llvm-6502/include/llvm/Instruction.h
Chris Lattner 01c7f6d1c7 Remove obsolete, confusing, method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3175 91177308-0d34-0410-b5e6-96231b3b80d8
2002-07-31 01:45:02 +00:00

126 lines
4.4 KiB
C++

//===-- llvm/Instruction.h - Instruction class definition --------*- C++ -*--=//
//
// This file contains the declaration of the Instruction class, which is the
// base class for all of the VM instructions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_INSTRUCTION_H
#define LLVM_INSTRUCTION_H
#include "llvm/User.h"
template<typename SC> struct ilist_traits;
template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
typename SubClass> class SymbolTableListTraits;
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<Instruction, BasicBlock, Function,
ilist_traits<Instruction> >;
inline void setParent(BasicBlock *P) { Parent = P; }
protected:
unsigned iType; // InstructionType
public:
Instruction(const Type *Ty, unsigned iType, const std::string &Name = "");
virtual ~Instruction() {
assert(Parent == 0 && "Instruction still embedded in basic block!");
}
// Specialize setName to handle symbol table majik...
virtual void setName(const std::string &name, SymbolTable *ST = 0);
// clone() - Create a copy of 'this' instruction that is identical in all ways
// except the following:
// * The instruction has no parent
// * The instruction has no name
//
virtual Instruction *clone() const = 0;
// 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; }
virtual bool hasSideEffects() const { return false; } // Memory & Call insts
// ---------------------------------------------------------------------------
// Subclass classification... getOpcode() returns a member of
// one of the enums that is coming soon (down below)...
//
unsigned getOpcode() const { return iType; }
virtual const char *getOpcodeName() const {
return getOpcodeName(getOpcode());
}
static const char* getOpcodeName(unsigned OpCode);
inline bool isTerminator() const { // Instance of TerminatorInst?
return iType >= FirstTermOp && iType < NumTermOps;
}
inline bool isUnaryOp() const {
return iType >= FirstUnaryOp && iType < NumUnaryOps;
}
inline bool isBinaryOp() const {
return iType >= FirstBinaryOp && iType < NumBinaryOps;
}
virtual void print(std::ostream &OS) 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 Value *V) {
return V->getValueType() == Value::InstructionVal;
}
//----------------------------------------------------------------------
// Exported enumerations...
//
enum TermOps { // These terminate basic blocks
#define FIRST_TERM_INST(N) FirstTermOp = N,
#define HANDLE_TERM_INST(N, OPC, CLASS) OPC = N,
#define LAST_TERM_INST(N) NumTermOps = N+1,
#include "llvm/Instruction.def"
};
enum UnaryOps {
#define FIRST_UNARY_INST(N) FirstUnaryOp = N,
#define HANDLE_UNARY_INST(N, OPC, CLASS) OPC = N,
#define LAST_UNARY_INST(N) NumUnaryOps = N+1,
#include "llvm/Instruction.def"
};
enum BinaryOps {
#define FIRST_BINARY_INST(N) FirstBinaryOp = N,
#define HANDLE_BINARY_INST(N, OPC, CLASS) OPC = N,
#define LAST_BINARY_INST(N) NumBinaryOps = N+1,
#include "llvm/Instruction.def"
};
enum MemoryOps {
#define FIRST_MEMORY_INST(N) FirstMemoryOp = N,
#define HANDLE_MEMORY_INST(N, OPC, CLASS) OPC = N,
#define LAST_MEMORY_INST(N) NumMemoryOps = N+1,
#include "llvm/Instruction.def"
};
enum OtherOps {
#define FIRST_OTHER_INST(N) FirstOtherOp = N,
#define HANDLE_OTHER_INST(N, OPC, CLASS) OPC = N,
#define LAST_OTHER_INST(N) NumOtherOps = N+1,
#include "llvm/Instruction.def"
};
};
#endif