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1 //===-- X86MachineFuctionInfo.cpp - X86 machine function info -------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "X86MachineFunctionInfo.h"
11 #include "X86RegisterInfo.h"
12 #include "llvm/Target/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 =
24       RegInfo->X86RegisterInfo::getCalleeSavedRegs(MF);
25       unsigned Reg = *CSR;
26        ++CSR)
27     {
28       if (X86::GR64RegClass.contains(Reg) || X86::GR32RegClass.contains(Reg))
29         RestoreBasePointerOffset -= SlotSize;
30     }
31   }
32 }
33 
34