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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
// Copyright (c) 2016 Google Inc.
//
// 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 SOURCE_OPT_FUNCTION_H_
#define SOURCE_OPT_FUNCTION_H_
#include <algorithm>
#include <functional>
#include <memory>
#include <utility>
#include <vector>
#include "basic_block.h"
#include "instruction.h"
#include "iterator.h"
namespace spvtools {
namespace opt {
class CFG;
class IRContext;
class Module;
// A SPIR-V function.
class Function {
public:
using iterator = UptrVectorIterator<BasicBlock>;
using const_iterator = UptrVectorIterator<BasicBlock, true>;
// Creates a function instance declared by the given OpFunction instruction
// |def_inst|.
inline explicit Function(std::unique_ptr<Instruction> def_inst);
explicit Function(const Function& f) = delete;
// Creates a clone of the instruction in the given |context|
//
// The parent module will default to null and needs to be explicitly set by
// the user.
Function* Clone(IRContext*) const;
// The OpFunction instruction that begins the definition of this function.
Instruction& DefInst() { return *def_inst_; }
const Instruction& DefInst() const { return *def_inst_; }
// Appends a parameter to this function.
inline void AddParameter(std::unique_ptr<Instruction> p);
// Appends a basic block to this function.
inline void AddBasicBlock(std::unique_ptr<BasicBlock> b);
// Appends a basic block to this function at the position |ip|.
inline void AddBasicBlock(std::unique_ptr<BasicBlock> b, iterator ip);
template <typename T>
inline void AddBasicBlocks(T begin, T end, iterator ip);
// Move basic block with |id| to the position after |ip|. Both have to be
// contained in this function.
inline void MoveBasicBlockToAfter(uint32_t id, BasicBlock* ip);
// Delete all basic blocks that contain no instructions.
inline void RemoveEmptyBlocks();
// Saves the given function end instruction.
inline void SetFunctionEnd(std::unique_ptr<Instruction> end_inst);
// Returns the given function end instruction.
inline Instruction* EndInst() { return end_inst_.get(); }
inline const Instruction* EndInst() const { return end_inst_.get(); }
// Returns function's id
inline uint32_t result_id() const { return def_inst_->result_id(); }
// Returns function's return type id
inline uint32_t type_id() const { return def_inst_->type_id(); }
// Returns the entry basic block for this function.
const std::unique_ptr<BasicBlock>& entry() const { return blocks_.front(); }
iterator begin() { return iterator(&blocks_, blocks_.begin()); }
iterator end() { return iterator(&blocks_, blocks_.end()); }
const_iterator begin() const { return cbegin(); }
const_iterator end() const { return cend(); }
const_iterator cbegin() const {
return const_iterator(&blocks_, blocks_.cbegin());
}
const_iterator cend() const {
return const_iterator(&blocks_, blocks_.cend());
}
// Returns an iterator to the basic block |id|.
iterator FindBlock(uint32_t bb_id) {
return std::find_if(begin(), end(), [bb_id](const BasicBlock& it_bb) {
return bb_id == it_bb.id();
});
}
// Runs the given function |f| on each instruction in this function, and
// optionally on debug line instructions that might precede them.
void ForEachInst(const std::function<void(Instruction*)>& f,
bool run_on_debug_line_insts = false);
void ForEachInst(const std::function<void(const Instruction*)>& f,
bool run_on_debug_line_insts = false) const;
// Runs the given function |f| on each parameter instruction in this function,
// and optionally on debug line instructions that might precede them.
void ForEachParam(const std::function<void(const Instruction*)>& f,
bool run_on_debug_line_insts = false) const;
BasicBlock* InsertBasicBlockAfter(std::unique_ptr<BasicBlock>&& new_block,
BasicBlock* position);
// Pretty-prints all the basic blocks in this function into a std::string.
//
// |options| are the disassembly options. SPV_BINARY_TO_TEXT_OPTION_NO_HEADER
// is always added to |options|.
std::string PrettyPrint(uint32_t options = 0u) const;
private:
// The OpFunction instruction that begins the definition of this function.
std::unique_ptr<Instruction> def_inst_;
// All parameters to this function.
std::vector<std::unique_ptr<Instruction>> params_;
// All basic blocks inside this function in specification order
std::vector<std::unique_ptr<BasicBlock>> blocks_;
// The OpFunctionEnd instruction.
std::unique_ptr<Instruction> end_inst_;
};
// Pretty-prints |func| to |str|. Returns |str|.
std::ostream& operator<<(std::ostream& str, const Function& func);
inline Function::Function(std::unique_ptr<Instruction> def_inst)
: def_inst_(std::move(def_inst)), end_inst_() {}
inline void Function::AddParameter(std::unique_ptr<Instruction> p) {
params_.emplace_back(std::move(p));
}
inline void Function::AddBasicBlock(std::unique_ptr<BasicBlock> b) {
AddBasicBlock(std::move(b), end());
}
inline void Function::AddBasicBlock(std::unique_ptr<BasicBlock> b,
iterator ip) {
ip.InsertBefore(std::move(b));
}
template <typename T>
inline void Function::AddBasicBlocks(T src_begin, T src_end, iterator ip) {
blocks_.insert(ip.Get(), std::make_move_iterator(src_begin),
std::make_move_iterator(src_end));
}
inline void Function::MoveBasicBlockToAfter(uint32_t id, BasicBlock* ip) {
auto block_to_move = std::move(*FindBlock(id).Get());
assert(block_to_move->GetParent() == ip->GetParent() &&
"Both blocks have to be in the same function.");
InsertBasicBlockAfter(std::move(block_to_move), ip);
blocks_.erase(std::find(std::begin(blocks_), std::end(blocks_), nullptr));
}
inline void Function::RemoveEmptyBlocks() {
auto first_empty =
std::remove_if(std::begin(blocks_), std::end(blocks_),
[](const std::unique_ptr<BasicBlock>& bb) -> bool {
return bb->GetLabelInst()->opcode() == SpvOpNop;
});
blocks_.erase(first_empty, std::end(blocks_));
}
inline void Function::SetFunctionEnd(std::unique_ptr<Instruction> end_inst) {
end_inst_ = std::move(end_inst);
}
} // namespace opt
} // namespace spvtools
#endif // SOURCE_OPT_FUNCTION_H_
|
