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
45