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      1 //==-- PTXISelLowering.h - PTX 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 PTX uses to lower LLVM code into a
     11 // selection DAG.
     12 //
     13 //===----------------------------------------------------------------------===//
     14 
     15 #ifndef PTX_ISEL_LOWERING_H
     16 #define PTX_ISEL_LOWERING_H
     17 
     18 #include "llvm/Target/TargetLowering.h"
     19 
     20 namespace llvm {
     21 class PTXSubtarget;
     22 class PTXTargetMachine;
     23 
     24 namespace PTXISD {
     25   enum NodeType {
     26     FIRST_NUMBER = ISD::BUILTIN_OP_END,
     27     LOAD_PARAM,
     28     STORE_PARAM,
     29     READ_PARAM,
     30     WRITE_PARAM,
     31     EXIT,
     32     RET,
     33     COPY_ADDRESS,
     34     CALL
     35   };
     36 }                               // namespace PTXISD
     37 
     38 class PTXTargetLowering : public TargetLowering {
     39   public:
     40     explicit PTXTargetLowering(TargetMachine &TM);
     41 
     42     virtual const char *getTargetNodeName(unsigned Opcode) const;
     43 
     44     virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
     45 
     46     virtual SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const;
     47 
     48     virtual SDValue
     49       LowerFormalArguments(SDValue Chain,
     50                            CallingConv::ID CallConv,
     51                            bool isVarArg,
     52                            const SmallVectorImpl<ISD::InputArg> &Ins,
     53                            DebugLoc dl,
     54                            SelectionDAG &DAG,
     55                            SmallVectorImpl<SDValue> &InVals) const;
     56 
     57     virtual SDValue
     58       LowerReturn(SDValue Chain,
     59                   CallingConv::ID CallConv,
     60                   bool isVarArg,
     61                   const SmallVectorImpl<ISD::OutputArg> &Outs,
     62                   const SmallVectorImpl<SDValue> &OutVals,
     63                   DebugLoc dl,
     64                   SelectionDAG &DAG) const;
     65 
     66     virtual SDValue
     67       LowerCall(SDValue Chain, SDValue Callee,
     68                 CallingConv::ID CallConv, bool isVarArg,
     69                 bool &isTailCall,
     70                 const SmallVectorImpl<ISD::OutputArg> &Outs,
     71                 const SmallVectorImpl<SDValue> &OutVals,
     72                 const SmallVectorImpl<ISD::InputArg> &Ins,
     73                 DebugLoc dl, SelectionDAG &DAG,
     74                 SmallVectorImpl<SDValue> &InVals) const;
     75 
     76     virtual EVT getSetCCResultType(EVT VT) const;
     77 
     78     virtual unsigned getNumRegisters(LLVMContext &Context, EVT VT);
     79 
     80   private:
     81     SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
     82 }; // class PTXTargetLowering
     83 } // namespace llvm
     84 
     85 #endif // PTX_ISEL_LOWERING_H
     86