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 19 using namespace llvm; 20 21 static cl::opt<bool> 22 FixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true), 23 cl::desc("Always use $gp as the global base register.")); 24 25 bool MipsFunctionInfo::globalBaseRegSet() const { 26 return GlobalBaseReg; 27 } 28 29 unsigned MipsFunctionInfo::getGlobalBaseReg() { 30 // Return if it has already been initialized. 31 if (GlobalBaseReg) 32 return GlobalBaseReg; 33 34 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 35 36 const TargetRegisterClass *RC; 37 if (ST.inMips16Mode()) 38 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 39 else 40 RC = ST.isABI_N64() ? 41 (const TargetRegisterClass*)&Mips::GPR64RegClass : 42 (const TargetRegisterClass*)&Mips::GPR32RegClass; 43 return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC); 44 } 45 46 bool MipsFunctionInfo::mips16SPAliasRegSet() const { 47 return Mips16SPAliasReg; 48 } 49 unsigned MipsFunctionInfo::getMips16SPAliasReg() { 50 // Return if it has already been initialized. 51 if (Mips16SPAliasReg) 52 return Mips16SPAliasReg; 53 54 const TargetRegisterClass *RC; 55 RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass; 56 return Mips16SPAliasReg = MF.getRegInfo().createVirtualRegister(RC); 57 } 58 59 void MipsFunctionInfo::createEhDataRegsFI() { 60 for (int I = 0; I < 4; ++I) { 61 const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>(); 62 const TargetRegisterClass *RC = ST.isABI_N64() ? 63 &Mips::GPR64RegClass : &Mips::GPR32RegClass; 64 65 EhDataRegFI[I] = MF.getFrameInfo()->CreateStackObject(RC->getSize(), 66 RC->getAlignment(), false); 67 } 68 } 69 70 bool MipsFunctionInfo::isEhDataRegFI(int FI) const { 71 return CallsEhReturn && (FI == EhDataRegFI[0] || FI == EhDataRegFI[1] 72 || FI == EhDataRegFI[2] || FI == EhDataRegFI[3]); 73 } 74 75 void MipsFunctionInfo::anchor() { } 76
