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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 GraphicsFuzz.
19
20# Short description: A fragment shader that covers a specific pattern matching 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# int func(int x)
39# {
40#     // Always true.
41#     if (one == 1)
42#         return x;
43#
44#     return one;
45# }
46#
47# void main()
48# {
49#     if(func(-1) <= 0)
50#         _GLF_color = vec4(1, 0, 0, 1);
51#     else
52#         _GLF_color = vec4(0);
53# }
54SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
55; SPIR-V
56; Version: 1.0
57; Generator: Khronos Glslang Reference Front End; 8
58; Bound: 45
59; Schema: 0
60               OpCapability Shader
61          %1 = OpExtInstImport "GLSL.std.450"
62               OpMemoryModel Logical GLSL450
63               OpEntryPoint Fragment %4 "main" %39
64               OpExecutionMode %4 OriginUpperLeft
65               OpSource ESSL 310
66               OpName %4 "main"
67               OpName %10 "func(i1;"
68               OpName %9 "x"
69               OpName %12 "buf0"
70               OpMemberName %12 0 "one"
71               OpName %14 ""
72               OpName %31 "param"
73               OpName %39 "_GLF_color"
74               OpMemberDecorate %12 0 Offset 0
75               OpDecorate %12 Block
76               OpDecorate %14 DescriptorSet 0
77               OpDecorate %14 Binding 0
78               OpDecorate %39 Location 0
79          %2 = OpTypeVoid
80          %3 = OpTypeFunction %2
81          %6 = OpTypeInt 32 1
82          %7 = OpTypePointer Function %6
83          %8 = OpTypeFunction %6 %7
84         %12 = OpTypeStruct %6
85         %13 = OpTypePointer Uniform %12
86         %14 = OpVariable %13 Uniform
87         %15 = OpConstant %6 0
88         %16 = OpTypePointer Uniform %6
89         %19 = OpConstant %6 1
90         %20 = OpTypeBool
91         %30 = OpConstant %6 -1
92         %36 = OpTypeFloat 32
93         %37 = OpTypeVector %36 4
94         %38 = OpTypePointer Output %37
95         %39 = OpVariable %38 Output
96         %40 = OpConstant %36 1
97         %41 = OpConstant %36 0
98         %42 = OpConstantComposite %37 %40 %41 %41 %40
99         %44 = OpConstantComposite %37 %41 %41 %41 %41
100          %4 = OpFunction %2 None %3
101          %5 = OpLabel
102         %31 = OpVariable %7 Function
103               OpStore %31 %30
104         %32 = OpFunctionCall %6 %10 %31
105         %33 = OpSLessThanEqual %20 %32 %15
106               OpSelectionMerge %35 None
107               OpBranchConditional %33 %34 %43
108         %34 = OpLabel
109               OpStore %39 %42
110               OpBranch %35
111         %43 = OpLabel
112               OpStore %39 %44
113               OpBranch %35
114         %35 = OpLabel
115               OpReturn
116               OpFunctionEnd
117         %10 = OpFunction %6 None %8
118          %9 = OpFunctionParameter %7
119         %11 = OpLabel
120         %17 = OpAccessChain %16 %14 %15
121         %18 = OpLoad %6 %17
122         %21 = OpIEqual %20 %18 %19
123               OpSelectionMerge %23 None
124               OpBranchConditional %21 %22 %23
125         %22 = OpLabel
126         %24 = OpLoad %6 %9
127               OpReturnValue %24
128         %23 = OpLabel
129         %26 = OpAccessChain %16 %14 %15
130         %27 = OpLoad %6 %26
131               OpReturnValue %27
132               OpFunctionEnd
133END
134
135# uniforms for variant
136
137# one
138BUFFER variant_one DATA_TYPE int32 DATA
139 1
140END
141
142BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
143
144PIPELINE graphics variant_pipeline
145  ATTACH variant_vertex_shader
146  ATTACH variant_fragment_shader
147  FRAMEBUFFER_SIZE 256 256
148  BIND BUFFER variant_framebuffer AS color LOCATION 0
149  BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
150END
151CLEAR_COLOR variant_pipeline 0 0 0 255
152
153CLEAR variant_pipeline
154RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
155
156EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
157