X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FInstruction.h;h=8da89e2f3893abf51b2f125454bf9d12c9280daf;hb=1a957d563fe894c797e0eba00bf069fbe7ecba77;hp=a7359731db7d513f77bd136acbb5efda4452c6d6;hpb=38f14553939e574becab6ea1e0b055d31293b0cf;p=oota-llvm.git diff --git a/include/llvm/Instruction.h b/include/llvm/Instruction.h index a7359731db7..8da89e2f389 100644 --- a/include/llvm/Instruction.h +++ b/include/llvm/Instruction.h @@ -1,10 +1,10 @@ //===-- llvm/Instruction.h - Instruction class definition -------*- C++ -*-===// -// +// // 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 contains the declaration of the Instruction class, which is the @@ -22,44 +22,33 @@ namespace llvm { struct AssemblyAnnotationWriter; class BinaryOperator; -template struct ilist_traits; -template class SymbolTableListTraits; +template + class SymbolTableListTraits; class Instruction : public User { + void operator=(const Instruction &); // Do not implement + Instruction(const Instruction &); // Do not implement + 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); - void init(); - -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, const std::string &Name = "", + Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps, Instruction *InsertBefore = 0); - Instruction(const Type *Ty, unsigned iType, const std::string &Name, + Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps, BasicBlock *InsertAtEnd); public: - - ~Instruction() { - assert(Parent == 0 && "Instruction still linked in the program!"); - } - - // Specialize setName to handle symbol table majik... - virtual void setName(const std::string &name, SymbolTable *ST = 0); + // 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; /// clone() - Create a copy of 'this' instruction that is identical in all /// ways except the following: @@ -73,19 +62,26 @@ public: /// extra information (e.g. load is volatile) agree. bool isIdenticalTo(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(Instruction *I) 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. /// @@ -96,12 +92,17 @@ public: /// void eraseFromParent(); + /// moveBefore - Unlink this instruction from its current basic block and + /// insert it into the basic block that MovePos lives in, right before + /// MovePos. + void moveBefore(Instruction *MovePos); + // --------------------------------------------------------------------------- - /// Subclass classification... getOpcode() returns a member of + /// 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 { + unsigned getOpcode() const { return getValueID() - InstructionVal; } + const char *getOpcodeName() const { return getOpcodeName(getOpcode()); } static const char* getOpcodeName(unsigned OpCode); @@ -118,6 +119,37 @@ public: return getOpcode() >= BinaryOpsBegin && getOpcode() < BinaryOpsEnd; } + /// @brief Determine if the Opcode is one of the shift instructions. + static inline bool isShift(unsigned Opcode) { + return Opcode >= Shl && Opcode <= AShr; + } + + /// @brief Determine if the instruction's opcode is one of the shift + /// instructions. + inline bool isShift() { return isShift(getOpcode()); } + + /// isLogicalShift - Return true if this is a logical shift left or a logical + /// shift right. + inline bool isLogicalShift() { + return getOpcode() == Shl || getOpcode() == LShr; + } + + /// isLogicalShift - Return true if this is a logical shift left or a logical + /// shift right. + inline bool isArithmeticShift() { + 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; + } + + /// @brief Determine if this is one of the CastInst instructions. + inline bool isCast() const { + return isCast(getOpcode()); + } + /// isAssociative - Return true if the instruction is associative: /// /// Associative operators satisfy: x op (y op z) === (x op y) op z @@ -138,58 +170,68 @@ 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. /// bool isTrapping() const { - return isTrapping(getOpcode()); + return isTrapping(getOpcode()); } static bool isTrapping(unsigned op); - + 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 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; } - + //---------------------------------------------------------------------- // Exported enumerations... // enum TermOps { // These terminate basic blocks #define FIRST_TERM_INST(N) TermOpsBegin = N, #define HANDLE_TERM_INST(N, OPC, CLASS) OPC = N, -#define LAST_TERM_INST(N) TermOpsEnd = N+1, +#define LAST_TERM_INST(N) TermOpsEnd = N+1 #include "llvm/Instruction.def" }; enum BinaryOps { #define FIRST_BINARY_INST(N) BinaryOpsBegin = N, #define HANDLE_BINARY_INST(N, OPC, CLASS) OPC = N, -#define LAST_BINARY_INST(N) BinaryOpsEnd = N+1, +#define LAST_BINARY_INST(N) BinaryOpsEnd = N+1 #include "llvm/Instruction.def" }; enum MemoryOps { #define FIRST_MEMORY_INST(N) MemoryOpsBegin = N, #define HANDLE_MEMORY_INST(N, OPC, CLASS) OPC = N, -#define LAST_MEMORY_INST(N) MemoryOpsEnd = N+1, +#define LAST_MEMORY_INST(N) MemoryOpsEnd = N+1 +#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, -#define LAST_OTHER_INST(N) OtherOpsEnd = N+1, +#define LAST_OTHER_INST(N) OtherOpsEnd = N+1 #include "llvm/Instruction.def" }; + +private: + // 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; } }; } // End llvm namespace