[CodeGen] Additional Register argument to storeRegToStackSlot/loadRegFromStackSlot

[cdevadas]

Summary

With D134950, targets get notified when a virtual register is created and/or
cloned. Targets can do the needful with the delegate callback. AMDGPU propagates
the virtual register flags maintained in the target file itself. They are useful
to identify a certain type of machine operands while inserting spill stores and
reloads. Since RegAllocFast spills the physical register itself, there is no way
its virtual register can be mapped back to retrieve the flags. It can be solved
by passing the virtual register as an additional argument. This argument has no
use when the spill interfaces are called during the greedy allocator or even the
PrologEpilogInserter and can pass a null register in such cases.

[cdevadas]

This is a better and a stable approach than D138515.
The use case of the extra argument can be found in D124196. See the implementations SIInstrInfo::storeRegToStackSlot and SIInstrInfo::loadRegFromStackSlot.

[cdevadas]

Ping

[cdevadas]

Ping. Much appreciate if this can be reviewed.

[cdevadas]

Ping

[arsenm]

llvm/include/llvm/CodeGen/TargetInstrInfo.h

1062–1068

State what VReg is before stating why it's here

[cdevadas]

Addressed the review comment.

[arsenm]

llvm/include/llvm/CodeGen/TargetInstrInfo.h

1063

Still think the phrasing could be improved. How about something like:

If \p SrcReg is being directly spilled as part of assigning a virtual register, \p VReg is the virtual register being assigned.

[cdevadas]

Fixed the comment appropriately.

[cdevadas]

I will wait for a couple of days before I upstream it to see if there is any comment from others.

llvm/include/llvm/CodeGen/TargetInstrInfo.h

virtual bool getConstValDefinedInReg(const MachineInstr &MI,
                                        const Register Reg,
                                        int64_t &ImmVal) const {
     return false;
   }
 
   /// Store the specified register of the given register class to the specified
   /// stack frame index. The store instruction is to be added to the given
   /// machine basic block before the specified machine instruction. If isKill
-  /// is true, the register operand is the last use and must be marked kill.
+  /// is true, the register operand is the last use and must be marked kill. If
+  /// \p SrcReg is being directly spilled as part of assigning a virtual
+  /// register, \p VReg is the register being assigned. This additional register
+  /// argument is needed for certain targets when invoked from RegAllocFast to
+  /// map the spilled physical register to its virtual register. A null register
+  /// can be passed elsewhere.
   virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator MI,
                                    Register SrcReg, bool isKill, int FrameIndex,
                                    const TargetRegisterClass *RC,
-                                   const TargetRegisterInfo *TRI) const {
+                                   const TargetRegisterInfo *TRI,
+                                   Register VReg) const {
     llvm_unreachable("Target didn't implement "
                      "TargetInstrInfo::storeRegToStackSlot!");
   }
 
   /// Load the specified register of the given register class from the specified
   /// stack frame index. The load instruction is to be added to the given
-  /// machine basic block before the specified machine instruction.
+  /// machine basic block before the specified machine instruction. If \p
+  /// DestReg is being directly reloaded as part of assigning a virtual
+  /// register, \p VReg is the register being assigned. This additional register
+  /// argument is needed for certain targets when invoked from RegAllocFast to
+  /// map the loaded physical register to its virtual register. A null register
+  /// can be passed elsewhere.
   virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
                                     MachineBasicBlock::iterator MI,
                                     Register DestReg, int FrameIndex,
                                     const TargetRegisterClass *RC,
-                                    const TargetRegisterInfo *TRI) const {
+                                    const TargetRegisterInfo *TRI,
+                                    Register VReg) const {
     llvm_unreachable("Target didn't implement "
                      "TargetInstrInfo::loadRegFromStackSlot!");
   }
 
   /// This function is called for all pseudo instructions
   /// that remain after register allocation. Many pseudo instructions are
   /// created to help register allocation. This is the place to convert them
   /// into real instructions. The target can edit MI in place, or it can insert

llvm/lib/CodeGen/FixupStatepointCallerSaved.cpp

for (Register Reg : RegsToSpill) {
 
       // Perform trivial copy propagation
       bool IsKill = true;
       MachineBasicBlock::iterator InsertBefore(MI);
       Reg = performCopyPropagation(Reg, InsertBefore, IsKill, TII, TRI);
 
