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SparcV9TmpInstr.h

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00001 //===-- SparcV9TmpInstr.h ---------------------------------------*- C++ -*-===//
00002 // 
00003 //                     The LLVM Compiler Infrastructure
00004 //
00005 // This file was developed by the LLVM research group and is distributed under
00006 // the University of Illinois Open Source License. See LICENSE.TXT for details.
00007 // 
00008 //===----------------------------------------------------------------------===//
00009 //
00010 // Definition of class for temporary intermediate values used within the current
00011 // SparcV9 backend.
00012 //
00013 //===----------------------------------------------------------------------===//
00014 
00015 #ifndef SPARCV9TMPINSTR_H
00016 #define SPARCV9TMPINSTR_H
00017 
00018 #include "llvm/Instruction.h"
00019 #include "MachineCodeForInstruction.h"
00020 
00021 namespace llvm {
00022 
00023 /// TmpInstruction - This class represents temporary intermediate
00024 /// values used within the SparcV9 machine code for an LLVM instruction.
00025 /// 
00026 class TmpInstruction : public Instruction {
00027   TmpInstruction(const TmpInstruction &TI)
00028     : Instruction(TI.getType(), TI.getOpcode()) {
00029     if (!TI.Operands.empty()) {
00030       Operands.push_back(Use(TI.Operands[0], this));
00031       if (TI.Operands.size() == 2)
00032         Operands.push_back(Use(TI.Operands[1], this));
00033       else
00034         assert(0 && "Bad # operands to TmpInstruction!");
00035     }
00036   }
00037 public:
00038   // Constructor that uses the type of S1 as the type of the temporary.
00039   // s1 must be a valid value.  s2 may be NULL.
00040   TmpInstruction(MachineCodeForInstruction &mcfi,
00041                  Value *s1, Value *s2 = 0, const std::string &name = "");
00042                  
00043   // Constructor that uses the type of S1 as the type of the temporary,
00044   // but does not require a MachineCodeForInstruction.
00045   // s1 must be a valid value.  s2 may be NULL.
00046   TmpInstruction(Value *s1, Value *s2 = 0, const std::string &name = "");
00047 
00048   // Constructor that requires the type of the temporary to be specified.
00049   // Both S1 and S2 may be NULL.
00050   TmpInstruction(MachineCodeForInstruction& mcfi,
00051                  const Type *Ty, Value *s1 = 0, Value* s2 = 0,
00052                  const std::string &name = "");
00053   
00054   virtual Instruction *clone() const {
00055     assert(0 && "Cannot clone TmpInstructions!");
00056     return 0;
00057   }
00058   virtual const char *getOpcodeName() const { return "TmpInstruction"; }
00059   
00060   // Methods for support type inquiry through isa, cast, and dyn_cast:
00061   static inline bool classof(const TmpInstruction *) { return true; }
00062   static inline bool classof(const Instruction *I) {
00063     return (I->getOpcode() == Instruction::UserOp1);
00064   }
00065   static inline bool classof(const Value *V) {
00066     return isa<Instruction>(V) && classof(cast<Instruction>(V));
00067   }
00068 };
00069 
00070 } // End llvm namespace
00071 
00072 #endif