1#!amber
2
3# Copyright 2021 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#
31# precision highp float;
32# precision highp int;
33#
34# // Contents of _GLF_uniform_int_values: [1, 0]
35# layout(set = 0, binding = 0) uniform buf0
36# {
37#     int _GLF_uniform_int_values[2];
38# };
39#
40# layout(location = 0) out vec4 _GLF_color;
41#
42# void main()
43# {
44#     int a = 0;
45#
46#     if(gl_FragCoord.y > 10.0)
47#     {
48#         a++;
49#     }
50#
51#     // Before division a is either 0 or 1. In both cases integer division results in zero.
52#     a /= 2;
53#
54#     // Always true.
55#     if(a == 0)
56#     {
57#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
58#     }
59#     else
60#     {
61#         _GLF_color = vec4(_int_0);
62#     }
63# }
64SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
65; SPIR-V
66; Version: 1.0
67; Generator: Khronos Glslang Reference Front End; 10
68; Bound: 60
69; Schema: 0
70               OpCapability Shader
71          %1 = OpExtInstImport "GLSL.std.450"
72               OpMemoryModel Logical GLSL450
73               OpEntryPoint Fragment %4 "main" %13 %35
74               OpExecutionMode %4 OriginUpperLeft
75               OpSource ESSL 320
76               OpName %4 "main"
77               OpName %8 "a"
78               OpName %13 "gl_FragCoord"
79               OpName %35 "_GLF_color"
80               OpName %38 "buf0"
81               OpMemberName %38 0 "_GLF_uniform_int_values"
82               OpName %40 ""
83               OpDecorate %13 BuiltIn FragCoord
84               OpDecorate %35 Location 0
85               OpDecorate %37 ArrayStride 16
86               OpMemberDecorate %38 0 Offset 0
87               OpDecorate %38 Block
88               OpDecorate %40 DescriptorSet 0
89               OpDecorate %40 Binding 0
90          %2 = OpTypeVoid
91          %3 = OpTypeFunction %2
92          %6 = OpTypeInt 32 1
93          %7 = OpTypePointer Function %6
94          %9 = OpConstant %6 0
95         %10 = OpTypeFloat 32
96         %11 = OpTypeVector %10 4
97         %12 = OpTypePointer Input %11
98         %13 = OpVariable %12 Input
99         %14 = OpTypeInt 32 0
100         %15 = OpConstant %14 1
101         %16 = OpTypePointer Input %10
102         %19 = OpConstant %10 10
103         %20 = OpTypeBool
104         %25 = OpConstant %6 1
105         %27 = OpConstant %6 2
106         %34 = OpTypePointer Output %11
107         %35 = OpVariable %34 Output
108         %36 = OpConstant %14 2
109         %37 = OpTypeArray %6 %36
110         %38 = OpTypeStruct %37
111         %39 = OpTypePointer Uniform %38
112         %40 = OpVariable %39 Uniform
113         %41 = OpTypePointer Uniform %6
114          %4 = OpFunction %2 None %3
115          %5 = OpLabel
116          %8 = OpVariable %7 Function
117               OpStore %8 %9
118         %17 = OpAccessChain %16 %13 %15
119         %18 = OpLoad %10 %17
120         %21 = OpFOrdGreaterThan %20 %18 %19
121               OpSelectionMerge %23 None
122               OpBranchConditional %21 %22 %23
123         %22 = OpLabel
124         %24 = OpLoad %6 %8
125         %26 = OpIAdd %6 %24 %25
126               OpStore %8 %26
127               OpBranch %23
128         %23 = OpLabel
129         %28 = OpLoad %6 %8
130         %29 = OpSDiv %6 %28 %27
131               OpStore %8 %29
132         %30 = OpLoad %6 %8
133         %31 = OpIEqual %20 %30 %9
134               OpSelectionMerge %33 None
135               OpBranchConditional %31 %32 %55
136         %32 = OpLabel
137         %42 = OpAccessChain %41 %40 %9 %9
138         %43 = OpLoad %6 %42
139         %44 = OpConvertSToF %10 %43
140         %45 = OpAccessChain %41 %40 %9 %25
141         %46 = OpLoad %6 %45
142         %47 = OpConvertSToF %10 %46
143         %48 = OpAccessChain %41 %40 %9 %25
144         %49 = OpLoad %6 %48
145         %50 = OpConvertSToF %10 %49
146         %51 = OpAccessChain %41 %40 %9 %9
147         %52 = OpLoad %6 %51
148         %53 = OpConvertSToF %10 %52
149         %54 = OpCompositeConstruct %11 %44 %47 %50 %53
150               OpStore %35 %54
151               OpBranch %33
152         %55 = OpLabel
153         %56 = OpAccessChain %41 %40 %9 %25
154         %57 = OpLoad %6 %56
155         %58 = OpConvertSToF %10 %57
156         %59 = OpCompositeConstruct %11 %58 %58 %58 %58
157               OpStore %35 %59
158               OpBranch %33
159         %33 = OpLabel
160               OpReturn
161               OpFunctionEnd
162END
163
164# uniforms for variant
165
166# _GLF_uniform_int_values
167BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
168 1 0
169END
170
171BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
172
173PIPELINE graphics variant_pipeline
174  ATTACH variant_vertex_shader
175  ATTACH variant_fragment_shader
176  FRAMEBUFFER_SIZE 256 256
177  BIND BUFFER variant_framebuffer AS color LOCATION 0
178  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
179END
180CLEAR_COLOR variant_pipeline 0 0 0 255
181
182CLEAR variant_pipeline
183RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
184
185EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
186