1//===-- X86MachineFunctionInfo.cpp - X86 machine function info ------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "X86MachineFunctionInfo.h"
10#include "X86RegisterInfo.h"
11#include "llvm/CodeGen/MachineRegisterInfo.h"
12#include "llvm/CodeGen/TargetSubtargetInfo.h"
13
14using namespace llvm;
15
16void X86MachineFunctionInfo::anchor() { }
17
18void X86MachineFunctionInfo::setRestoreBasePointer(const MachineFunction *MF) {
19  if (!RestoreBasePointerOffset) {
20    const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
21      MF->getSubtarget().getRegisterInfo());
22    unsigned SlotSize = RegInfo->getSlotSize();
23    for (const MCPhysReg *CSR = MF->getRegInfo().getCalleeSavedRegs();
24         unsigned Reg = *CSR; ++CSR) {
25      if (X86::GR64RegClass.contains(Reg) || X86::GR32RegClass.contains(Reg))
26        RestoreBasePointerOffset -= SlotSize;
27    }
28  }
29}
30
31