///
class TerminatorInst : public Instruction {
protected:
- TerminatorInst(Instruction::TermOps iType, Use *Ops, unsigned NumOps,
- Instruction *InsertBefore = 0);
TerminatorInst(const Type *Ty, Instruction::TermOps iType,
- Use *Ops, unsigned NumOps,
- const std::string &Name = "", Instruction *InsertBefore = 0)
- : Instruction(Ty, iType, Ops, NumOps, Name, InsertBefore) {}
+ Use *Ops, unsigned NumOps,
+ Instruction *InsertBefore = 0)
+ : Instruction(Ty, iType, Ops, NumOps, InsertBefore) {}
- TerminatorInst(Instruction::TermOps iType, Use *Ops, unsigned NumOps,
- BasicBlock *InsertAtEnd);
TerminatorInst(const Type *Ty, Instruction::TermOps iType,
- Use *Ops, unsigned NumOps,
- const std::string &Name, BasicBlock *InsertAtEnd)
- : Instruction(Ty, iType, Ops, NumOps, Name, InsertAtEnd) {}
+ Use *Ops, unsigned NumOps, BasicBlock *InsertAtEnd)
+ : Instruction(Ty, iType, Ops, NumOps, InsertAtEnd) {}
// Out of line virtual method, so the vtable, etc has a home.
~TerminatorInst();
class UnaryInstruction : public Instruction {
Use Op;
protected:
- UnaryInstruction(const Type *Ty, unsigned iType, Value *V,
- const std::string &Name = "", Instruction *IB = 0)
- : Instruction(Ty, iType, &Op, 1, Name, IB), Op(V, this) {
+ UnaryInstruction(const Type *Ty, unsigned iType, Value *V, Instruction *IB =0)
+ : Instruction(Ty, iType, &Op, 1, IB), Op(V, this) {
}
- UnaryInstruction(const Type *Ty, unsigned iType, Value *V,
- const std::string &Name, BasicBlock *IAE)
- : Instruction(Ty, iType, &Op, 1, Name, IAE), Op(V, this) {
+ UnaryInstruction(const Type *Ty, unsigned iType, Value *V, BasicBlock *IAE)
+ : Instruction(Ty, iType, &Op, 1, IAE), Op(V, this) {
}
public:
// Out of line virtual method, so the vtable, etc has a home.
protected:
void init(BinaryOps iType);
BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
- const std::string &Name, Instruction *InsertBefore)
- : Instruction(Ty, iType, Ops, 2, Name, InsertBefore) {
- Ops[0].init(S1, this);
- Ops[1].init(S2, this);
- init(iType);
- }
+ const std::string &Name, Instruction *InsertBefore);
BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
- const std::string &Name, BasicBlock *InsertAtEnd)
- : Instruction(Ty, iType, Ops, 2, Name, InsertAtEnd) {
- Ops[0].init(S1, this);
- Ops[1].init(S2, this);
- init(iType);
- }
-
+ const std::string &Name, BasicBlock *InsertAtEnd);
public:
/// Transparently provide more efficient getOperand methods.
}
};
+//===----------------------------------------------------------------------===//
+// CastInst Class
+//===----------------------------------------------------------------------===//
+
+/// CastInst - This is the base class for all instructions that perform data
+/// casts. It is simply provided so that instruction category testing
+/// can be performed with code like:
+///
+/// if (isa<CastInst>(Instr)) { ... }
+/// @brief Base class of casting instructions.
+class CastInst : public UnaryInstruction {
+ /// @brief Copy constructor
+ CastInst(const CastInst &CI)
+ : UnaryInstruction(CI.getType(), CI.getOpcode(), CI.getOperand(0)) {
+ }
+ /// @brief Do not allow default construction
+ CastInst();
+protected:
+ /// @brief Constructor with insert-before-instruction semantics for subclasses
+ CastInst(const Type *Ty, unsigned iType, Value *S,
+ const std::string &Name = "", Instruction *InsertBefore = 0)
+ : UnaryInstruction(Ty, iType, S, InsertBefore) {
+ setName(Name);
+ }
+ /// @brief Constructor with insert-at-end-of-block semantics for subclasses
+ CastInst(const Type *Ty, unsigned iType, Value *S,
+ const std::string &Name, BasicBlock *InsertAtEnd)
+ : UnaryInstruction(Ty, iType, S, InsertAtEnd) {
+ setName(Name);
+ }
+public:
+ /// Provides a way to construct any of the CastInst subclasses using an
+ /// opcode instead of the subclass's constructor. The opcode must be in the
+ /// CastOps category (Instruction::isCast(opcode) returns true). This
+ /// constructor has insert-before-instruction semantics to automatically
+ /// insert the new CastInst before InsertBefore (if it is non-null).
