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 always false if in switch 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# '--private-to-local'
26# '--eliminate-local-multi-store'
27# '--simplify-instructions'
28# '--eliminate-dead-inserts'
29# spirv-opt commit hash: 4a00a80c40484a6f6f72f48c9d34943cf8f180d4
30
31
32
33SHADER vertex variant_vertex_shader PASSTHROUGH
34
35# variant_fragment_shader is derived from the following GLSL:
36# #version 310 es
37#
38# precision highp float;
39#
40# layout(location = 0) out vec4 _GLF_color;
41#
42# void main()
43# {
44#   switch (0)
45#   {
46#   case 0:
47#     if (false)
48#     {
49#     }
50#   }
51#
52#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
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; 7
58; Bound: 22
59; Schema: 0
60               OpCapability Shader
61          %1 = OpExtInstImport "GLSL.std.450"
62               OpMemoryModel Logical GLSL450
63               OpEntryPoint Fragment %4 "main" %18
64               OpExecutionMode %4 OriginUpperLeft
65               OpSource ESSL 310
66               OpName %4 "main"
67               OpName %18 "_GLF_color"
68               OpDecorate %18 Location 0
69          %2 = OpTypeVoid
70          %3 = OpTypeFunction %2
71          %6 = OpTypeInt 32 1
72          %7 = OpConstant %6 0
73         %10 = OpTypeBool
74         %11 = OpConstantFalse %10
75         %15 = OpTypeFloat 32
76         %16 = OpTypeVector %15 4
77         %17 = OpTypePointer Output %16
78         %18 = OpVariable %17 Output
79         %19 = OpConstant %15 1
80         %20 = OpConstant %15 0
81         %21 = OpConstantComposite %16 %19 %20 %20 %19
82          %4 = OpFunction %2 None %3
83          %5 = OpLabel
84               OpSelectionMerge %9 None
85               OpSwitch %7 %9 0 %8
86          %8 = OpLabel
87               OpSelectionMerge %13 None
88               OpBranchConditional %11 %12 %13
89         %12 = OpLabel
90               OpBranch %13
91         %13 = OpLabel
92               OpBranch %9
93          %9 = OpLabel
94               OpStore %18 %21
95               OpReturn
96               OpFunctionEnd
97END
98
99# uniforms for variant
100
101
102BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
103
104PIPELINE graphics variant_pipeline
105  ATTACH variant_vertex_shader
106  ATTACH variant_fragment_shader
107  FRAMEBUFFER_SIZE 256 256
108  BIND BUFFER variant_framebuffer AS color LOCATION 0
109END
110CLEAR_COLOR variant_pipeline 0 0 0 255
111
112CLEAR variant_pipeline
113RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
114
115EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
116