blob: 650a8c6fe33c5d23fd20feb54748c48b2c5310ce (
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
78
79
80
81
82
83
84
85
86
87
88
89
|
/*
* Copyright 2023 WebAssembly Community Group participants
*
* 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.
*/
// A generic CFG / basic block utility. Unlike the utilities in src/cfg/, this
// is a generic representation of a CFG rather than a generic builder of
// CFG-like objects. It lives here in src/analysis/ because it is primarily
// meant for use in the static analysis framework. Other Binaryen code will find
// it more idiomatic to use the utilities in src/cfg/.
#ifndef wasm_analysis_cfg_h
#define wasm_analysis_cfg_h
#include <iostream>
#include <vector>
#include "wasm.h"
namespace wasm::analysis {
struct CFG;
struct BasicBlock {
using iterator = std::vector<Expression*>::const_iterator;
// Iterate through instructions.
iterator begin() const { return insts.cbegin(); }
iterator end() const { return insts.cend(); }
size_t size() const { return insts.size(); }
using reverse_iterator = std::vector<Expression*>::const_reverse_iterator;
reverse_iterator rbegin() const { return insts.rbegin(); }
reverse_iterator rend() const { return insts.rend(); }
// Iterables for predecessor and successor blocks.
struct Predecessors;
struct Successors;
Predecessors preds() const;
Successors succs() const;
void print(std::ostream& os, Module* wasm = nullptr, size_t start = 0) const;
Index getIndex() const { return index; }
private:
Index index;
std::vector<Expression*> insts;
std::vector<BasicBlock*> predecessors;
std::vector<BasicBlock*> successors;
friend CFG;
};
struct CFG {
// Iterate through basic blocks.
using iterator = std::vector<BasicBlock>::const_iterator;
iterator begin() const { return blocks.cbegin(); }
iterator end() const { return blocks.cend(); }
size_t size() const { return blocks.size(); }
using reverse_iterator = std::vector<BasicBlock>::const_reverse_iterator;
reverse_iterator rbegin() const { return blocks.rbegin(); }
reverse_iterator rend() const { return blocks.rend(); }
static CFG fromFunction(Function* func);
void print(std::ostream& os, Module* wasm = nullptr) const;
private:
std::vector<BasicBlock> blocks;
friend BasicBlock;
};
} // namespace wasm::analysis
#include "cfg-impl.h"
#endif // wasm_analysis_cfg_h
|
