-//===-- llvm/InstrTypes.h - Important Instruction subclasses -----*- C++ -*--=//
+//===-- llvm/InstrTypes.h - Important Instruction subclasses ----*- C++ -*-===//
//
// This file defines various meta classes of instructions that exist in the VM
// representation. Specific concrete subclasses of these may be found in the
#define LLVM_INSTRUCTION_TYPES_H
#include "llvm/Instruction.h"
-#include <list>
-#include <vector>
-
-class Method;
-class SymTabValue;
//===----------------------------------------------------------------------===//
// 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) {
+ }
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 void dropAllReferences() = 0;
- virtual string getOpcode() const = 0;
-
- virtual bool setOperand(unsigned i, Value *Val) = 0;
- virtual const Value *getOperand(unsigned i) const = 0;
- inline Value *getOperand(unsigned i) {
- return (Value*)((const Instruction *)this)->getOperand(i);
- }
- // 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);
}
-};
-
-//===----------------------------------------------------------------------===//
-// UnaryOperator Class
-//===----------------------------------------------------------------------===//
-
-class UnaryOperator : public Instruction {
- Use Source;
-public:
-
- // getUnaryOperator() - Construct a unary instruction, given the opcode
- // and its operand.
- //
- static UnaryOperator *getUnaryOperator(unsigned Op, Value *Source);
-
- UnaryOperator(Value *S, unsigned iType, const string &Name = "")
- : Instruction(S->getType(), iType, Name), Source(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 ~UnaryOperator() { dropAllReferences(); }
-
- virtual Instruction *clone() const {
- return getUnaryOperator(getInstType(), Source);
- }
-
- virtual void dropAllReferences() {
- Source = 0;
- }
-
- virtual string getOpcode() const = 0;
-
- virtual unsigned getNumOperands() const { return 1; }
- inline Value *getOperand(unsigned i) {
- return (i == 0) ? Source : 0;
- }
- virtual const Value *getOperand(unsigned i) const {
- return (i == 0) ? Source : 0;
- }
- virtual bool setOperand(unsigned i, Value *Val) {
- // assert(Val && "operand must not be null!");
- if (i) return false;
- Source = Val;
- return true;
+ static inline bool classof(const Value *V) {
+ return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
};
-
//===----------------------------------------------------------------------===//
// BinaryOperator Class
//===----------------------------------------------------------------------===//
class BinaryOperator : public Instruction {
- Use Source1, Source2;
-public:
+protected:
+ BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
+ const std::string &Name, Instruction *InsertBefore);
- // getBinaryOperator() - Construct a binary instruction, given the opcode
- // and the two operands.
- //
- static BinaryOperator *getBinaryOperator(unsigned Op, Value *S1, Value *S2);
+public:
- BinaryOperator(unsigned iType, Value *S1, Value *S2,
- const string &Name = "")
- : Instruction(S1->getType(), iType, Name), Source1(S1, this),
- Source2(S2, this){
- assert(S1 && S2 && S1->getType() == S2->getType());
+ /// 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);
+
+
+ /// 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 (BinaryOps)Instruction::getOpcode();
}
- inline ~BinaryOperator() { dropAllReferences(); }
- virtual Instruction *clone() const {
- return getBinaryOperator(getInstType(), Source1, Source2);
+ virtual Instruction *clone() const {
+ return create(getOpcode(), Operands[0], Operands[1]);
}
- virtual void dropAllReferences() {
- Source1 = Source2 = 0;
+ /// 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;
}
-
- virtual string getOpcode() const = 0;
-
- virtual unsigned getNumOperands() const { return 2; }
- virtual const Value *getOperand(unsigned i) const {
- return (i == 0) ? Source1 : ((i == 1) ? Source2 : 0);
- }
- inline Value *getOperand(unsigned i) {
- return (i == 0) ? Source1 : ((i == 1) ? Source2 : 0);
- }
-
- virtual bool setOperand(unsigned i, Value *Val) {
- // assert(Val && "operand must not be null!");
- if (i == 0) {
- Source1 = Val; //assert(Val->getType() == Source2->getType());
- } else if (i == 1) {
- Source2 = Val; //assert(Val->getType() == Source1->getType());
- } else {
- return false;
- }
- return true;
+ static inline bool classof(const Value *V) {
+ return isa<Instruction>(V) && classof(cast<Instruction>(V));
}
};
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