typename SubClass> class SymbolTableListTraits;
class Instruction : public User {
+ void operator=(const Instruction &); // Do not implement
+ Instruction(const Instruction &); // Do not implement
+
BasicBlock *Parent;
Instruction *Prev, *Next; // Next and Prev links for our intrusive linked list
friend class SymbolTableListTraits<Instruction, BasicBlock, Function,
ilist_traits<Instruction> >;
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);
+ const std::string &Name, Instruction *InsertBefore = 0);
Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
const std::string &Name, BasicBlock *InsertAtEnd);
+ Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
+ const char *Name = 0, Instruction *InsertBefore = 0);
+ Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
+ const char *Name, BasicBlock *InsertAtEnd);
public:
-
- ~Instruction() {
- assert(Parent == 0 && "Instruction still linked in the program!");
- }
-
+ // 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; }
/// 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;
+
+ /// 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<Instruction>(*use_begin());}
+ const Instruction *use_back() const { return cast<Instruction>(*use_begin());}
+
// Accessor methods...
//
inline const BasicBlock *getParent() const { return Parent; }
/// one of the enums that is coming soon (down below)...
///
unsigned getOpcode() const { return getValueType() - InstructionVal; }
- virtual const char *getOpcodeName() const {
+ const char *getOpcodeName() const {
return getOpcodeName(getOpcode());
}
static const char* getOpcodeName(unsigned OpCode);
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;
+ }
+
+ /// @brief Determine if the instruction's opcode is one of the shift
+ /// instructions.
+ inline bool isShift() { return isShift(getOpcode()); }
+
+ /// isLogicalShift - Return true if this is a logical shift left or a logical
+ /// shift right.
+ inline bool isLogicalShift() {
+ return getOpcode() == Shl || getOpcode() == LShr;
+ }
+
+ /// isLogicalShift - Return true if this is a logical shift left or a logical
+ /// shift right.
+ inline bool isArithmeticShift() {
+ return getOpcode() == AShr;
+ }
+
+ /// @brief Determine if the OpCode is one of the CastInst instructions.
+ static inline bool isCast(unsigned OpCode) {
+ 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
bool isCommutative() const { return isCommutative(getOpcode()); }
static bool isCommutative(unsigned op);
- /// isRelational - Return true if the instruction is a Set* instruction:
- ///
- bool isRelational() const { return isRelational(getOpcode()); }
- static bool isRelational(unsigned op);
-
-
/// isTrappingInstruction - Return true if the instruction may trap.
///
bool isTrapping() const {
static bool isTrapping(unsigned op);
virtual void print(std::ostream &OS) const { print(OS, 0); }
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
#include "llvm/Instruction.def"
};
+ enum CastOps {
+#define FIRST_CAST_INST(N) CastOpsBegin = N,
+#define HANDLE_CAST_INST(N, OPC, CLASS) OPC = N,
+#define LAST_CAST_INST(N) CastOpsEnd = N+1
+#include "llvm/Instruction.def"
+ };
+
enum OtherOps {
#define FIRST_OTHER_INST(N) OtherOpsBegin = N,
#define HANDLE_OTHER_INST(N, OPC, CLASS) OPC = N,
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