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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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_COMPILER_FRAME_H_ | 5 #ifndef V8_COMPILER_FRAME_H_ |
6 #define V8_COMPILER_FRAME_H_ | 6 #define V8_COMPILER_FRAME_H_ |
7 | 7 |
8 #include "src/v8.h" | 8 #include "src/v8.h" |
9 | 9 |
10 #include "src/data-flow.h" | 10 #include "src/data-flow.h" |
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23 : register_save_area_size_(0), | 23 : register_save_area_size_(0), |
24 spill_slot_count_(0), | 24 spill_slot_count_(0), |
25 double_spill_slot_count_(0), | 25 double_spill_slot_count_(0), |
26 allocated_registers_(NULL), | 26 allocated_registers_(NULL), |
27 allocated_double_registers_(NULL) {} | 27 allocated_double_registers_(NULL) {} |
28 | 28 |
29 inline int GetSpillSlotCount() { return spill_slot_count_; } | 29 inline int GetSpillSlotCount() { return spill_slot_count_; } |
30 inline int GetDoubleSpillSlotCount() { return double_spill_slot_count_; } | 30 inline int GetDoubleSpillSlotCount() { return double_spill_slot_count_; } |
31 | 31 |
32 void SetAllocatedRegisters(BitVector* regs) { | 32 void SetAllocatedRegisters(BitVector* regs) { |
33 ASSERT(allocated_registers_ == NULL); | 33 DCHECK(allocated_registers_ == NULL); |
34 allocated_registers_ = regs; | 34 allocated_registers_ = regs; |
35 } | 35 } |
36 | 36 |
37 void SetAllocatedDoubleRegisters(BitVector* regs) { | 37 void SetAllocatedDoubleRegisters(BitVector* regs) { |
38 ASSERT(allocated_double_registers_ == NULL); | 38 DCHECK(allocated_double_registers_ == NULL); |
39 allocated_double_registers_ = regs; | 39 allocated_double_registers_ = regs; |
40 } | 40 } |
41 | 41 |
42 bool DidAllocateDoubleRegisters() { | 42 bool DidAllocateDoubleRegisters() { |
43 return !allocated_double_registers_->IsEmpty(); | 43 return !allocated_double_registers_->IsEmpty(); |
44 } | 44 } |
45 | 45 |
46 void SetRegisterSaveAreaSize(int size) { | 46 void SetRegisterSaveAreaSize(int size) { |
47 ASSERT(IsAligned(size, kPointerSize)); | 47 DCHECK(IsAligned(size, kPointerSize)); |
48 register_save_area_size_ = size; | 48 register_save_area_size_ = size; |
49 } | 49 } |
50 | 50 |
51 int GetRegisterSaveAreaSize() { return register_save_area_size_; } | 51 int GetRegisterSaveAreaSize() { return register_save_area_size_; } |
52 | 52 |
53 int AllocateSpillSlot(bool is_double) { | 53 int AllocateSpillSlot(bool is_double) { |
54 // If 32-bit, skip one if the new slot is a double. | 54 // If 32-bit, skip one if the new slot is a double. |
55 if (is_double) { | 55 if (is_double) { |
56 if (kDoubleSize > kPointerSize) { | 56 if (kDoubleSize > kPointerSize) { |
57 ASSERT(kDoubleSize == kPointerSize * 2); | 57 DCHECK(kDoubleSize == kPointerSize * 2); |
58 spill_slot_count_++; | 58 spill_slot_count_++; |
59 spill_slot_count_ |= 1; | 59 spill_slot_count_ |= 1; |
60 } | 60 } |
61 double_spill_slot_count_++; | 61 double_spill_slot_count_++; |
62 } | 62 } |
63 return spill_slot_count_++; | 63 return spill_slot_count_++; |
64 } | 64 } |
65 | 65 |
66 private: | 66 private: |
67 int register_save_area_size_; | 67 int register_save_area_size_; |
68 int spill_slot_count_; | 68 int spill_slot_count_; |
69 int double_spill_slot_count_; | 69 int double_spill_slot_count_; |
70 BitVector* allocated_registers_; | 70 BitVector* allocated_registers_; |
71 BitVector* allocated_double_registers_; | 71 BitVector* allocated_double_registers_; |
72 }; | 72 }; |
73 | 73 |
74 | 74 |
75 // Represents an offset from either the stack pointer or frame pointer. | 75 // Represents an offset from either the stack pointer or frame pointer. |
76 class FrameOffset { | 76 class FrameOffset { |
77 public: | 77 public: |
78 inline bool from_stack_pointer() { return (offset_ & 1) == kFromSp; } | 78 inline bool from_stack_pointer() { return (offset_ & 1) == kFromSp; } |
79 inline bool from_frame_pointer() { return (offset_ & 1) == kFromFp; } | 79 inline bool from_frame_pointer() { return (offset_ & 1) == kFromFp; } |
80 inline int offset() { return offset_ & ~1; } | 80 inline int offset() { return offset_ & ~1; } |
81 | 81 |
82 inline static FrameOffset FromStackPointer(int offset) { | 82 inline static FrameOffset FromStackPointer(int offset) { |
83 ASSERT((offset & 1) == 0); | 83 DCHECK((offset & 1) == 0); |
84 return FrameOffset(offset | kFromSp); | 84 return FrameOffset(offset | kFromSp); |
85 } | 85 } |
86 | 86 |
87 inline static FrameOffset FromFramePointer(int offset) { | 87 inline static FrameOffset FromFramePointer(int offset) { |
88 ASSERT((offset & 1) == 0); | 88 DCHECK((offset & 1) == 0); |
89 return FrameOffset(offset | kFromFp); | 89 return FrameOffset(offset | kFromFp); |
90 } | 90 } |
91 | 91 |
92 private: | 92 private: |
93 explicit FrameOffset(int offset) : offset_(offset) {} | 93 explicit FrameOffset(int offset) : offset_(offset) {} |
94 | 94 |
95 int offset_; // Encodes SP or FP in the low order bit. | 95 int offset_; // Encodes SP or FP in the low order bit. |
96 | 96 |
97 static const int kFromSp = 1; | 97 static const int kFromSp = 1; |
98 static const int kFromFp = 0; | 98 static const int kFromFp = 0; |
99 }; | 99 }; |
100 } | 100 } |
101 } | 101 } |
102 } // namespace v8::internal::compiler | 102 } // namespace v8::internal::compiler |
103 | 103 |
104 #endif // V8_COMPILER_FRAME_H_ | 104 #endif // V8_COMPILER_FRAME_H_ |
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