X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FBasicBlock.h;h=108f43a7675eef58ad684060526a851ce9c1a2fa;hb=4b84086e89d86fb16f562166d9fea8df37db6be7;hp=7fcf8847bd52597c35a4861488d3096a94335ba4;hpb=bddcb9427cb36ac6609fef233eaac3c9b5e5a8f4;p=oota-llvm.git diff --git a/include/llvm/BasicBlock.h b/include/llvm/BasicBlock.h index 7fcf8847bd5..108f43a7675 100644 --- a/include/llvm/BasicBlock.h +++ b/include/llvm/BasicBlock.h @@ -2,13 +2,13 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // -// // This file contains the declaration of the BasicBlock class. +// //===----------------------------------------------------------------------===// #ifndef LLVM_BASICBLOCK_H @@ -16,7 +16,8 @@ #include "llvm/Instruction.h" #include "llvm/SymbolTableListTraits.h" -#include "llvm/ADT/ilist" +#include "llvm/ADT/ilist.h" +#include "llvm/Support/DataTypes.h" namespace llvm { @@ -25,11 +26,13 @@ template class SuccIterator; // Successor Iterator template class PredIterator; template<> struct ilist_traits - : public SymbolTableListTraits { + : public SymbolTableListTraits { // createSentinel is used to create a node that marks the end of the list... static Instruction *createSentinel(); static void destroySentinel(Instruction *I) { delete I; } static iplist &getList(BasicBlock *BB); + static ValueSymbolTable *getSymTab(BasicBlock *ItemParent); + static int getListOffset(); }; /// This represents a single basic block in LLVM. A basic block is simply a @@ -52,46 +55,61 @@ public: private : InstListType InstList; BasicBlock *Prev, *Next; // Next and Prev links for our intrusive linked list + Function *Parent; void setParent(Function *parent); void setNext(BasicBlock *N) { Next = N; } void setPrev(BasicBlock *N) { Prev = N; } - friend class SymbolTableListTraits; + friend class SymbolTableListTraits; BasicBlock(const BasicBlock &); // Do not implement void operator=(const BasicBlock &); // Do not implement + /// BasicBlock ctor - If the function parameter is specified, the basic block + /// is automatically inserted at either the end of the function (if + /// InsertBefore is null), or before the specified basic block. + /// + explicit BasicBlock(const std::string &Name = "", Function *Parent = 0, + BasicBlock *InsertBefore = 0); public: /// Instruction iterators... typedef InstListType::iterator iterator; typedef InstListType::const_iterator const_iterator; - /// BasicBlock ctor - If the function parameter is specified, the basic block - /// is automatically inserted at either the end of the function (if - /// InsertBefore is null), or before the specified basic block. - /// - BasicBlock(const std::string &Name = "", Function *Parent = 0, - BasicBlock *InsertBefore = 0); + // allocate space for exactly zero operands + static BasicBlock *Create(const std::string &Name = "", Function *Parent = 0, + BasicBlock *InsertBefore = 0) { + return new BasicBlock(Name, Parent, InsertBefore); + } ~BasicBlock(); /// getParent - Return the enclosing method, or null if none /// - const Function *getParent() const { return InstList.getParent(); } - Function *getParent() { return InstList.getParent(); } - - // getNext/Prev - Return the next or previous basic block in the list. - BasicBlock *getNext() { return Next; } - const BasicBlock *getNext() const { return Next; } - BasicBlock *getPrev() { return Prev; } - const BasicBlock *getPrev() const { return Prev; } + const Function *getParent() const { return Parent; } + Function *getParent() { return Parent; } + /// use_back - Specialize the methods defined in Value, as we know that an + /// BasicBlock can only be used by Instructions (specifically PHI and terms). + Instruction *use_back() { return cast(*use_begin());} + const Instruction *use_back() const { return cast(*use_begin());} + /// getTerminator() - If this is a well formed basic block, then this returns /// a pointer to the terminator instruction. If it is not, then you get a /// null pointer back. /// TerminatorInst *getTerminator(); - const TerminatorInst *const getTerminator() const; - + const TerminatorInst *getTerminator() const; + + /// Returns a pointer to the first instructon in this block that is not a + /// PHINode instruction. When adding instruction to the beginning of the + /// basic block, they should be added before the returned value, not before + /// the first instruction, which might be PHI. + /// Returns 0 is there's no non-PHI instruction. + Instruction* getFirstNonPHI(); + const Instruction* getFirstNonPHI() const { + return const_cast(this)->getFirstNonPHI(); + } + /// removeFromParent - This method unlinks 'this' from the containing /// function, but does not delete it. /// @@ -102,10 +120,14 @@ public: /// void eraseFromParent(); - /// moveBefore - Unlink this instruction from its current function and - /// insert it into the function that MovePos lives in, right before - /// MovePos. + /// moveBefore - Unlink this basic block from its current function and + /// insert it into the function that MovePos lives in, right before MovePos. void moveBefore(BasicBlock *MovePos); + + /// moveAfter - Unlink this basic block from its current function and + /// insert it into the function that MovePos lives in, right after MovePos. + void moveAfter(BasicBlock *MovePos); + /// getSinglePredecessor - If this basic block has a single predecessor block, /// return the block, otherwise return a null pointer. @@ -136,12 +158,13 @@ public: InstListType &getInstList() { return InstList; } virtual void print(std::ostream &OS) const { print(OS, 0); } + void print(std::ostream *OS) const { if (OS) print(*OS); } void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const; /// Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const BasicBlock *) { return true; } static inline bool classof(const Value *V) { - return V->getValueType() == Value::BasicBlockVal; + return V->getValueID() == Value::BasicBlockVal; } /// dropAllReferences() - This function causes all the subinstructions to "let @@ -175,8 +198,27 @@ public: /// the basic block). /// BasicBlock *splitBasicBlock(iterator I, const std::string &BBName = ""); + + + static unsigned getInstListOffset() { + BasicBlock *Obj = 0; + return unsigned(reinterpret_cast(&Obj->InstList)); + } + +private: + // getNext/Prev - Return the next or previous basic block in the list. Access + // these with Function::iterator. + BasicBlock *getNext() { return Next; } + const BasicBlock *getNext() const { return Next; } + BasicBlock *getPrev() { return Prev; } + const BasicBlock *getPrev() const { return Prev; } }; +inline int +ilist_traits::getListOffset() { + return BasicBlock::getInstListOffset(); +} + } // End llvm namespace #endif