X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FInstruction.h;h=8da89e2f3893abf51b2f125454bf9d12c9280daf;hb=80a75bfae980df96f969f1c05b0c4a80ce975240;hp=dd73213878f5d9f189dc299ca9a5c9f56a359cb8;hpb=70aa33ee37fede7fb84de02daa38557ffd366458;p=oota-llvm.git diff --git a/include/llvm/Instruction.h b/include/llvm/Instruction.h index dd73213878f..8da89e2f389 100644 --- a/include/llvm/Instruction.h +++ b/include/llvm/Instruction.h @@ -22,9 +22,8 @@ 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 @@ -36,28 +35,20 @@ class Instruction : public User { 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: // 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: @@ -71,19 +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. /// @@ -103,7 +101,7 @@ public: /// Subclass classification... getOpcode() returns a member of /// one of the enums that is coming soon (down below)... /// - unsigned getOpcode() const { return getValueType() - InstructionVal; } + unsigned getOpcode() const { return getValueID() - InstructionVal; } const char *getOpcodeName() const { return getOpcodeName(getOpcode()); } @@ -121,6 +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 @@ -141,12 +170,6 @@ 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 { @@ -155,12 +178,13 @@ public: 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 *) { return true; } static inline bool classof(const Value *V) { - return V->getValueType() >= Value::InstructionVal; + return V->getValueID() >= Value::InstructionVal; } //---------------------------------------------------------------------- @@ -187,12 +211,27 @@ 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, #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