X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FInstruction.h;h=0a39b08461d65615138e87eb538eedbf8e0cbd19;hb=031b7481c818b7ad6f43ba942ed33663aef7f1b8;hp=ef6285261d06028e76afc6b9d5e8953c55def2f6;hpb=287921d1889e101cb7f5cfa031a34ebe53a9a4a0;p=oota-llvm.git diff --git a/include/llvm/Instruction.h b/include/llvm/Instruction.h index ef6285261d0..0a39b08461d 100644 --- a/include/llvm/Instruction.h +++ b/include/llvm/Instruction.h @@ -2,8 +2,8 @@ // // 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. // //===----------------------------------------------------------------------===// // @@ -16,48 +16,38 @@ #define LLVM_INSTRUCTION_H #include "llvm/User.h" +#include "llvm/ADT/ilist_node.h" namespace llvm { -struct AssemblyAnnotationWriter; -class BinaryOperator; +template + class SymbolTableListTraits; -template struct ilist_traits; -template class SymbolTableListTraits; +class Instruction : public User, public ilist_node { + void operator=(const Instruction &); // Do not implement + Instruction(const Instruction &); // Do not implement -class Instruction : public User { BasicBlock *Parent; - Instruction *Prev, *Next; // Next and Prev links for our intrusive linked list - void setNext(Instruction *N) { Next = N; } - void setPrev(Instruction *N) { Prev = N; } - - friend class SymbolTableListTraits >; + friend class SymbolTableListTraits; void setParent(BasicBlock *P); - -private: - // FIXME: This is a dirty hack. Setcc instructions shouldn't encode the CC - // into the opcode field. When they don't, this will be unneeded. - void setOpcode(unsigned NewOpcode); - friend class BinaryOperator; protected: Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps, - const std::string &Name = "", Instruction *InsertBefore = 0); Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps, - const std::string &Name, BasicBlock *InsertAtEnd); + BasicBlock *InsertAtEnd); public: - - ~Instruction() { - assert(Parent == 0 && "Instruction still linked in the program!"); - } - + // Out of line virtual method, so the vtable, etc has a home. + ~Instruction(); + /// mayWriteToMemory - Return true if this instruction may modify memory. /// - virtual bool mayWriteToMemory() const { return false; } + bool mayWriteToMemory() const; + /// mayReadFromMemory - Return true if this instruction may read memory. + /// + bool mayReadFromMemory() const; + /// clone() - Create a copy of 'this' instruction that is identical in all /// ways except the following: /// * The instruction has no parent @@ -68,21 +58,35 @@ public: /// isIdenticalTo - Return true if the specified instruction is exactly /// identical to the current one. This means that all operands match and any /// extra information (e.g. load is volatile) agree. - bool isIdenticalTo(Instruction *I) const; - - + bool isIdenticalTo(const Instruction *I) const; + + /// This function determines if the specified instruction executes the same + /// operation as the current one. This means that the opcodes, type, operand + /// types and any other factors affecting the operation must be the same. This + /// is similar to isIdenticalTo except the operands themselves don't have to + /// be identical. + /// @returns true if the specified instruction is the same operation as + /// the current one. + /// @brief Determine if one instruction is the same operation as another. + bool isSameOperationAs(const Instruction *I) const; + + /// isUsedOutsideOfBlock - Return true if there are any uses of this + /// instruction in blocks other than the specified block. Note that PHI nodes + /// are considered to evaluate their operands in the corresponding predecessor + /// block. + bool isUsedOutsideOfBlock(const BasicBlock *BB) const; + + + /// use_back - Specialize the methods defined in Value, as we know that an + /// instruction can only be used by other instructions. + Instruction *use_back() { return cast(*use_begin());} + const Instruction *use_back() const { return cast(*use_begin());} + // Accessor methods... // inline const BasicBlock *getParent() const { return Parent; } inline BasicBlock *getParent() { return Parent; } - // getNext/Prev - Return the next or previous instruction in the list. The - // last node in the list is a terminator instruction. - Instruction *getNext() { return Next; } - const Instruction *getNext() const { return Next; } - Instruction *getPrev() { return Prev; } - const Instruction *getPrev() const { return Prev; } - /// removeFromParent - This method unlinks 'this' from the containing basic /// block, but does not delete it. /// @@ -93,6 +97,14 @@ public: /// void eraseFromParent(); + /// insertBefore - Insert an unlinked instructions into a basic block + /// immediately before the specified instruction. + void insertBefore(Instruction *InsertPos); + + /// insertAfter - Insert an unlinked instructions into a basic block + /// immediately after the specified instruction. + void insertAfter(Instruction *InsertPos); + /// moveBefore - Unlink this instruction from its current basic block and /// insert it into the basic block that MovePos lives in, right before /// MovePos. @@ -102,22 +114,44 @@ public: /// Subclass classification... getOpcode() returns a member of /// one of the enums that is coming soon (down below)... /// - unsigned getOpcode() const { return getValueType() - InstructionVal; } - virtual const char *getOpcodeName() const { - return getOpcodeName(getOpcode()); - } + unsigned getOpcode() const { return getValueID() - InstructionVal; } + const char *getOpcodeName() const { return getOpcodeName(getOpcode()); } + bool isTerminator() const { return isTerminator(getOpcode()); } + bool isBinaryOp() const { return isBinaryOp(getOpcode()); } + bool isShift() { return isShift(getOpcode()); } + bool isCast() const { return isCast(getOpcode()); } + + + static const char* getOpcodeName(unsigned OpCode); static inline bool isTerminator(unsigned OpCode) { return OpCode >= TermOpsBegin && OpCode < TermOpsEnd; } - inline bool isTerminator() const { // Instance of TerminatorInst? - return isTerminator(getOpcode()); + static inline bool isBinaryOp(unsigned Opcode) { + return Opcode >= BinaryOpsBegin && Opcode < BinaryOpsEnd; + } + + /// @brief Determine if the Opcode is one of the shift instructions. + static inline bool isShift(unsigned Opcode) { + return Opcode >= Shl && Opcode <= AShr; } - inline bool isBinaryOp() const { - return getOpcode() >= BinaryOpsBegin && getOpcode() < BinaryOpsEnd; + /// isLogicalShift - Return true if this is a logical shift left or a logical + /// shift right. + inline bool isLogicalShift() const { + return getOpcode() == Shl || getOpcode() == LShr; + } + + /// isArithmeticShift - Return true if this is an arithmetic shift right. + inline bool isArithmeticShift() const { + return getOpcode() == AShr; + } + + /// @brief Determine if the OpCode is one of the CastInst instructions. + static inline bool isCast(unsigned OpCode) { + return OpCode >= CastOpsBegin && OpCode < CastOpsEnd; } /// isAssociative - Return true if the instruction is associative: @@ -140,26 +174,17 @@ public: bool isCommutative() const { return isCommutative(getOpcode()); } static bool isCommutative(unsigned op); - /// isRelational - Return true if the instruction is a Set* instruction: - /// - bool isRelational() const { return isRelational(getOpcode()); } - static bool isRelational(unsigned op); - - - /// isTrappingInstruction - Return true if the instruction may trap. + /// isTrapping - Return true if the instruction may trap. /// bool isTrapping() const { return isTrapping(getOpcode()); } static bool isTrapping(unsigned op); - virtual void print(std::ostream &OS) const { print(OS, 0); } - void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const; - /// Methods for support type inquiry through isa, cast, and dyn_cast: - static inline bool classof(const Instruction *I) { return true; } + static inline bool classof(const Instruction *) { return true; } static inline bool classof(const Value *V) { - return V->getValueType() >= Value::InstructionVal; + return V->getValueID() >= Value::InstructionVal; } //---------------------------------------------------------------------- @@ -186,6 +211,13 @@ public: #include "llvm/Instruction.def" }; + enum CastOps { +#define FIRST_CAST_INST(N) CastOpsBegin = N, +#define HANDLE_CAST_INST(N, OPC, CLASS) OPC = N, +#define LAST_CAST_INST(N) CastOpsEnd = N+1 +#include "llvm/Instruction.def" + }; + enum OtherOps { #define FIRST_OTHER_INST(N) OtherOpsBegin = N, #define HANDLE_OTHER_INST(N, OPC, CLASS) OPC = N, @@ -194,6 +226,18 @@ public: }; }; +// Instruction* is only 4-byte aligned. +template<> +class PointerLikeTypeTraits { + typedef Instruction* PT; +public: + static inline void *getAsVoidPointer(PT P) { return P; } + static inline PT getFromVoidPointer(void *P) { + return static_cast(P); + } + enum { NumLowBitsAvailable = 2 }; +}; + } // End llvm namespace #endif