       LLVM_DEBUG(dbgs() << "Insert spill before " << *InsertBefore);
       TII.storeRegToStackSlot(*MI.getParent(), InsertBefore, Reg, IsKill, FI,
-                              RC, &TRI);
+                              RC, &TRI, Register());
     }
   }
 
   void insertReloadBefore(unsigned Reg, MachineBasicBlock::iterator It,
                           MachineBasicBlock *MBB) {
     const TargetRegisterClass *RC = TRI.getMinimalPhysRegClass(Reg);
     int FI = RegToSlotIdx[Reg];
     if (It != MBB->end()) {
-      TII.loadRegFromStackSlot(*MBB, It, Reg, FI, RC, &TRI);
+      TII.loadRegFromStackSlot(*MBB, It, Reg, FI, RC, &TRI, Register());
       return;
     }
 
     // To insert reload at the end of MBB, insert it before last instruction
     // and then swap them.
     assert(!MBB->empty() && "Empty block");
     --It;
-    TII.loadRegFromStackSlot(*MBB, It, Reg, FI, RC, &TRI);
+    TII.loadRegFromStackSlot(*MBB, It, Reg, FI, RC, &TRI, Register());
     MachineInstr *Reload = It->getPrevNode();
     int Dummy = 0;
     (void)Dummy;
     assert(TII.isLoadFromStackSlot(*Reload, Dummy) == Reg);
     assert(Dummy == FI);
     MBB->remove(Reload);
     MBB->insertAfter(It, Reload);
   }

llvm/lib/CodeGen/InlineSpiller.cpp

else {
     MachineInstr *DefMI = LIS.getInstructionFromIndex(SrcVNI->def);
     assert(DefMI && "Defining instruction disappeared");
     MII = DefMI;
     ++MII;
   }
   MachineInstrSpan MIS(MII, MBB);
   // Insert spill without kill flag immediately after def.
   TII.storeRegToStackSlot(*MBB, MII, SrcReg, false, StackSlot,
-                          MRI.getRegClass(SrcReg), &TRI);
+                          MRI.getRegClass(SrcReg), &TRI, Register());
   LIS.InsertMachineInstrRangeInMaps(MIS.begin(), MII);
   for (const MachineInstr &MI : make_range(MIS.begin(), MII))
     getVDefInterval(MI, LIS);
   --MII; // Point to store instruction.
   LLVM_DEBUG(dbgs() << "\thoisted: " << SrcVNI->def << '\t' << *MII);
 
   // If there is only 1 store instruction is required for spill, add it
   // to mergeable list. In X86 AMX, 2 intructions are required to store.

 
 void InlineSpiller::insertReload(Register NewVReg,
                                  SlotIndex Idx,
                                  MachineBasicBlock::iterator MI) {
   MachineBasicBlock &MBB = *MI->getParent();
 
   MachineInstrSpan MIS(MI, &MBB);
   TII.loadRegFromStackSlot(MBB, MI, NewVReg, StackSlot,
-                           MRI.getRegClass(NewVReg), &TRI);
+                           MRI.getRegClass(NewVReg), &TRI, Register());
 
   LIS.InsertMachineInstrRangeInMaps(MIS.begin(), MI);
 
   LLVM_DEBUG(dumpMachineInstrRangeWithSlotIndex(MIS.begin(), MI, LIS, "reload",
                                                 NewVReg));
   ++NumReloads;
 }
 
void InlineSpiller::insertSpill(Register NewVReg, bool isKill,
   MachineBasicBlock &MBB = *MI->getParent();
 
   MachineInstrSpan MIS(MI, &MBB);
   MachineBasicBlock::iterator SpillBefore = std::next(MI);
   bool IsRealSpill = isRealSpill(*MI);
 
   if (IsRealSpill)
     TII.storeRegToStackSlot(MBB, SpillBefore, NewVReg, isKill, StackSlot,
-                            MRI.getRegClass(NewVReg), &TRI);
+                            MRI.getRegClass(NewVReg), &TRI, Register());
   else
     // Don't spill undef value.
     // Anything works for undef, in particular keeping the memory
     // uninitialized is a viable option and it saves code size and
     // run time.
     BuildMI(MBB, SpillBefore, MI->getDebugLoc(), TII.get(TargetOpcode::KILL))
         .addReg(NewVReg, getKillRegState(isKill));
 
for (auto &Ent : MergeableSpills) {
 
     // Insert hoisted spills.
     for (auto const &Insert : SpillsToIns) {
       MachineBasicBlock *BB = Insert.first;
       Register LiveReg = Insert.second;
       MachineBasicBlock::iterator MII = IPA.getLastInsertPointIter(OrigLI, *BB);
       MachineInstrSpan MIS(MII, BB);
       TII.storeRegToStackSlot(*BB, MII, LiveReg, false, Slot,
-                              MRI.getRegClass(LiveReg), &TRI);
+                              MRI.getRegClass(LiveReg), &TRI, Register());
       LIS.InsertMachineInstrRangeInMaps(MIS.begin(), MII);
       for (const MachineInstr &MI : make_range(MIS.begin(), MII))
         getVDefInterval(MI, LIS);
       ++NumSpills;
     }
 
