1 //===- NVPTXRegisterInfo.cpp - NVPTX Register Information -----------------===// 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 NVPTX implementation of the TargetRegisterInfo class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "NVPTXRegisterInfo.h" 15 #include "NVPTX.h" 16 #include "NVPTXSubtarget.h" 17 #include "llvm/ADT/BitVector.h" 18 #include "llvm/CodeGen/MachineFrameInfo.h" 19 #include "llvm/CodeGen/MachineFunction.h" 20 #include "llvm/CodeGen/MachineInstrBuilder.h" 21 #include "llvm/MC/MachineLocation.h" 22 #include "llvm/Target/TargetInstrInfo.h" 23 24 using namespace llvm; 25 26 #define DEBUG_TYPE "nvptx-reg-info" 27 28 namespace llvm { getNVPTXRegClassName(TargetRegisterClass const * RC)29std::string getNVPTXRegClassName(TargetRegisterClass const *RC) { 30 if (RC == &NVPTX::Float32RegsRegClass) { 31 return ".f32"; 32 } 33 if (RC == &NVPTX::Float64RegsRegClass) { 34 return ".f64"; 35 } else if (RC == &NVPTX::Int64RegsRegClass) { 36 return ".s64"; 37 } else if (RC == &NVPTX::Int32RegsRegClass) { 38 return ".s32"; 39 } else if (RC == &NVPTX::Int16RegsRegClass) { 40 return ".s16"; 41 } else if (RC == &NVPTX::Int1RegsRegClass) { 42 return ".pred"; 43 } else if (RC == &NVPTX::SpecialRegsRegClass) { 44 return "!Special!"; 45 } else { 46 return "INTERNAL"; 47 } 48 return ""; 49 } 50 getNVPTXRegClassStr(TargetRegisterClass const * RC)51std::string getNVPTXRegClassStr(TargetRegisterClass const *RC) { 52 if (RC == &NVPTX::Float32RegsRegClass) { 53 return "%f"; 54 } 55 if (RC == &NVPTX::Float64RegsRegClass) { 56 return "%fd"; 57 } else if (RC == &NVPTX::Int64RegsRegClass) { 58 return "%rd"; 59 } else if (RC == &NVPTX::Int32RegsRegClass) { 60 return "%r"; 61 } else if (RC == &NVPTX::Int16RegsRegClass) { 62 return "%rs"; 63 } else if (RC == &NVPTX::Int1RegsRegClass) { 64 return "%p"; 65 } else if (RC == &NVPTX::SpecialRegsRegClass) { 66 return "!Special!"; 67 } else { 68 return "INTERNAL"; 69 } 70 return ""; 71 } 72 } 73 NVPTXRegisterInfo(const NVPTXSubtarget & st)74NVPTXRegisterInfo::NVPTXRegisterInfo(const NVPTXSubtarget &st) 75 : NVPTXGenRegisterInfo(0), Is64Bit(st.is64Bit()) {} 76 77 #define GET_REGINFO_TARGET_DESC 78 #include "NVPTXGenRegisterInfo.inc" 79 80 /// NVPTX Callee Saved Registers 81 const MCPhysReg * getCalleeSavedRegs(const MachineFunction * MF) const82NVPTXRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const { 83 static const MCPhysReg CalleeSavedRegs[] = { 0 }; 84 return CalleeSavedRegs; 85 } 86 getReservedRegs(const MachineFunction & MF) const87BitVector NVPTXRegisterInfo::getReservedRegs(const MachineFunction &MF) const { 88 BitVector Reserved(getNumRegs()); 89 return Reserved; 90 } 91 eliminateFrameIndex(MachineBasicBlock::iterator II,int SPAdj,unsigned FIOperandNum,RegScavenger * RS) const92void NVPTXRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, 93 int SPAdj, unsigned FIOperandNum, 94 RegScavenger *RS) const { 95 assert(SPAdj == 0 && "Unexpected"); 96 97 MachineInstr &MI = *II; 98 int FrameIndex = MI.getOperand(FIOperandNum).getIndex(); 99 100 MachineFunction &MF = *MI.getParent()->getParent(); 101 int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) + 102 MI.getOperand(FIOperandNum + 1).getImm(); 103 104 // Using I0 as the frame pointer 105 MI.getOperand(FIOperandNum).ChangeToRegister(NVPTX::VRFrame, false); 106 MI.getOperand(FIOperandNum + 1).ChangeToImmediate(Offset); 107 } 108 getFrameRegister(const MachineFunction & MF) const109unsigned NVPTXRegisterInfo::getFrameRegister(const MachineFunction &MF) const { 110 return NVPTX::VRFrame; 111 } 112