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 20 using namespace llvm; 21 22 static cl::opt<bool> 23 FixGlobalBaseReg("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. 27 MipsCallEntry::MipsCallEntry(const StringRef &N) { 28 #ifndef NDEBUG 29 Name = N; 30 Val = nullptr; 31 #endif 32 } 33 34 MipsCallEntry::MipsCallEntry(const GlobalValue *V) { 35 #ifndef NDEBUG 36 Val = V; 37 #endif 38 } 39 40 bool MipsCallEntry::isConstant(const MachineFrameInfo *) const { 41 return false; 42 } 43 44 bool MipsCallEntry::isAliased(const MachineFrameInfo *) const { 45 return false; 46 } 47 48 bool MipsCallEntry::mayAlias(const MachineFrameInfo *) const { 49 return false; 50 } 51 52 void 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 62 MipsFunctionInfo::~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 (const auto &Entry : GlobalCallEntries) 69 delete Entry.second; 70 } 71 72 bool MipsFunctionInfo::globalBaseRegSet() const { 73 return GlobalBaseReg; 74 } 75 76 unsigned MipsFunctionInfo::getGlobalBaseReg() { 77 // Return if it has already been initialized. 78 if (GlobalBaseReg) 79 return GlobalBaseReg; 80 81 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 82 83 const TargetRegisterClass *RC; 84 if (ST.inMips16Mode()) 85 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 86 else 87 RC = ST.isABI_N64() ? 88 (const TargetRegisterClass*)&Mips::GPR64RegClass : 89 (const TargetRegisterClass*)&Mips::GPR32RegClass; 90 return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC); 91 } 92 93 bool MipsFunctionInfo::mips16SPAliasRegSet() const { 94 return Mips16SPAliasReg; 95 } 96 unsigned MipsFunctionInfo::getMips16SPAliasReg() { 97 // Return if it has already been initialized. 98 if (Mips16SPAliasReg) 99 return Mips16SPAliasReg; 100 101 const TargetRegisterClass *RC; 102 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 103 return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC); 104 } 105 106 void MipsFunctionInfo::createEhDataRegsFI() { 107 for (int I = 0; I < 4; ++I) { 108 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 109 const TargetRegisterClass *RC = ST.isABI_N64() ? 110 &Mips::GPR64RegClass : &Mips::GPR32RegClass; 111 112 EhDataRegFI[I] = MF.getFrameInfo()->CreateStackObject(RC->getSize(), 113 RC->getAlignment(), false); 114 } 115 } 116 117 bool MipsFunctionInfo::isEhDataRegFI(int FI) const { 118 return CallsEhReturn && (FI == EhDataRegFI[0] || FI == EhDataRegFI[1] 119 || FI == EhDataRegFI[2] || FI == EhDataRegFI[3]); 120 } 121 122 MachinePointerInfo MipsFunctionInfo::callPtrInfo(const StringRef &Name) { 123 const MipsCallEntry *&E = ExternalCallEntries[Name]; 124 125 if (!E) 126 E = new MipsCallEntry(Name); 127 128 return MachinePointerInfo(E); 129 } 130 131 MachinePointerInfo MipsFunctionInfo::callPtrInfo(const GlobalValue *Val) { 132 const MipsCallEntry *&E = GlobalCallEntries[Val]; 133 134 if (!E) 135 E = new MipsCallEntry(Val); 136 137 return MachinePointerInfo(E); 138 } 139 140 void MipsFunctionInfo::anchor() { } 141
