1 //===-- Thumb1InstrInfo.cpp - Thumb-1 Instruction Information -------------===//
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 contains the Thumb-1 implementation of the TargetInstrInfo class.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "Thumb1InstrInfo.h"
15 #include "llvm/CodeGen/MachineFrameInfo.h"
16 #include "llvm/CodeGen/MachineInstrBuilder.h"
17 #include "llvm/CodeGen/MachineMemOperand.h"
18 #include "llvm/CodeGen/MachineRegisterInfo.h"
19 #include "llvm/MC/MCInst.h"
20
21 using namespace llvm;
22
Thumb1InstrInfo(const ARMSubtarget & STI)23 Thumb1InstrInfo::Thumb1InstrInfo(const ARMSubtarget &STI)
24 : ARMBaseInstrInfo(STI), RI(STI) {
25 }
26
27 /// getNoopForMachoTarget - Return the noop instruction to use for a noop.
getNoopForMachoTarget(MCInst & NopInst) const28 void Thumb1InstrInfo::getNoopForMachoTarget(MCInst &NopInst) const {
29 NopInst.setOpcode(ARM::tMOVr);
30 NopInst.addOperand(MCOperand::CreateReg(ARM::R8));
31 NopInst.addOperand(MCOperand::CreateReg(ARM::R8));
32 NopInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
33 NopInst.addOperand(MCOperand::CreateReg(0));
34 }
35
getUnindexedOpcode(unsigned Opc) const36 unsigned Thumb1InstrInfo::getUnindexedOpcode(unsigned Opc) const {
37 return 0;
38 }
39
copyPhysReg(MachineBasicBlock & MBB,MachineBasicBlock::iterator I,DebugLoc DL,unsigned DestReg,unsigned SrcReg,bool KillSrc) const40 void Thumb1InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
41 MachineBasicBlock::iterator I, DebugLoc DL,
42 unsigned DestReg, unsigned SrcReg,
43 bool KillSrc) const {
44 AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg)
45 .addReg(SrcReg, getKillRegState(KillSrc)));
46 assert(ARM::GPRRegClass.contains(DestReg, SrcReg) &&
47 "Thumb1 can only copy GPR registers");
48 }
49
50 void Thumb1InstrInfo::
storeRegToStackSlot(MachineBasicBlock & MBB,MachineBasicBlock::iterator I,unsigned SrcReg,bool isKill,int FI,const TargetRegisterClass * RC,const TargetRegisterInfo * TRI) const51 storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
52 unsigned SrcReg, bool isKill, int FI,
53 const TargetRegisterClass *RC,
54 const TargetRegisterInfo *TRI) const {
55 assert((RC == &ARM::tGPRRegClass ||
56 (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
57 isARMLowRegister(SrcReg))) && "Unknown regclass!");
58
59 if (RC == &ARM::tGPRRegClass ||
60 (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
61 isARMLowRegister(SrcReg))) {
62 DebugLoc DL;
63 if (I != MBB.end()) DL = I->getDebugLoc();
64
65 MachineFunction &MF = *MBB.getParent();
66 MachineFrameInfo &MFI = *MF.getFrameInfo();
67 MachineMemOperand *MMO =
68 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
69 MachineMemOperand::MOStore,
70 MFI.getObjectSize(FI),
71 MFI.getObjectAlignment(FI));
72 AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tSTRspi))
73 .addReg(SrcReg, getKillRegState(isKill))
74 .addFrameIndex(FI).addImm(0).addMemOperand(MMO));
75 }
76 }
77
78 void Thumb1InstrInfo::
loadRegFromStackSlot(MachineBasicBlock & MBB,MachineBasicBlock::iterator I,unsigned DestReg,int FI,const TargetRegisterClass * RC,const TargetRegisterInfo * TRI) const79 loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
80 unsigned DestReg, int FI,
81 const TargetRegisterClass *RC,
82 const TargetRegisterInfo *TRI) const {
83 assert((RC == &ARM::tGPRRegClass ||
84 (TargetRegisterInfo::isPhysicalRegister(DestReg) &&
85 isARMLowRegister(DestReg))) && "Unknown regclass!");
86
87 if (RC == &ARM::tGPRRegClass ||
88 (TargetRegisterInfo::isPhysicalRegister(DestReg) &&
89 isARMLowRegister(DestReg))) {
90 DebugLoc DL;
91 if (I != MBB.end()) DL = I->getDebugLoc();
92
93 MachineFunction &MF = *MBB.getParent();
94 MachineFrameInfo &MFI = *MF.getFrameInfo();
95 MachineMemOperand *MMO =
96 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
97 MachineMemOperand::MOLoad,
98 MFI.getObjectSize(FI),
99 MFI.getObjectAlignment(FI));
100 AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tLDRspi), DestReg)
101 .addFrameIndex(FI).addImm(0).addMemOperand(MMO));
102 }
103 }
104