1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
// Copyright (c) 2020 André Perez Maselco
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "source/fuzz/transformation_expand_vector_reduction.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/instruction_descriptor.h"
namespace spvtools {
namespace fuzz {
TransformationExpandVectorReduction::TransformationExpandVectorReduction(
protobufs::TransformationExpandVectorReduction message)
: message_(std::move(message)) {}
TransformationExpandVectorReduction::TransformationExpandVectorReduction(
const uint32_t instruction_result_id,
const std::vector<uint32_t>& fresh_ids) {
message_.set_instruction_result_id(instruction_result_id);
*message_.mutable_fresh_ids() =
google::protobuf::RepeatedField<google::protobuf::uint32>(
fresh_ids.begin(), fresh_ids.end());
}
bool TransformationExpandVectorReduction::IsApplicable(
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
auto* instruction =
ir_context->get_def_use_mgr()->GetDef(message_.instruction_result_id());
// |instruction| must be defined.
if (!instruction) {
return false;
}
// |instruction| must be OpAny or OpAll.
if (instruction->opcode() != spv::Op::OpAny &&
instruction->opcode() != spv::Op::OpAll) {
return false;
}
// |message_.fresh_ids.size| must have the exact number of fresh ids required
// to apply the transformation.
if (static_cast<uint32_t>(message_.fresh_ids().size()) !=
GetRequiredFreshIdCount(ir_context, instruction)) {
return false;
}
std::set<uint32_t> ids_used_by_this_transformation;
for (uint32_t fresh_id : message_.fresh_ids()) {
// All ids in |message_.fresh_ids| must be fresh.
if (!fuzzerutil::IsFreshId(ir_context, fresh_id)) {
return false;
}
// All fresh ids need to be distinct.
if (!CheckIdIsFreshAndNotUsedByThisTransformation(
fresh_id, ir_context, &ids_used_by_this_transformation)) {
return false;
}
}
return true;
}
void TransformationExpandVectorReduction::Apply(
opt::IRContext* ir_context,
TransformationContext* transformation_context) const {
auto* instruction =
ir_context->get_def_use_mgr()->GetDef(message_.instruction_result_id());
auto* vector = ir_context->get_def_use_mgr()->GetDef(
instruction->GetSingleWordInOperand(0));
uint32_t vector_component_count = ir_context->get_type_mgr()
->GetType(vector->type_id())
->AsVector()
->element_count();
// Fresh id iterator.
auto fresh_id = message_.fresh_ids().begin();
// |vector_components| are the ids of the extracted components from |vector|.
std::vector<uint32_t> vector_components;
for (uint32_t i = 0; i < vector_component_count; i++) {
// Extracts the i-th |vector| component.
auto vector_component =
opt::Instruction(ir_context, spv::Op::OpCompositeExtract,
instruction->type_id(), *fresh_id++,
{{SPV_OPERAND_TYPE_ID, {vector->result_id()}},
{SPV_OPERAND_TYPE_LITERAL_INTEGER, {i}}});
instruction->InsertBefore(MakeUnique<opt::Instruction>(vector_component));
fuzzerutil::UpdateModuleIdBound(ir_context, vector_component.result_id());
vector_components.push_back(vector_component.result_id());
}
// The first two |vector| components are used in the first logical operation.
auto logical_instruction = opt::Instruction(
ir_context,
instruction->opcode() == spv::Op::OpAny ? spv::Op::OpLogicalOr
: spv::Op::OpLogicalAnd,
instruction->type_id(), *fresh_id++,
{{SPV_OPERAND_TYPE_ID, {vector_components[0]}},
{SPV_OPERAND_TYPE_ID, {vector_components[1]}}});
instruction->InsertBefore(MakeUnique<opt::Instruction>(logical_instruction));
fuzzerutil::UpdateModuleIdBound(ir_context, logical_instruction.result_id());
// Evaluates the remaining components.
for (uint32_t i = 2; i < vector_components.size(); i++) {
logical_instruction = opt::Instruction(
ir_context, logical_instruction.opcode(), instruction->type_id(),
*fresh_id++,
{{SPV_OPERAND_TYPE_ID, {vector_components[i]}},
{SPV_OPERAND_TYPE_ID, {logical_instruction.result_id()}}});
instruction->InsertBefore(
MakeUnique<opt::Instruction>(logical_instruction));
fuzzerutil::UpdateModuleIdBound(ir_context,
logical_instruction.result_id());
}
ir_context->InvalidateAnalysesExceptFor(opt::IRContext::kAnalysisNone);
// If it's possible to make a synonym of |instruction|, then add the fact that
// the last |logical_instruction| is a synonym of |instruction|.
if (fuzzerutil::CanMakeSynonymOf(ir_context, *transformation_context,
*instruction)) {
transformation_context->GetFactManager()->AddFactDataSynonym(
MakeDataDescriptor(logical_instruction.result_id(), {}),
MakeDataDescriptor(instruction->result_id(), {}));
}
}
protobufs::Transformation TransformationExpandVectorReduction::ToMessage()
const {
protobufs::Transformation result;
*result.mutable_expand_vector_reduction() = message_;
return result;
}
uint32_t TransformationExpandVectorReduction::GetRequiredFreshIdCount(
opt::IRContext* ir_context, opt::Instruction* instruction) {
// For each vector component, 1 OpCompositeExtract and 1 OpLogical* (except
// for the first component) instructions will be inserted.
return 2 * ir_context->get_type_mgr()
->GetType(ir_context->get_def_use_mgr()
->GetDef(instruction->GetSingleWordInOperand(0))
->type_id())
->AsVector()
->element_count() -
1;
}
std::unordered_set<uint32_t> TransformationExpandVectorReduction::GetFreshIds()
const {
std::unordered_set<uint32_t> result;
for (auto id : message_.fresh_ids()) {
result.insert(id);
}
return result;
}
} // namespace fuzz
} // namespace spvtools
|