     // Remove redundant spills or change them to dead instructions.
     NumSpills -= SpillsToRm.size();

llvm/lib/CodeGen/PrologEpilogInserter.cpp

for (const CalleeSavedInfo &CS : CSI) {
 
       if (CS.isSpilledToReg()) {
         BuildMI(SaveBlock, I, DebugLoc(),
                 TII.get(TargetOpcode::COPY), CS.getDstReg())
           .addReg(Reg, getKillRegState(true));
       } else {
         const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
         TII.storeRegToStackSlot(SaveBlock, I, Reg, true, CS.getFrameIdx(), RC,
-                                TRI);
+                                TRI, Register());
       }
     }
   }
 }
 
 /// Insert restore code for the callee-saved registers used in the function.
 static void insertCSRRestores(MachineBasicBlock &RestoreBlock,
                               std::vector<CalleeSavedInfo> &CSI) {
static void insertCSRRestores(MachineBasicBlock &RestoreBlock,
   if (!TFI->restoreCalleeSavedRegisters(RestoreBlock, I, CSI, TRI)) {
     for (const CalleeSavedInfo &CI : reverse(CSI)) {
       unsigned Reg = CI.getReg();
       if (CI.isSpilledToReg()) {
         BuildMI(RestoreBlock, I, DebugLoc(), TII.get(TargetOpcode::COPY), Reg)
           .addReg(CI.getDstReg(), getKillRegState(true));
       } else {
         const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-        TII.loadRegFromStackSlot(RestoreBlock, I, Reg, CI.getFrameIdx(), RC, TRI);
+        TII.loadRegFromStackSlot(RestoreBlock, I, Reg, CI.getFrameIdx(), RC,
+                                 TRI, Register());
         assert(I != RestoreBlock.begin() &&
                "loadRegFromStackSlot didn't insert any code!");
         // Insert in reverse order.  loadRegFromStackSlot can insert
         // multiple instructions.
       }
     }
   }
 }

llvm/lib/CodeGen/RegAllocFast.cpp

 void RegAllocFast::spill(MachineBasicBlock::iterator Before, Register VirtReg,
                          MCPhysReg AssignedReg, bool Kill, bool LiveOut) {
   LLVM_DEBUG(dbgs() << "Spilling " << printReg(VirtReg, TRI)
                     << " in " << printReg(AssignedReg, TRI));
   int FI = getStackSpaceFor(VirtReg);
   LLVM_DEBUG(dbgs() << " to stack slot #" << FI << '\n');
 
   const TargetRegisterClass &RC = *MRI->getRegClass(VirtReg);
-  TII->storeRegToStackSlot(*MBB, Before, AssignedReg, Kill, FI, &RC, TRI);
+  TII->storeRegToStackSlot(*MBB, Before, AssignedReg, Kill, FI, &RC, TRI,
+                           VirtReg);
   ++NumStores;
 
   MachineBasicBlock::iterator FirstTerm = MBB->getFirstTerminator();
 
   // When we spill a virtual register, we will have spill instructions behind
   // every definition of it, meaning we can switch all the DBG_VALUEs over
   // to just reference the stack slot.
   SmallVectorImpl<MachineOperand *> &LRIDbgOperands = LiveDbgValueMap[VirtReg];

 
 /// Insert reload instruction for \p PhysReg before \p Before.
 void RegAllocFast::reload(MachineBasicBlock::iterator Before, Register VirtReg,
                           MCPhysReg PhysReg) {
   LLVM_DEBUG(dbgs() << "Reloading " << printReg(VirtReg, TRI) << " into "
                     << printReg(PhysReg, TRI) << '\n');
   int FI = getStackSpaceFor(VirtReg);
   const TargetRegisterClass &RC = *MRI->getRegClass(VirtReg);
-  TII->loadRegFromStackSlot(*MBB, Before, PhysReg, FI, &RC, TRI);
+  TII->loadRegFromStackSlot(*MBB, Before, PhysReg, FI, &RC, TRI, VirtReg);
   ++NumLoads;
 }
 
 /// Get basic block begin insertion point.
 /// This is not just MBB.begin() because surprisingly we have EH_LABEL
 /// instructions marking the begin of a basic block. This means we must insert
 /// new instructions after such labels...
 MachineBasicBlock::iterator

llvm/lib/CodeGen/RegisterScavenging.cpp

if (!TRI->saveScavengerRegister(*MBB, Before, UseMI, &RC, Reg)) {
     int FI = Scavenged[SI].FrameIndex;
     if (FI < FIB || FI >= FIE) {
       report_fatal_error(Twine("Error while trying to spill ") +
                          TRI->getName(Reg) + " from class " +
                          TRI->getRegClassName(&RC) +
                          ": Cannot scavenge register without an emergency "
                          "spill slot!");
     }
-    TII->storeRegToStackSlot(*MBB, Before, Reg, true, FI, &RC, TRI);
+    TII->storeRegToStackSlot(*MBB, Before, Reg, true, FI, &RC, TRI, Register());
     MachineBasicBlock::iterator II = std::prev(Before);
 
     unsigned FIOperandNum = getFrameIndexOperandNum(*II);
     TRI->eliminateFrameIndex(II, SPAdj, FIOperandNum, this);
 
