SIRegisterInfo.h revision 285830
1//===-- SIRegisterInfo.h - SI Register Info 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/// \file 11/// \brief Interface definition for SIRegisterInfo 12// 13//===----------------------------------------------------------------------===// 14 15 16#ifndef SIREGISTERINFO_H_ 17#define SIREGISTERINFO_H_ 18 19#include "AMDGPURegisterInfo.h" 20 21namespace llvm { 22 23class AMDGPUTargetMachine; 24 25struct SIRegisterInfo : public AMDGPURegisterInfo { 26 AMDGPUTargetMachine &TM; 27 28 SIRegisterInfo(AMDGPUTargetMachine &tm); 29 30 virtual BitVector getReservedRegs(const MachineFunction &MF) const; 31 32 virtual unsigned getRegPressureLimit(const TargetRegisterClass *RC, 33 MachineFunction &MF) const; 34 35 /// \param RC is an AMDIL reg class. 36 /// 37 /// \returns the SI register class that is equivalent to \p RC. 38 virtual const TargetRegisterClass * 39 getISARegClass(const TargetRegisterClass *RC) const; 40 41 /// \brief get the register class of the specified type to use in the 42 /// CFGStructurizer 43 virtual const TargetRegisterClass * getCFGStructurizerRegClass(MVT VT) const; 44 45 virtual unsigned getHWRegIndex(unsigned Reg) const; 46 47 /// \brief Return the 'base' register class for this register. 48 /// e.g. SGPR0 => SReg_32, VGPR => VReg_32 SGPR0_SGPR1 -> SReg_32, etc. 49 const TargetRegisterClass *getPhysRegClass(unsigned Reg) const; 50 51 /// \returns true if this class contains only SGPR registers 52 bool isSGPRClass(const TargetRegisterClass *RC) const; 53 54 /// \returns true if this class contains VGPR registers. 55 bool hasVGPRs(const TargetRegisterClass *RC) const; 56 57 /// \returns A VGPR reg class with the same width as \p SRC 58 const TargetRegisterClass *getEquivalentVGPRClass( 59 const TargetRegisterClass *SRC) const; 60 61 /// \returns The register class that is used for a sub-register of \p RC for 62 /// the given \p SubIdx. If \p SubIdx equals NoSubRegister, \p RC will 63 /// be returned. 64 const TargetRegisterClass *getSubRegClass(const TargetRegisterClass *RC, 65 unsigned SubIdx) const; 66}; 67 68} // End namespace llvm 69 70#endif // SIREGISTERINFO_H_ 71