-//===-- llvm/InstrTypes.h - Important Instruction subclasses -----*- C++ -*--=//
+//===-- llvm/InstrTypes.h - Important Instruction subclasses ----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file defines various meta classes of instructions that exist in the VM
-// representation. Specific concrete subclasses of these may be found in the
+// representation. Specific concrete subclasses of these may be found in the
// i*.h files...
//
//===----------------------------------------------------------------------===//
#include "llvm/Instruction.h"
+namespace llvm {
+
//===----------------------------------------------------------------------===//
// TerminatorInst Class
//===----------------------------------------------------------------------===//
-// TerminatorInst - Subclasses of this class are all able to terminate a basic
-// block. Thus, these are all the flow control type of operations.
-//
+/// TerminatorInst - Subclasses of this class are all able to terminate a basic
+/// block. Thus, these are all the flow control type of operations.
+///
class TerminatorInst : public Instruction {
protected:
- TerminatorInst(Instruction::TermOps iType);
TerminatorInst(const Type *Ty, Instruction::TermOps iType,
- const std::string &Name = "");
+ Use *Ops, unsigned NumOps,
+ Instruction *InsertBefore = 0)
+ : Instruction(Ty, iType, Ops, NumOps, InsertBefore) {}
+
+ TerminatorInst(const Type *Ty, Instruction::TermOps iType,
+ 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();
+
+ /// Virtual methods - Terminators should overload these and provide inline
+ /// overrides of non-V methods.
+ virtual BasicBlock *getSuccessorV(unsigned idx) const = 0;
+ virtual unsigned getNumSuccessorsV() const = 0;
+ virtual void setSuccessorV(unsigned idx, BasicBlock *B) = 0;
public:
- // Terminators must implement the methods required by Instruction...
virtual Instruction *clone() const = 0;
- virtual const char *getOpcodeName() const = 0;
-
- // Additionally, they must provide a method to get at the successors of this
- // terminator instruction. 'idx' may not be >= the number of successors
- // returned by getNumSuccessors()!
- //
- virtual const BasicBlock *getSuccessor(unsigned idx) const = 0;
- virtual unsigned getNumSuccessors() const = 0;
-
- // Set a successor at a given index
- virtual void setSuccessor(unsigned idx, BasicBlock *B) = 0;
- inline BasicBlock *getSuccessor(unsigned idx) {
- return (BasicBlock*)((const TerminatorInst *)this)->getSuccessor(idx);
+ /// getNumSuccessors - Return the number of successors that this terminator
+ /// has.
+ unsigned getNumSuccessors() const {
+ return getNumSuccessorsV();
+ }
+
+ /// getSuccessor - Return the specified successor.
+ ///
+ BasicBlock *getSuccessor(unsigned idx) const {
+ return getSuccessorV(idx);
+ }
+
+ /// setSuccessor - Update the specified successor to point at the provided
+ /// block.
+ void setSuccessor(unsigned idx, BasicBlock *B) {
+ setSuccessorV(idx, B);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const TerminatorInst *) { return true; }
static inline bool classof(const Instruction *I) {
- return I->getOpcode() >= FirstTermOp && I->getOpcode() < NumTermOps;
+ return I->getOpcode() >= TermOpsBegin && I->getOpcode() < TermOpsEnd;
}
static inline bool classof(const Value *V) {
return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
};
-
//===----------------------------------------------------------------------===//
-// UnaryOperator Class
+// UnaryInstruction Class
//===----------------------------------------------------------------------===//
-class UnaryOperator : public Instruction {
+class UnaryInstruction : public Instruction {
+ Use Op;
protected:
- UnaryOperator(Value *S, UnaryOps iType, const std::string &Name = "")
- : Instruction(S->getType(), iType, Name) {
- Operands.reserve(1);
- Operands.push_back(Use(S, 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, BasicBlock *IAE)
+ : Instruction(Ty, iType, &Op, 1, IAE), Op(V, this) {
}
public:
+ // Out of line virtual method, so the vtable, etc has a home.
+ ~UnaryInstruction();
+
+ // Transparently provide more efficient getOperand methods.
+ Value *getOperand(unsigned i) const {
+ assert(i == 0 && "getOperand() out of range!");
+ return Op;
+ }
+ void setOperand(unsigned i, Value *Val) {
+ assert(i == 0 && "setOperand() out of range!");
+ Op = Val;
+ }
+ unsigned getNumOperands() const { return 1; }
+};
- // create() - Construct a unary instruction, given the opcode
- // and its operand.