     // Restore the scavenged register before its use (or first terminator).
-    TII->loadRegFromStackSlot(*MBB, UseMI, Reg, FI, &RC, TRI);
+    TII->loadRegFromStackSlot(*MBB, UseMI, Reg, FI, &RC, TRI, Register());
     II = std::prev(UseMI);
 
     FIOperandNum = getFrameIndexOperandNum(*II);
     TRI->eliminateFrameIndex(II, SPAdj, FIOperandNum, this);
   }
   return Scavenged[SI];
 }
 

llvm/lib/CodeGen/TargetInstrInfo.cpp

MachineInstr *TargetInstrInfo::foldMemoryOperand(MachineInstr &MI,
   const TargetRegisterClass *RC = canFoldCopy(MI, Ops[0]);
   if (!RC)
     return nullptr;
 
   const MachineOperand &MO = MI.getOperand(1 - Ops[0]);
   MachineBasicBlock::iterator Pos = MI;
 
   if (Flags == MachineMemOperand::MOStore)
-    storeRegToStackSlot(*MBB, Pos, MO.getReg(), MO.isKill(), FI, RC, TRI);
+    storeRegToStackSlot(*MBB, Pos, MO.getReg(), MO.isKill(), FI, RC, TRI,
+                        Register());
   else
-    loadRegFromStackSlot(*MBB, Pos, MO.getReg(), FI, RC, TRI);
+    loadRegFromStackSlot(*MBB, Pos, MO.getReg(), FI, RC, TRI, Register());
   return &*--Pos;
 }
 
 MachineInstr *TargetInstrInfo::foldMemoryOperand(MachineInstr &MI,
                                                  ArrayRef<unsigned> Ops,
                                                  MachineInstr &LoadMI,
                                                  LiveIntervals *LIS) const {
   assert(LoadMI.canFoldAsLoad() && "LoadMI isn't foldable!");

llvm/lib/Target/AArch64/AArch64InstrInfo.h

public:
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI, Register SrcReg,
                            bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   // This tells target independent code that it is okay to pass instructions
   // with subreg operands to foldMemoryOperandImpl.
   bool isSubregFoldable() const override { return true; }
 
   using TargetInstrInfo::foldMemoryOperandImpl;
   MachineInstr *
   foldMemoryOperandImpl(MachineFunction &MF, MachineInstr &MI,

llvm/lib/Target/AArch64/AArch64InstrInfo.cpp

static void storeRegPairToStackSlot(const TargetRegisterInfo &TRI,
   BuildMI(MBB, InsertBefore, DebugLoc(), MCID)
       .addReg(SrcReg0, getKillRegState(IsKill), SubIdx0)
       .addReg(SrcReg1, getKillRegState(IsKill), SubIdx1)
       .addFrameIndex(FI)
       .addImm(0)
       .addMemOperand(MMO);
 }
 
-void AArch64InstrInfo::storeRegToStackSlot(
-    MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register SrcReg,
-    bool isKill, int FI, const TargetRegisterClass *RC,
-    const TargetRegisterInfo *TRI) const {
+void AArch64InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+                                           MachineBasicBlock::iterator MBBI,
+                                           Register SrcReg, bool isKill, int FI,
+                                           const TargetRegisterClass *RC,
+                                           const TargetRegisterInfo *TRI,
+                                           Register VReg) const {
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
 
   MachinePointerInfo PtrInfo = MachinePointerInfo::getFixedStack(MF, FI);
   MachineMemOperand *MMO =
       MF.getMachineMemOperand(PtrInfo, MachineMemOperand::MOStore,
                               MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
   unsigned Opc = 0;
static void loadRegPairFromStackSlot(const TargetRegisterInfo &TRI,
   BuildMI(MBB, InsertBefore, DebugLoc(), MCID)
       .addReg(DestReg0, RegState::Define | getUndefRegState(IsUndef), SubIdx0)
       .addReg(DestReg1, RegState::Define | getUndefRegState(IsUndef), SubIdx1)
       .addFrameIndex(FI)
       .addImm(0)
       .addMemOperand(MMO);
 }
 
