lib/Target/X86/X86MachineFunctionInfo.cpp

   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
  16 void X86MachineFunctionInfo::anchor() { }
  17
  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