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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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138 // Spill all occurrences of a specific register from the frame. | 138 // Spill all occurrences of a specific register from the frame. |
139 void Spill(Register reg) { | 139 void Spill(Register reg) { |
140 if (is_used(reg)) SpillElementAt(register_location(reg)); | 140 if (is_used(reg)) SpillElementAt(register_location(reg)); |
141 } | 141 } |
142 | 142 |
143 // Spill all occurrences of an arbitrary register if possible. Return the | 143 // Spill all occurrences of an arbitrary register if possible. Return the |
144 // register spilled or no_reg if it was not possible to free any register | 144 // register spilled or no_reg if it was not possible to free any register |
145 // (ie, they all have frame-external references). | 145 // (ie, they all have frame-external references). |
146 Register SpillAnyRegister(); | 146 Register SpillAnyRegister(); |
147 | 147 |
| 148 // Spill the top element of the frame to memory. |
| 149 void SpillTop() { SpillElementAt(element_count() - 1); } |
| 150 |
148 // Sync the range of elements in [begin, end] with memory. | 151 // Sync the range of elements in [begin, end] with memory. |
149 void SyncRange(int begin, int end); | 152 void SyncRange(int begin, int end); |
150 | 153 |
151 // Make this frame so that an arbitrary frame of the same height can | 154 // Make this frame so that an arbitrary frame of the same height can |
152 // be merged to it. Copies and constants are removed from the frame. | 155 // be merged to it. Copies and constants are removed from the frame. |
153 void MakeMergable(); | 156 void MakeMergable(); |
154 | 157 |
155 // Prepare this virtual frame for merging to an expected frame by | 158 // Prepare this virtual frame for merging to an expected frame by |
156 // performing some state changes that do not require generating | 159 // performing some state changes that do not require generating |
157 // code. It is guaranteed that no code will be generated. | 160 // code. It is guaranteed that no code will be generated. |
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560 | 563 |
561 // Classes that need raw access to the elements_ array. | 564 // Classes that need raw access to the elements_ array. |
562 friend class DeferredCode; | 565 friend class DeferredCode; |
563 friend class JumpTarget; | 566 friend class JumpTarget; |
564 }; | 567 }; |
565 | 568 |
566 | 569 |
567 } } // namespace v8::internal | 570 } } // namespace v8::internal |
568 | 571 |
569 #endif // V8_X64_VIRTUAL_FRAME_X64_H_ | 572 #endif // V8_X64_VIRTUAL_FRAME_X64_H_ |
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