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_1 _GLF_uniform_int_values[0]
29# #define _int_0 _GLF_uniform_int_values[1]
30# #define _float_1_0 _GLF_uniform_float_values[0]
31#
32# precision highp float;
33# precision highp int;
34#
35# // Contents of _GLF_uniform_float_values: 1.0
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: [1, 0]
42# layout(set = 0, binding = 1) uniform buf1
43# {
44#     int _GLF_uniform_int_values[2];
45# };
46#
47# // Contents of two: 2.0
48# layout(push_constant) uniform buf_push
49# {
50#     float two;
51# };
52#
53# layout(location = 0) out vec4 _GLF_color;
54#
55# void main()
56# {
57#     // Always true: regardless of the condition a value of one can never become larger by clamping.
58#     if(clamp(1, _float_1_0 > two ? 1 : 0, 1) <= 1)
59#     {
60#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
61#     }
62#     else
63#     {
64#         _GLF_color = vec4(_int_0);
65#     }
66# }
67SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
68; SPIR-V
69; Version: 1.0
70; Generator: Khronos Glslang Reference Front End; 10
71; Bound: 59
72; Schema: 0
73               OpCapability Shader
74          %1 = OpExtInstImport "GLSL.std.450"
75               OpMemoryModel Logical GLSL450
76               OpEntryPoint Fragment %4 "main" %34
77               OpExecutionMode %4 OriginUpperLeft
78               OpSource ESSL 320
79               OpName %4 "main"
80               OpName %12 "buf0"
81               OpMemberName %12 0 "_GLF_uniform_float_values"
82               OpName %14 ""
83               OpName %19 "buf_push"
84               OpMemberName %19 0 "two"
85               OpName %21 ""
86               OpName %34 "_GLF_color"
87               OpName %37 "buf1"
88               OpMemberName %37 0 "_GLF_uniform_int_values"
89               OpName %39 ""
90               OpDecorate %11 ArrayStride 16
91               OpMemberDecorate %12 0 Offset 0
92               OpDecorate %12 Block
93               OpDecorate %14 DescriptorSet 0
94               OpDecorate %14 Binding 0
95               OpMemberDecorate %19 0 Offset 0
96               OpDecorate %19 Block
97               OpDecorate %34 Location 0
98               OpDecorate %36 ArrayStride 16
99               OpMemberDecorate %37 0 Offset 0
100               OpDecorate %37 Block
101               OpDecorate %39 DescriptorSet 0
102               OpDecorate %39 Binding 1
103          %2 = OpTypeVoid
104          %3 = OpTypeFunction %2
105          %6 = OpTypeInt 32 1
106          %7 = OpConstant %6 1
107          %8 = OpTypeFloat 32
108          %9 = OpTypeInt 32 0
109         %10 = OpConstant %9 1
110         %11 = OpTypeArray %8 %10
111         %12 = OpTypeStruct %11
112         %13 = OpTypePointer Uniform %12
113         %14 = OpVariable %13 Uniform
114         %15 = OpConstant %6 0
115         %16 = OpTypePointer Uniform %8
116         %19 = OpTypeStruct %8
117         %20 = OpTypePointer PushConstant %19
118         %21 = OpVariable %20 PushConstant
119         %22 = OpTypePointer PushConstant %8
120         %25 = OpTypeBool
121         %32 = OpTypeVector %8 4
122         %33 = OpTypePointer Output %32
123         %34 = OpVariable %33 Output
124         %35 = OpConstant %9 2
125         %36 = OpTypeArray %6 %35
126         %37 = OpTypeStruct %36
127         %38 = OpTypePointer Uniform %37
128         %39 = OpVariable %38 Uniform
129         %40 = OpTypePointer Uniform %6
130          %4 = OpFunction %2 None %3
131          %5 = OpLabel
132         %17 = OpAccessChain %16 %14 %15 %15
133         %18 = OpLoad %8 %17
134         %23 = OpAccessChain %22 %21 %15
135         %24 = OpLoad %8 %23
136         %26 = OpFOrdGreaterThan %25 %18 %24
137         %27 = OpSelect %6 %26 %7 %15
138         %28 = OpExtInst %6 %1 SClamp %7 %27 %7
139         %29 = OpSLessThanEqual %25 %28 %7
140               OpSelectionMerge %31 None
141               OpBranchConditional %29 %30 %54
142         %30 = OpLabel
143         %41 = OpAccessChain %40 %39 %15 %15
144         %42 = OpLoad %6 %41
145         %43 = OpConvertSToF %8 %42
146         %44 = OpAccessChain %40 %39 %15 %7
147         %45 = OpLoad %6 %44
148         %46 = OpConvertSToF %8 %45
149         %47 = OpAccessChain %40 %39 %15 %7
150         %48 = OpLoad %6 %47
151         %49 = OpConvertSToF %8 %48
152         %50 = OpAccessChain %40 %39 %15 %15
153         %51 = OpLoad %6 %50
154         %52 = OpConvertSToF %8 %51
155         %53 = OpCompositeConstruct %32 %43 %46 %49 %52
156               OpStore %34 %53
157               OpBranch %31
158         %54 = OpLabel
159         %55 = OpAccessChain %40 %39 %15 %7
160         %56 = OpLoad %6 %55
161         %57 = OpConvertSToF %8 %56
162         %58 = OpCompositeConstruct %32 %57 %57 %57 %57
163               OpStore %34 %58
164               OpBranch %31
165         %31 = OpLabel
166               OpReturn
167               OpFunctionEnd
168END
169
170# uniforms for variant
171
172# two
173BUFFER variant_two DATA_TYPE float STD140 DATA
174 2.0
175END
176# _GLF_uniform_int_values
177BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
178 1 0
179END
180# _GLF_uniform_float_values
181BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
182 1.0
183END
184
185BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
186
187PIPELINE graphics variant_pipeline
188  ATTACH variant_vertex_shader
189  ATTACH variant_fragment_shader
190  FRAMEBUFFER_SIZE 32 32
191  BIND BUFFER variant_framebuffer AS color LOCATION 0
192  BIND BUFFER variant_two AS push_constant
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