| | 1 | /* |
| | 2 | * Copyright (C) 2013 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * Redistribution and use in source and binary forms, with or without |
| | 5 | * modification, are permitted provided that the following conditions |
| | 6 | * are met: |
| | 7 | * 1. Redistributions of source code must retain the above copyright |
| | 8 | * notice, this list of conditions and the following disclaimer. |
| | 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 10 | * notice, this list of conditions and the following disclaimer in the |
| | 11 | * documentation and/or other materials provided with the distribution. |
| | 12 | * |
| | 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| | 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| | 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| | 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| | 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| | 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| | 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| | 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| | 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| | 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| | 24 | */ |
| | 25 | |
| | 26 | #ifndef DFGAtTailAbstractState_h |
| | 27 | #define DFGAtTailAbstractState_h |
| | 28 | |
| | 29 | #if ENABLE(DFG_JIT) |
| | 30 | |
| | 31 | #include "DFGAbstractValue.h" |
| | 32 | #include "DFGBasicBlock.h" |
| | 33 | #include "DFGGraph.h" |
| | 34 | |
| | 35 | namespace JSC { namespace DFG { |
| | 36 | |
| | 37 | class AtTailAbstractState { |
| | 38 | public: |
| | 39 | AtTailAbstractState(); |
| | 40 | |
| | 41 | ~AtTailAbstractState(); |
| | 42 | |
| | 43 | void initializeTo(BasicBlock* block) |
| | 44 | { |
| | 45 | m_block = block; |
| | 46 | } |
| | 47 | |
| | 48 | void createValueForNode(Node*); |
| | 49 | AbstractValue& forNode(Node*); |
| | 50 | AbstractValue& forNode(Edge edge) { return forNode(edge.node()); } |
| | 51 | Operands<AbstractValue>& variables() { return m_block->valuesAtTail; } |
| | 52 | |
| | 53 | BasicBlock* block() const { return m_block; } |
| | 54 | |
| | 55 | bool isValid() { return m_block->cfaDidFinish; } |
| | 56 | |
| | 57 | void setDidClobber(bool) { } |
| | 58 | void setIsValid(bool isValid) { m_block->cfaDidFinish = isValid; } |
| | 59 | void setBranchDirection(BranchDirection) { } |
| | 60 | void setFoundConstants(bool) { } |
| | 61 | bool haveStructures() const { return true; } // It's always safe to return true. |
| | 62 | void setHaveStructures(bool) { } |
| | 63 | |
| | 64 | private: |
| | 65 | BasicBlock* m_block; |
| | 66 | }; |
| | 67 | |
| | 68 | } } // namespace JSC::DFG |
| | 69 | |
| | 70 | #endif // ENABLE(DFG_JIT) |
| | 71 | |
| | 72 | #endif // DFGAtTailAbstractState_h |
| | 73 | |
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