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 _int_0 _GLF_uniform_int_values[0]
29# #define _int_1 _GLF_uniform_int_values[1]
30# #define _float_0_0 _GLF_uniform_float_values[0]
31#
32# precision highp float;
33# precision highp int;
34#
35# // Contents of _GLF_uniform_float_values: 0.0
36# layout(set = 0, binding = 0) uniform buf0
37# {
38#     float _GLF_uniform_float_values[1];
39# };
40#
41# // Contents of _GLF_uniform_int_values: [0, 1]
42# layout(set = 0, binding = 1) uniform buf1
43# {
44#     int _GLF_uniform_int_values[2];
45# };
46#
47# layout(location = 0) out vec4 _GLF_color;
48#
49# float func()
50# {
51#     // 1u unpacked as a half float is a number very close to zero.
52#     // Rounding it makes it exactly zero.
53#     return round(unpackHalf2x16(1u)).x;
54# }
55#
56# void main()
57# {
58#     // Always true.
59#     if(func() == _float_0_0)
60#     {
61#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
62#     }
63#     else
64#     {
65#         _GLF_color = vec4(_int_0);
66#     }
67# }
68SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
69; SPIR-V
70; Version: 1.0
71; Generator: Khronos Glslang Reference Front End; 10
72; Bound: 64
73; Schema: 0
74               OpCapability Shader
75          %1 = OpExtInstImport "GLSL.std.450"
76               OpMemoryModel Logical GLSL450
77               OpEntryPoint Fragment %4 "main" %38
78               OpExecutionMode %4 OriginUpperLeft
79               OpSource ESSL 320
80               OpName %4 "main"
81               OpName %8 "func("
82               OpName %24 "buf0"
83               OpMemberName %24 0 "_GLF_uniform_float_values"
84               OpName %26 ""
85               OpName %38 "_GLF_color"
86               OpName %41 "buf1"
87               OpMemberName %41 0 "_GLF_uniform_int_values"
88               OpName %43 ""
89               OpDecorate %14 RelaxedPrecision
90               OpDecorate %16 RelaxedPrecision
91               OpDecorate %23 ArrayStride 16
92               OpMemberDecorate %24 0 Offset 0
93               OpDecorate %24 Block
94               OpDecorate %26 DescriptorSet 0
95               OpDecorate %26 Binding 0
96               OpDecorate %38 Location 0
97               OpDecorate %40 ArrayStride 16
98               OpMemberDecorate %41 0 Offset 0
99               OpDecorate %41 Block
100               OpDecorate %43 DescriptorSet 0
101               OpDecorate %43 Binding 1
102          %2 = OpTypeVoid
103          %3 = OpTypeFunction %2
104          %6 = OpTypeFloat 32
105          %7 = OpTypeFunction %6
106         %10 = OpTypeInt 32 0
107         %11 = OpConstant %10 1
108         %12 = OpTypeVector %6 2
109         %15 = OpConstant %10 0
110         %17 = OpTypePointer Function %6
111         %23 = OpTypeArray %6 %11
112         %24 = OpTypeStruct %23
113         %25 = OpTypePointer Uniform %24
114         %26 = OpVariable %25 Uniform
115         %27 = OpTypeInt 32 1
116         %28 = OpConstant %27 0
117         %29 = OpTypePointer Uniform %6
118         %32 = OpTypeBool
119         %36 = OpTypeVector %6 4
120         %37 = OpTypePointer Output %36
121         %38 = OpVariable %37 Output
122         %39 = OpConstant %10 2
123         %40 = OpTypeArray %27 %39
124         %41 = OpTypeStruct %40
125         %42 = OpTypePointer Uniform %41
126         %43 = OpVariable %42 Uniform
127         %44 = OpConstant %27 1
128         %45 = OpTypePointer Uniform %27
129          %4 = OpFunction %2 None %3
130          %5 = OpLabel
131         %22 = OpFunctionCall %6 %8
132         %30 = OpAccessChain %29 %26 %28 %28
133         %31 = OpLoad %6 %30
134         %33 = OpFOrdEqual %32 %22 %31
135               OpSelectionMerge %35 None
136               OpBranchConditional %33 %34 %59
137         %34 = OpLabel
138         %46 = OpAccessChain %45 %43 %28 %44
139         %47 = OpLoad %27 %46
140         %48 = OpConvertSToF %6 %47
141         %49 = OpAccessChain %45 %43 %28 %28
142         %50 = OpLoad %27 %49
143         %51 = OpConvertSToF %6 %50
144         %52 = OpAccessChain %45 %43 %28 %28
145         %53 = OpLoad %27 %52
146         %54 = OpConvertSToF %6 %53
147         %55 = OpAccessChain %45 %43 %28 %44
148         %56 = OpLoad %27 %55
149         %57 = OpConvertSToF %6 %56
150         %58 = OpCompositeConstruct %36 %48 %51 %54 %57
151               OpStore %38 %58
152               OpBranch %35
153         %59 = OpLabel
154         %60 = OpAccessChain %45 %43 %28 %28
155         %61 = OpLoad %27 %60
156         %62 = OpConvertSToF %6 %61
157         %63 = OpCompositeConstruct %36 %62 %62 %62 %62
158               OpStore %38 %63
159               OpBranch %35
160         %35 = OpLabel
161               OpReturn
162               OpFunctionEnd
163          %8 = OpFunction %6 None %7
164          %9 = OpLabel
165         %18 = OpVariable %17 Function
166         %13 = OpExtInst %12 %1 UnpackHalf2x16 %11
167         %14 = OpExtInst %12 %1 Round %13
168         %16 = OpCompositeExtract %6 %14 0
169               OpStore %18 %16
170         %19 = OpLoad %6 %18
171               OpReturnValue %19
172               OpFunctionEnd
173END
174
175# uniforms for variant
176
177# _GLF_uniform_int_values
178BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
179 0 1
180END
181# _GLF_uniform_float_values
182BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
183 0.0
184END
185
186BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
187
188PIPELINE graphics variant_pipeline
189  ATTACH variant_vertex_shader
190  ATTACH variant_fragment_shader
191  FRAMEBUFFER_SIZE 32 32
192  BIND BUFFER variant_framebuffer AS color LOCATION 0
193  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
194  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
195END
196CLEAR_COLOR variant_pipeline 0 0 0 255
197
198CLEAR variant_pipeline
199RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 32 32
200
201EXPECT variant_framebuffer IDX 0 0 SIZE 32 32 EQ_RGBA 255 0 0 255
202