X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FARM%2FThumb1InstrInfo.cpp;h=abde25081b00e6f94b722eb63e500ee87db3f418;hb=0e9c68e6bc8768143308b0162e900ba8bd10dc01;hp=02ff95071d0a04bed9c1c6db2376f96e642ed2c1;hpb=d83360694a6d82772cf31a0be8a64570c2e5cb88;p=oota-llvm.git diff --git a/lib/Target/ARM/Thumb1InstrInfo.cpp b/lib/Target/ARM/Thumb1InstrInfo.cpp index 02ff95071d0..abde25081b0 100644 --- a/lib/Target/ARM/Thumb1InstrInfo.cpp +++ b/lib/Target/ARM/Thumb1InstrInfo.cpp @@ -1,4 +1,4 @@ -//===- Thumb1InstrInfo.cpp - Thumb-1 Instruction Information --------*- C++ -*-===// +//===-- Thumb1InstrInfo.cpp - Thumb-1 Instruction Information -------------===// // // The LLVM Compiler Infrastructure // @@ -11,300 +11,102 @@ // //===----------------------------------------------------------------------===// -#include "ARMInstrInfo.h" -#include "ARM.h" -#include "ARMGenInstrInfo.inc" -#include "ARMMachineFunctionInfo.h" +#include "Thumb1InstrInfo.h" #include "llvm/CodeGen/MachineFrameInfo.h" #include "llvm/CodeGen/MachineInstrBuilder.h" -#include "llvm/ADT/SmallVector.h" -#include "Thumb1InstrInfo.h" +#include "llvm/CodeGen/MachineMemOperand.h" +#include "llvm/CodeGen/MachineRegisterInfo.h" +#include "llvm/MC/MCInst.h" using namespace llvm; Thumb1InstrInfo::Thumb1InstrInfo(const ARMSubtarget &STI) - : ARMBaseInstrInfo(STI), RI(*this, STI) { -} - -unsigned Thumb1InstrInfo::getUnindexedOpcode(unsigned Opc) const { - return 0; -} - -unsigned Thumb1InstrInfo::getOpcode(ARMII::Op Op) const { - switch (Op) { - case ARMII::ADDri: return ARM::tADDi8; - case ARMII::ADDrs: return 0; - case ARMII::ADDrr: return ARM::tADDrr; - case ARMII::B: return ARM::tB; - case ARMII::Bcc: return ARM::tBcc; - case ARMII::BX_RET: return ARM::tBX_RET; - case ARMII::LDRrr: return ARM::tLDR; - case ARMII::LDRri: return 0; - case ARMII::MOVr: return ARM::tMOVr; - case ARMII::STRrr: return ARM::tSTR; - case ARMII::STRri: return 0; - case ARMII::SUBri: return ARM::tSUBi8; - case ARMII::SUBrs: return 0; - case ARMII::SUBrr: return ARM::tSUBrr; - default: - break; - } - - return 0; -} - -bool -Thumb1InstrInfo::BlockHasNoFallThrough(const MachineBasicBlock &MBB) const { - if (MBB.empty()) return false; - - switch (MBB.back().getOpcode()) { - case ARM::tBX_RET: - case ARM::tBX_RET_vararg: - case ARM::tPOP_RET: - case ARM::tB: - case ARM::tBR_JTr: - return true; - default: - break; - } - - return false; + : ARMBaseInstrInfo(STI), RI(STI) { } -bool Thumb1InstrInfo::isMoveInstr(const MachineInstr &MI, - unsigned &SrcReg, unsigned &DstReg, - unsigned& SrcSubIdx, unsigned& DstSubIdx) const { - SrcSubIdx = DstSubIdx = 0; // No sub-registers. - - unsigned oc = MI.getOpcode(); - switch (oc) { - default: - return false; - case ARM::tMOVr: - case ARM::tMOVgpr2tgpr: - case ARM::tMOVtgpr2gpr: - case ARM::tMOVgpr2gpr: - assert(MI.getDesc().getNumOperands() >= 2 && - MI.getOperand(0).isReg() && - MI.getOperand(1).isReg() && - "Invalid Thumb MOV instruction"); - SrcReg = MI.getOperand(1).getReg(); - DstReg = MI.getOperand(0).getReg(); - return true; - } +/// getNoopForMachoTarget - Return the noop instruction to use for a noop. +void Thumb1InstrInfo::getNoopForMachoTarget(MCInst &NopInst) const { + NopInst.setOpcode(ARM::tMOVr); + NopInst.addOperand(MCOperand::CreateReg(ARM::R8)); + NopInst.addOperand(MCOperand::CreateReg(ARM::R8)); + NopInst.addOperand(MCOperand::CreateImm(ARMCC::AL)); + NopInst.addOperand(MCOperand::CreateReg(0)); } -unsigned Thumb1InstrInfo::isLoadFromStackSlot(const MachineInstr *MI, - int &FrameIndex) const { - switch (MI->getOpcode()) { - default: break; - case ARM::tRestore: - if (MI->getOperand(1).isFI() && - MI->getOperand(2).isImm() && - MI->getOperand(2).getImm() == 0) { - FrameIndex = MI->getOperand(1).getIndex(); - return MI->getOperand(0).getReg(); - } - break; - } - return 0; -} - -unsigned Thumb1InstrInfo::isStoreToStackSlot(const MachineInstr *MI, - int &FrameIndex) const { - switch (MI->getOpcode()) { - default: break; - case ARM::tSpill: - if (MI->getOperand(1).isFI() && - MI->getOperand(2).isImm() && - MI->getOperand(2).getImm() == 0) { - FrameIndex = MI->getOperand(1).getIndex(); - return MI->getOperand(0).getReg(); - } - break; - } +unsigned Thumb1InstrInfo::getUnindexedOpcode(unsigned Opc) const { return 0; } -bool Thumb1InstrInfo::copyRegToReg(MachineBasicBlock &MBB, - MachineBasicBlock::iterator I, - unsigned DestReg, unsigned SrcReg, - const TargetRegisterClass *DestRC, - const TargetRegisterClass *SrcRC) const { - DebugLoc DL = DebugLoc::getUnknownLoc(); - if (I != MBB.end()) DL = I->getDebugLoc(); - - if (DestRC == ARM::GPRRegisterClass) { - if (SrcRC == ARM::GPRRegisterClass) { - BuildMI(MBB, I, DL, get(ARM::tMOVgpr2gpr), DestReg).addReg(SrcReg); - return true; - } else if (SrcRC == ARM::tGPRRegisterClass) { - BuildMI(MBB, I, DL, get(ARM::tMOVtgpr2gpr), DestReg).addReg(SrcReg); - return true; - } - } else if (DestRC == ARM::tGPRRegisterClass) { - if (SrcRC == ARM::GPRRegisterClass) { - BuildMI(MBB, I, DL, get(ARM::tMOVgpr2tgpr), DestReg).addReg(SrcReg); - return true; - } else if (SrcRC == ARM::tGPRRegisterClass) { - BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg).addReg(SrcReg); - return true; - } - } - - return false; -} - -bool Thumb1InstrInfo:: -canFoldMemoryOperand(const MachineInstr *MI, - const SmallVectorImpl &Ops) const { - if (Ops.size() != 1) return false; - - unsigned OpNum = Ops[0]; - unsigned Opc = MI->getOpcode(); - switch (Opc) { - default: break; - case ARM::tMOVr: - case ARM::tMOVtgpr2gpr: - case ARM::tMOVgpr2tgpr: - case ARM::tMOVgpr2gpr: { - if (OpNum == 0) { // move -> store - unsigned SrcReg = MI->getOperand(1).getReg(); - if (RI.isPhysicalRegister(SrcReg) && !isARMLowRegister(SrcReg)) - // tSpill cannot take a high register operand. - return false; - } else { // move -> load - unsigned DstReg = MI->getOperand(0).getReg(); - if (RI.isPhysicalRegister(DstReg) && !isARMLowRegister(DstReg)) - // tRestore cannot target a high register operand. - return false; - } - return true; - } - } - - return false; +void Thumb1InstrInfo::copyPhysReg(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I, DebugLoc DL, + unsigned DestReg, unsigned SrcReg, + bool KillSrc) const { + AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg) + .addReg(SrcReg, getKillRegState(KillSrc))); + assert(ARM::GPRRegClass.contains(DestReg, SrcReg) && + "Thumb1 can only copy GPR registers"); } void Thumb1InstrInfo:: storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, unsigned SrcReg, bool isKill, int FI, - const TargetRegisterClass *RC) const { - DebugLoc DL = DebugLoc::getUnknownLoc(); - if (I != MBB.end()) DL = I->getDebugLoc(); - - assert(RC == ARM::tGPRRegisterClass && "Unknown regclass!"); - - if (RC == ARM::tGPRRegisterClass) { - AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tSpill)) + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const { + assert((RC == &ARM::tGPRRegClass || + (TargetRegisterInfo::isPhysicalRegister(SrcReg) && + isARMLowRegister(SrcReg))) && "Unknown regclass!"); + + if (RC == &ARM::tGPRRegClass || + (TargetRegisterInfo::isPhysicalRegister(SrcReg) && + isARMLowRegister(SrcReg))) { + DebugLoc DL; + if (I != MBB.end()) DL = I->getDebugLoc(); + + MachineFunction &MF = *MBB.getParent(); + MachineFrameInfo &MFI = *MF.getFrameInfo(); + MachineMemOperand *MMO = + MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(FI), + MachineMemOperand::MOStore, + MFI.getObjectSize(FI), + MFI.getObjectAlignment(FI)); + AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tSTRspi)) .addReg(SrcReg, getKillRegState(isKill)) - .addFrameIndex(FI).addImm(0)); + .addFrameIndex(FI).addImm(0).addMemOperand(MMO)); } } void Thumb1InstrInfo:: loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, unsigned DestReg, int FI, - const TargetRegisterClass *RC) const { - DebugLoc DL = DebugLoc::getUnknownLoc(); - if (I != MBB.end()) DL = I->getDebugLoc(); - - assert(RC == ARM::tGPRRegisterClass && "Unknown regclass!"); - - if (RC == ARM::tGPRRegisterClass) { - AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tRestore), DestReg) - .addFrameIndex(FI).addImm(0)); - } -} - -bool Thumb1InstrInfo:: -spillCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - const std::vector &CSI) const { - if (CSI.empty()) - return false; - - DebugLoc DL = DebugLoc::getUnknownLoc(); - if (MI != MBB.end()) DL = MI->getDebugLoc(); - - MachineInstrBuilder MIB = BuildMI(MBB, MI, DL, get(ARM::tPUSH)); - for (unsigned i = CSI.size(); i != 0; --i) { - unsigned Reg = CSI[i-1].getReg(); - // Add the callee-saved register as live-in. It's killed at the spill. - MBB.addLiveIn(Reg); - MIB.addReg(Reg, RegState::Kill); + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const { + assert((RC == &ARM::tGPRRegClass || + (TargetRegisterInfo::isPhysicalRegister(DestReg) && + isARMLowRegister(DestReg))) && "Unknown regclass!"); + + if (RC == &ARM::tGPRRegClass || + (TargetRegisterInfo::isPhysicalRegister(DestReg) && + isARMLowRegister(DestReg))) { + DebugLoc DL; + if (I != MBB.end()) DL = I->getDebugLoc(); + + MachineFunction &MF = *MBB.getParent(); + MachineFrameInfo &MFI = *MF.getFrameInfo(); + MachineMemOperand *MMO = + MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(FI), + MachineMemOperand::MOLoad, + MFI.getObjectSize(FI), + MFI.getObjectAlignment(FI)); + AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::tLDRspi), DestReg) + .addFrameIndex(FI).addImm(0).addMemOperand(MMO)); } - return true; } -bool Thumb1InstrInfo:: -restoreCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - const std::vector &CSI) const { - MachineFunction &MF = *MBB.getParent(); - ARMFunctionInfo *AFI = MF.getInfo(); - if (CSI.empty()) - return false; - - bool isVarArg = AFI->getVarArgsRegSaveSize() > 0; - MachineInstr *PopMI = MF.CreateMachineInstr(get(ARM::tPOP),MI->getDebugLoc()); - for (unsigned i = CSI.size(); i != 0; --i) { - unsigned Reg = CSI[i-1].getReg(); - if (Reg == ARM::LR) { - // Special epilogue for vararg functions. See emitEpilogue - if (isVarArg) - continue; - Reg = ARM::PC; - PopMI->setDesc(get(ARM::tPOP_RET)); - MI = MBB.erase(MI); - } - PopMI->addOperand(MachineOperand::CreateReg(Reg, true)); - } - - // It's illegal to emit pop instruction without operands. - if (PopMI->getNumOperands() > 0) - MBB.insert(MI, PopMI); - - return true; -} - -MachineInstr *Thumb1InstrInfo:: -foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI, - const SmallVectorImpl &Ops, int FI) const { - if (Ops.size() != 1) return NULL; - - unsigned OpNum = Ops[0]; - unsigned Opc = MI->getOpcode(); - MachineInstr *NewMI = NULL; - switch (Opc) { - default: break; - case ARM::tMOVr: - case ARM::tMOVtgpr2gpr: - case ARM::tMOVgpr2tgpr: - case ARM::tMOVgpr2gpr: { - if (OpNum == 0) { // move -> store - unsigned SrcReg = MI->getOperand(1).getReg(); - bool isKill = MI->getOperand(1).isKill(); - if (RI.isPhysicalRegister(SrcReg) && !isARMLowRegister(SrcReg)) - // tSpill cannot take a high register operand. - break; - NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tSpill)) - .addReg(SrcReg, getKillRegState(isKill)) - .addFrameIndex(FI).addImm(0)); - } else { // move -> load - unsigned DstReg = MI->getOperand(0).getReg(); - if (RI.isPhysicalRegister(DstReg) && !isARMLowRegister(DstReg)) - // tRestore cannot target a high register operand. - break; - bool isDead = MI->getOperand(0).isDead(); - NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tRestore)) - .addReg(DstReg, - RegState::Define | getDeadRegState(isDead)) - .addFrameIndex(FI).addImm(0)); - } - break; - } - } - - return NewMI; +void +Thumb1InstrInfo::expandLoadStackGuard(MachineBasicBlock::iterator MI, + Reloc::Model RM) const { + if (RM == Reloc::PIC_) + expandLoadStackGuardBase(MI, ARM::tLDRLIT_ga_pcrel, ARM::tLDRi, RM); + else + expandLoadStackGuardBase(MI, ARM::tLDRLIT_ga_abs, ARM::tLDRi, RM); }