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 &
addFrameReference(const MachineInstrBuilder & MIB,int FI)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   unsigned Flags = 0;
33   if (MCID.mayLoad())
34     Flags |= MachineMemOperand::MOLoad;
35   if (MCID.mayStore())
36     Flags |= MachineMemOperand::MOStore;
37   int64_t Offset = 0;
38   MachineMemOperand *MMO =
39     MF.getMachineMemOperand(MachinePointerInfo(
40                               PseudoSourceValue::getFixedStack(FI), Offset),
41                             Flags, MFFrame->getObjectSize(FI),
42                             MFFrame->getObjectAlignment(FI));
43   return MIB.addFrameIndex(FI).addImm(Offset).addReg(0).addMemOperand(MMO);
44 }
45 
46 } // end namespace llvm
47 
48 #endif
49