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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 unreachable continue statement
21
22# The test passes because the shader always writes the color red.
23
24# Optimized using spirv-opt with the following arguments:
25# '--eliminate-local-single-store'
26# '--simplify-instructions'
27# '--eliminate-dead-branches'
28# '--merge-blocks'
29# '--combine-access-chains'
30# '--vector-dce'
31# '--eliminate-dead-branches'
32# spirv-opt commit hash: 06407250a169c6a03b3765e86619075af1a8c187
33
34
35
36SHADER vertex variant_vertex_shader PASSTHROUGH
37
38# variant_fragment_shader is derived from the following GLSL:
39# #version 310 es
40# precision highp float;
41#
42# layout(location = 0) out vec4 _GLF_color;
43#
44# layout(set = 0, binding = 0) uniform buf0
45# {
46#     vec2 injectionSwitch;
47# };
48# vec3 computeColor()
49# {
50#     _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
51#
52#     for (
53#         int _injected_loop_counter = 1;
54#         true;
55#         1)
56#     {
57#         if (injectionSwitch.x > 1.0) // Always false
58#         {
59#             if (injectionSwitch.x > 1.0)
60#             {
61#             }
62#             continue;
63#         }
64#         return vec3(1.0);
65#     }
66#     return vec3(1.0);
67# }
68# void main()
69# {
70#     computeColor();
71# }
72SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
73; SPIR-V
74; Version: 1.0
75; Generator: Khronos Glslang Reference Front End; 7
76; Bound: 53
77; Schema: 0
78               OpCapability Shader
79          %1 = OpExtInstImport "GLSL.std.450"
80               OpMemoryModel Logical GLSL450
81               OpEntryPoint Fragment %4 "main" %13
82               OpExecutionMode %4 OriginUpperLeft
83               OpSource ESSL 310
84               OpName %4 "main"
85               OpName %9 "computeColor("
86               OpName %13 "_GLF_color"
87               OpName %19 "_injected_loop_counter"
88               OpName %29 "buf0"
89               OpMemberName %29 0 "injectionSwitch"
90               OpName %31 ""
91               OpDecorate %13 Location 0
92               OpDecorate %19 RelaxedPrecision
93               OpMemberDecorate %29 0 Offset 0
94               OpDecorate %29 Block
95               OpDecorate %31 DescriptorSet 0
96               OpDecorate %31 Binding 0
97          %2 = OpTypeVoid
98          %3 = OpTypeFunction %2
99          %6 = OpTypeFloat 32
100          %7 = OpTypeVector %6 3
101          %8 = OpTypeFunction %7
102         %11 = OpTypeVector %6 4
103         %12 = OpTypePointer Output %11
104         %13 = OpVariable %12 Output
105         %14 = OpConstant %6 1
106         %15 = OpConstant %6 0
107         %16 = OpConstantComposite %11 %14 %15 %15 %14
108         %17 = OpTypeInt 32 1
109         %18 = OpTypePointer Function %17
110         %20 = OpConstant %17 1
111         %26 = OpTypeBool
112         %27 = OpConstantTrue %26
113         %28 = OpTypeVector %6 2
114         %29 = OpTypeStruct %28
115         %30 = OpTypePointer Uniform %29
116         %31 = OpVariable %30 Uniform
117         %32 = OpConstant %17 0
118         %33 = OpTypeInt 32 0
119         %34 = OpConstant %33 0
120         %35 = OpTypePointer Uniform %6
121         %47 = OpConstantComposite %7 %14 %14 %14
122          %4 = OpFunction %2 None %3
123          %5 = OpLabel
124         %51 = OpFunctionCall %7 %9
125               OpReturn
126               OpFunctionEnd
127          %9 = OpFunction %7 None %8
128         %10 = OpLabel
129         %19 = OpVariable %18 Function
130               OpStore %13 %16
131               OpStore %19 %20
132               OpBranch %21
133         %21 = OpLabel
134               OpLoopMerge %23 %45 None
135               OpBranch %22
136         %22 = OpLabel
137         %36 = OpAccessChain %35 %31 %32 %34
138         %37 = OpLoad %6 %36
139         %38 = OpFOrdGreaterThan %26 %37 %14
140               OpSelectionMerge %40 None
141               OpBranchConditional %38 %39 %40
142         %39 = OpLabel
143         %41 = OpAccessChain %35 %31 %32 %34
144         %42 = OpLoad %6 %41
145         %43 = OpFOrdGreaterThan %26 %42 %14
146               OpSelectionMerge %52 None
147               OpBranchConditional %43 %44 %45
148         %44 = OpLabel
149               OpBranch %45
150         %52 = OpLabel
151               OpBranch %45
152         %45 = OpLabel
153               OpBranch %21
154         %40 = OpLabel
155               OpReturnValue %47
156         %23 = OpLabel
157               OpUnreachable
158               OpFunctionEnd
159END
160
161# uniforms for variant
162
163# injectionSwitch
164BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
165 0.0 1.0
166END
167
168BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
169
170PIPELINE graphics variant_pipeline
171  ATTACH variant_vertex_shader
172  ATTACH variant_fragment_shader
173  FRAMEBUFFER_SIZE 256 256
174  BIND BUFFER variant_framebuffer AS color LOCATION 0
175  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
176END
177CLEAR_COLOR variant_pipeline 0 0 0 255
178
179CLEAR variant_pipeline
180RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
181
182EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
183