MipsMachineFunction.cpp revision 267654
1290001Sglebius//===-- MipsMachineFunctionInfo.cpp - Private data used for Mips ----------===// 2290001Sglebius// 3290001Sglebius// The LLVM Compiler Infrastructure 4290001Sglebius// 5290001Sglebius// This file is distributed under the University of Illinois Open Source 6290001Sglebius// License. See LICENSE.TXT for details. 7290001Sglebius// 8290001Sglebius//===----------------------------------------------------------------------===// 9290001Sglebius 10290001Sglebius#include "MipsMachineFunction.h" 11290001Sglebius#include "MCTargetDesc/MipsBaseInfo.h" 12290001Sglebius#include "MipsInstrInfo.h" 13290001Sglebius#include "MipsSubtarget.h" 14290001Sglebius#include "llvm/CodeGen/MachineInstrBuilder.h" 15290001Sglebius#include "llvm/CodeGen/MachineRegisterInfo.h" 16290001Sglebius#include "llvm/IR/Function.h" 17290001Sglebius#include "llvm/Support/CommandLine.h" 18290001Sglebius#include "llvm/Support/raw_ostream.h" 19290001Sglebius 20290001Sglebiususing namespace llvm; 21290001Sglebius 22290001Sglebiusstatic cl::opt<bool> 23290001SglebiusFixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true), 24290001Sglebius cl::desc("Always use $gp as the global base register.")); 25290001Sglebius 26290001Sglebius// class MipsCallEntry. 27290001SglebiusMipsCallEntry::MipsCallEntry(const StringRef &N) { 28290001Sglebius#ifndef NDEBUG 29290001Sglebius Name = N; 30290001Sglebius Val = 0; 31290001Sglebius#endif 32290001Sglebius} 33290001Sglebius 34290001SglebiusMipsCallEntry::MipsCallEntry(const GlobalValue *V) { 35290001Sglebius#ifndef NDEBUG 36290001Sglebius Val = V; 37290001Sglebius#endif 38290001Sglebius} 39290001Sglebius 40290001Sglebiusbool MipsCallEntry::isConstant(const MachineFrameInfo *) const { 41290001Sglebius return false; 42290001Sglebius} 43290001Sglebius 44290001Sglebiusbool MipsCallEntry::isAliased(const MachineFrameInfo *) const { 45290001Sglebius return false; 46290001Sglebius} 47290001Sglebius 48290001Sglebiusbool MipsCallEntry::mayAlias(const MachineFrameInfo *) const { 49290001Sglebius return false; 50290001Sglebius} 51290001Sglebius 52290001Sglebiusvoid MipsCallEntry::printCustom(raw_ostream &O) const { 53290001Sglebius 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 const MipsCallEntry *&E = ExternalCallEntries[Name]; 125 126 if (!E) 127 E = new MipsCallEntry(Name); 128 129 return MachinePointerInfo(E); 130} 131 132MachinePointerInfo MipsFunctionInfo::callPtrInfo(const GlobalValue *Val) { 133 const MipsCallEntry *&E = GlobalCallEntries[Val]; 134 135 if (!E) 136 E = new MipsCallEntry(Val); 137 138 return MachinePointerInfo(E); 139} 140 141void MipsFunctionInfo::anchor() { } 142