-//===-- 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
#include "llvm/Instruction.h"
-class Method;
-class SymTabValue;
+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, Instruction *InsertBefore = 0);
+ TerminatorInst(const Type *Ty, Instruction::TermOps iType,
+ const std::string &Name = "", Instruction *InsertBefore = 0)
+ : Instruction(Ty, iType, Name, InsertBefore) {
+ }
+ TerminatorInst(Instruction::TermOps iType, BasicBlock *InsertAtEnd);
public:
- TerminatorInst(unsigned iType);
- inline ~TerminatorInst() {}
- // Terminators must implement the methods required by Instruction...
+ /// 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. If 'idx' is out of range, a null pointer shall be
- // returned.
- //
+ /// 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);
+ const TerminatorInst *TI = this;
+ return const_cast<BasicBlock*>(TI->getSuccessor(idx));
}
-};
-
-
-//===----------------------------------------------------------------------===//
-// UnaryOperator Class
-//===----------------------------------------------------------------------===//
-
-class UnaryOperator : public Instruction {
-public:
-
- // create() - Construct a unary instruction, given the opcode
- // and its operand.
- //
- static UnaryOperator *create(UnaryOps Op, Value *Source);
- UnaryOperator(Value *S, UnaryOps iType, const string &Name = "")
- : Instruction(S->getType(), iType, Name) {
- Operands.reserve(1);
- Operands.push_back(Use(S, this));
+ // 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;
}
-
- inline UnaryOps getOpcode() const {
- return (UnaryOps)Instruction::getOpcode();
- }
-
- virtual Instruction *clone() const {
- return create(getOpcode(), Operands[0]);
+ static inline bool classof(const Value *V) {
+ return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
-
- virtual const char *getOpcodeName() const = 0;
};
-
//===----------------------------------------------------------------------===//
// BinaryOperator Class
//===----------------------------------------------------------------------===//
class BinaryOperator : public Instruction {
+protected:
+ BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
+ const std::string &Name, Instruction *InsertBefore);
+
public:
- // create() - Construct a binary instruction, given the opcode
- // and the two operands.
- //
+ /// 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 string &Name = "");
-
- BinaryOperator(BinaryOps iType, Value *S1, Value *S2,
- const 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());
- }
-
- inline BinaryOps getOpcode() const {
- return (BinaryOps)Instruction::getOpcode();
+ const std::string &Name = "",
+ Instruction *InsertBefore = 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 *createNot(Value *Op, const std::string &Name = "",
+ Instruction *InsertBefore = 0);
+
+ /// 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 BinaryOperator* Bop);
+ static Value* getNegArgument( BinaryOperator* Bop);
+ static const Value* getNotArgument(const BinaryOperator* Bop);
+ static Value* getNotArgument( BinaryOperator* Bop);
+
+ BinaryOps getOpcode() const {
+ return static_cast<BinaryOps>(Instruction::getOpcode());
}
virtual Instruction *clone() const {
return create(getOpcode(), Operands[0], Operands[1]);
}
- virtual const char *getOpcodeName() const = 0;
-
- // swapOperands - Exchange the two operands to this instruction
- void swapOperands() {
- swap(Operands[0], Operands[1]);
+ /// 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));
}
};
+} // End llvm namespace
+
#endif
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