X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FInstruction.h;h=89e3e2349987b70d5fd25dff3ce4e347e061a228;hb=4b84086e89d86fb16f562166d9fea8df37db6be7;hp=ce7596990246a43b44050ac2368d73c979410190;hpb=5c7e326585f3a543388ba871c3425f7664cd9143;p=oota-llvm.git diff --git a/include/llvm/Instruction.h b/include/llvm/Instruction.h index ce759699024..89e3e234998 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. // //===----------------------------------------------------------------------===// // @@ -20,11 +20,9 @@ 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 @@ -36,29 +34,25 @@ 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; + /// 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 @@ -71,6 +65,23 @@ 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; + + /// 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());} @@ -81,13 +92,6 @@ public: 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. /// @@ -98,6 +102,10 @@ public: /// void eraseFromParent(); + /// insertBefore - Insert an unlinked instructions into a basic block + /// immediately before the specified instruction. + void insertBefore(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. @@ -107,22 +115,40 @@ public: /// Subclass classification... getOpcode() returns a member of /// one of the enums that is coming soon (down below)... /// - unsigned getOpcode() const { return getValueType() - InstructionVal; } - 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; } - inline bool isBinaryOp() const { - 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; + } + + /// isLogicalShift - Return true if this is a logical shift left or a logical + /// shift right. + inline bool isLogicalShift() const { + return getOpcode() == Shl || getOpcode() == LShr; + } + + /// isLogicalShift - Return true if this is a logical shift left or a logical + /// shift right. + inline bool isArithmeticShift() const { + return getOpcode() == AShr; } /// @brief Determine if the OpCode is one of the CastInst instructions. @@ -130,11 +156,6 @@ public: 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 @@ -155,12 +176,6 @@ public: bool isCommutative() const { return isCommutative(getOpcode()); } static bool isCommutative(unsigned op); - /// isComparison - Return true if the instruction is a Set* instruction: - /// - bool isComparison() const { return isComparison(getOpcode()); } - static bool isComparison(unsigned op); - - /// isTrappingInstruction - Return true if the instruction may trap. /// bool isTrapping() const { @@ -175,7 +190,7 @@ public: /// 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; } //---------------------------------------------------------------------- @@ -215,6 +230,14 @@ public: #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