lib/Target/PTX/PTXISelLowering.cpp

   1 //===-- PTXISelLowering.cpp - PTX DAG Lowering Implementation -------------===//
   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 implements the PTXTargetLowering class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "PTXISelLowering.h"
  15 #include "PTXRegisterInfo.h"
  16 #include "llvm/Support/ErrorHandling.h"
  17 #include "llvm/CodeGen/SelectionDAG.h"
  18 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
  19
  20 using namespace llvm;
  21
  22 PTXTargetLowering::PTXTargetLowering(TargetMachine &TM)
  23   : TargetLowering(TM, new TargetLoweringObjectFileELF()) {
  24   // Set up the register classes.
  25   addRegisterClass(MVT::i1, PTX::PredsRegisterClass);
  26
  27   // Compute derived properties from the register classes
  28   computeRegisterProperties();
  29 }
  30
  31 const char *PTXTargetLowering::getTargetNodeName(unsigned Opcode) const {
  32   switch (Opcode) {
  33     default:           llvm_unreachable("Unknown opcode");
  34     case PTXISD::EXIT: return "PTXISD::EXIT";
  35   }
  36 }
  37
  38 //===----------------------------------------------------------------------===//
  39 //                      Calling Convention Implementation
  40 //===----------------------------------------------------------------------===//
  41
  42 SDValue PTXTargetLowering::
  43   LowerFormalArguments(SDValue Chain,
  44                        CallingConv::ID CallConv,
  45                        bool isVarArg,
  46                        const SmallVectorImpl<ISD::InputArg> &Ins,
  47                        DebugLoc dl,
  48                        SelectionDAG &DAG,
  49                        SmallVectorImpl<SDValue> &InVals) const {
  50   return Chain;
  51 }
  52
  53 SDValue PTXTargetLowering::
  54   LowerReturn(SDValue Chain,
  55               CallingConv::ID CallConv,
  56               bool isVarArg,
  57               const SmallVectorImpl<ISD::OutputArg> &Outs,
  58               const SmallVectorImpl<SDValue> &OutVals,
  59               DebugLoc dl,
  60               SelectionDAG &DAG) const {
  61   return DAG.getNode(PTXISD::EXIT, dl, MVT::Other, Chain);
  62 }