-void AArch64InstrInfo::loadRegFromStackSlot(
-    MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register DestReg,
-    int FI, const TargetRegisterClass *RC,
-    const TargetRegisterInfo *TRI) const {
+void AArch64InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                            MachineBasicBlock::iterator MBBI,
+                                            Register DestReg, int FI,
+                                            const TargetRegisterClass *RC,
+                                            const TargetRegisterInfo *TRI,
+                                            Register VReg) const {
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   MachinePointerInfo PtrInfo = MachinePointerInfo::getFixedStack(MF, FI);
   MachineMemOperand *MMO =
       MF.getMachineMemOperand(PtrInfo, MachineMemOperand::MOLoad,
                               MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
 
   unsigned Opc = 0;
if (MI.isCopy() && Ops.size() == 1 &&
     };
 
     if (DstMO.getSubReg() == 0 && SrcMO.getSubReg() == 0) {
       assert(TRI.getRegSizeInBits(*getRegClass(DstReg)) ==
                  TRI.getRegSizeInBits(*getRegClass(SrcReg)) &&
              "Mismatched register size in non subreg COPY");
       if (IsSpill)
         storeRegToStackSlot(MBB, InsertPt, SrcReg, SrcMO.isKill(), FrameIndex,
-                            getRegClass(SrcReg), &TRI);
+                            getRegClass(SrcReg), &TRI, Register());
       else
         loadRegFromStackSlot(MBB, InsertPt, DstReg, FrameIndex,
-                             getRegClass(DstReg), &TRI);
+                             getRegClass(DstReg), &TRI, Register());
       return &*--InsertPt;
     }
 
     // Handle cases like spilling def of:
     //
     //   %0:sub_32<def,read-undef> = COPY %wzr; GPR64common:%0
     //
     // where the physical register source can be widened and stored to the full
if (IsSpill && DstMO.isUndef() && Register::isPhysicalRegister(SrcReg)) {
           SpillRC = nullptr;
         break;
       }
 
       if (SpillRC)
         if (unsigned WidenedSrcReg =
                 TRI.getMatchingSuperReg(SrcReg, SpillSubreg, SpillRC)) {
           storeRegToStackSlot(MBB, InsertPt, WidenedSrcReg, SrcMO.isKill(),
-                              FrameIndex, SpillRC, &TRI);
+                              FrameIndex, SpillRC, &TRI, Register());
           return &*--InsertPt;
         }
     }
 
     // Handle cases like filling use of:
     //
     //   %0:sub_32<def,read-undef> = COPY %1; GPR64:%0, GPR32:%1
     //
if (IsFill && SrcMO.getSubReg() == 0 && DstMO.isUndef()) {
         FillRC = &AArch64::FPR64RegClass;
         break;
       }
 
       if (FillRC) {
         assert(TRI.getRegSizeInBits(*getRegClass(SrcReg)) ==
                    TRI.getRegSizeInBits(*FillRC) &&
                "Mismatched regclass size on folded subreg COPY");
-        loadRegFromStackSlot(MBB, InsertPt, DstReg, FrameIndex, FillRC, &TRI);
+        loadRegFromStackSlot(MBB, InsertPt, DstReg, FrameIndex, FillRC, &TRI,
+                             Register());
         MachineInstr &LoadMI = *--InsertPt;
         MachineOperand &LoadDst = LoadMI.getOperand(0);
         assert(LoadDst.getSubReg() == 0 && "unexpected subreg on fill load");
         LoadDst.setSubReg(DstMO.getSubReg());
         LoadDst.setIsUndef();
         return &LoadMI;
       }
     }

llvm/lib/Target/AMDGPU/SIInstrInfo.h

public:
   Register insertEQ(MachineBasicBlock *MBB,
                     MachineBasicBlock::iterator I, const DebugLoc &DL,
                     Register SrcReg, int Value)  const;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI, Register SrcReg,
                            bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   bool expandPostRAPseudo(MachineInstr &MI) const override;
 
   // Splits a V_MOV_B64_DPP_PSEUDO opcode into a pair of v_mov_b32_dpp
   // instructions. Returns a pair of generated instructions.
   // Can split either post-RA with physical registers or pre-RA with
   // virtual registers. In latter case IR needs to be in SSA form and
   // and a REG_SEQUENCE is produced to define original register.

