lib/Target/Mips/MipsABIInfo.cpp

//===---- MipsABIInfo.cpp - Information about MIPS ABI's ------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "MipsABIInfo.h"
#include "MipsRegisterInfo.h"

using namespace llvm;

namespace {
static const MCPhysReg O32IntRegs[4] = {Mips::A0, Mips::A1, Mips::A2, Mips::A3};

static const MCPhysReg Mips64IntRegs[8] = {
    Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
    Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64};
}

const ArrayRef<MCPhysReg> MipsABIInfo::GetByValArgRegs() const {
  if (IsO32())
    return makeArrayRef(O32IntRegs);
  if (IsN32() || IsN64())
    return makeArrayRef(Mips64IntRegs);
  llvm_unreachable("Unhandled ABI");
}

const ArrayRef<MCPhysReg> MipsABIInfo::GetVarArgRegs() const {
  if (IsO32())
    return makeArrayRef(O32IntRegs);
  if (IsN32() || IsN64())
    return makeArrayRef(Mips64IntRegs);
  llvm_unreachable("Unhandled ABI");
}

unsigned MipsABIInfo::GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const {
  if (IsO32())
    return CC != CallingConv::Fast ? 16 : 0;
  if (IsN32() || IsN64() || IsEABI())
    return 0;
  llvm_unreachable("Unhandled ABI");
}