| //===-- PTXMachineFuctionInfo.h - PTX machine function info ------*- C++ -*-==// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file declares PTX-specific per-machine-function information. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef PTX_MACHINE_FUNCTION_INFO_H |
| #define PTX_MACHINE_FUNCTION_INFO_H |
| |
| #include "PTX.h" |
| #include "PTXParamManager.h" |
| #include "PTXRegisterInfo.h" |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/ADT/DenseSet.h" |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/CodeGen/MachineFunction.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| namespace llvm { |
| |
| /// PTXMachineFunctionInfo - This class is derived from MachineFunction and |
| /// contains private PTX target-specific information for each MachineFunction. |
| /// |
| class PTXMachineFunctionInfo : public MachineFunctionInfo { |
| virtual void anchor(); |
| bool IsKernel; |
| DenseSet<unsigned> RegArgs; |
| DenseSet<unsigned> RegRets; |
| |
| typedef DenseMap<int, std::string> FrameMap; |
| |
| FrameMap FrameSymbols; |
| |
| struct RegisterInfo { |
| unsigned Reg; |
| unsigned Type; |
| unsigned Space; |
| unsigned Offset; |
| unsigned Encoded; |
| }; |
| |
| typedef DenseMap<unsigned, RegisterInfo> RegisterInfoMap; |
| |
| RegisterInfoMap RegInfo; |
| |
| PTXParamManager ParamManager; |
| |
| public: |
| typedef DenseSet<unsigned>::const_iterator reg_iterator; |
| |
| PTXMachineFunctionInfo(MachineFunction &MF) |
| : IsKernel(false) { |
| } |
| |
| /// getParamManager - Returns the PTXParamManager instance for this function. |
| PTXParamManager& getParamManager() { return ParamManager; } |
| const PTXParamManager& getParamManager() const { return ParamManager; } |
| |
| /// setKernel/isKernel - Gets/sets a flag that indicates if this function is |
| /// a PTX kernel function. |
| void setKernel(bool _IsKernel=true) { IsKernel = _IsKernel; } |
| bool isKernel() const { return IsKernel; } |
| |
| /// argreg_begin/argreg_end - Returns iterators to the set of registers |
| /// containing function arguments. |
| reg_iterator argreg_begin() const { return RegArgs.begin(); } |
| reg_iterator argreg_end() const { return RegArgs.end(); } |
| |
| /// retreg_begin/retreg_end - Returns iterators to the set of registers |
| /// containing the function return values. |
| reg_iterator retreg_begin() const { return RegRets.begin(); } |
| reg_iterator retreg_end() const { return RegRets.end(); } |
| |
| /// addRegister - Adds a virtual register to the set of all used registers |
| void addRegister(unsigned Reg, unsigned RegType, unsigned RegSpace) { |
| if (!RegInfo.count(Reg)) { |
| RegisterInfo Info; |
| Info.Reg = Reg; |
| Info.Type = RegType; |
| Info.Space = RegSpace; |
| |
| // Determine register offset |
| Info.Offset = 0; |
| for(RegisterInfoMap::const_iterator i = RegInfo.begin(), |
| e = RegInfo.end(); i != e; ++i) { |
| const RegisterInfo& RI = i->second; |
| if (RI.Space == RegSpace) |
| if (RI.Space != PTXRegisterSpace::Reg || RI.Type == Info.Type) |
| Info.Offset++; |
| } |
| |
| // Encode the register data into a single register number |
| Info.Encoded = (Info.Offset << 6) | (Info.Type << 3) | Info.Space; |
| |
| RegInfo[Reg] = Info; |
| |
| if (RegSpace == PTXRegisterSpace::Argument) |
| RegArgs.insert(Reg); |
| else if (RegSpace == PTXRegisterSpace::Return) |
| RegRets.insert(Reg); |
| } |
| } |
| |
| /// countRegisters - Returns the number of registers of the given type and |
| /// space. |
| unsigned countRegisters(unsigned RegType, unsigned RegSpace) const { |
| unsigned Count = 0; |
| for(RegisterInfoMap::const_iterator i = RegInfo.begin(), e = RegInfo.end(); |
| i != e; ++i) { |
| const RegisterInfo& RI = i->second; |
| if (RI.Type == RegType && RI.Space == RegSpace) |
| Count++; |
| } |
| return Count; |
| } |
| |
| /// getEncodedRegister - Returns the encoded value of the register. |
| unsigned getEncodedRegister(unsigned Reg) const { |
| return RegInfo.lookup(Reg).Encoded; |
| } |
| |
| /// addRetReg - Adds a register to the set of return-value registers. |
| void addRetReg(unsigned Reg) { |
| if (!RegRets.count(Reg)) { |
| RegRets.insert(Reg); |
| } |
| } |
| |
| /// addArgReg - Adds a register to the set of function argument registers. |
| void addArgReg(unsigned Reg) { |
| RegArgs.insert(Reg); |
| } |
| |
| /// getRegisterName - Returns the name of the specified virtual register. This |
| /// name is used during PTX emission. |
| std::string getRegisterName(unsigned Reg) const { |
| if (RegInfo.count(Reg)) { |
| const RegisterInfo& RI = RegInfo.lookup(Reg); |
| std::string Name; |
| raw_string_ostream NameStr(Name); |
| decodeRegisterName(NameStr, RI.Encoded); |
| NameStr.flush(); |
| return Name; |
| } |
| else if (Reg == PTX::NoRegister) |
| return "%noreg"; |
| else |
| llvm_unreachable("Register not in register name map"); |
| } |
| |
| /// getEncodedRegisterName - Returns the name of the encoded register. |
| std::string getEncodedRegisterName(unsigned EncodedReg) const { |
| std::string Name; |
| raw_string_ostream NameStr(Name); |
| decodeRegisterName(NameStr, EncodedReg); |
| NameStr.flush(); |
| return Name; |
| } |
| |
| /// getRegisterType - Returns the type of the specified virtual register. |
| unsigned getRegisterType(unsigned Reg) const { |
| if (RegInfo.count(Reg)) |
| return RegInfo.lookup(Reg).Type; |
| else |
| llvm_unreachable("Unknown register"); |
| } |
| |
| /// getOffsetForRegister - Returns the offset of the virtual register |
| unsigned getOffsetForRegister(unsigned Reg) const { |
| if (RegInfo.count(Reg)) |
| return RegInfo.lookup(Reg).Offset; |
| else |
| return 0; |
| } |
| |
| /// getFrameSymbol - Returns the symbol name for the given FrameIndex. |
| const char* getFrameSymbol(int FrameIndex) { |
| if (FrameSymbols.count(FrameIndex)) { |
| return FrameSymbols.lookup(FrameIndex).c_str(); |
| } else { |
| std::string Name = "__local"; |
| Name += utostr(FrameIndex); |
| // The whole point of caching this name is to ensure the pointer we pass |
| // to any getExternalSymbol() calls will remain valid for the lifetime of |
| // the back-end instance. This is to work around an issue in SelectionDAG |
| // where symbol names are expected to be life-long strings. |
| FrameSymbols[FrameIndex] = Name; |
| return FrameSymbols[FrameIndex].c_str(); |
| } |
| } |
| }; // class PTXMachineFunctionInfo |
| } // namespace llvm |
| |
| #endif // PTX_MACHINE_FUNCTION_INFO_H |