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 
clone(BumpPtrAllocator & Allocator,MachineFunction & DestMF,const DenseMap<MachineBasicBlock *,MachineBasicBlock * > & Src2DstMBB) const16 MachineFunctionInfo *X86MachineFunctionInfo::clone(
17     BumpPtrAllocator &Allocator, MachineFunction &DestMF,
18     const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
19     const {
20   return DestMF.cloneInfo<X86MachineFunctionInfo>(*this);
21 }
22 
anchor()23 void X86MachineFunctionInfo::anchor() { }
24 
setRestoreBasePointer(const MachineFunction * MF)25 void X86MachineFunctionInfo::setRestoreBasePointer(const MachineFunction *MF) {
26   if (!RestoreBasePointerOffset) {
27     const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
28       MF->getSubtarget().getRegisterInfo());
29     unsigned SlotSize = RegInfo->getSlotSize();
30     for (const MCPhysReg *CSR = MF->getRegInfo().getCalleeSavedRegs();
31          unsigned Reg = *CSR; ++CSR) {
32       if (X86::GR64RegClass.contains(Reg) || X86::GR32RegClass.contains(Reg))
33         RestoreBasePointerOffset -= SlotSize;
34     }
35   }
36 }
37 
38