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| 1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 2008 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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| 94 inline void CopyTo(JumpTarget* destination) { | 94 inline void CopyTo(JumpTarget* destination) { |
| 95 *destination = *this; | 95 *destination = *this; |
| 96 } | 96 } |
| 97 | 97 |
| 98 // Emit a jump to the target. There must be a current frame at the | 98 // Emit a jump to the target. There must be a current frame at the |
| 99 // jump and there will be no current frame after the jump. | 99 // jump and there will be no current frame after the jump. |
| 100 virtual void Jump(); | 100 virtual void Jump(); |
| 101 | 101 |
| 102 // Emit a conditional branch to the target. There must be a current | 102 // Emit a conditional branch to the target. There must be a current |
| 103 // frame at the branch. The current frame will fall through to the | 103 // frame at the branch. The current frame will fall through to the |
| 104 // code after the branch. The arg is a result that is live both at | 104 // code after the branch. |
| 105 // the target and the fall-through. | |
| 106 virtual void Branch(Condition cc, Hint hint = no_hint); | 105 virtual void Branch(Condition cc, Hint hint = no_hint); |
| 107 | 106 |
| 108 // Bind a jump target. If there is no current frame at the binding | 107 // Bind a jump target. If there is no current frame at the binding |
| 109 // site, there must be at least one frame reaching via a forward | 108 // site, there must be at least one frame reaching via a forward |
| 110 // jump. | 109 // jump. |
| 111 virtual void Bind(); | 110 virtual void Bind(); |
| 112 | 111 |
| 113 // Emit a call to a jump target. There must be a current frame at | 112 // Emit a call to a jump target. There must be a current frame at |
| 114 // the call. The frame at the target is the same as the current | 113 // the call. The frame at the target is the same as the current |
| 115 // frame except for an extra return address on top of it. The frame | 114 // frame except for an extra return address on top of it. The frame |
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| 184 | 183 |
| 185 private: | 184 private: |
| 186 // The expected height of the expression stack where the target will | 185 // The expected height of the expression stack where the target will |
| 187 // be bound, statically known at initialization time. | 186 // be bound, statically known at initialization time. |
| 188 int expected_height_; | 187 int expected_height_; |
| 189 }; | 188 }; |
| 190 | 189 |
| 191 } } // namespace v8::internal | 190 } } // namespace v8::internal |
| 192 | 191 |
| 193 #endif // V8_JUMP_TARGET_LIGHT_H_ | 192 #endif // V8_JUMP_TARGET_LIGHT_H_ |
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