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//===-- 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 "MipsInstrInfo.h"
#include "MipsSubtarget.h"
#include "MCTargetDesc/MipsBaseInfo.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Support/CommandLine.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."));
bool MipsFunctionInfo::globalBaseRegFixed() const {
return FixGlobalBaseReg;
}
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>();
if (FixGlobalBaseReg) // $gp is the global base register.
return GlobalBaseReg = ST.isABI_N64() ? Mips::GP_64 : Mips::GP;
const TargetRegisterClass *RC = ST.isABI_N64() ?
(const TargetRegisterClass*)&Mips::CPU64RegsRegClass :
(const TargetRegisterClass*)&Mips::CPURegsRegClass;
return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC);
}
void MipsFunctionInfo::anchor() { }
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