1234285Sdim//===-- MipsMachineFunctionInfo.cpp - Private data used for Mips ----------===// 2234285Sdim// 3234285Sdim// The LLVM Compiler Infrastructure 4234285Sdim// 5234285Sdim// This file is distributed under the University of Illinois Open Source 6234285Sdim// License. See LICENSE.TXT for details. 7234285Sdim// 8234285Sdim//===----------------------------------------------------------------------===// 9234285Sdim 10234285Sdim#include "MipsMachineFunction.h" 11252723Sdim#include "MCTargetDesc/MipsBaseInfo.h" 12234285Sdim#include "MipsInstrInfo.h" 13234285Sdim#include "MipsSubtarget.h" 14234285Sdim#include "llvm/CodeGen/MachineInstrBuilder.h" 15234285Sdim#include "llvm/CodeGen/MachineRegisterInfo.h" 16252723Sdim#include "llvm/IR/Function.h" 17234285Sdim#include "llvm/Support/CommandLine.h" 18263509Sdim#include "llvm/Support/raw_ostream.h" 19234285Sdim 20234285Sdimusing namespace llvm; 21234285Sdim 22234285Sdimstatic cl::opt<bool> 23234285SdimFixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true), 24234285Sdim cl::desc("Always use $gp as the global base register.")); 25234285Sdim 26263509Sdim// class MipsCallEntry. 27263509SdimMipsCallEntry::MipsCallEntry(const StringRef &N) { 28263509Sdim#ifndef NDEBUG 29263509Sdim Name = N; 30263509Sdim Val = 0; 31263509Sdim#endif 32263509Sdim} 33263509Sdim 34263509SdimMipsCallEntry::MipsCallEntry(const GlobalValue *V) { 35263509Sdim#ifndef NDEBUG 36263509Sdim Val = V; 37263509Sdim#endif 38263509Sdim} 39263509Sdim 40263509Sdimbool MipsCallEntry::isConstant(const MachineFrameInfo *) const { 41263509Sdim return false; 42263509Sdim} 43263509Sdim 44263509Sdimbool MipsCallEntry::isAliased(const MachineFrameInfo *) const { 45263509Sdim return false; 46263509Sdim} 47263509Sdim 48263509Sdimbool MipsCallEntry::mayAlias(const MachineFrameInfo *) const { 49263509Sdim return false; 50263509Sdim} 51263509Sdim 52263509Sdimvoid MipsCallEntry::printCustom(raw_ostream &O) const { 53263509Sdim O << "MipsCallEntry: "; 54263509Sdim#ifndef NDEBUG 55263509Sdim if (Val) 56263509Sdim O << Val->getName(); 57263509Sdim else 58263509Sdim O << Name; 59263509Sdim#endif 60263509Sdim} 61263509Sdim 62263509SdimMipsFunctionInfo::~MipsFunctionInfo() { 63263509Sdim for (StringMap<const MipsCallEntry *>::iterator 64263509Sdim I = ExternalCallEntries.begin(), E = ExternalCallEntries.end(); I != E; 65263509Sdim ++I) 66263509Sdim delete I->getValue(); 67263509Sdim 68263509Sdim for (ValueMap<const GlobalValue *, const MipsCallEntry *>::iterator 69263509Sdim I = GlobalCallEntries.begin(), E = GlobalCallEntries.end(); I != E; ++I) 70263509Sdim delete I->second; 71263509Sdim} 72263509Sdim 73234285Sdimbool MipsFunctionInfo::globalBaseRegSet() const { 74234285Sdim return GlobalBaseReg; 75234285Sdim} 76234285Sdim 77234285Sdimunsigned MipsFunctionInfo::getGlobalBaseReg() { 78234285Sdim // Return if it has already been initialized. 79234285Sdim if (GlobalBaseReg) 80234285Sdim return GlobalBaseReg; 81234285Sdim 82234285Sdim const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 83234285Sdim 84234285Sdim const TargetRegisterClass *RC; 85245431Sdim if (ST.inMips16Mode()) 86245431Sdim RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 87245431Sdim else 88245431Sdim RC = ST.isABI_N64() ? 89263509Sdim (const TargetRegisterClass*)&Mips::GPR64RegClass : 90263509Sdim (const TargetRegisterClass*)&Mips::GPR32RegClass; 91234285Sdim return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC); 92234285Sdim} 93234285Sdim 94245431Sdimbool MipsFunctionInfo::mips16SPAliasRegSet() const { 95245431Sdim return Mips16SPAliasReg; 96245431Sdim} 97245431Sdimunsigned MipsFunctionInfo::getMips16SPAliasReg() { 98245431Sdim // Return if it has already been initialized. 99245431Sdim if (Mips16SPAliasReg) 100245431Sdim return Mips16SPAliasReg; 101245431Sdim 102245431Sdim const TargetRegisterClass *RC; 103245431Sdim RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 104245431Sdim return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC); 105245431Sdim} 106245431Sdim 107252723Sdimvoid MipsFunctionInfo::createEhDataRegsFI() { 108252723Sdim for (int I = 0; I < 4; ++I) { 109252723Sdim const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 110252723Sdim const TargetRegisterClass *RC = ST.isABI_N64() ? 111263509Sdim &Mips::GPR64RegClass : &Mips::GPR32RegClass; 112252723Sdim 113252723Sdim EhDataRegFI[I] = MF.getFrameInfo()->CreateStackObject(RC->getSize(), 114252723Sdim RC->getAlignment(), false); 115252723Sdim } 116252723Sdim} 117252723Sdim 118252723Sdimbool MipsFunctionInfo::isEhDataRegFI(int FI) const { 119252723Sdim return CallsEhReturn && (FI == EhDataRegFI[0] || FI == EhDataRegFI[1] 120252723Sdim || FI == EhDataRegFI[2] || FI == EhDataRegFI[3]); 121252723Sdim} 122252723Sdim 123263509SdimMachinePointerInfo MipsFunctionInfo::callPtrInfo(const StringRef &Name) { 124263509Sdim const MipsCallEntry *&E = ExternalCallEntries[Name]; 125263509Sdim 126263509Sdim if (!E) 127263509Sdim E = new MipsCallEntry(Name); 128263509Sdim 129263509Sdim return MachinePointerInfo(E); 130263509Sdim} 131263509Sdim 132263509SdimMachinePointerInfo MipsFunctionInfo::callPtrInfo(const GlobalValue *Val) { 133263509Sdim const MipsCallEntry *&E = GlobalCallEntries[Val]; 134263509Sdim 135263509Sdim if (!E) 136263509Sdim E = new MipsCallEntry(Val); 137263509Sdim 138263509Sdim return MachinePointerInfo(E); 139263509Sdim} 140263509Sdim 141234285Sdimvoid MipsFunctionInfo::anchor() { } 142