| //===-- MipsMachineFunctionInfo.cpp - Private data used for Mips ----------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MipsMachineFunction.h" |
| #include "MCTargetDesc/MipsBaseInfo.h" |
| #include "MipsInstrInfo.h" |
| #include "MipsSubtarget.h" |
| #include "llvm/CodeGen/MachineInstrBuilder.h" |
| #include "llvm/CodeGen/MachineRegisterInfo.h" |
| #include "llvm/IR/Function.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| |
| static cl::opt<bool> |
| FixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true), |
| cl::desc("Always use $gp as the global base register.")); |
| |
| // class MipsCallEntry. |
| MipsCallEntry::MipsCallEntry(const StringRef &N) { |
| #ifndef NDEBUG |
| Name = N; |
| Val = nullptr; |
| #endif |
| } |
| |
| MipsCallEntry::MipsCallEntry(const GlobalValue *V) { |
| #ifndef NDEBUG |
| Val = V; |
| #endif |
| } |
| |
| bool MipsCallEntry::isConstant(const MachineFrameInfo *) const { |
| return false; |
| } |
| |
| bool MipsCallEntry::isAliased(const MachineFrameInfo *) const { |
| return false; |
| } |
| |
| bool MipsCallEntry::mayAlias(const MachineFrameInfo *) const { |
| return false; |
| } |
| |
| void MipsCallEntry::printCustom(raw_ostream &O) const { |
| O << "MipsCallEntry: "; |
| #ifndef NDEBUG |
| if (Val) |
| O << Val->getName(); |
| else |
| O << Name; |
| #endif |
| } |
| |
| MipsFunctionInfo::~MipsFunctionInfo() { |
| for (StringMap<const MipsCallEntry *>::iterator |
| I = ExternalCallEntries.begin(), E = ExternalCallEntries.end(); I != E; |
| ++I) |
| delete I->getValue(); |
| |
| for (const auto &Entry : GlobalCallEntries) |
| delete Entry.second; |
| } |
| |
| bool MipsFunctionInfo::globalBaseRegSet() const { |
| return GlobalBaseReg; |
| } |
| |
| unsigned MipsFunctionInfo::getGlobalBaseReg() { |
| // Return if it has already been initialized. |
| if (GlobalBaseReg) |
| return GlobalBaseReg; |
| |
| const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); |
| |
| const TargetRegisterClass *RC; |
| if (ST.inMips16Mode()) |
| RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; |
| else |
| RC = ST.isABI_N64() ? |
| (const TargetRegisterClass*)&Mips::GPR64RegClass : |
| (const TargetRegisterClass*)&Mips::GPR32RegClass; |
| return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC); |
| } |
| |
| bool MipsFunctionInfo::mips16SPAliasRegSet() const { |
| return Mips16SPAliasReg; |
| } |
| unsigned MipsFunctionInfo::getMips16SPAliasReg() { |
| // Return if it has already been initialized. |
| if (Mips16SPAliasReg) |
| return Mips16SPAliasReg; |
| |
| const TargetRegisterClass *RC; |
| RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; |
| return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC); |
| } |
| |
| void MipsFunctionInfo::createEhDataRegsFI() { |
| for (int I = 0; I < 4; ++I) { |
| const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); |
| const TargetRegisterClass *RC = ST.isABI_N64() ? |
| &Mips::GPR64RegClass : &Mips::GPR32RegClass; |
| |
| EhDataRegFI[I] = MF.getFrameInfo()->CreateStackObject(RC->getSize(), |
| RC->getAlignment(), false); |
| } |
| } |
| |
| bool MipsFunctionInfo::isEhDataRegFI(int FI) const { |
| return CallsEhReturn && (FI == EhDataRegFI[0] || FI == EhDataRegFI[1] |
| || FI == EhDataRegFI[2] || FI == EhDataRegFI[3]); |
| } |
| |
| MachinePointerInfo MipsFunctionInfo::callPtrInfo(const StringRef &Name) { |
| const MipsCallEntry *&E = ExternalCallEntries[Name]; |
| |
| if (!E) |
| E = new MipsCallEntry(Name); |
| |
| return MachinePointerInfo(E); |
| } |
| |
| MachinePointerInfo MipsFunctionInfo::callPtrInfo(const GlobalValue *Val) { |
| const MipsCallEntry *&E = GlobalCallEntries[Val]; |
| |
| if (!E) |
| E = new MipsCallEntry(Val); |
| |
| return MachinePointerInfo(E); |
| } |
| |
| int MipsFunctionInfo::getMoveF64ViaSpillFI(const TargetRegisterClass *RC) { |
| if (MoveF64ViaSpillFI == -1) { |
| MoveF64ViaSpillFI = MF.getFrameInfo()->CreateStackObject( |
| RC->getSize(), RC->getAlignment(), false); |
| } |
| return MoveF64ViaSpillFI; |
| } |
| |
| void MipsFunctionInfo::anchor() { } |