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

case 64:
     return AMDGPU::SI_SPILL_AV512_SAVE;
   case 128:
     return AMDGPU::SI_SPILL_AV1024_SAVE;
   default:
     llvm_unreachable("unknown register size");
   }
 }
 
-void SIInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                      MachineBasicBlock::iterator MI,
-                                      Register SrcReg, bool isKill,
-                                      int FrameIndex,
-                                      const TargetRegisterClass *RC,
-                                      const TargetRegisterInfo *TRI) const {
+void SIInstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register SrcReg,
+    bool isKill, int FrameIndex, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   MachineFunction *MF = MBB.getParent();
   SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
   MachineFrameInfo &FrameInfo = MF->getFrameInfo();
   const DebugLoc &DL = MBB.findDebugLoc(MI);
 
   MachinePointerInfo PtrInfo
     = MachinePointerInfo::getFixedStack(*MF, FrameIndex);
   MachineMemOperand *MMO = MF->getMachineMemOperand(
default:
     llvm_unreachable("unknown register size");
   }
 }
 
 void SIInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                        MachineBasicBlock::iterator MI,
                                        Register DestReg, int FrameIndex,
                                        const TargetRegisterClass *RC,
-                                       const TargetRegisterInfo *TRI) const {
+                                       const TargetRegisterInfo *TRI,
+                                       Register VReg) const {
   MachineFunction *MF = MBB.getParent();
   SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
   MachineFrameInfo &FrameInfo = MF->getFrameInfo();
   const DebugLoc &DL = MBB.findDebugLoc(MI);
   unsigned SpillSize = TRI->getSpillSize(*RC);
 
   MachinePointerInfo PtrInfo
     = MachinePointerInfo::getFixedStack(*MF, FrameIndex);

llvm/lib/Target/AMDGPU/SILowerSGPRSpills.cpp

for (const CalleeSavedInfo &CS : CSI) {
           Reg, Reg == RI->getReturnAddressReg(MF) ? MVT::i64 : MVT::i32);
 
       // If this value was already livein, we probably have a direct use of the
       // incoming register value, so don't kill at the spill point. This happens
       // since we pass some special inputs (workgroup IDs) in the callee saved
       // range.
       const bool IsLiveIn = MRI.isLiveIn(Reg);
       TII.storeRegToStackSlot(SaveBlock, I, Reg, !IsLiveIn, CS.getFrameIdx(),
-                              RC, TRI);
+                              RC, TRI, Register());
 
       if (Indexes) {
         assert(std::distance(MIS.begin(), I) == 1);
         MachineInstr &Inst = *std::prev(I);
         Indexes->insertMachineInstrInMaps(Inst);
       }
 
       if (LIS)
static void insertCSRRestores(MachineBasicBlock &RestoreBlock,
 
   // FIXME: Just emit the readlane/writelane directly
   if (!TFI->restoreCalleeSavedRegisters(RestoreBlock, I, CSI, TRI)) {
     for (const CalleeSavedInfo &CI : reverse(CSI)) {
       Register Reg = CI.getReg();
       const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(
           Reg, Reg == RI->getReturnAddressReg(MF) ? MVT::i64 : MVT::i32);
 
-      TII.loadRegFromStackSlot(RestoreBlock, I, Reg, CI.getFrameIdx(), RC, TRI);
+      TII.loadRegFromStackSlot(RestoreBlock, I, Reg, CI.getFrameIdx(), RC, TRI,
+                               Register());
       assert(I != RestoreBlock.begin() &&
              "loadRegFromStackSlot didn't insert any code!");
       // Insert in reverse order.  loadRegFromStackSlot can insert
       // multiple instructions.
 
       if (Indexes) {
         MachineInstr &Inst = *std::prev(I);
         Indexes->insertMachineInstrInMaps(Inst);

llvm/lib/Target/ARC/ARCInstrInfo.h

public:
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI, Register SrcReg,
                            bool IsKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   bool
   reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
 
 
   bool isPostIncrement(const MachineInstr &MI) const override;
 
   // ARC-specific

llvm/lib/Target/ARC/ARCInstrInfo.cpp

void ARCInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
   assert(ARC::GPR32RegClass.contains(SrcReg) &&
          "Only GPR32 src copy supported.");
   assert(ARC::GPR32RegClass.contains(DestReg) &&
          "Only GPR32 dest copy supported.");
   BuildMI(MBB, I, DL, get(ARC::MOV_rr), DestReg)
       .addReg(SrcReg, getKillRegState(KillSrc));
 }
 
