MipsMachineFunction.cpp revision d04a8d4b33ff316ca4cf961e06c9e312eff8e64f
1424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)//===-- MipsMachineFunctionInfo.cpp - Private data used for Mips ----------===// 2424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)// 3424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)// The LLVM Compiler Infrastructure 4424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)// 5424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)// This file is distributed under the University of Illinois Open Source 6424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)// License. See LICENSE.TXT for details. 7424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)// 8424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)//===----------------------------------------------------------------------===// 9424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) 10424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "MipsMachineFunction.h" 11424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "MCTargetDesc/MipsBaseInfo.h" 12424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "MipsInstrInfo.h" 13424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "MipsSubtarget.h" 14424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "llvm/CodeGen/MachineInstrBuilder.h" 15424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "llvm/CodeGen/MachineRegisterInfo.h" 16424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "llvm/Function.h" 17424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)#include "llvm/Support/CommandLine.h" 18424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) 19424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)using namespace llvm; 20424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) 21424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)static cl::opt<bool> 22424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)FixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true), 23424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) cl::desc("Always use $gp as the global base register.")); 24424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) 25424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)bool MipsFunctionInfo::globalBaseRegSet() const { 26424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) return GlobalBaseReg; 27424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)} 28424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) 29424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles)unsigned MipsFunctionInfo::getGlobalBaseReg() { 30424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) // Return if it has already been initialized. 31424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) if (GlobalBaseReg) 32424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) return GlobalBaseReg; 33 34 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 35 36 const TargetRegisterClass *RC; 37 if (ST.inMips16Mode()) 38 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 39 else 40 RC = ST.isABI_N64() ? 41 (const TargetRegisterClass*)&Mips::CPU64RegsRegClass : 42 (const TargetRegisterClass*)&Mips::CPURegsRegClass; 43 return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC); 44} 45 46bool MipsFunctionInfo::mips16SPAliasRegSet() const { 47 return Mips16SPAliasReg; 48} 49unsigned MipsFunctionInfo::getMips16SPAliasReg() { 50 // Return if it has already been initialized. 51 if (Mips16SPAliasReg) 52 return Mips16SPAliasReg; 53 54 const TargetRegisterClass *RC; 55 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 56 return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC); 57} 58 59void MipsFunctionInfo::anchor() { } 60