blob: 861a4471e81039c4e533f1b6d45781da23a0e3d2 (
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
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
|
/*
* 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.
*/
#ifndef wasm_analysis_cfg_impl_h
#define wasm_analysis_cfg_impl_h
#include "cfg.h"
namespace wasm::analysis {
// An iterator over a sequence of contiguous pointers (represented as a pointer
// to a pointer in the sequence) that dereferences the pointed-to pointer.
// TODO: Move this to its own public header if there is ever another use for it.
template<typename T> struct _indirect_ptr_iterator {
using iterator_category = std::random_access_iterator_tag;
using value_type = T;
using difference_type = off_t;
using reference = const T&;
using pointer = const T*;
const T* const* ptr;
const T& operator*() const { return **ptr; }
const T& operator[](int n) const { return **(ptr + n); }
_indirect_ptr_iterator& operator+=(int n) {
ptr += n;
return *this;
}
_indirect_ptr_iterator& operator-=(int n) {
ptr -= n;
return *this;
}
_indirect_ptr_iterator& operator++() { return *this += 1; }
_indirect_ptr_iterator operator++(int) {
_indirect_ptr_iterator it = *this;
++(*this);
return it;
}
_indirect_ptr_iterator& operator--() { return *this -= 1; }
_indirect_ptr_iterator operator--(int) {
_indirect_ptr_iterator it = *this;
--(*this);
return it;
}
_indirect_ptr_iterator operator+(int n) const {
_indirect_ptr_iterator it = *this;
it += n;
return it;
}
_indirect_ptr_iterator operator-(int n) const {
_indirect_ptr_iterator it = *this;
it -= n;
return it;
}
off_t operator-(const _indirect_ptr_iterator& other) const {
return ptr - other.ptr;
}
bool operator==(const _indirect_ptr_iterator& other) const {
return ptr == other.ptr;
}
bool operator!=(const _indirect_ptr_iterator& other) const {
return !(*this == other);
}
bool operator<(const _indirect_ptr_iterator& other) const {
return ptr < other.ptr;
}
bool operator>(const _indirect_ptr_iterator& other) const {
return ptr > other.ptr;
}
bool operator<=(const _indirect_ptr_iterator& other) const {
return ptr <= other.ptr;
}
bool operator>=(const _indirect_ptr_iterator& other) const {
return ptr >= other.ptr;
}
friend _indirect_ptr_iterator operator+(off_t n,
const _indirect_ptr_iterator& it) {
return it + n;
}
};
#if __cplusplus >= 202002L
static_assert(std::random_access_iterator<_indirect_ptr_iterator<int>>);
#endif
template<typename T>
_indirect_ptr_iterator<T> operator+(int n,
const _indirect_ptr_iterator<T>& it) {
return it + n;
}
// Wraps a vector of pointers and provides dereferencing iterators for it.
template<typename T> struct _indirect_ptr_vec {
using iterator = _indirect_ptr_iterator<T>;
const std::vector<T*>& vec;
_indirect_ptr_vec(const std::vector<T*>& vec) : vec(vec) {}
iterator begin() const { return {&vec.data()[0]}; }
iterator end() const { return {&vec.data()[vec.size()]}; }
};
struct BasicBlock::BasicBlockIterable : _indirect_ptr_vec<BasicBlock> {
BasicBlockIterable(const std::vector<BasicBlock*>& blocks)
: _indirect_ptr_vec(blocks) {}
};
inline BasicBlock::BasicBlockIterable BasicBlock::preds() const {
return BasicBlockIterable(predecessors);
}
inline BasicBlock::BasicBlockIterable BasicBlock::succs() const {
return BasicBlockIterable(successors);
}
} // namespace wasm::analysis
#endif // wasm_analysis_cfg_impl_h
|
