| //===-- 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 "MCTargetDesc/MipsBaseInfo.h" |
| #include "MipsInstrInfo.h" |
| #include "MipsMachineFunction.h" |
| #include "MipsSubtarget.h" |
| #include "MipsTargetMachine.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(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() {} |
| |
| bool MipsFunctionInfo::globalBaseRegSet() const { |
| return GlobalBaseReg; |
| } |
| |
| unsigned MipsFunctionInfo::getGlobalBaseReg() { |
| // Return if it has already been initialized. |
| if (GlobalBaseReg) |
| return GlobalBaseReg; |
| |
| MipsSubtarget const &STI = |
| static_cast<const MipsSubtarget &>(MF.getSubtarget()); |
| |
| const TargetRegisterClass *RC = |
| STI.inMips16Mode() |
| ? &Mips::CPU16RegsRegClass |
| : STI.inMicroMipsMode() |
| ? &Mips::GPRMM16RegClass |
| : static_cast<const MipsTargetMachine &>(MF.getTarget()) |
| .getABI() |
| .IsN64() |
| ? &Mips::GPR64RegClass |
| : &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 = &Mips::CPU16RegsRegClass; |
| return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC); |
| } |
| |
| void MipsFunctionInfo::createEhDataRegsFI() { |
| for (int I = 0; I < 4; ++I) { |
| const TargetRegisterClass *RC = |
| static_cast<const MipsTargetMachine &>(MF.getTarget()).getABI().IsN64() |
| ? &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(StringRef Name) { |
| std::unique_ptr<const MipsCallEntry> &E = ExternalCallEntries[Name]; |
| |
| if (!E) |
| E = llvm::make_unique<MipsCallEntry>(Name); |
| |
| return MachinePointerInfo(E.get()); |
| } |
| |
| MachinePointerInfo MipsFunctionInfo::callPtrInfo(const GlobalValue *Val) { |
| std::unique_ptr<const MipsCallEntry> &E = GlobalCallEntries[Val]; |
| |
| if (!E) |
| E = llvm::make_unique<MipsCallEntry>(Val); |
| |
| return MachinePointerInfo(E.get()); |
| } |
| |
| int MipsFunctionInfo::getMoveF64ViaSpillFI(const TargetRegisterClass *RC) { |
| if (MoveF64ViaSpillFI == -1) { |
| MoveF64ViaSpillFI = MF.getFrameInfo()->CreateStackObject( |
| RC->getSize(), RC->getAlignment(), false); |
| } |
| return MoveF64ViaSpillFI; |
| } |
| |
| void MipsFunctionInfo::anchor() { } |