llvm/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 MachineFunctionInfo *X86MachineFunctionInfo::clone(
  17     BumpPtrAllocator &Allocator, MachineFunction &DestMF,
  18     const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
  19     const {
  20   return DestMF.cloneInfo<X86MachineFunctionInfo>(*this);
  21 }
  22
  23 void X86MachineFunctionInfo::anchor() { }
  24
  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