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124 lines
3.7 KiB
C++
124 lines
3.7 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 VM 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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class Type;
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class BasicBlock;
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class Method;
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class Instruction : public User {
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BasicBlock *Parent;
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unsigned iType; // InstructionType
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friend class ValueHolder<Instruction,BasicBlock>;
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inline void setParent(BasicBlock *P) { Parent = P; }
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public:
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Instruction(const Type *Ty, unsigned iType, const string &Name = "");
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virtual ~Instruction(); // Virtual dtor == good.
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// Specialize setName to handle symbol table majik...
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virtual void setName(const string &name);
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// clone() - Create a copy of 'this' instruction that is identical in all ways
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// 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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bool hasSideEffects() const { return false; } // Memory & Call insts = true
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// ---------------------------------------------------------------------------
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// Subclass classification... getInstType() 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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virtual const char *getOpcodeName() const = 0;
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unsigned getOpcode() const { return iType; }
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// getInstType is deprecated, use getOpcode() instead.
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unsigned getInstType() const { return iType; }
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inline bool isTerminator() const { // Instance of TerminatorInst?
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return iType >= FirstTermOp && iType < NumTermOps;
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}
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inline bool isDefinition() const { return !isTerminator(); }
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inline bool isUnaryOp() const {
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return iType >= FirstUnaryOp && iType < NumUnaryOps;
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}
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inline bool isBinaryOp() const {
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return iType >= FirstBinaryOp && iType < NumBinaryOps;
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}
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// isPHINode() - This is used frequently enough to allow it to exist
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inline bool isPHINode() const { return iType == PHINode; }
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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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FirstTermOp = 1,
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Ret = 1, Br, Switch,
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NumTermOps // Must remain at end of enum
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};
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enum UnaryOps {
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FirstUnaryOp = NumTermOps,
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Not = NumTermOps, // Binary inverse
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NumUnaryOps // Must remain at end of enum
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};
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enum BinaryOps {
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// Standard binary operators...
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FirstBinaryOp = NumUnaryOps,
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Add = NumUnaryOps, Sub, Mul, Div, Rem,
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// Logical operators...
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And, Or, Xor,
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// Binary comparison operators...
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SetEQ, SetNE, SetLE, SetGE, SetLT, SetGT,
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NumBinaryOps
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};
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enum MemoryOps {
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FirstMemoryOp = NumBinaryOps,
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Malloc = NumBinaryOps, Free, // Heap management instructions
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Alloca, // Stack management instruction
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Load, Store, // Memory manipulation instructions.
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GetElementPtr, // Get addr of Structure or Array element
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NumMemoryOps
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};
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enum OtherOps {
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FirstOtherOp = NumMemoryOps,
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PHINode = NumMemoryOps, // PHI node instruction
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Cast, // Type cast...
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Call, // Call a function
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Shl, Shr, // Shift operations...
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NumOps, // Must be the last 'op' defined.
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UserOp1, UserOp2 // May be used internally to a pass...
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};
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};
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#endif
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