lib/Target/PTX/PTXRegisterInfo.h

   1 //===- PTXRegisterInfo.h - PTX Register Information Impl --------*- 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 contains the PTX implementation of the MRegisterInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef PTX_REGISTER_INFO_H
  15 #define PTX_REGISTER_INFO_H
  16
  17 #include "llvm/Support/ErrorHandling.h"
  18 #include "llvm/ADT/BitVector.h"
  19
  20 #include "PTXGenRegisterInfo.h.inc"
  21
  22 namespace llvm {
  23 class PTXTargetMachine;
  24 class MachineFunction;
  25
  26 struct PTXRegisterInfo : public PTXGenRegisterInfo {
  27   PTXRegisterInfo(PTXTargetMachine &TM,
  28                   const TargetInstrInfo &TII) {}
  29
  30   virtual const unsigned
  31     *getCalleeSavedRegs(const MachineFunction *MF = 0) const {
  32     static const unsigned CalleeSavedRegs[] = { 0 };
  33     return CalleeSavedRegs; // save nothing
  34   }
  35
  36   virtual BitVector getReservedRegs(const MachineFunction &MF) const {
  37     BitVector Reserved(getNumRegs());
  38     return Reserved; // reserve no regs
  39   }
  40
  41   virtual bool hasFP(const MachineFunction &MF) const { return false; }
  42
  43   virtual void eliminateFrameIndex(MachineBasicBlock::iterator MI,
  44                                    int SPAdj,
  45                                    RegScavenger *RS = NULL) const {
  46     llvm_unreachable("PTX does not support general function call");
  47   }
  48
  49   virtual void emitPrologue(MachineFunction &MF) const {}
  50   virtual void emitEpilogue(MachineFunction &MF,
  51                             MachineBasicBlock &MBB) const {}
  52
  53   virtual unsigned getFrameRegister(const MachineFunction &MF) const {
  54     llvm_unreachable("PTX does not have a frame register");
  55     return 0;
  56   }
  57
  58   virtual unsigned getRARegister() const {
  59     llvm_unreachable("PTX does not have a return address register");
  60     return 0;
  61   }
  62
  63   virtual int getDwarfRegNum(unsigned RegNum, bool isEH) const {
  64     return PTXGenRegisterInfo::getDwarfRegNumFull(RegNum, 0);
  65   }
  66 }; // struct PTXRegisterInfo
  67 } // namespace llvm
  68
  69 #endif // PTX_REGISTER_INFO_H