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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ | 5 #ifndef V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
6 #define V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ | 6 #define V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
7 | 7 |
8 #include "src/interpreter/bytecodes.h" | 8 #include "src/interpreter/bytecodes.h" |
9 #include "src/zone-containers.h" | 9 #include "src/zone-containers.h" |
10 | 10 |
11 namespace v8 { | 11 namespace v8 { |
12 namespace internal { | 12 namespace internal { |
13 namespace interpreter { | 13 namespace interpreter { |
14 | 14 |
15 class BytecodeArrayBuilder; | 15 class BytecodeArrayBuilder; |
16 class Register; | 16 class Register; |
17 | 17 |
18 class TemporaryRegisterObserver; | |
rmcilroy
2016/05/26 10:24:52
nit - move into block above
oth
2016/05/26 21:26:50
Done.
| |
19 | |
18 class TemporaryRegisterAllocator final { | 20 class TemporaryRegisterAllocator final { |
19 public: | 21 public: |
20 TemporaryRegisterAllocator(Zone* zone, int start_index); | 22 TemporaryRegisterAllocator(Zone* zone, int start_index); |
21 | 23 |
22 // Borrow a temporary register. | 24 // Borrow a temporary register. |
23 int BorrowTemporaryRegister(); | 25 int BorrowTemporaryRegister(); |
24 | 26 |
25 // Borrow a temporary register from the register range outside of | 27 // Borrow a temporary register from the register range outside of |
26 // |start_index| to |end_index|. | 28 // |start_index| to |end_index|. |
27 int BorrowTemporaryRegisterNotInRange(int start_index, int end_index); | 29 int BorrowTemporaryRegisterNotInRange(int start_index, int end_index); |
(...skipping 19 matching lines...) Expand all Loading... | |
47 | 49 |
48 // Returns the last register in the range of temporary registers. | 50 // Returns the last register in the range of temporary registers. |
49 Register last_temporary_register() const; | 51 Register last_temporary_register() const; |
50 | 52 |
51 // Returns the start index of temporary register allocations. | 53 // Returns the start index of temporary register allocations. |
52 int allocation_base() const { return allocation_base_; } | 54 int allocation_base() const { return allocation_base_; } |
53 | 55 |
54 // Returns the number of temporary register allocations made. | 56 // Returns the number of temporary register allocations made. |
55 int allocation_count() const { return allocation_count_; } | 57 int allocation_count() const { return allocation_count_; } |
56 | 58 |
59 // Sets an observer for temporary register events. | |
60 void set_observer(TemporaryRegisterObserver* observer); | |
61 | |
57 private: | 62 private: |
58 // Allocate a temporary register. | 63 // Allocate a temporary register. |
59 int AllocateTemporaryRegister(); | 64 int AllocateTemporaryRegister(); |
60 | 65 |
61 ZoneSet<int> free_temporaries_; | 66 ZoneSet<int> free_temporaries_; |
62 int allocation_base_; | 67 int allocation_base_; |
63 int allocation_count_; | 68 int allocation_count_; |
69 TemporaryRegisterObserver* observer_; | |
64 | 70 |
65 DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterAllocator); | 71 DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterAllocator); |
66 }; | 72 }; |
67 | 73 |
74 class TemporaryRegisterObserver { | |
75 public: | |
76 virtual ~TemporaryRegisterObserver() {} | |
77 virtual void TemporaryRegisterFreeEvent(Register reg) = 0; | |
78 }; | |
79 | |
68 // A class that allows the instantiator to allocate temporary registers that are | 80 // A class that allows the instantiator to allocate temporary registers that are |
69 // cleaned up when scope is closed. | 81 // cleaned up when scope is closed. |
70 class BytecodeRegisterAllocator final { | 82 class BytecodeRegisterAllocator final { |
71 public: | 83 public: |
72 explicit BytecodeRegisterAllocator(Zone* zone, | 84 explicit BytecodeRegisterAllocator(Zone* zone, |
73 TemporaryRegisterAllocator* allocator); | 85 TemporaryRegisterAllocator* allocator); |
74 ~BytecodeRegisterAllocator(); | 86 ~BytecodeRegisterAllocator(); |
75 Register NewRegister(); | 87 Register NewRegister(); |
76 | 88 |
77 // Ensure |count| consecutive allocations are available. | 89 // Ensure |count| consecutive allocations are available. |
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97 | 109 |
98 DISALLOW_COPY_AND_ASSIGN(BytecodeRegisterAllocator); | 110 DISALLOW_COPY_AND_ASSIGN(BytecodeRegisterAllocator); |
99 }; | 111 }; |
100 | 112 |
101 } // namespace interpreter | 113 } // namespace interpreter |
102 } // namespace internal | 114 } // namespace internal |
103 } // namespace v8 | 115 } // namespace v8 |
104 | 116 |
105 | 117 |
106 #endif // V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ | 118 #endif // V8_INTERPRETER_BYTECODE_REGISTER_ALLOCATOR_H_ |
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