lib/Target/SystemZ/SystemZInstrBuilder.h

   1 //===-- SystemZInstrBuilder.h - Functions to aid building insts -*- C++ -*-===//
   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 // This file exposes functions that may be used with BuildMI from the
  11 // MachineInstrBuilder.h file to handle SystemZ'isms in a clean way.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRBUILDER_H
  16 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRBUILDER_H
  17
  18 #include "llvm/CodeGen/MachineFrameInfo.h"
  19 #include "llvm/CodeGen/MachineInstrBuilder.h"
  20 #include "llvm/CodeGen/MachineMemOperand.h"
  21 #include "llvm/CodeGen/PseudoSourceValue.h"
  22
  23 namespace llvm {
  24
  25 /// Add a BDX memory reference for frame object FI to MIB.
  26 static inline const MachineInstrBuilder &
  27 addFrameReference(const MachineInstrBuilder &MIB, int FI) {
  28   MachineInstr *MI = MIB;
  29   MachineFunction &MF = *MI->getParent()->getParent();
  30   MachineFrameInfo &MFFrame = MF.getFrameInfo();
  31   const MCInstrDesc &MCID = MI->getDesc();
  32   auto Flags = MachineMemOperand::MONone;
  33   if (MCID.mayLoad())
  34     Flags |= MachineMemOperand::MOLoad;
  35   if (MCID.mayStore())
  36     Flags |= MachineMemOperand::MOStore;
  37   int64_t Offset = 0;
  38   MachineMemOperand *MMO = MF.getMachineMemOperand(
  39       MachinePointerInfo::getFixedStack(MF, FI, Offset), Flags,
  40       MFFrame.getObjectSize(FI), MFFrame.getObjectAlignment(FI));
  41   return MIB.addFrameIndex(FI).addImm(Offset).addReg(0).addMemOperand(MMO);
  42 }
  43
  44 } // end namespace llvm
  45
  46 #endif