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118 lines
4.1 KiB
C++
118 lines
4.1 KiB
C++
//===-- llvm/Instruction.h - Instruction class definition -------*- C++ -*-===//
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//
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// This file contains the declaration of the Instruction class, which is the
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// base class for all of the LLVM instructions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_INSTRUCTION_H
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#define LLVM_INSTRUCTION_H
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#include "llvm/User.h"
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template<typename SC> struct ilist_traits;
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template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
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typename SubClass> class SymbolTableListTraits;
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class Instruction : public User {
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BasicBlock *Parent;
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Instruction *Prev, *Next; // Next and Prev links for our intrusive linked list
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void setNext(Instruction *N) { Next = N; }
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void setPrev(Instruction *N) { Prev = N; }
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friend class SymbolTableListTraits<Instruction, BasicBlock, Function,
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ilist_traits<Instruction> >;
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void setParent(BasicBlock *P);
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protected:
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unsigned iType; // InstructionType: The opcode of the instruction
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Instruction(const Type *Ty, unsigned iType, const std::string &Name = "",
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Instruction *InsertBefore = 0);
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public:
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virtual ~Instruction() {
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assert(Parent == 0 && "Instruction still embedded in basic block!");
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}
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// Specialize setName to handle symbol table majik...
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virtual void setName(const std::string &name, SymbolTable *ST = 0);
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/// clone() - Create a copy of 'this' instruction that is identical in all
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/// ways except the following:
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/// * The instruction has no parent
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/// * The instruction has no name
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///
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virtual Instruction *clone() const = 0;
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// Accessor methods...
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//
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inline const BasicBlock *getParent() const { return Parent; }
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inline BasicBlock *getParent() { return Parent; }
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// getNext/Prev - Return the next or previous instruction in the list. The
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// last node in the list is a terminator instruction.
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Instruction *getNext() { return Next; }
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const Instruction *getNext() const { return Next; }
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Instruction *getPrev() { return Prev; }
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const Instruction *getPrev() const { return Prev; }
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virtual bool hasSideEffects() const { return false; } // Memory & Call insts
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// ---------------------------------------------------------------------------
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/// Subclass classification... getOpcode() returns a member of
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/// one of the enums that is coming soon (down below)...
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///
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unsigned getOpcode() const { return iType; }
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virtual const char *getOpcodeName() const {
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return getOpcodeName(getOpcode());
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}
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static const char* getOpcodeName(unsigned OpCode);
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inline bool isTerminator() const { // Instance of TerminatorInst?
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return iType >= TermOpsBegin && iType < TermOpsEnd;
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}
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inline bool isBinaryOp() const {
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return iType >= BinaryOpsBegin && iType < BinaryOpsEnd;
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}
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virtual void print(std::ostream &OS) const;
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const Instruction *I) { return true; }
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static inline bool classof(const Value *V) {
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return V->getValueType() == Value::InstructionVal;
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}
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//----------------------------------------------------------------------
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// Exported enumerations...
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//
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enum TermOps { // These terminate basic blocks
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#define FIRST_TERM_INST(N) TermOpsBegin = N,
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#define HANDLE_TERM_INST(N, OPC, CLASS) OPC = N,
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#define LAST_TERM_INST(N) TermOpsEnd = N+1,
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#include "llvm/Instruction.def"
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};
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enum BinaryOps {
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#define FIRST_BINARY_INST(N) BinaryOpsBegin = N,
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#define HANDLE_BINARY_INST(N, OPC, CLASS) OPC = N,
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#define LAST_BINARY_INST(N) BinaryOpsEnd = N+1,
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#include "llvm/Instruction.def"
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};
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enum MemoryOps {
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#define FIRST_MEMORY_INST(N) MemoryOpsBegin = N,
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#define HANDLE_MEMORY_INST(N, OPC, CLASS) OPC = N,
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#define LAST_MEMORY_INST(N) MemoryOpsEnd = N+1,
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#include "llvm/Instruction.def"
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};
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enum OtherOps {
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#define FIRST_OTHER_INST(N) OtherOpsBegin = N,
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#define HANDLE_OTHER_INST(N, OPC, CLASS) OPC = N,
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#define LAST_OTHER_INST(N) OtherOpsEnd = N+1,
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#include "llvm/Instruction.def"
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};
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};
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#endif
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