-void ARCInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                       MachineBasicBlock::iterator I,
-                                       Register SrcReg, bool IsKill,
-                                       int FrameIndex,
-                                       const TargetRegisterClass *RC,
-                                       const TargetRegisterInfo *TRI) const {
+void ARCInstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator I, Register SrcReg,
+    bool IsKill, int FrameIndex, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   DebugLoc DL = MBB.findDebugLoc(I);
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FrameIndex),
       MachineMemOperand::MOStore, MFI.getObjectSize(FrameIndex),
       MFI.getObjectAlign(FrameIndex));
BuildMI(MBB, I, DL, get(ARC::ST_rs9))
       .addImm(0)
       .addMemOperand(MMO);
 }
 
 void ARCInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                         MachineBasicBlock::iterator I,
                                         Register DestReg, int FrameIndex,
                                         const TargetRegisterClass *RC,
-                                        const TargetRegisterInfo *TRI) const {
+                                        const TargetRegisterInfo *TRI,
+                                        Register VReg) const {
   DebugLoc DL = MBB.findDebugLoc(I);
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FrameIndex),
       MachineMemOperand::MOLoad, MFI.getObjectSize(FrameIndex),
       MFI.getObjectAlign(FrameIndex));
 

llvm/lib/Target/ARM/ARMBaseInstrInfo.h

void copyFromCPSR(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                     unsigned DestReg, bool KillSrc,
                     const ARMSubtarget &Subtarget) const;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   bool expandPostRAPseudo(MachineInstr &MI) const override;
 
   bool shouldSink(const MachineInstr &MI) const override;
 
   void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                      Register DestReg, unsigned SubIdx,
                      const MachineInstr &Orig,

llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp

ARMBaseInstrInfo::AddDReg(MachineInstrBuilder &MIB, unsigned Reg,
   if (!SubIdx)
     return MIB.addReg(Reg, State);
 
   if (Register::isPhysicalRegister(Reg))
     return MIB.addReg(TRI->getSubReg(Reg, SubIdx), State);
   return MIB.addReg(Reg, State, SubIdx);
 }
 
-void ARMBaseInstrInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void ARMBaseInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+                                           MachineBasicBlock::iterator I,
                                            Register SrcReg, bool isKill, int FI,
                                            const TargetRegisterClass *RC,
-                    const TargetRegisterInfo *TRI) const {
+                                           const TargetRegisterInfo *TRI,
+                                           Register VReg) const {
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   Align Alignment = MFI.getObjectAlign(FI);
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FI), MachineMemOperand::MOStore,
       MFI.getObjectSize(FI), Alignment);
 
if (MI.mayStore() && hasStoreToStackSlot(MI, Accesses) &&
     FrameIndex =
         cast<FixedStackPseudoSourceValue>(Accesses.front()->getPseudoValue())
             ->getFrameIndex();
     return true;
   }
   return false;
 }
 
-void ARMBaseInstrInfo::
-loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void ARMBaseInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                            MachineBasicBlock::iterator I,
                                             Register DestReg, int FI,
                                             const TargetRegisterClass *RC,
-                     const TargetRegisterInfo *TRI) const {
+                                            const TargetRegisterInfo *TRI,
+                                            Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end()) DL = I->getDebugLoc();
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   const Align Alignment = MFI.getObjectAlign(FI);
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FI), MachineMemOperand::MOLoad,
       MFI.getObjectSize(FI), Alignment);

llvm/lib/Target/ARM/Thumb1InstrInfo.h

public:
   /// always be able to get register info as well (through this method).
   ///
   const ThumbRegisterInfo &getRegisterInfo() const override { return RI; }
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   bool canCopyGluedNodeDuringSchedule(SDNode *N) const override;
 private:
   void expandLoadStackGuard(MachineBasicBlock::iterator MI) const override;
 };
 }
 
 #endif

llvm/lib/Target/ARM/Thumb1InstrInfo.cpp

BuildMI(MBB, I, DL, get(ARM::tPUSH))
         .add(predOps(ARMCC::AL))
         .addReg(SrcReg, getKillRegState(KillSrc));
     BuildMI(MBB, I, DL, get(ARM::tPOP))
         .add(predOps(ARMCC::AL))
         .addReg(DestReg, getDefRegState(true));
   }
 }
 
-void Thumb1InstrInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void Thumb1InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+                                          MachineBasicBlock::iterator I,
                                           Register SrcReg, bool isKill, int FI,
                                           const TargetRegisterClass *RC,
-                    const TargetRegisterInfo *TRI) const {
+                                          const TargetRegisterInfo *TRI,
+                                          Register VReg) const {
   assert((RC == &ARM::tGPRRegClass ||
           (Register::isPhysicalRegister(SrcReg) && isARMLowRegister(SrcReg))) &&
          "Unknown regclass!");
 
   if (RC == &ARM::tGPRRegClass ||
       (Register::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(MF, FI), MachineMemOperand::MOStore,
         MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
     BuildMI(MBB, I, DL, get(ARM::tSTRspi))
         .addReg(SrcReg, getKillRegState(isKill))
         .addFrameIndex(FI)
         .addImm(0)
         .addMemOperand(MMO)
         .add(predOps(ARMCC::AL));
   }
 }
 
