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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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_ARM64_ASSEMBLER_ARM64_H_ | 5 #ifndef V8_ARM64_ASSEMBLER_ARM64_H_ |
6 #define V8_ARM64_ASSEMBLER_ARM64_H_ | 6 #define V8_ARM64_ASSEMBLER_ARM64_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 #include <list> | 9 #include <list> |
10 #include <map> | 10 #include <map> |
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3462 // Relocation info records are also used during code generation as temporary | 3462 // Relocation info records are also used during code generation as temporary |
3463 // containers for constants and code target addresses until they are emitted | 3463 // containers for constants and code target addresses until they are emitted |
3464 // to the constant pool. These pending relocation info records are temporarily | 3464 // to the constant pool. These pending relocation info records are temporarily |
3465 // stored in a separate buffer until a constant pool is emitted. | 3465 // stored in a separate buffer until a constant pool is emitted. |
3466 // If every instruction in a long sequence is accessing the pool, we need one | 3466 // If every instruction in a long sequence is accessing the pool, we need one |
3467 // pending relocation entry per instruction. | 3467 // pending relocation entry per instruction. |
3468 | 3468 |
3469 // The pending constant pool. | 3469 // The pending constant pool. |
3470 ConstPool constpool_; | 3470 ConstPool constpool_; |
3471 | 3471 |
3472 // Relocation for a type-recording IC has the AST id added to it. This | |
3473 // member variable is a way to pass the information from the call site to | |
3474 // the relocation info. | |
3475 TypeFeedbackId recorded_ast_id_; | |
3476 | |
3477 inline TypeFeedbackId RecordedAstId(); | |
3478 inline void ClearRecordedAstId(); | |
3479 | |
3480 protected: | 3472 protected: |
3481 // Record the AST id of the CallIC being compiled, so that it can be placed | |
3482 // in the relocation information. | |
3483 void SetRecordedAstId(TypeFeedbackId ast_id) { | |
3484 DCHECK(recorded_ast_id_.IsNone()); | |
3485 recorded_ast_id_ = ast_id; | |
3486 } | |
3487 | |
3488 // Code generation | 3473 // Code generation |
3489 // The relocation writer's position is at least kGap bytes below the end of | 3474 // The relocation writer's position is at least kGap bytes below the end of |
3490 // the generated instructions. This is so that multi-instruction sequences do | 3475 // the generated instructions. This is so that multi-instruction sequences do |
3491 // not have to check for overflow. The same is true for writes of large | 3476 // not have to check for overflow. The same is true for writes of large |
3492 // relocation info entries, and debug strings encoded in the instruction | 3477 // relocation info entries, and debug strings encoded in the instruction |
3493 // stream. | 3478 // stream. |
3494 static constexpr int kGap = 128; | 3479 static constexpr int kGap = 128; |
3495 | 3480 |
3496 public: | 3481 public: |
3497 #ifdef DEBUG | 3482 #ifdef DEBUG |
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3627 public: | 3612 public: |
3628 explicit EnsureSpace(Assembler* assembler) { | 3613 explicit EnsureSpace(Assembler* assembler) { |
3629 assembler->CheckBufferSpace(); | 3614 assembler->CheckBufferSpace(); |
3630 } | 3615 } |
3631 }; | 3616 }; |
3632 | 3617 |
3633 } // namespace internal | 3618 } // namespace internal |
3634 } // namespace v8 | 3619 } // namespace v8 |
3635 | 3620 |
3636 #endif // V8_ARM64_ASSEMBLER_ARM64_H_ | 3621 #endif // V8_ARM64_ASSEMBLER_ARM64_H_ |
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