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//===-- 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"
class Type;
class BasicBlock;
class Method;
class MachineInstr;
class MachineCodeForVMInstr;
class Instruction : public User {
BasicBlock *Parent;
unsigned iType; // InstructionType
MachineCodeForVMInstr* machineInstrVec;
friend class ValueHolder<Instruction,BasicBlock,Method>;
inline void setParent(BasicBlock *P) { Parent = P; }
public:
Instruction(const Type *Ty, unsigned iType, const string &Name = "");
virtual ~Instruction(); // Virtual dtor == good.
// Specialize setName to handle symbol table majik...
virtual void setName(const 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; }
virtual bool hasSideEffects() const { return false; } // Memory & Call insts
// ---------------------------------------------------------------------------
// Machine code accessors...
//
inline MachineCodeForVMInstr &getMachineInstrVec() const {
return *machineInstrVec;
}
// Add a machine instruction used to implement this instruction
//
void addMachineInstruction(MachineInstr* minstr);
// ---------------------------------------------------------------------------
// Subclass classification... getInstType() returns a member of
// one of the enums that is coming soon (down below)...
//
virtual const char *getOpcodeName() const = 0;
unsigned getOpcode() const { return iType; }
// getInstType is deprecated, use getOpcode() instead.
unsigned getInstType() const { return iType; }
inline bool isTerminator() const { // Instance of TerminatorInst?
return iType >= FirstTermOp && iType < NumTermOps;
}
inline bool isDefinition() const { return !isTerminator(); }
inline bool isUnaryOp() const {
return iType >= FirstUnaryOp && iType < NumUnaryOps;
}
inline bool isBinaryOp() const {
return iType >= FirstBinaryOp && iType < NumBinaryOps;
}
// isPHINode() - This is used frequently enough to allow it to exist
inline bool isPHINode() const { return iType == PHINode; }
// dropAllReferences() - This function is in charge of "letting go" of all
// objects that this Instruction refers to. This first lets go of all
// references to hidden values generated code for this instruction,
// and then drops all references to its operands.
//
void dropAllReferences();
//----------------------------------------------------------------------
// Exported enumerations...
//
enum TermOps { // These terminate basic blocks
FirstTermOp = 1,
Ret = 1, Br, Switch,
NumTermOps // Must remain at end of enum
};
enum UnaryOps {
FirstUnaryOp = NumTermOps,
Not = NumTermOps, // Binary inverse
NumUnaryOps // Must remain at end of enum
};
enum BinaryOps {
// Standard binary operators...
FirstBinaryOp = NumUnaryOps,
Add = NumUnaryOps, Sub, Mul, Div, Rem,
// Logical operators...
And, Or, Xor,
// Binary comparison operators...
SetEQ, SetNE, SetLE, SetGE, SetLT, SetGT,
NumBinaryOps
};
enum MemoryOps {
FirstMemoryOp = NumBinaryOps,
Malloc = NumBinaryOps, Free, // Heap management instructions
Alloca, // Stack management instruction
Load, Store, // Memory manipulation instructions.
GetElementPtr, // Get addr of Structure or Array element
NumMemoryOps
};
enum OtherOps {
FirstOtherOp = NumMemoryOps,
PHINode = NumMemoryOps, // PHI node instruction
Cast, // Type cast...
Call, // Call a function
Shl, Shr, // Shift operations...
NumOps, // Must be the last 'op' defined.
UserOp1, UserOp2 // May be used internally to a pass...
};
};
#endif
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