• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 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# int func()
39# {
40#     int ret = 0;
41#
42#     for(int i = 3; i > (i & 1); i -= one)
43#         ret++;
44#
45#     return ret;
46# }
47#
48# void main()
49# {
50#     if (func() == 2)
51#         _GLF_color = vec4(1, 0, 0, 1);
52#     else
53#         _GLF_color = vec4(0);
54# }
55SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
56; SPIR-V
57; Version: 1.0
58; Generator: Khronos Glslang Reference Front End; 8
59; Bound: 53
60; Schema: 0
61               OpCapability Shader
62          %1 = OpExtInstImport "GLSL.std.450"
63               OpMemoryModel Logical GLSL450
64               OpEntryPoint Fragment %4 "main" %47
65               OpExecutionMode %4 OriginUpperLeft
66               OpSource ESSL 310
67               OpName %4 "main"
68               OpName %8 "func("
69               OpName %11 "ret"
70               OpName %13 "i"
71               OpName %28 "buf0"
72               OpMemberName %28 0 "one"
73               OpName %30 ""
74               OpName %47 "_GLF_color"
75               OpMemberDecorate %28 0 Offset 0
76               OpDecorate %28 Block
77               OpDecorate %30 DescriptorSet 0
78               OpDecorate %30 Binding 0
79               OpDecorate %47 Location 0
80          %2 = OpTypeVoid
81          %3 = OpTypeFunction %2
82          %6 = OpTypeInt 32 1
83          %7 = OpTypeFunction %6
84         %10 = OpTypePointer Function %6
85         %12 = OpConstant %6 0
86         %14 = OpConstant %6 3
87         %22 = OpConstant %6 1
88         %24 = OpTypeBool
89         %28 = OpTypeStruct %6
90         %29 = OpTypePointer Uniform %28
91         %30 = OpVariable %29 Uniform
92         %31 = OpTypePointer Uniform %6
93         %40 = OpConstant %6 2
94         %44 = OpTypeFloat 32
95         %45 = OpTypeVector %44 4
96         %46 = OpTypePointer Output %45
97         %47 = OpVariable %46 Output
98         %48 = OpConstant %44 1
99         %49 = OpConstant %44 0
100         %50 = OpConstantComposite %45 %48 %49 %49 %48
101         %52 = OpConstantComposite %45 %49 %49 %49 %49
102          %4 = OpFunction %2 None %3
103          %5 = OpLabel
104         %39 = OpFunctionCall %6 %8
105         %41 = OpIEqual %24 %39 %40
106               OpSelectionMerge %43 None
107               OpBranchConditional %41 %42 %51
108         %42 = OpLabel
109               OpStore %47 %50
110               OpBranch %43
111         %51 = OpLabel
112               OpStore %47 %52
113               OpBranch %43
114         %43 = OpLabel
115               OpReturn
116               OpFunctionEnd
117          %8 = OpFunction %6 None %7
118          %9 = OpLabel
119         %11 = OpVariable %10 Function
120         %13 = OpVariable %10 Function
121               OpStore %11 %12
122               OpStore %13 %14
123               OpBranch %15
124         %15 = OpLabel
125               OpLoopMerge %17 %18 None
126               OpBranch %19
127         %19 = OpLabel
128         %20 = OpLoad %6 %13
129         %21 = OpLoad %6 %13
130         %23 = OpBitwiseAnd %6 %21 %22
131         %25 = OpSGreaterThan %24 %20 %23
132               OpBranchConditional %25 %16 %17
133         %16 = OpLabel
134         %26 = OpLoad %6 %11
135         %27 = OpIAdd %6 %26 %22
136               OpStore %11 %27
137               OpBranch %18
138         %18 = OpLabel
139         %32 = OpAccessChain %31 %30 %12
140         %33 = OpLoad %6 %32
141         %34 = OpLoad %6 %13
142         %35 = OpISub %6 %34 %33
143               OpStore %13 %35
144               OpBranch %15
145         %17 = OpLabel
146         %36 = OpLoad %6 %11
147               OpReturnValue %36
148               OpFunctionEnd
149END
150
151# uniforms for variant
152
153# one
154BUFFER variant_one DATA_TYPE int32 DATA
155 1
156END
157
158BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
159
160PIPELINE graphics variant_pipeline
161  ATTACH variant_vertex_shader
162  ATTACH variant_fragment_shader
163  FRAMEBUFFER_SIZE 256 256
164  BIND BUFFER variant_framebuffer AS color LOCATION 0
165  BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
166END
167CLEAR_COLOR variant_pipeline 0 0 0 255
168
169CLEAR variant_pipeline
170RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
171
172EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
173