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 
14 using namespace llvm;
15 
anchor()16 void X86MachineFunctionInfo::anchor() { }
17 
setRestoreBasePointer(const MachineFunction * MF)18 void 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