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 #include "llvm/CodeGen/PseudoSourceValue.h"
  21
  22 namespace llvm {
  23
  24 /// Add a BDX memory reference for frame object FI to MIB.
  25 static inline const MachineInstrBuilder &
  26 addFrameReference(const MachineInstrBuilder &MIB, int FI) {
  27   MachineInstr *MI = MIB;
  28   MachineFunction &MF = *MI->getParent()->getParent();
  29   MachineFrameInfo &MFFrame = MF.getFrameInfo();
  30   const MCInstrDesc &MCID = MI->getDesc();
  31   auto Flags = MachineMemOperand::MONone;
  32   if (MCID.mayLoad())
  33     Flags |= MachineMemOperand::MOLoad;
  34   if (MCID.mayStore())
  35     Flags |= MachineMemOperand::MOStore;
  36   int64_t Offset = 0;
  37   MachineMemOperand *MMO = MF.getMachineMemOperand(
  38       MachinePointerInfo::getFixedStack(MF, FI, Offset), Flags,
  39       MFFrame.getObjectSize(FI), MFFrame.getObjectAlignment(FI));
  40   return MIB.addFrameIndex(FI).addImm(Offset).addReg(0).addMemOperand(MMO);
  41 }
  42
  43 } // end namespace llvm
  44
  45 #endif