MipsMachineFunction.cpp revision 3ee306cbc0a295409c464ffaad5ef694de8eb09a
1//===-- MipsMachineFunctionInfo.cpp - Private data used for Mips ----------===// 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#include "MipsMachineFunction.h" 11#include "MipsInstrInfo.h" 12#include "MipsSubtarget.h" 13#include "MCTargetDesc/MipsBaseInfo.h" 14#include "llvm/Function.h" 15#include "llvm/CodeGen/MachineInstrBuilder.h" 16#include "llvm/CodeGen/MachineRegisterInfo.h" 17#include "llvm/Support/CommandLine.h" 18 19using namespace llvm; 20 21static cl::opt<bool> 22FixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true), 23 cl::desc("Always use $gp as the global base register.")); 24 25bool MipsFunctionInfo::globalBaseRegSet() const { 26 return GlobalBaseReg; 27} 28 29unsigned MipsFunctionInfo::getGlobalBaseReg() { 30 // Return if it has already been initialized. 31 if (GlobalBaseReg) 32 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 46void MipsFunctionInfo::anchor() { } 47