+ /// @brief Construct any of the CastInst subclasses
+ static CastInst *create(
+ Instruction::CastOps, ///< The opcode of the cast instruction
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which cast should be made
+ const std::string &Name = "", ///< Name for the instruction
+ Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ );
+ /// Provides a way to construct any of the CastInst subclasses using an
+ /// opcode instead of the subclass's constructor. The opcode must be in the
+ /// CastOps category. This constructor has insert-at-end-of-block semantics
+ /// to automatically insert the new CastInst at the end of InsertAtEnd (if
+ /// its non-null).
+ /// @brief Construct any of the CastInst subclasses
+ static CastInst *create(
+ Instruction::CastOps, ///< The opcode for the cast instruction
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which operand is casted
+ const std::string &Name, ///< The name for the instruction
+ BasicBlock *InsertAtEnd ///< The block to insert the instruction into
+ );
+
+ /// @brief Create a ZExt or BitCast cast instruction
+ static CastInst *createZExtOrBitCast(
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which cast should be made
+ const std::string &Name = "", ///< Name for the instruction
+ Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ );
+
+ /// @brief Create a ZExt or BitCast cast instruction
+ static CastInst *createZExtOrBitCast(
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which operand is casted
+ const std::string &Name, ///< The name for the instruction
+ BasicBlock *InsertAtEnd ///< The block to insert the instruction into
+ );
+
+ /// @brief Create a SExt or BitCast cast instruction
+ static CastInst *createSExtOrBitCast(
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which cast should be made
+ const std::string &Name = "", ///< Name for the instruction
+ Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ );
+
+ /// @brief Create a BitCast or a PtrToInt cast instruction
+ static CastInst *createPointerCast(
+ Value *S, ///< The pointer value to be casted (operand 0)
+ const Type *Ty, ///< The type to which operand is casted
+ const std::string &Name, ///< The name for the instruction
+ BasicBlock *InsertAtEnd ///< The block to insert the instruction into
+ );
+
+ /// @brief Create a BitCast or a PtrToInt cast instruction
+ static CastInst *createPointerCast(
+ Value *S, ///< The pointer value to be casted (operand 0)
+ const Type *Ty, ///< The type to which cast should be made
+ const std::string &Name = "", ///< Name for the instruction
+ Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ );
+
+ /// @brief Create a ZExt, BitCast, or Trunc for int -> int casts.
+ static CastInst *createIntegerCast(
+ Value *S, ///< The pointer value to be casted (operand 0)
+ const Type *Ty, ///< The type to which cast should be made
+ bool isSigned, ///< Whether to regard S as signed or not
+ const std::string &Name = "", ///< Name for the instruction
+ Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ );
+
+ /// @brief Create a ZExt, BitCast, or Trunc for int -> int casts.
+ static CastInst *createIntegerCast(
+ Value *S, ///< The integer value to be casted (operand 0)
+ const Type *Ty, ///< The integer type to which operand is casted
+ bool isSigned, ///< Whether to regard S as signed or not
+ const std::string &Name, ///< The name for the instruction
+ BasicBlock *InsertAtEnd ///< The block to insert the instruction into
+ );
+
+ /// @brief Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
+ static CastInst *createFPCast(
+ Value *S, ///< The floating point value to be casted
+ const Type *Ty, ///< The floating point type to cast to
+ const std::string &Name = "", ///< Name for the instruction
+ Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ );
+
+ /// @brief Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
+ static CastInst *createFPCast(
+ Value *S, ///< The floating point value to be casted
+ const Type *Ty, ///< The floating point type to cast to
+ const std::string &Name, ///< The name for the instruction
+ BasicBlock *InsertAtEnd ///< The block to insert the instruction into
+ );
+
+ /// @brief Create a SExt or BitCast cast instruction
+ static CastInst *createSExtOrBitCast(
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which operand is casted
+ const std::string &Name, ///< The name for the instruction
+ BasicBlock *InsertAtEnd ///< The block to insert the instruction into
+ );
+
+ /// @brief Create a Trunc or BitCast cast instruction
+ static CastInst *createTruncOrBitCast(
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which cast should be made
+ const std::string &Name = "", ///< Name for the instruction
+ Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ );
+
+ /// @brief Create a Trunc or BitCast cast instruction
+ static CastInst *createTruncOrBitCast(
+ Value *S, ///< The value to be casted (operand 0)
+ const Type *Ty, ///< The type to which operand is casted
+ const std::string &Name, ///< The name for the instruction
+ BasicBlock *InsertAtEnd ///< The block to insert the instruction into
+ );
+
+ /// Returns the opcode necessary to cast Val into Ty using usual casting
+ /// rules.
+ /// @brief Infer the opcode for cast operand and type
+ static Instruction::CastOps getCastOpcode(
+ const Value *Val, ///< The value to cast
+ bool SrcIsSigned, ///< Whether to treat the source as signed
+ const Type *Ty, ///< The Type to which the value should be casted
+ bool DstIsSigned ///< Whether to treate the dest. as signed
+ );
+
+ /// There are several places where we need to know if a cast instruction
+ /// only deals with integer source and destination types. To simplify that
+ /// logic, this method is provided.