- //
- static UnaryOperator *create(UnaryOps Op, Value *Source);
+//===----------------------------------------------------------------------===//
+// BinaryOperator Class
+//===----------------------------------------------------------------------===//
- inline UnaryOps getOpcode() const {
- return (UnaryOps)Instruction::getOpcode();
+class BinaryOperator : public Instruction {
+ Use Ops[2];
+protected:
+ void init(BinaryOps iType);
+ BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
+ const std::string &Name, Instruction *InsertBefore);
+ BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
+ const std::string &Name, BasicBlock *InsertAtEnd);
+public:
+
+ /// Transparently provide more efficient getOperand methods.
+ Value *getOperand(unsigned i) const {
+ assert(i < 2 && "getOperand() out of range!");
+ return Ops[i];
+ }
+ void setOperand(unsigned i, Value *Val) {
+ assert(i < 2 && "setOperand() out of range!");
+ Ops[i] = Val;
+ }
+ unsigned getNumOperands() const { return 2; }
+
+ /// create() - Construct a binary instruction, given the opcode and the two
+ /// operands. Optionally (if InstBefore is specified) insert the instruction
+ /// into a BasicBlock right before the specified instruction. The specified
+ /// Instruction is allowed to be a dereferenced end iterator.
+ ///
+ static BinaryOperator *create(BinaryOps Op, Value *S1, Value *S2,
+ const std::string &Name = "",
+ Instruction *InsertBefore = 0);
+
+ /// create() - Construct a binary instruction, given the opcode and the two
+ /// operands. Also automatically insert this instruction to the end of the
+ /// BasicBlock specified.
+ ///
+ static BinaryOperator *create(BinaryOps Op, Value *S1, Value *S2,
+ const std::string &Name,
+ BasicBlock *InsertAtEnd);
+
+ /// create* - These methods just forward to create, and are useful when you
+ /// statically know what type of instruction you're going to create. These
+ /// helpers just save some typing.
+#define HANDLE_BINARY_INST(N, OPC, CLASS) \
+ static BinaryOperator *create##OPC(Value *V1, Value *V2, \
+ const std::string &Name = "") {\
+ return create(Instruction::OPC, V1, V2, Name);\
+ }
+#include "llvm/Instruction.def"
+#define HANDLE_BINARY_INST(N, OPC, CLASS) \
+ static BinaryOperator *create##OPC(Value *V1, Value *V2, \
+ const std::string &Name, BasicBlock *BB) {\
+ return create(Instruction::OPC, V1, V2, Name, BB);\
+ }
+#include "llvm/Instruction.def"
+#define HANDLE_BINARY_INST(N, OPC, CLASS) \
+ static BinaryOperator *create##OPC(Value *V1, Value *V2, \
+ const std::string &Name, Instruction *I) {\
+ return create(Instruction::OPC, V1, V2, Name, I);\
}
+#include "llvm/Instruction.def"
- virtual Instruction *clone() const {
- return create(getOpcode(), Operands[0]);
+
+ /// Helper functions to construct and inspect unary operations (NEG and NOT)
+ /// via binary operators SUB and XOR:
+ ///
+ /// createNeg, createNot - Create the NEG and NOT
+ /// instructions out of SUB and XOR instructions.
+ ///
+ static BinaryOperator *createNeg(Value *Op, const std::string &Name = "",
+ Instruction *InsertBefore = 0);
+ static BinaryOperator *createNeg(Value *Op, const std::string &Name,
+ BasicBlock *InsertAtEnd);
+ static BinaryOperator *createNot(Value *Op, const std::string &Name = "",
+ Instruction *InsertBefore = 0);
+ static BinaryOperator *createNot(Value *Op, const std::string &Name,
+ BasicBlock *InsertAtEnd);
+
+ /// isNeg, isNot - Check if the given Value is a NEG or NOT instruction.
+ ///
+ static bool isNeg(const Value *V);
+ static bool isNot(const Value *V);
+
+ /// getNegArgument, getNotArgument - Helper functions to extract the
+ /// unary argument of a NEG or NOT operation implemented via Sub or Xor.
+ ///
+ static const Value *getNegArgument(const Value *BinOp);
+ static Value *getNegArgument( Value *BinOp);
+ static const Value *getNotArgument(const Value *BinOp);
+ static Value *getNotArgument( Value *BinOp);
+
+ BinaryOps getOpcode() const {
+ return static_cast<BinaryOps>(Instruction::getOpcode());
}
- virtual const char *getOpcodeName() const = 0;
+ virtual BinaryOperator *clone() const;
+
+ /// swapOperands - Exchange the two operands to this instruction.
+ /// This instruction is safe to use on any binary instruction and
+ /// does not modify the semantics of the instruction. If the
+ /// instruction is order dependent (SetLT f.e.) the opcode is
+ /// changed. If the instruction cannot be reversed (ie, it's a Div),
+ /// then return true.
