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
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
#define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
#include "base/bit_field.h"
#include "globals.h"
#include "instruction_set.h"
#include "locations.h"
#include "memory_region.h"
#include "nodes.h"
#include "utils/assembler.h"
namespace art {
static size_t constexpr kVRegSize = 4;
class DexCompilationUnit;
class CodeAllocator {
public:
CodeAllocator() { }
virtual ~CodeAllocator() { }
virtual uint8_t* Allocate(size_t size) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(CodeAllocator);
};
struct PcInfo {
uint32_t dex_pc;
uintptr_t native_pc;
};
class CodeGenerator : public ArenaObject {
public:
// Compiles the graph to executable instructions. Returns whether the compilation
// succeeded.
void Compile(CodeAllocator* allocator);
static CodeGenerator* Create(ArenaAllocator* allocator,
HGraph* graph,
InstructionSet instruction_set);
HGraph* GetGraph() const { return graph_; }
Label* GetLabelOf(HBasicBlock* block) const;
bool GoesToNextBlock(HBasicBlock* current, HBasicBlock* next) const;
virtual void GenerateFrameEntry() = 0;
virtual void GenerateFrameExit() = 0;
virtual void Bind(Label* label) = 0;
virtual void Move(HInstruction* instruction, Location location, HInstruction* move_for) = 0;
virtual HGraphVisitor* GetLocationBuilder() = 0;
virtual HGraphVisitor* GetInstructionVisitor() = 0;
virtual Assembler* GetAssembler() = 0;
virtual size_t GetWordSize() const = 0;
uint32_t GetFrameSize() const { return frame_size_; }
void SetFrameSize(uint32_t size) { frame_size_ = size; }
uint32_t GetCoreSpillMask() const { return core_spill_mask_; }
virtual size_t GetNumberOfCoreRegisters() const = 0;
virtual size_t GetNumberOfFloatingPointRegisters() const = 0;
virtual size_t GetNumberOfRegisters() const = 0;
virtual void SetupBlockedRegisters(bool* blocked_registers) const = 0;
virtual void DumpCoreRegister(std::ostream& stream, int reg) const = 0;
virtual void DumpFloatingPointRegister(std::ostream& stream, int reg) const = 0;
void RecordPcInfo(uint32_t dex_pc) {
struct PcInfo pc_info;
pc_info.dex_pc = dex_pc;
pc_info.native_pc = GetAssembler()->CodeSize();
pc_infos_.Add(pc_info);
}
void BuildMappingTable(std::vector<uint8_t>* vector) const;
void BuildVMapTable(std::vector<uint8_t>* vector) const;
void BuildNativeGCMap(
std::vector<uint8_t>* vector, const DexCompilationUnit& dex_compilation_unit) const;
protected:
CodeGenerator(HGraph* graph, size_t number_of_registers)
: frame_size_(0),
graph_(graph),
block_labels_(graph->GetArena(), 0),
pc_infos_(graph->GetArena(), 32),
blocked_registers_(graph->GetArena()->AllocArray<bool>(number_of_registers)) {
block_labels_.SetSize(graph->GetBlocks().Size());
}
~CodeGenerator() { }
// Register allocation logic.
void AllocateRegistersLocally(HInstruction* instruction) const;
// Backend specific implementation for allocating a register.
virtual ManagedRegister AllocateFreeRegister(Primitive::Type type,
bool* blocked_registers) const = 0;
// Raw implementation of allocating a register: loops over blocked_registers to find
// the first available register.
size_t AllocateFreeRegisterInternal(bool* blocked_registers, size_t number_of_registers) const;
virtual Location GetStackLocation(HLoadLocal* load) const = 0;
// Frame size required for this method.
uint32_t frame_size_;
uint32_t core_spill_mask_;
private:
void InitLocations(HInstruction* instruction);
void CompileBlock(HBasicBlock* block);
HGraph* const graph_;
// Labels for each block that will be compiled.
GrowableArray<Label> block_labels_;
GrowableArray<PcInfo> pc_infos_;
// Temporary data structure used when doing register allocation.
bool* const blocked_registers_;
DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
};
template <typename T>
class CallingConvention {
public:
CallingConvention(const T* registers, int number_of_registers)
: registers_(registers), number_of_registers_(number_of_registers) {}
size_t GetNumberOfRegisters() const { return number_of_registers_; }
T GetRegisterAt(size_t index) const {
DCHECK_LT(index, number_of_registers_);
return registers_[index];
}
uint8_t GetStackOffsetOf(size_t index, size_t word_size) const {
// We still reserve the space for parameters passed by registers.
// Add word_size for the method pointer.
return index * kVRegSize + word_size;
}
private:
const T* registers_;
const size_t number_of_registers_;
DISALLOW_COPY_AND_ASSIGN(CallingConvention);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_H_
|
