lib/Target/ARM/Thumb1InstrInfo.cpp

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