+ /// @returns true iff the cast has only integral typed operand and dest type.
+ /// @brief Determine if this is an integer-only cast.
+ bool isIntegerCast() const;
+
+ /// A lossless cast is one that does not alter the basic value. It implies
+ /// a no-op cast but is more stringent, preventing things like int->float,
+ /// long->double, int->ptr, or packed->anything.
+ /// @returns true iff the cast is lossless.
+ /// @brief Determine if this is a lossless cast.
+ bool isLosslessCast() const;
+
+ /// A no-op cast is one that can be effected without changing any bits.
+ /// It implies that the source and destination types are the same size. The
+ /// IntPtrTy argument is used to make accurate determinations for casts
+ /// involving Integer and Pointer types. They are no-op casts if the integer
+ /// is the same size as the pointer. However, pointer size varies with
+ /// platform. Generally, the result of TargetData::getIntPtrType() should be
+ /// passed in. If that's not available, use Type::Int64Ty, which will make
+ /// the isNoopCast call conservative.
+ /// @brief Determine if this cast is a no-op cast.
+ bool isNoopCast(
+ const Type *IntPtrTy ///< Integer type corresponding to pointer
+ ) const;
+
+ /// Determine how a pair of casts can be eliminated, if they can be at all.
+ /// This is a helper function for both CastInst and ConstantExpr.
+ /// @returns 0 if the CastInst pair can't be eliminated
+ /// @returns Instruction::CastOps value for a cast that can replace
+ /// the pair, casting SrcTy to DstTy.
+ /// @brief Determine if a cast pair is eliminable
+ static unsigned isEliminableCastPair(
+ Instruction::CastOps firstOpcode, ///< Opcode of first cast
+ Instruction::CastOps secondOpcode, ///< Opcode of second cast
+ const Type *SrcTy, ///< SrcTy of 1st cast
+ const Type *MidTy, ///< DstTy of 1st cast & SrcTy of 2nd cast
+ const Type *DstTy, ///< DstTy of 2nd cast
+ const Type *IntPtrTy ///< Integer type corresponding to Ptr types
+ );
+
+ /// @brief Return the opcode of this CastInst
+ Instruction::CastOps getOpcode() const {
+ return Instruction::CastOps(Instruction::getOpcode());
+ }
+
+ /// @brief Return the source type, as a convenience
+ const Type* getSrcTy() const { return getOperand(0)->getType(); }
+ /// @brief Return the destination type, as a convenience
+ const Type* getDestTy() const { return getType(); }
+
+ /// This method can be used to determine if a cast from S to DstTy using
+ /// Opcode op is valid or not.
+ /// @returns true iff the proposed cast is valid.
+ /// @brief Determine if a cast is valid without creating one.
+ static bool castIsValid(Instruction::CastOps op, Value *S, const Type *DstTy);
+
+ /// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
+ static inline bool classof(const CastInst *) { return true; }
+ static inline bool classof(const Instruction *I) {
+ return I->getOpcode() >= CastOpsBegin && I->getOpcode() < CastOpsEnd;
+ }
+ static inline bool classof(const Value *V) {
+ return isa<Instruction>(V) && classof(cast<Instruction>(V));
+ }
+};
+
//===----------------------------------------------------------------------===//
// CmpInst Class
//===----------------------------------------------------------------------===//
/// @brief Implement superclass method.
virtual CmpInst *clone() const;
+ /// @brief Get the opcode casted to the right type
+ OtherOps getOpcode() const {
+ return static_cast<OtherOps>(Instruction::getOpcode());
+ }
+
/// The predicate for CmpInst is defined by the subclasses but stored in
/// the SubclassData field (see Value.h). We allow it to be fetched here
/// as the predicate but there is no enum type for it, just the raw unsigned
unsigned getNumOperands() const { return 2; }
/// This is just a convenience that dispatches to the subclasses.
- /// @brief Swap the operands.
+ /// @brief Swap the operands and adjust predicate accordingly to retain
+ /// the same comparison.
void swapOperands();
/// This is just a convenience that dispatches to the subclasses.
/// @brief Determine if this is an equals/not equals predicate.
bool isEquality();
+ /// @returns true if the predicate is unsigned, false otherwise.
+ /// @brief Determine if the predicate is an unsigned operation.
+ static bool isUnsigned(unsigned short predicate);
+
+ /// @returns true if the predicate is signed, false otherwise.
+ /// @brief Determine if the predicate is an signed operation.
+ static bool isSigned(unsigned short predicate);
+
+ /// @brief Determine if the predicate is an ordered operation.
+ static bool isOrdered(unsigned short predicate);
+
+ /// @brief Determine if the predicate is an unordered operation.
+ static bool isUnordered(unsigned short predicate);
+
/// @brief Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const CmpInst *) { return true; }
static inline bool classof(const Instruction *I) {
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