lib/Target/MSP430/MSP430ISelLowering.h

   1 //==-- MSP430ISelLowering.h - MSP430 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 MSP430 uses to lower LLVM code into a
  11 // selection DAG.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_TARGET_MSP430_ISELLOWERING_H
  16 #define LLVM_TARGET_MSP430_ISELLOWERING_H
  17
  18 #include "MSP430.h"
  19 #include "llvm/CodeGen/SelectionDAG.h"
  20 #include "llvm/Target/TargetLowering.h"
  21
  22 namespace llvm {
  23   namespace MSP430ISD {
  24     enum {
  25       FIRST_NUMBER = ISD::BUILTIN_OP_END,
  26
  27       /// Return with a flag operand. Operand 0 is the chain operand.
  28       RET_FLAG
  29     };
  30   }
  31
  32   class MSP430Subtarget;
  33   class MSP430TargetMachine;
  34
  35   class MSP430TargetLowering : public TargetLowering {
  36   public:
  37     explicit MSP430TargetLowering(MSP430TargetMachine &TM);
  38
  39     /// LowerOperation - Provide custom lowering hooks for some operations.
  40     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
  41
  42     /// getTargetNodeName - This method returns the name of a target specific
  43     /// DAG node.
  44     virtual const char *getTargetNodeName(unsigned Opcode) const;
  45
  46     SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
  47     SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
  48     SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
  49
  50   private:
  51     const MSP430Subtarget &Subtarget;
  52     const MSP430TargetMachine &TM;
  53   };
  54 } // namespace llvm
  55
  56 #endif // LLVM_TARGET_MSP430_ISELLOWERING_H