X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FSystemZ%2FSystemZInstrInfo.cpp;h=be5280323c345e83cf30489dcdb7d69e22d4569c;hb=09aa3f0ef35d9241c92439d74b8d5e9a81d814c2;hp=043686cfd49d603f48b8834d2ed933f9597a7daf;hpb=2457f2c66184e978d4ed8fa9e2128effff26cb0b;p=oota-llvm.git diff --git a/lib/Target/SystemZ/SystemZInstrInfo.cpp b/lib/Target/SystemZ/SystemZInstrInfo.cpp index 043686cfd49..be5280323c3 100644 --- a/lib/Target/SystemZ/SystemZInstrInfo.cpp +++ b/lib/Target/SystemZ/SystemZInstrInfo.cpp @@ -28,28 +28,6 @@ using namespace llvm; SystemZInstrInfo::SystemZInstrInfo(SystemZTargetMachine &tm) : TargetInstrInfoImpl(SystemZInsts, array_lengthof(SystemZInsts)), RI(tm, *this), TM(tm) { - // Fill the spill offsets map - static const unsigned SpillOffsTab[][2] = { - { SystemZ::R2D, 0x10 }, - { SystemZ::R3D, 0x18 }, - { SystemZ::R4D, 0x20 }, - { SystemZ::R5D, 0x28 }, - { SystemZ::R6D, 0x30 }, - { SystemZ::R7D, 0x38 }, - { SystemZ::R8D, 0x40 }, - { SystemZ::R9D, 0x48 }, - { SystemZ::R10D, 0x50 }, - { SystemZ::R11D, 0x58 }, - { SystemZ::R12D, 0x60 }, - { SystemZ::R13D, 0x68 }, - { SystemZ::R14D, 0x70 }, - { SystemZ::R15D, 0x78 } - }; - - RegSpillOffsets.grow(SystemZ::NUM_TARGET_REGS); - - for (unsigned i = 0, e = array_lengthof(SpillOffsTab); i != e; ++i) - RegSpillOffsets[SpillOffsTab[i][0]] = SpillOffsTab[i][1]; } /// isGVStub - Return true if the GV requires an extra load to get the @@ -117,84 +95,28 @@ void SystemZInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB, addFrameReference(BuildMI(MBB, MI, DL, get(Opc), DestReg), FrameIdx); } -bool SystemZInstrInfo::copyRegToReg(MachineBasicBlock &MBB, - MachineBasicBlock::iterator I, - unsigned DestReg, unsigned SrcReg, - const TargetRegisterClass *DestRC, - const TargetRegisterClass *SrcRC, - DebugLoc DL) const { - - // Determine if DstRC and SrcRC have a common superclass. - const TargetRegisterClass *CommonRC = DestRC; - if (DestRC == SrcRC) - /* Same regclass for source and dest */; - else if (CommonRC->hasSuperClass(SrcRC)) - CommonRC = SrcRC; - else if (!CommonRC->hasSubClass(SrcRC)) - CommonRC = 0; - - if (CommonRC) { - if (CommonRC == &SystemZ::GR64RegClass || - CommonRC == &SystemZ::ADDR64RegClass) { - BuildMI(MBB, I, DL, get(SystemZ::MOV64rr), DestReg).addReg(SrcReg); - } else if (CommonRC == &SystemZ::GR32RegClass || - CommonRC == &SystemZ::ADDR32RegClass) { - BuildMI(MBB, I, DL, get(SystemZ::MOV32rr), DestReg).addReg(SrcReg); - } else if (CommonRC == &SystemZ::GR64PRegClass) { - BuildMI(MBB, I, DL, get(SystemZ::MOV64rrP), DestReg).addReg(SrcReg); - } else if (CommonRC == &SystemZ::GR128RegClass) { - BuildMI(MBB, I, DL, get(SystemZ::MOV128rr), DestReg).addReg(SrcReg); - } else if (CommonRC == &SystemZ::FP32RegClass) { - BuildMI(MBB, I, DL, get(SystemZ::FMOV32rr), DestReg).addReg(SrcReg); - } else if (CommonRC == &SystemZ::FP64RegClass) { - BuildMI(MBB, I, DL, get(SystemZ::FMOV64rr), DestReg).addReg(SrcReg); - } else { - return false; - } - - return true; - } - - if ((SrcRC == &SystemZ::GR64RegClass && - DestRC == &SystemZ::ADDR64RegClass) || - (DestRC == &SystemZ::GR64RegClass && - SrcRC == &SystemZ::ADDR64RegClass)) { - BuildMI(MBB, I, DL, get(SystemZ::MOV64rr), DestReg).addReg(SrcReg); - return true; - } else if ((SrcRC == &SystemZ::GR32RegClass && - DestRC == &SystemZ::ADDR32RegClass) || - (DestRC == &SystemZ::GR32RegClass && - SrcRC == &SystemZ::ADDR32RegClass)) { - BuildMI(MBB, I, DL, get(SystemZ::MOV32rr), DestReg).addReg(SrcReg); - return true; - } - - return false; -} - -bool -SystemZInstrInfo::isMoveInstr(const MachineInstr& MI, - unsigned &SrcReg, unsigned &DstReg, - unsigned &SrcSubIdx, unsigned &DstSubIdx) const { - switch (MI.getOpcode()) { - default: - return false; - case SystemZ::MOV32rr: - case SystemZ::MOV64rr: - case SystemZ::MOV64rrP: - case SystemZ::MOV128rr: - case SystemZ::FMOV32rr: - case SystemZ::FMOV64rr: - assert(MI.getNumOperands() >= 2 && - MI.getOperand(0).isReg() && - MI.getOperand(1).isReg() && - "invalid register-register move instruction"); - SrcReg = MI.getOperand(1).getReg(); - DstReg = MI.getOperand(0).getReg(); - SrcSubIdx = MI.getOperand(1).getSubReg(); - DstSubIdx = MI.getOperand(0).getSubReg(); - return true; - } +void SystemZInstrInfo::copyPhysReg(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I, DebugLoc DL, + unsigned DestReg, unsigned SrcReg, + bool KillSrc) const { + unsigned Opc; + if (SystemZ::GR64RegClass.contains(DestReg, SrcReg)) + Opc = SystemZ::MOV64rr; + else if (SystemZ::GR32RegClass.contains(DestReg, SrcReg)) + Opc = SystemZ::MOV32rr; + else if (SystemZ::GR64PRegClass.contains(DestReg, SrcReg)) + Opc = SystemZ::MOV64rrP; + else if (SystemZ::GR128RegClass.contains(DestReg, SrcReg)) + Opc = SystemZ::MOV128rr; + else if (SystemZ::FP32RegClass.contains(DestReg, SrcReg)) + Opc = SystemZ::FMOV32rr; + else if (SystemZ::FP64RegClass.contains(DestReg, SrcReg)) + Opc = SystemZ::FMOV64rr; + else + llvm_unreachable("Impossible reg-to-reg copy"); + + BuildMI(MBB, I, DL, get(Opc), DestReg) + .addReg(SrcReg, getKillRegState(KillSrc)); } unsigned SystemZInstrInfo::isLoadFromStackSlot(const MachineInstr *MI, @@ -267,136 +189,6 @@ unsigned SystemZInstrInfo::isStoreToStackSlot(const MachineInstr *MI, return 0; } -bool -SystemZInstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - const std::vector &CSI, - const TargetRegisterInfo *TRI) const { - if (CSI.empty()) - return false; - - DebugLoc DL; - if (MI != MBB.end()) DL = MI->getDebugLoc(); - - MachineFunction &MF = *MBB.getParent(); - SystemZMachineFunctionInfo *MFI = MF.getInfo(); - unsigned CalleeFrameSize = 0; - - // Scan the callee-saved and find the bounds of register spill area. - unsigned LowReg = 0, HighReg = 0, StartOffset = -1U, EndOffset = 0; - for (unsigned i = 0, e = CSI.size(); i != e; ++i) { - unsigned Reg = CSI[i].getReg(); - const TargetRegisterClass *RegClass = CSI[i].getRegClass(); - if (RegClass != &SystemZ::FP64RegClass) { - unsigned Offset = RegSpillOffsets[Reg]; - CalleeFrameSize += 8; - if (StartOffset > Offset) { - LowReg = Reg; StartOffset = Offset; - } - if (EndOffset < Offset) { - HighReg = Reg; EndOffset = RegSpillOffsets[Reg]; - } - } - } - - // Save information for epilogue inserter. - MFI->setCalleeSavedFrameSize(CalleeFrameSize); - MFI->setLowReg(LowReg); MFI->setHighReg(HighReg); - - // Save GPRs - if (StartOffset) { - // Build a store instruction. Use STORE MULTIPLE instruction if there are many - // registers to store, otherwise - just STORE. - MachineInstrBuilder MIB = - BuildMI(MBB, MI, DL, get((LowReg == HighReg ? - SystemZ::MOV64mr : SystemZ::MOV64mrm))); - - // Add store operands. - MIB.addReg(SystemZ::R15D).addImm(StartOffset); - if (LowReg == HighReg) - MIB.addReg(0); - MIB.addReg(LowReg, RegState::Kill); - if (LowReg != HighReg) - MIB.addReg(HighReg, RegState::Kill); - - // Do a second scan adding regs as being killed by instruction - for (unsigned i = 0, e = CSI.size(); i != e; ++i) { - unsigned Reg = CSI[i].getReg(); - // Add the callee-saved register as live-in. It's killed at the spill. - MBB.addLiveIn(Reg); - if (Reg != LowReg && Reg != HighReg) - MIB.addReg(Reg, RegState::ImplicitKill); - } - } - - // Save FPRs - for (unsigned i = 0, e = CSI.size(); i != e; ++i) { - unsigned Reg = CSI[i].getReg(); - const TargetRegisterClass *RegClass = CSI[i].getRegClass(); - if (RegClass == &SystemZ::FP64RegClass) { - MBB.addLiveIn(Reg); - storeRegToStackSlot(MBB, MI, Reg, true, CSI[i].getFrameIdx(), RegClass, - &RI); - } - } - - return true; -} - -bool -SystemZInstrInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - const std::vector &CSI, - const TargetRegisterInfo *TRI) const { - if (CSI.empty()) - return false; - - DebugLoc DL; - if (MI != MBB.end()) DL = MI->getDebugLoc(); - - MachineFunction &MF = *MBB.getParent(); - const TargetRegisterInfo *RegInfo= MF.getTarget().getRegisterInfo(); - SystemZMachineFunctionInfo *MFI = MF.getInfo(); - - // Restore FP registers - for (unsigned i = 0, e = CSI.size(); i != e; ++i) { - unsigned Reg = CSI[i].getReg(); - const TargetRegisterClass *RegClass = CSI[i].getRegClass(); - if (RegClass == &SystemZ::FP64RegClass) - loadRegFromStackSlot(MBB, MI, Reg, CSI[i].getFrameIdx(), RegClass, &RI); - } - - // Restore GP registers - unsigned LowReg = MFI->getLowReg(), HighReg = MFI->getHighReg(); - unsigned StartOffset = RegSpillOffsets[LowReg]; - - if (StartOffset) { - // Build a load instruction. Use LOAD MULTIPLE instruction if there are many - // registers to load, otherwise - just LOAD. - MachineInstrBuilder MIB = - BuildMI(MBB, MI, DL, get((LowReg == HighReg ? - SystemZ::MOV64rm : SystemZ::MOV64rmm))); - // Add store operands. - MIB.addReg(LowReg, RegState::Define); - if (LowReg != HighReg) - MIB.addReg(HighReg, RegState::Define); - - MIB.addReg((RegInfo->hasFP(MF) ? SystemZ::R11D : SystemZ::R15D)); - MIB.addImm(StartOffset); - if (LowReg == HighReg) - MIB.addReg(0); - - // Do a second scan adding regs as being defined by instruction - for (unsigned i = 0, e = CSI.size(); i != e; ++i) { - unsigned Reg = CSI[i].getReg(); - if (Reg != LowReg && Reg != HighReg) - MIB.addReg(Reg, RegState::ImplicitDefine); - } - } - - return true; -} - bool SystemZInstrInfo:: ReverseBranchCondition(SmallVectorImpl &Cond) const { assert(Cond.size() == 1 && "Invalid Xbranch condition!"); @@ -523,9 +315,8 @@ unsigned SystemZInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const { unsigned SystemZInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, MachineBasicBlock *FBB, - const SmallVectorImpl &Cond) const { - // FIXME: this should probably have a DebugLoc operand - DebugLoc DL; + const SmallVectorImpl &Cond, + DebugLoc DL) const { // Shouldn't be a fall through. assert(TBB && "InsertBranch must not be told to insert a fallthrough"); assert((Cond.size() == 1 || Cond.size() == 0) &&