MipsMachineFunction.cpp revision ba1bc60542a1a4c7ade1a563465328a3fdde1fc7
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 "MCTargetDesc/MipsBaseInfo.h" 12#include "MipsInstrInfo.h" 13#include "MipsSubtarget.h" 14#include "llvm/CodeGen/MachineInstrBuilder.h" 15#include "llvm/CodeGen/MachineRegisterInfo.h" 16#include "llvm/IR/Function.h" 17#include "llvm/Support/CommandLine.h" 18#include "llvm/Support/raw_ostream.h" 19 20using namespace llvm; 21 22static cl::opt<bool> 23FixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true), 24 cl::desc("Always use $gp as the global base register.")); 25 26// class MipsCallEntry. 27MipsCallEntry::MipsCallEntry(const StringRef &N) { 28#ifndef NDEBUG 29 Name = N; 30 Val = 0; 31#endif 32} 33 34MipsCallEntry::MipsCallEntry(const GlobalValue *V) { 35#ifndef NDEBUG 36 Val = V; 37#endif 38} 39 40bool MipsCallEntry::isConstant(const MachineFrameInfo *) const { 41 return false; 42} 43 44bool MipsCallEntry::isAliased(const MachineFrameInfo *) const { 45 return false; 46} 47 48bool MipsCallEntry::mayAlias(const MachineFrameInfo *) const { 49 return false; 50} 51 52void MipsCallEntry::printCustom(raw_ostream &O) const { 53 O << "MipsCallEntry: "; 54#ifndef NDEBUG 55 if (Val) 56 O << Val->getName(); 57 else 58 O << Name; 59#endif 60} 61 62MipsFunctionInfo::~MipsFunctionInfo() { 63 for (StringMap<const MipsCallEntry *>::iterator 64 I = ExternalCallEntries.begin(), E = ExternalCallEntries.end(); I != E; 65 ++I) 66 delete I->getValue(); 67 68 for (ValueMap<const GlobalValue *, const MipsCallEntry *>::iterator 69 I = GlobalCallEntries.begin(), E = GlobalCallEntries.end(); I != E; ++I) 70 delete I->second; 71} 72 73bool MipsFunctionInfo::globalBaseRegSet() const { 74 return GlobalBaseReg; 75} 76 77unsigned MipsFunctionInfo::getGlobalBaseReg() { 78 // Return if it has already been initialized. 79 if (GlobalBaseReg) 80 return GlobalBaseReg; 81 82 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 83 84 const TargetRegisterClass *RC; 85 if (ST.inMips16Mode()) 86 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 87 else 88 RC = ST.isABI_N64() ? 89 (const TargetRegisterClass*)&Mips::GPR64RegClass : 90 (const TargetRegisterClass*)&Mips::GPR32RegClass; 91 return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC); 92} 93 94bool MipsFunctionInfo::mips16SPAliasRegSet() const { 95 return Mips16SPAliasReg; 96} 97unsigned MipsFunctionInfo::getMips16SPAliasReg() { 98 // Return if it has already been initialized. 99 if (Mips16SPAliasReg) 100 return Mips16SPAliasReg; 101 102 const TargetRegisterClass *RC; 103 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 104 return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC); 105} 106 107void MipsFunctionInfo::createEhDataRegsFI() { 108 for (int I = 0; I < 4; ++I) { 109 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 110 const TargetRegisterClass *RC = ST.isABI_N64() ? 111 &Mips::GPR64RegClass : &Mips::GPR32RegClass; 112 113 EhDataRegFI[I] = MF.getFrameInfo()->CreateStackObject(RC->getSize(), 114 RC->getAlignment(), false); 115 } 116} 117 118bool MipsFunctionInfo::isEhDataRegFI(int FI) const { 119 return CallsEhReturn && (FI == EhDataRegFI[0] || FI == EhDataRegFI[1] 120 || FI == EhDataRegFI[2] || FI == EhDataRegFI[3]); 121} 122 123MachinePointerInfo MipsFunctionInfo::callPtrInfo(const StringRef &Name) { 124 StringMap<const MipsCallEntry *>::const_iterator I; 125 I = ExternalCallEntries.find(Name); 126 127 if (I != ExternalCallEntries.end()) 128 return MachinePointerInfo(I->getValue()); 129 130 const MipsCallEntry *E = ExternalCallEntries[Name] = new MipsCallEntry(Name); 131 return MachinePointerInfo(E); 132} 133 134MachinePointerInfo MipsFunctionInfo::callPtrInfo(const GlobalValue *Val) { 135 ValueMap<const GlobalValue *, const MipsCallEntry *>::const_iterator I; 136 I = GlobalCallEntries.find(Val); 137 138 if (I != GlobalCallEntries.end()) 139 return MachinePointerInfo(I->second); 140 141 const MipsCallEntry *E = GlobalCallEntries[Val] = new MipsCallEntry(Val); 142 return MachinePointerInfo(E); 143} 144 145void MipsFunctionInfo::anchor() { } 146