESSL 310
56               OpName %4 "main"
57               OpName %7 "buf0"
58               OpMemberName %7 0 "four"
59               OpName %9 ""
60               OpName %25 "_GLF_color"
61               OpMemberDecorate %7 0 RelaxedPrecision
62               OpMemberDecorate %7 0 Offset 0
63               OpDecorate %7 Block
64               OpDecorate %9 DescriptorSet 0
65               OpDecorate %9 Binding 0
66               OpDecorate %13 RelaxedPrecision
67               OpDecorate %15 RelaxedPrecision
68               OpDecorate %16 RelaxedPrecision
69               OpDecorate %25 Location 0
70          %2 = OpTypeVoid
71          %3 = OpTypeFunction %2
72          %6 = OpTypeInt 32 1
73          %7 = OpTypeStruct %6
74          %8 = OpTypePointer Uniform %7
75          %9 = OpVariable %8 Uniform
76         %10 = OpConstant %6 0
77         %11 = OpTypePointer Uniform %6
78         %14 = OpConstant %6 2
79         %17 = OpConstant %6 -2
80         %18 = OpTypeBool
81         %22 = OpTypeFloat 32
82         %23 = OpTypeVector %22 4
83         %24 = OpTypePointer Output %23
84         %25 = OpVariable %24 Output
85         %26 = OpConstant %22 1
86         %27 = OpConstant %22 0
87         %28 = OpConstantComposite %23 %26 %27 %27 %26
88         %30 = OpConstantComposite %23 %27 %27 %27 %27
89          %4 = OpFunction %2 None %3
90          %5 = OpLabel
91         %12 = OpAccessChain %11 %9 %10
92         %13 = OpLoad %6 %12
93         %15 = OpSDiv %6 %13 %14
94         %16 = OpSNegate %6 %15
95         %19 = OpIEqual %18 %16 %17
96               OpSelectionMerge %21 None
97               OpBranchConditional %19 %20 %29
98         %20 = OpLabel
99               OpStore %25 %28
100               OpBranch %21
101         %29 = OpLabel
102               OpStore %25 %30
103               OpBranch %21
104         %21 = OpLabel
105               OpReturn
106               OpFunctionEnd
107END
108
109# uniforms for variant
110
111# four
112BUFFER variant_four DATA_TYPE int32 DATA
113 4
114END
115
116BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
117
118PIPELINE graphics variant_pipeline
119  ATTACH variant_vertex_shader
120  ATTACH variant_fragment_shader
121  FRAMEBUFFER_SIZE 256 256
122  BIND BUFFER variant_framebuffer AS color LOCATION 0
123  BIND BUFFER variant_four AS uniform DESCRIPTOR_SET 0 BINDING 0
124END
125CLEAR_COLOR variant_pipeline 0 0 0 255
126
127CLEAR variant_pipeline
128RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
129
130EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
131