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 that assigns vector values
21
22# The test passes because shader always writes red.
23
24# Optimized using spirv-opt with the following arguments:
25# '--eliminate-dead-branches'
26# '--eliminate-dead-inserts'
27# '--combine-access-chains'
28# '--eliminate-local-multi-store'
29# '--simplify-instructions'
30# '--eliminate-dead-branches'
31# '--vector-dce'
32# '--combine-access-chains'
33# '--eliminate-local-single-store'
34# '--eliminate-local-multi-store'
35# '--eliminate-dead-inserts'
36# '--if-conversion'
37# '--copy-propagate-arrays'
38# '--combine-access-chains'
39# spirv-opt commit hash: e82a428605f6ce0a07337b36f8ba3935c9f165ac
40
41
42
43SHADER vertex variant_vertex_shader PASSTHROUGH
44
45# variant_fragment_shader is derived from the following GLSL:
46# #version 310 es
47# precision highp float;
48#
49# layout(location = 0) out vec4 _GLF_color;
50#
51# int func()
52# {
53#     vec4 tmp;
54#     float tmp2[1];
55#     float tmp3;
56#     vec2 coord = vec2(1.0);
57#
58#     if (int(coord.y) < 180) // Always true
59#         tmp3 = tmp2[0];
60#     else
61#         discard;
62#
63#     tmp = vec4(tmp3);
64#     return 1;
65# }
66#
67# void main()
68# {
69#     if (func() == 1)
70#         _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
71#     else
72#         _GLF_color = vec4(0.0, 0.0, 0.0, 1.0);
73# }
74SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
75; SPIR-V
76; Version: 1.0
77; Generator: Khronos Glslang Reference Front End; 8
78; Bound: 54
79; Schema: 0
80               OpCapability Shader
81          %1 = OpExtInstImport "GLSL.std.450"
82               OpMemoryModel Logical GLSL450
83               OpEntryPoint Fragment %4 "main" %49
84               OpExecutionMode %4 OriginUpperLeft
85               OpSource ESSL 310
86               OpName %4 "main"
87               OpName %8 "func("
88               OpName %13 "coord"
89               OpName %27 "tmp3"
90               OpName %30 "tmp2"
91               OpName %38 "tmp"
92               OpName %49 "_GLF_color"
93               OpDecorate %8 RelaxedPrecision
94               OpDecorate %44 RelaxedPrecision
95               OpDecorate %49 Location 0
96          %2 = OpTypeVoid
97          %3 = OpTypeFunction %2
98          %6 = OpTypeInt 32 1
99          %7 = OpTypeFunction %6
100         %10 = OpTypeFloat 32
101         %11 = OpTypeVector %10 2
102         %12 = OpTypePointer Function %11
103         %14 = OpConstant %10 1
104         %15 = OpConstantComposite %11 %14 %14
105         %16 = OpTypeInt 32 0
106         %17 = OpConstant %16 1
107         %18 = OpTypePointer Function %10
108         %22 = OpConstant %6 180
109         %23 = OpTypeBool
110         %28 = OpTypeArray %10 %17
111         %29 = OpTypePointer Function %28
112         %31 = OpConstant %6 0
113         %36 = OpTypeVector %10 4
114         %37 = OpTypePointer Function %36
115         %41 = OpConstant %6 1
116         %48 = OpTypePointer Output %36
117         %49 = OpVariable %48 Output
118         %50 = OpConstant %10 0
119         %51 = OpConstantComposite %36 %14 %50 %50 %14
120         %53 = OpConstantComposite %36 %50 %50 %50 %14
121          %4 = OpFunction %2 None %3
122          %5 = OpLabel
123         %44 = OpFunctionCall %6 %8
124         %45 = OpIEqual %23 %44 %41
125               OpSelectionMerge %47 None
126               OpBranchConditional %45 %46 %52
127         %46 = OpLabel
128               OpStore %49 %51
129               OpBranch %47
130         %52 = OpLabel
131               OpStore %49 %53
132               OpBranch %47
133         %47 = OpLabel
134               OpReturn
135               OpFunctionEnd
136          %8 = OpFunction %6 None %7
137          %9 = OpLabel
138         %13 = OpVariable %12 Function
139         %27 = OpVariable %18 Function
140         %30 = OpVariable %29 Function
141         %38 = OpVariable %37 Function
142               OpStore %13 %15
143         %19 = OpAccessChain %18 %13 %17
144         %20 = OpLoad %10 %19
145         %21 = OpConvertFToS %6 %20
146         %24 = OpSLessThan %23 %21 %22
147               OpSelectionMerge %26 None
148               OpBranchConditional %24 %25 %34
149         %25 = OpLabel
150         %32 = OpAccessChain %18 %30 %31
151         %33 = OpLoad %10 %32
152               OpStore %27 %33
153               OpBranch %26
154         %34 = OpLabel
155               OpKill
156         %26 = OpLabel
157         %40 = OpCompositeConstruct %36 %33 %33 %33 %33
158               OpStore %38 %40
159               OpReturnValue %41
160               OpFunctionEnd
161END
162
163
164BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
165
166PIPELINE graphics variant_pipeline
167  ATTACH variant_vertex_shader
168  ATTACH variant_fragment_shader
169  FRAMEBUFFER_SIZE 256 256
170  BIND BUFFER variant_framebuffer AS color LOCATION 0
171END
172CLEAR_COLOR variant_pipeline 0 0 0 255
173
174CLEAR variant_pipeline
175RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
176
177EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
178