lib/Target/ARM/Thumb1InstrInfo.cpp

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