1 //===-- Nios2ISelLowering.h - Nios2 DAG Lowering Interface ------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines the interfaces that Nios2 uses to lower LLVM code into a 11 // selection DAG. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_LIB_TARGET_NIOS2_NIOS2ISELLOWERING_H 16 #define LLVM_LIB_TARGET_NIOS2_NIOS2ISELLOWERING_H 17 18 #include "Nios2.h" 19 #include "llvm/CodeGen/TargetLowering.h" 20 21 namespace llvm { 22 class Nios2Subtarget; 23 24 namespace Nios2ISD { 25 enum NodeType { 26 // Start the numbering from where ISD NodeType finishes. 27 FIRST_NUMBER = ISD::BUILTIN_OP_END, 28 29 // Get the Higher 16 bits from a 32-bit immediate 30 // No relation with Nios2 Hi register 31 Hi, 32 // Get the Lower 16 bits from a 32-bit immediate 33 // No relation with Nios2 Lo register 34 Lo, 35 // Return 36 Ret 37 }; 38 } 39 40 class Nios2TargetLowering : public TargetLowering { 41 const Nios2Subtarget *Subtarget; 42 43 public: 44 Nios2TargetLowering(const TargetMachine &TM, const Nios2Subtarget &STI); 45 46 /// getTargetNodeName - This method returns the name of a target specific 47 // DAG node. 48 const char *getTargetNodeName(unsigned Opcode) const override; 49 50 SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, 51 bool IsVarArg, 52 const SmallVectorImpl<ISD::InputArg> &Ins, 53 const SDLoc &dl, SelectionDAG &DAG, 54 SmallVectorImpl<SDValue> &InVals) const override; 55 56 SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, 57 const SmallVectorImpl<ISD::OutputArg> &Outs, 58 const SmallVectorImpl<SDValue> &OutVals, const SDLoc &dl, 59 SelectionDAG &DAG) const override; 60 }; 61 } // end namespace llvm 62 63 #endif // NIOS2_ISELLOWERING_H 64
