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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_LOCATIONS_H_ | 5 #ifndef VM_LOCATIONS_H_ |
6 #define VM_LOCATIONS_H_ | 6 #define VM_LOCATIONS_H_ |
7 | 7 |
8 #include "vm/allocation.h" | 8 #include "vm/allocation.h" |
9 #include "vm/assembler.h" | 9 #include "vm/assembler.h" |
10 #include "vm/bitfield.h" | 10 #include "vm/bitfield.h" |
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89 ASSERT(&obj == &loc.constant()); | 89 ASSERT(&obj == &loc.constant()); |
90 return loc; | 90 return loc; |
91 } | 91 } |
92 | 92 |
93 const Object& constant() const { | 93 const Object& constant() const { |
94 ASSERT(IsConstant()); | 94 ASSERT(IsConstant()); |
95 return *reinterpret_cast<const Object*>(value_ & ~kConstantMask); | 95 return *reinterpret_cast<const Object*>(value_ & ~kConstantMask); |
96 } | 96 } |
97 | 97 |
98 // Unallocated locations. | 98 // Unallocated locations. |
99 // TODO(vegorov): writable register policy? | |
100 enum Policy { | 99 enum Policy { |
101 kAny, | 100 kAny, |
102 kPrefersRegister, | 101 kPrefersRegister, |
103 kRequiresRegister, | 102 kRequiresRegister, |
104 kRequiresXmmRegister, | 103 kRequiresXmmRegister, |
| 104 kWritableRegister, |
105 kSameAsFirstInput, | 105 kSameAsFirstInput, |
106 }; | 106 }; |
107 | 107 |
108 bool IsUnallocated() const { | 108 bool IsUnallocated() const { |
109 return kind() == kUnallocated; | 109 return kind() == kUnallocated; |
110 } | 110 } |
111 | 111 |
112 bool IsRegisterBeneficial() { | 112 bool IsRegisterBeneficial() { |
113 return !Equals(Any()); | 113 return !Equals(Any()); |
114 } | 114 } |
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127 } | 127 } |
128 | 128 |
129 static Location RequiresRegister() { | 129 static Location RequiresRegister() { |
130 return UnallocatedLocation(kRequiresRegister); | 130 return UnallocatedLocation(kRequiresRegister); |
131 } | 131 } |
132 | 132 |
133 static Location RequiresXmmRegister() { | 133 static Location RequiresXmmRegister() { |
134 return UnallocatedLocation(kRequiresXmmRegister); | 134 return UnallocatedLocation(kRequiresXmmRegister); |
135 } | 135 } |
136 | 136 |
| 137 static Location WritableRegister() { |
| 138 return UnallocatedLocation(kWritableRegister); |
| 139 } |
| 140 |
137 // The location of the first input to the instruction will be | 141 // The location of the first input to the instruction will be |
138 // used to replace this unallocated location. | 142 // used to replace this unallocated location. |
139 static Location SameAsFirstInput() { | 143 static Location SameAsFirstInput() { |
140 return UnallocatedLocation(kSameAsFirstInput); | 144 return UnallocatedLocation(kSameAsFirstInput); |
141 } | 145 } |
142 | 146 |
143 // Empty location. Used if there the location should be ignored. | 147 // Empty location. Used if there the location should be ignored. |
144 static Location NoLocation() { | 148 static Location NoLocation() { |
145 return Location(); | 149 return Location(); |
146 } | 150 } |
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410 BitmapBuilder* stack_bitmap_; | 414 BitmapBuilder* stack_bitmap_; |
411 | 415 |
412 const ContainsCall contains_call_; | 416 const ContainsCall contains_call_; |
413 RegisterSet live_registers_; | 417 RegisterSet live_registers_; |
414 }; | 418 }; |
415 | 419 |
416 | 420 |
417 } // namespace dart | 421 } // namespace dart |
418 | 422 |
419 #endif // VM_LOCATIONS_H_ | 423 #endif // VM_LOCATIONS_H_ |
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