blob: df8cc628a678e7085e12812e8876a4385c0d30df (
plain)
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
|
/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
*
* 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 "DeadObjectElimination.h"
#include <set>
namespace
{
std::set<coco::Object *> dead_objects(const coco::Module *m)
{
std::set<coco::Object *> res;
for (uint32_t n = 0; n < m->entity()->object()->size(); ++n)
{
auto obj = m->entity()->object()->at(n);
if (auto bag = obj->bag())
{
if (coco::readers(bag).empty() && !(bag->isOutput()))
{
res.insert(obj);
}
}
else
{
// NOTE Just in case if there are Objects not related to Bags
if (obj->uses()->size() == 0)
{
res.insert(obj);
}
}
}
return res;
}
} // namespace
namespace enco
{
void eliminate_dead_object(enco::Code *code)
{
auto m = code->module();
// Destroy a dead object and its producer
for (auto obj : dead_objects(m))
{
if (auto producer = coco::producer(obj))
{
auto ins = producer->loc();
assert(ins != nullptr);
ins->detach();
m->entity()->instr()->destroy(ins);
}
m->entity()->object()->destroy(obj);
}
}
} // namespace enco
|
