llvm/lib/Target/SystemZ/SystemZInstrBuilder.h

   1 //===-- SystemZInstrBuilder.h - Functions to aid building insts -*- C++ -*-===//
   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 // This file exposes functions that may be used with BuildMI from the
  10 // MachineInstrBuilder.h file to handle SystemZ'isms in a clean way.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRBUILDER_H
  15 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRBUILDER_H
  16
  17 #include "llvm/CodeGen/MachineFrameInfo.h"
  18 #include "llvm/CodeGen/MachineInstrBuilder.h"
  19 #include "llvm/CodeGen/MachineMemOperand.h"
  20
  21 namespace llvm {
  22
  23 /// Add a BDX memory reference for frame object FI to MIB.
  24 static inline const MachineInstrBuilder &
  25 addFrameReference(const MachineInstrBuilder &MIB, int FI) {
  26   MachineInstr *MI = MIB;
  27   MachineFunction &MF = *MI->getParent()->getParent();
  28   MachineFrameInfo &MFFrame = MF.getFrameInfo();
  29   const MCInstrDesc &MCID = MI->getDesc();
  30   auto Flags = MachineMemOperand::MONone;
  31   if (MCID.mayLoad())
  32     Flags |= MachineMemOperand::MOLoad;
  33   if (MCID.mayStore())
  34     Flags |= MachineMemOperand::MOStore;
  35   int64_t Offset = 0;
  36   MachineMemOperand *MMO = MF.getMachineMemOperand(
  37       MachinePointerInfo::getFixedStack(MF, FI, Offset), Flags,
  38       MFFrame.getObjectSize(FI), MFFrame.getObjectAlign(FI));
  39   return MIB.addFrameIndex(FI).addImm(Offset).addReg(0).addMemOperand(MMO);
  40 }
  41
  42 } // end namespace llvm
  43
  44 #endif