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191 lines
7.7 KiB
C++
191 lines
7.7 KiB
C++
//===-- llvm/InstrTypes.h - Important Instruction subclasses ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines various meta classes of instructions that exist in the VM
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// representation. Specific concrete subclasses of these may be found in the
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// i*.h files...
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_INSTRUCTION_TYPES_H
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#define LLVM_INSTRUCTION_TYPES_H
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#include "llvm/Instruction.h"
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namespace llvm {
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//===----------------------------------------------------------------------===//
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// TerminatorInst Class
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//===----------------------------------------------------------------------===//
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/// TerminatorInst - Subclasses of this class are all able to terminate a basic
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/// block. Thus, these are all the flow control type of operations.
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///
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class TerminatorInst : public Instruction {
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protected:
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TerminatorInst(Instruction::TermOps iType, Instruction *InsertBefore = 0);
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TerminatorInst(const Type *Ty, Instruction::TermOps iType,
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const std::string &Name = "", Instruction *InsertBefore = 0)
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: Instruction(Ty, iType, Name, InsertBefore) {}
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TerminatorInst(Instruction::TermOps iType, BasicBlock *InsertAtEnd);
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TerminatorInst(const Type *Ty, Instruction::TermOps iType,
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const std::string &Name, BasicBlock *InsertAtEnd)
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: Instruction(Ty, iType, Name, InsertAtEnd) {}
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public:
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/// Terminators must implement the methods required by Instruction...
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virtual Instruction *clone() const = 0;
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/// Additionally, they must provide a method to get at the successors of this
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/// terminator instruction. 'idx' may not be >= the number of successors
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/// returned by getNumSuccessors()!
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///
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virtual const BasicBlock *getSuccessor(unsigned idx) const = 0;
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virtual unsigned getNumSuccessors() const = 0;
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/// Set a successor at a given index
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virtual void setSuccessor(unsigned idx, BasicBlock *B) = 0;
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inline BasicBlock *getSuccessor(unsigned idx) {
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const TerminatorInst *TI = this;
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return const_cast<BasicBlock*>(TI->getSuccessor(idx));
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const TerminatorInst *) { return true; }
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static inline bool classof(const Instruction *I) {
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return I->getOpcode() >= TermOpsBegin && I->getOpcode() < TermOpsEnd;
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}
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static inline bool classof(const Value *V) {
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return isa<Instruction>(V) && classof(cast<Instruction>(V));
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}
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};
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//===----------------------------------------------------------------------===//
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// BinaryOperator Class
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//===----------------------------------------------------------------------===//
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class BinaryOperator : public Instruction {
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protected:
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void init(BinaryOps iType, Value *S1, Value *S2);
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BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
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const std::string &Name, Instruction *InsertBefore)
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: Instruction(Ty, iType, Name, InsertBefore) {
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init(iType, S1, S2);
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}
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BinaryOperator(BinaryOps iType, Value *S1, Value *S2, const Type *Ty,
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const std::string &Name, BasicBlock *InsertAtEnd)
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: Instruction(Ty, iType, Name, InsertAtEnd) {
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init(iType, S1, S2);
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}
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public:
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/// create() - Construct a binary instruction, given the opcode and the two
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/// operands. Optionally (if InstBefore is specified) insert the instruction
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/// into a BasicBlock right before the specified instruction. The specified
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/// Instruction is allowed to be a dereferenced end iterator.
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///
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static BinaryOperator *create(BinaryOps Op, Value *S1, Value *S2,
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const std::string &Name = "",
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Instruction *InsertBefore = 0);
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/// create() - Construct a binary instruction, given the opcode and the two
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/// operands. Also automatically insert this instruction to the end of the
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/// BasicBlock specified.
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///
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static BinaryOperator *create(BinaryOps Op, Value *S1, Value *S2,
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const std::string &Name,
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BasicBlock *InsertAtEnd);
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/// create* - These methods just forward to create, and are useful when you
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/// statically know what type of instruction you're going to create. These
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/// helpers just save some typing.
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#define HANDLE_BINARY_INST(N, OPC, CLASS) \
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static BinaryOperator *create##OPC(Value *V1, Value *V2, \
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const std::string &Name = "") {\
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return create(Instruction::OPC, V1, V2, Name);\
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}
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#include "llvm/Instruction.def"
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#define HANDLE_BINARY_INST(N, OPC, CLASS) \
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static BinaryOperator *create##OPC(Value *V1, Value *V2, \
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const std::string &Name, BasicBlock *BB) {\
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return create(Instruction::OPC, V1, V2, Name, BB);\
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}
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#include "llvm/Instruction.def"
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#define HANDLE_BINARY_INST(N, OPC, CLASS) \
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static BinaryOperator *create##OPC(Value *V1, Value *V2, \
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const std::string &Name, Instruction *I) {\
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return create(Instruction::OPC, V1, V2, Name, I);\
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}
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#include "llvm/Instruction.def"
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/// Helper functions to construct and inspect unary operations (NEG and NOT)
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/// via binary operators SUB and XOR:
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///
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/// createNeg, createNot - Create the NEG and NOT
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/// instructions out of SUB and XOR instructions.
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///
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static BinaryOperator *createNeg(Value *Op, const std::string &Name = "",
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Instruction *InsertBefore = 0);
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static BinaryOperator *createNeg(Value *Op, const std::string &Name,
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BasicBlock *InsertAtEnd);
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static BinaryOperator *createNot(Value *Op, const std::string &Name = "",
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Instruction *InsertBefore = 0);
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static BinaryOperator *createNot(Value *Op, const std::string &Name,
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BasicBlock *InsertAtEnd);
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/// isNeg, isNot - Check if the given Value is a NEG or NOT instruction.
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///
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static bool isNeg(const Value *V);
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static bool isNot(const Value *V);
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/// getNegArgument, getNotArgument - Helper functions to extract the
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/// unary argument of a NEG or NOT operation implemented via Sub or Xor.
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///
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static const Value* getNegArgument(const BinaryOperator* Bop);
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static Value* getNegArgument( BinaryOperator* Bop);
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static const Value* getNotArgument(const BinaryOperator* Bop);
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static Value* getNotArgument( BinaryOperator* Bop);
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BinaryOps getOpcode() const {
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return static_cast<BinaryOps>(Instruction::getOpcode());
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}
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virtual Instruction *clone() const {
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return create(getOpcode(), Operands[0], Operands[1]);
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}
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/// swapOperands - Exchange the two operands to this instruction.
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/// This instruction is safe to use on any binary instruction and
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/// does not modify the semantics of the instruction. If the
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/// instruction is order dependent (SetLT f.e.) the opcode is
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/// changed. If the instruction cannot be reversed (ie, it's a Div),
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/// then return true.
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///
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bool swapOperands();
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const BinaryOperator *) { return true; }
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static inline bool classof(const Instruction *I) {
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return I->getOpcode() >= BinaryOpsBegin && I->getOpcode() < BinaryOpsEnd;
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}
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static inline bool classof(const Value *V) {
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return isa<Instruction>(V) && classof(cast<Instruction>(V));
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}
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};
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} // End llvm namespace
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#endif
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