mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-17 20:29:31 +00:00
848414e49c
expressions. These will get used to reduce clutter as we replace various calls to createInferredCast and getCast. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32191 91177308-0d34-0410-b5e6-96231b3b80d8
558 lines
24 KiB
C++
558 lines
24 KiB
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
|
|
// i*.h files...
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_INSTRUCTION_TYPES_H
|
|
#define LLVM_INSTRUCTION_TYPES_H
|
|
|
|
#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.
|
|
///
|
|
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) {}
|
|
|
|
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) {}
|
|
|
|
// 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:
|
|
|
|
virtual Instruction *clone() const = 0;
|
|
|
|
/// 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() >= TermOpsBegin && I->getOpcode() < TermOpsEnd;
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return isa<Instruction>(V) && classof(cast<Instruction>(V));
|
|
}
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// UnaryInstruction Class
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
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,
|
|
const std::string &Name, BasicBlock *IAE)
|
|
: Instruction(Ty, iType, &Op, 1, Name, 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; }
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// BinaryOperator Class
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
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)
|
|
: Instruction(Ty, iType, Ops, 2, Name, InsertBefore) {
|
|
Ops[0].init(S1, this);
|
|
Ops[1].init(S2, this);
|
|
init(iType);
|
|
}
|
|
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);
|
|
}
|
|
|
|
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"
|
|
|
|
|
|
/// 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 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 BinaryOperator *) { return true; }
|
|
static inline bool classof(const Instruction *I) {
|
|
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, Name, InsertBefore) {
|
|
}
|
|
/// @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, Name, InsertAtEnd) {
|
|
}
|
|
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 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.
|
|
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
|
|
);
|
|
|
|
/// Joins the create method (with insert-before-instruction semantics) above
|
|
/// with the getCastOpcode method. getOpcode(S,Ty) is called first to
|
|
/// obtain the opcode for casting S to type Ty. Then the get(...) method is
|
|
/// called to create the CastInst and insert it. The instruction is
|
|
/// inserted before InsertBefore (if it is non-null). The cast created is
|
|
/// inferred, because only the types involved are used in determining which
|
|
/// cast opcode to use. For specific casts, use one of the create methods.
|
|
/// @brief Inline helper method to join create with getCastOpcode.
|
|
inline static CastInst *createInferredCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
bool SrcIsSigned, ///< Whether to treat the source as signed
|
|
const Type *Ty, ///< Type to which operand should be casted
|
|
bool DstIsSigned, ///< Whether to treate the dest. as signed
|
|
const std::string &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the CastInst
|
|
) {
|
|
return create(getCastOpcode(S, SrcIsSigned, Ty, DstIsSigned),
|
|
S, Ty, Name, InsertBefore);
|
|
}
|
|
static CastInst *createInferredCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< Type to which operand should be casted
|
|
const std::string &Name = "", ///< Name for the instruction
|
|
Instruction *InsertBefore = 0 ///< Place to insert the CastInst
|
|
);
|
|
|
|
/// Joins the get method (with insert-at-end-of-block semantics) method
|
|
/// above with the getCastOpcode method. getOpcode(S,Ty) is called first to
|
|
/// obtain the usual casting opcode for casting S to type Ty. Then the
|
|
/// get(...) method is called to create the CastInst and insert it. The
|
|
/// instruction is inserted at the end of InsertAtEnd (if it is non-null).
|
|
/// The created cast is inferred, because only the types involved are used
|
|
/// in determining which cast opcode to use. For specific casts, use one of
|
|
/// the create methods.
|
|
/// @brief Inline helper method to join create with getCastOpcode.
|
|
inline static CastInst *createInferredCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
bool SrcIsSigned, ///< Whether to treat the source as signed
|
|
const Type *Ty, ///< Type to which operand should be casted
|
|
bool DstIsSigned, ///< Whether to treate the dest. as signed
|
|
const std::string &Name, ///< Name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
) {
|
|
return create(getCastOpcode(S, SrcIsSigned, Ty, DstIsSigned),
|
|
S, Ty, Name, InsertAtEnd);
|
|
}
|
|
|
|
static CastInst *createInferredCast(
|
|
Value *S, ///< The value to be casted (operand 0)
|
|
const Type *Ty, ///< Type to which operand should be casted
|
|
const std::string &Name, ///< Name for the instruction
|
|
BasicBlock *InsertAtEnd ///< The block to insert the instruction into
|
|
);
|
|
|
|
/// 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::ULongTy, 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 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
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// 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:
|
|
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);
|
|
|
|
/// 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 Implement superclass method.
|
|
virtual CmpInst *clone() const;
|
|
|
|
/// 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;
|
|
}
|
|
|
|
/// @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;
|
|
}
|
|
|
|
/// @brief CmpInst instructions always have 2 operands.
|
|
unsigned getNumOperands() const { return 2; }
|
|
|
|
/// This is just a convenience that dispatches to the subclasses.
|
|
/// @brief Swap the operands.
|
|
void swapOperands();
|
|
|
|
/// 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();
|
|
|
|
/// @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() == 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
|