1#!amber
2
3# Copyright 2022 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 the GraphicsFuzz project.
19
20# Short description: A fragment shader that covers specific LLVM code paths
21
22# The test passes because the shader always writes red.
23
24SHADER vertex variant_vertex_shader PASSTHROUGH
25
26# variant_fragment_shader is derived from the following GLSL:
27# #version 320 es
28# #define _float_0_0 _GLF_uniform_float_values[0]
29#
30# precision highp float;
31# precision highp int;
32#
33# // Contents of _GLF_uniform_float_values: 0.0
34# layout(set = 0, binding = 0) uniform buf0
35# {
36#     float _GLF_uniform_float_values[1];
37# };
38#
39# layout(location = 0) out vec4 _GLF_color;
40#
41# void main()
42# {
43#     float f;
44#
45#     // f is uninitialized, but 1.0 is selected from the first vector.
46#     _GLF_color = mix(vec4(1.0), vec4(f, 0.0, 0.0, 1.0), bvec4(gl_FragCoord.y < _float_0_0, true, true, true));
47# }
48SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
49; SPIR-V
50; Version: 1.0
51; Generator: Khronos Glslang Reference Front End; 10
52; Bound: 39
53; Schema: 0
54               OpCapability Shader
55          %1 = OpExtInstImport "GLSL.std.450"
56               OpMemoryModel Logical GLSL450
57               OpEntryPoint Fragment %4 "main" %9 %18
58               OpExecutionMode %4 OriginUpperLeft
59               OpSource ESSL 320
60               OpName %4 "main"
61               OpName %9 "_GLF_color"
62               OpName %13 "f"
63               OpName %18 "gl_FragCoord"
64               OpName %25 "buf0"
65               OpMemberName %25 0 "_GLF_uniform_float_values"
66               OpName %27 ""
67               OpDecorate %9 Location 0
68               OpDecorate %18 BuiltIn FragCoord
69               OpDecorate %24 ArrayStride 16
70               OpMemberDecorate %25 0 Offset 0
71               OpDecorate %25 Block
72               OpDecorate %27 DescriptorSet 0
73               OpDecorate %27 Binding 0
74          %2 = OpTypeVoid
75          %3 = OpTypeFunction %2
76          %6 = OpTypeFloat 32
77          %7 = OpTypeVector %6 4
78          %8 = OpTypePointer Output %7
79          %9 = OpVariable %8 Output
80         %10 = OpConstant %6 1
81         %11 = OpConstantComposite %7 %10 %10 %10 %10
82         %12 = OpTypePointer Function %6
83         %15 = OpConstant %6 0
84         %17 = OpTypePointer Input %7
85         %18 = OpVariable %17 Input
86         %19 = OpTypeInt 32 0
87         %20 = OpConstant %19 1
88         %21 = OpTypePointer Input %6
89         %24 = OpTypeArray %6 %20
90         %25 = OpTypeStruct %24
91         %26 = OpTypePointer Uniform %25
92         %27 = OpVariable %26 Uniform
93         %28 = OpTypeInt 32 1
94         %29 = OpConstant %28 0
95         %30 = OpTypePointer Uniform %6
96         %33 = OpTypeBool
97         %35 = OpConstantTrue %33
98         %36 = OpTypeVector %33 4
99          %4 = OpFunction %2 None %3
100          %5 = OpLabel
101         %13 = OpVariable %12 Function
102         %14 = OpLoad %6 %13
103         %16 = OpCompositeConstruct %7 %14 %15 %15 %10
104         %22 = OpAccessChain %21 %18 %20
105         %23 = OpLoad %6 %22
106         %31 = OpAccessChain %30 %27 %29 %29
107         %32 = OpLoad %6 %31
108         %34 = OpFOrdLessThan %33 %23 %32
109         %37 = OpCompositeConstruct %36 %34 %35 %35 %35
110         %38 = OpSelect %7 %37 %16 %11
111               OpStore %9 %38
112               OpReturn
113               OpFunctionEnd
114END
115
116# uniforms for variant
117
118# _GLF_uniform_float_values
119BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
120 0.0
121END
122
123BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
124
125PIPELINE graphics variant_pipeline
126  ATTACH variant_vertex_shader
127  ATTACH variant_fragment_shader
128  FRAMEBUFFER_SIZE 32 32
129  BIND BUFFER variant_framebuffer AS color LOCATION 0
130  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
131END
132CLEAR_COLOR variant_pipeline 0 0 0 255
133
134CLEAR variant_pipeline
135RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
136
137EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
138