+ ///
+ bool swapOperands();
// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const UnaryOperator *) { return true; }
+ static inline bool classof(const BinaryOperator *) { return true; }
static inline bool classof(const Instruction *I) {
- return I->getOpcode() >= FirstUnaryOp && I->getOpcode() < NumUnaryOps;
+ return I->getOpcode() >= BinaryOpsBegin && I->getOpcode() < BinaryOpsEnd;
}
static inline bool classof(const Value *V) {
return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
};
+//===----------------------------------------------------------------------===//
+// 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 vector->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));
+ }
+};
//===----------------------------------------------------------------------===//
-// BinaryOperator Class
+// CmpInst Class
//===----------------------------------------------------------------------===//
-class BinaryOperator : public Instruction {
+/// This class is the base class for the comparison instructions.
+/// @brief Abstract base class of comparison instructions.
+class CmpInst: public Instruction {
+ CmpInst(); // do not implement
protected:
- BinaryOperator(BinaryOps iType, Value *S1, Value *S2,
- const std::string &Name = "")
- : Instruction(S1->getType(), iType, Name) {
- Operands.reserve(2);
- Operands.push_back(Use(S1, this));
- Operands.push_back(Use(S2, this));
- assert(Operands[0] && Operands[1] &&
- Operands[0]->getType() == Operands[1]->getType());
- }
+ CmpInst(Instruction::OtherOps op, unsigned short pred, Value *LHS, Value *RHS,
+ const std::string &Name = "", Instruction *InsertBefore = 0);
+
+ CmpInst(Instruction::OtherOps op, unsigned short pred, Value *LHS, Value *RHS,
+ const std::string &Name, BasicBlock *InsertAtEnd);
+
+ Use Ops[2]; // CmpInst instructions always have 2 operands, optimize
public:
+ /// Construct a compare instruction, given the opcode, the predicate and
+ /// the two operands. Optionally (if InstBefore is specified) insert the
+ /// instruction into a BasicBlock right before the specified instruction.
+ /// The specified Instruction is allowed to be a dereferenced end iterator.
+ /// @brief Create a CmpInst
+ static CmpInst *create(OtherOps Op, unsigned short predicate, Value *S1,
+ Value *S2, const std::string &Name = "",
+ Instruction *InsertBefore = 0);
- // create() - Construct a binary instruction, given the opcode
- // and the two operands.
- //
- static BinaryOperator *create(BinaryOps Op, Value *S1, Value *S2,
- const std::string &Name = "");
+ /// Construct a compare instruction, given the opcode, the predicate and the
+ /// two operands. Also automatically insert this instruction to the end of
+ /// the BasicBlock specified.
+ /// @brief Create a CmpInst
+ static CmpInst *create(OtherOps Op, unsigned short predicate, Value *S1,
+ Value *S2, const std::string &Name,
+ BasicBlock *InsertAtEnd);
+
+ /// @brief Get the opcode casted to the right type
+ OtherOps getOpcode() const {
+ return static_cast<OtherOps>(Instruction::getOpcode());
+ }
- inline BinaryOps getOpcode() const {
- return (BinaryOps)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
+ /// short. This facilitates comparison of CmpInst instances without delving
+ /// into the subclasses since predicate values are distinct between the
+ /// CmpInst subclasses.
+ /// @brief Return the predicate for this instruction.
+ unsigned short getPredicate() const {
+ return SubclassData;
}
- virtual Instruction *clone() const {
- return create(getOpcode(), Operands[0], Operands[1]);
+ /// @brief Provide more efficient getOperand methods.
+ Value *getOperand(unsigned i) const {
+ assert(i < 2 && "getOperand() out of range!");
+ return Ops[i];
+ }
+ void setOperand(unsigned i, Value *Val) {
+ assert(i < 2 && "setOperand() out of range!");
+ Ops[i] = Val;
}
- virtual const char *getOpcodeName() const = 0;
+ /// @brief CmpInst instructions always have 2 operands.
+ unsigned getNumOperands() const { return 2; }
- // swapOperands - Exchange the two operands to this instruction.
- // This instruction is safe to use on any binary instruction and
- // does not modify the semantics of the instruction. If the
- // instruction is order dependant (SetLT f.e.) the opcode is
- // changed. If the instruction cannot be reversed (ie, it's a Div),
- // then return true.
- //
- bool swapOperands();
+ /// This is just a convenience that dispatches to the subclasses.
+ /// @brief Swap the operands and adjust predicate accordingly to retain
+ /// the same comparison.
+ void swapOperands();
- // Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const BinaryOperator *) { return true; }
+ /// This is just a convenience that dispatches to the subclasses.
+ /// @brief Determine if this CmpInst is commutative.
+ bool isCommutative();
+
+ /// 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) {
- return I->getOpcode() >= FirstBinaryOp && I->getOpcode() < NumBinaryOps;
+ return I->getOpcode() == Instruction::ICmp ||
+ I->getOpcode() == Instruction::FCmp;
}
static inline bool classof(const Value *V) {
return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
};
+} // End llvm namespace
+
#endif