1#!amber
2
3# Copyright 2020 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 GraphicsFuzz.
19
20# Short description: A fragment shader that covers a specific OpKill wrapping code path
21
22# The test passes because shader always writes red.
23
24# Optimized using spirv-opt with the following arguments:
25# '--vector-dce'
26# '--combine-access-chains'
27# '--eliminate-local-multi-store'
28# '--scalar-replacement=100'
29# '--simplify-instructions'
30# '--eliminate-dead-branches'
31# '--merge-return'
32# '--combine-access-chains'
33# '--simplify-instructions'
34# '--eliminate-dead-branches'
35# '--merge-blocks'
36# spirv-opt commit hash: 9215c1b7df0029f27807e8c8d7ec80532ce90a87
37
38
39
40SHADER vertex variant_vertex_shader PASSTHROUGH
41
42# variant_fragment_shader is derived from the following GLSL:
43# #version 310 es
44# precision highp float;
45# precision highp int;
46#
47# layout(location = 0) out vec4 _GLF_color;
48#
49# layout(set = 0, binding = 0) uniform buf0
50# {
51#     int zero;
52# };
53#
54# void func(int x)
55# {
56#     // Always false.
57#     if (x < zero)
58#         discard;
59#
60#     if (x > 8)
61#         _GLF_color = vec4(1, 0, 0, 1);
62#     else
63#         _GLF_color = vec4(0);
64# }
65#
66# void main()
67# {
68#     _GLF_color = vec4(0);
69#
70#     for (int i = 0; i < 10 + zero; i++)
71#         func(i);
72# }
73SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
74; SPIR-V
75; Version: 1.0
76; Generator: Khronos Glslang Reference Front End; 8
77; Bound: 58
78; Schema: 0
79               OpCapability Shader
80          %1 = OpExtInstImport "GLSL.std.450"
81               OpMemoryModel Logical GLSL450
82               OpEntryPoint Fragment %4 "main" %33
83               OpExecutionMode %4 OriginUpperLeft
84               OpSource ESSL 310
85               OpName %4 "main"
86               OpName %10 "func(i1;"
87               OpName %9 "x"
88               OpName %13 "buf0"
89               OpMemberName %13 0 "zero"
90               OpName %15 ""
91               OpName %33 "_GLF_color"
92               OpName %39 "i"
93               OpName %51 "param"
94               OpMemberDecorate %13 0 Offset 0
95               OpDecorate %13 Block
96               OpDecorate %15 DescriptorSet 0
97               OpDecorate %15 Binding 0
98               OpDecorate %33 Location 0
99          %2 = OpTypeVoid
100          %3 = OpTypeFunction %2
101          %6 = OpTypeInt 32 1
102          %7 = OpTypePointer Function %6
103          %8 = OpTypeFunction %2 %7
104         %13 = OpTypeStruct %6
105         %14 = OpTypePointer Uniform %13
106         %15 = OpVariable %14 Uniform
107         %16 = OpConstant %6 0
108         %17 = OpTypePointer Uniform %6
109         %20 = OpTypeBool
110         %26 = OpConstant %6 8
111         %30 = OpTypeFloat 32
112         %31 = OpTypeVector %30 4
113         %32 = OpTypePointer Output %31
114         %33 = OpVariable %32 Output
115         %34 = OpConstant %30 1
116         %35 = OpConstant %30 0
117         %36 = OpConstantComposite %31 %34 %35 %35 %34
118         %38 = OpConstantComposite %31 %35 %35 %35 %35
119         %46 = OpConstant %6 10
120         %55 = OpConstant %6 1
121          %4 = OpFunction %2 None %3
122          %5 = OpLabel
123         %39 = OpVariable %7 Function
124         %51 = OpVariable %7 Function
125               OpStore %33 %38
126               OpStore %39 %16
127               OpBranch %40
128         %40 = OpLabel
129         %57 = OpPhi %6 %16 %5 %56 %41
130         %47 = OpAccessChain %17 %15 %16
131         %48 = OpLoad %6 %47
132         %49 = OpIAdd %6 %46 %48
133         %50 = OpSLessThan %20 %57 %49
134               OpLoopMerge %42 %41 None
135               OpBranchConditional %50 %41 %42
136         %41 = OpLabel
137               OpStore %51 %57
138         %53 = OpFunctionCall %2 %10 %51
139         %56 = OpIAdd %6 %57 %55
140               OpStore %39 %56
141               OpBranch %40
142         %42 = OpLabel
143               OpReturn
144               OpFunctionEnd
145         %10 = OpFunction %2 None %8
146          %9 = OpFunctionParameter %7
147         %11 = OpLabel
148         %12 = OpLoad %6 %9
149         %18 = OpAccessChain %17 %15 %16
150         %19 = OpLoad %6 %18
151         %21 = OpSLessThan %20 %12 %19
152               OpSelectionMerge %23 None
153               OpBranchConditional %21 %22 %23
154         %22 = OpLabel
155               OpKill
156         %23 = OpLabel
157         %25 = OpLoad %6 %9
158         %27 = OpSGreaterThan %20 %25 %26
159               OpSelectionMerge %29 None
160               OpBranchConditional %27 %28 %37
161         %28 = OpLabel
162               OpStore %33 %36
163               OpBranch %29
164         %37 = OpLabel
165               OpStore %33 %38
166               OpBranch %29
167         %29 = OpLabel
168               OpReturn
169               OpFunctionEnd
170END
171
172# uniforms for variant
173
174# zero
175BUFFER variant_zero DATA_TYPE int32 DATA
176 0
177END
178
179BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
180
181PIPELINE graphics variant_pipeline
182  ATTACH variant_vertex_shader
183  ATTACH variant_fragment_shader
184  FRAMEBUFFER_SIZE 256 256
185  BIND BUFFER variant_framebuffer AS color LOCATION 0
186  BIND BUFFER variant_zero AS uniform DESCRIPTOR_SET 0 BINDING 0
187END
188CLEAR_COLOR variant_pipeline 0 0 0 255
189
190CLEAR variant_pipeline
191RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
192
193EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
194