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 bug found by GraphicsFuzz.
19
20# Short description: A fragment shader with nested if
21
22# The test passes because main always writes color red.
23# Running code after writing red does not matter.
24
25# Optimized using spirv-opt with the following arguments:
26# '--copy-propagate-arrays'
27# '--if-conversion'
28# '--convert-local-access-chains'
29# '--convert-local-access-chains'
30# '--vector-dce'
31# '--reduce-load-size'
32# '--reduce-load-size'
33# '--eliminate-dead-branches'
34# '--merge-blocks'
35# '--inline-entry-points-exhaustive'
36# '--redundancy-elimination'
37# '--private-to-local'
38# '--eliminate-dead-code-aggressive'
39# '--ccp'
40# '--simplify-instructions'
41# '--eliminate-dead-branches'
42# '--inline-entry-points-exhaustive'
43# '--eliminate-dead-inserts'
44# '--eliminate-dead-branches'
45# spirv-opt commit hash: 6b072126595dd8c2448eb1fda616251c5e6d7079
46
47
48
49SHADER vertex variant_vertex_shader PASSTHROUGH
50
51# variant_fragment_shader is derived from the following GLSL:
52# #version 310 es
53# precision highp float;
54#
55# layout(location = 0) out vec4 _GLF_color;
56#
57# layout(set = 0, binding = 0) uniform buf0
58# {
59#     vec2 injectionSwitch;
60# };
61# void main()
62# {
63#     _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); // Write color red
64#
65#     do
66#     {
67#         if (injectionSwitch.y < 0.0) // Always false
68#         {
69#             bool GLF_live12c5 = false;
70#             if (GLF_live12c5)
71#             {
72#             }
73#             continue;
74#         }
75#         break;
76#     } while (false);
77# }
78SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
79; SPIR-V
80; Version: 1.0
81; Generator: Khronos Glslang Reference Front End; 7
82; Bound: 39
83; Schema: 0
84               OpCapability Shader
85          %1 = OpExtInstImport "GLSL.std.450"
86               OpMemoryModel Logical GLSL450
87               OpEntryPoint Fragment %4 "main" %9
88               OpExecutionMode %4 OriginUpperLeft
89               OpSource ESSL 310
90               OpName %4 "main"
91               OpName %9 "_GLF_color"
92               OpName %18 "buf0"
93               OpMemberName %18 0 "injectionSwitch"
94               OpName %20 ""
95               OpName %33 "GLF_live12c5"
96               OpDecorate %9 Location 0
97               OpMemberDecorate %18 0 Offset 0
98               OpDecorate %18 Block
99               OpDecorate %20 DescriptorSet 0
100               OpDecorate %20 Binding 0
101          %2 = OpTypeVoid
102          %3 = OpTypeFunction %2
103          %6 = OpTypeFloat 32
104          %7 = OpTypeVector %6 4
105          %8 = OpTypePointer Output %7
106          %9 = OpVariable %8 Output
107         %10 = OpConstant %6 1
108         %11 = OpConstant %6 0
109         %12 = OpConstantComposite %7 %10 %11 %11 %10
110         %17 = OpTypeVector %6 2
111         %18 = OpTypeStruct %17
112         %19 = OpTypePointer Uniform %18
113         %20 = OpVariable %19 Uniform
114         %21 = OpTypeInt 32 1
115         %22 = OpConstant %21 0
116         %23 = OpTypeInt 32 0
117         %24 = OpConstant %23 1
118         %25 = OpTypePointer Uniform %6
119         %28 = OpTypeBool
120         %32 = OpTypePointer Function %28
121         %34 = OpConstantFalse %28
122          %4 = OpFunction %2 None %3
123          %5 = OpLabel
124         %33 = OpVariable %32 Function
125               OpStore %9 %12
126               OpBranch %13
127         %13 = OpLabel
128               OpLoopMerge %15 %37 None
129               OpBranch %14
130         %14 = OpLabel
131         %26 = OpAccessChain %25 %20 %22 %24
132         %27 = OpLoad %6 %26
133         %29 = OpFOrdLessThan %28 %27 %11
134               OpSelectionMerge %31 None
135               OpBranchConditional %29 %30 %31
136         %30 = OpLabel
137               OpStore %33 %34
138         %35 = OpLoad %28 %33
139               OpSelectionMerge %38 None
140               OpBranchConditional %35 %36 %37
141         %36 = OpLabel
142               OpBranch %37
143         %38 = OpLabel
144               OpBranch %37
145         %37 = OpLabel
146               OpBranchConditional %34 %13 %15
147         %31 = OpLabel
148               OpBranch %15
149         %15 = OpLabel
150               OpReturn
151               OpFunctionEnd
152END
153
154# uniforms for variant
155
156# injectionSwitch
157BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
158 0.0 1.0
159END
160
161BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
162
163PIPELINE graphics variant_pipeline
164  ATTACH variant_vertex_shader
165  ATTACH variant_fragment_shader
166  FRAMEBUFFER_SIZE 256 256
167  BIND BUFFER variant_framebuffer AS color LOCATION 0
168  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
169END
170CLEAR_COLOR variant_pipeline 0 0 0 255
171
172CLEAR variant_pipeline
173RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
174
175EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
176