projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 6fe7ccc8 A |
1 | /* |
| 2 | * Copyright (C) 2011 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 DFGBasicBlock_h | |
| 27 | #define DFGBasicBlock_h | |
| 28 | ||
| 29 | #if ENABLE(DFG_JIT) | |
| 30 | ||
| 31 | #include "DFGAbstractValue.h" | |
| 32 | #include "DFGNode.h" | |
| 33 | #include "Operands.h" | |
| 34 | #include <wtf/OwnPtr.h> | |
| 35 | #include <wtf/Vector.h> | |
| 36 | ||
| 37 | namespace JSC { namespace DFG { | |
| 38 | ||
| 39 | typedef Vector <BlockIndex, 2> PredecessorList; | |
| 40 | ||
| 41 | struct BasicBlock : Vector<NodeIndex, 8> { | |
| 42 | BasicBlock(unsigned bytecodeBegin, unsigned numArguments, unsigned numLocals) | |
| 43 | : bytecodeBegin(bytecodeBegin) | |
| 44 | , isOSRTarget(false) | |
| 45 | , cfaHasVisited(false) | |
| 46 | , cfaShouldRevisit(false) | |
| 47 | #if !ASSERT_DISABLED | |
| 48 | , isLinked(false) | |
| 49 | #endif | |
| 50 | , isReachable(false) | |
| 51 | , variablesAtHead(numArguments, numLocals) | |
| 52 | , variablesAtTail(numArguments, numLocals) | |
| 53 | , valuesAtHead(numArguments, numLocals) | |
| 54 | , valuesAtTail(numArguments, numLocals) | |
| 55 | { | |
| 56 | } | |
| 57 | ||
| 58 | void ensureLocals(unsigned newNumLocals) | |
| 59 | { | |
| 60 | variablesAtHead.ensureLocals(newNumLocals); | |
| 61 | variablesAtTail.ensureLocals(newNumLocals); | |
| 62 | valuesAtHead.ensureLocals(newNumLocals); | |
| 63 | valuesAtTail.ensureLocals(newNumLocals); | |
| 64 | } | |
| 65 | ||
| 66 | // This value is used internally for block linking and OSR entry. It is mostly meaningless | |
| 67 | // for other purposes due to inlining. | |
| 68 | unsigned bytecodeBegin; | |
| 69 | ||
| 70 | bool isOSRTarget; | |
| 71 | bool cfaHasVisited; | |
| 72 | bool cfaShouldRevisit; | |
| 73 | #if !ASSERT_DISABLED | |
| 74 | bool isLinked; | |
| 75 | #endif | |
| 76 | bool isReachable; | |
| 77 | ||
| 78 | Vector<NodeIndex> phis; | |
| 79 | PredecessorList m_predecessors; | |
| 80 | ||
| 81 | Operands<NodeIndex, NodeIndexTraits> variablesAtHead; | |
| 82 | Operands<NodeIndex, NodeIndexTraits> variablesAtTail; | |
| 83 | ||
| 84 | Operands<AbstractValue> valuesAtHead; | |
| 85 | Operands<AbstractValue> valuesAtTail; | |
| 86 | }; | |
| 87 | ||
| 88 | struct UnlinkedBlock { | |
| 89 | BlockIndex m_blockIndex; | |
| 90 | bool m_needsNormalLinking; | |
| 91 | bool m_needsEarlyReturnLinking; | |
| 92 | ||
| 93 | UnlinkedBlock() { } | |
| 94 | ||
| 95 | explicit UnlinkedBlock(BlockIndex blockIndex) | |
| 96 | : m_blockIndex(blockIndex) | |
| 97 | , m_needsNormalLinking(true) | |
| 98 | , m_needsEarlyReturnLinking(false) | |
| 99 | { | |
| 100 | } | |
| 101 | }; | |
| 102 | ||
| 103 | } } // namespace JSC::DFG | |
| 104 | ||
| 105 | #endif // ENABLE(DFG_JIT) | |
| 106 | ||
| 107 | #endif // DFGBasicBlock_h | |
| 108 |