lib/Target/Nios2/Nios2ISelLowering.h

   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