-void Thumb1InstrInfo::
-loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void Thumb1InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                           MachineBasicBlock::iterator I,
                                            Register DestReg, int FI,
                                            const TargetRegisterClass *RC,
-                     const TargetRegisterInfo *TRI) const {
+                                           const TargetRegisterInfo *TRI,
+                                           Register VReg) const {
   assert(
       (RC->hasSuperClassEq(&ARM::tGPRRegClass) ||
        (Register::isPhysicalRegister(DestReg) && isARMLowRegister(DestReg))) &&
       "Unknown regclass!");
 
   if (RC->hasSuperClassEq(&ARM::tGPRRegClass) ||
       (Register::isPhysicalRegister(DestReg) && isARMLowRegister(DestReg))) {
     DebugLoc DL;

llvm/lib/Target/ARM/Thumb2InstrInfo.h

public:
   bool isLegalToSplitMBBAt(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
   /// such, whenever a client has an instance of instruction info, it should
   /// always be able to get register info as well (through this method).
   ///
   const ThumbRegisterInfo &getRegisterInfo() const override { return RI; }
 
   MachineInstr *optimizeSelect(MachineInstr &MI,

llvm/lib/Target/ARM/Thumb2InstrInfo.cpp

void Thumb2InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
   if (!ARM::GPRRegClass.contains(DestReg, SrcReg))
     return ARMBaseInstrInfo::copyPhysReg(MBB, I, DL, DestReg, SrcReg, KillSrc);
 
   BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg)
       .addReg(SrcReg, getKillRegState(KillSrc))
       .add(predOps(ARMCC::AL));
 }
 
-void Thumb2InstrInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void Thumb2InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+                                          MachineBasicBlock::iterator I,
                                           Register SrcReg, bool isKill, int FI,
                                           const TargetRegisterClass *RC,
-                    const TargetRegisterInfo *TRI) const {
+                                          const TargetRegisterInfo *TRI,
+                                          Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end()) DL = I->getDebugLoc();
 
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FI), MachineMemOperand::MOStore,
       MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
if (ARM::GPRPairRegClass.hasSubClassEq(RC)) {
 
     MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::t2STRDi8));
     AddDReg(MIB, SrcReg, ARM::gsub_0, getKillRegState(isKill), TRI);
     AddDReg(MIB, SrcReg, ARM::gsub_1, 0, TRI);
     MIB.addFrameIndex(FI).addImm(0).addMemOperand(MMO).add(predOps(ARMCC::AL));
     return;
   }
 
-  ARMBaseInstrInfo::storeRegToStackSlot(MBB, I, SrcReg, isKill, FI, RC, TRI);
+  ARMBaseInstrInfo::storeRegToStackSlot(MBB, I, SrcReg, isKill, FI, RC, TRI,
+                                        Register());
 }
 
-void Thumb2InstrInfo::
-loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void Thumb2InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                           MachineBasicBlock::iterator I,
                                            Register DestReg, int FI,
                                            const TargetRegisterClass *RC,
-                     const TargetRegisterInfo *TRI) const {
+                                           const TargetRegisterInfo *TRI,
+                                           Register VReg) const {
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FI), MachineMemOperand::MOLoad,
       MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
   DebugLoc DL;
   if (I != MBB.end()) DL = I->getDebugLoc();
 
if (ARM::GPRPairRegClass.hasSubClassEq(RC)) {
     AddDReg(MIB, DestReg, ARM::gsub_1, RegState::DefineNoRead, TRI);
     MIB.addFrameIndex(FI).addImm(0).addMemOperand(MMO).add(predOps(ARMCC::AL));
 
     if (Register::isPhysicalRegister(DestReg))
       MIB.addReg(DestReg, RegState::ImplicitDefine);
     return;
   }
 
-  ARMBaseInstrInfo::loadRegFromStackSlot(MBB, I, DestReg, FI, RC, TRI);
+  ARMBaseInstrInfo::loadRegFromStackSlot(MBB, I, DestReg, FI, RC, TRI,
+                                         Register());
 }
 
 void Thumb2InstrInfo::expandLoadStackGuard(
     MachineBasicBlock::iterator MI) const {
   MachineFunction &MF = *MI->getParent()->getParent();
   Module &M = *MF.getFunction().getParent();
 
   if (M.getStackProtectorGuard() == "tls") {

llvm/lib/Target/AVR/AVRInstrInfo.h

public:
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI, Register SrcReg,
                            bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
   unsigned isLoadFromStackSlot(const MachineInstr &MI,
                                int &FrameIndex) const override;
   unsigned isStoreToStackSlot(const MachineInstr &MI,
                               int &FrameIndex) const override;
 
   // Branch analysis.
   bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
                      MachineBasicBlock *&FBB,

llvm/lib/Target/AVR/AVRInstrInfo.cpp

unsigned AVRInstrInfo::isStoreToStackSlot(const MachineInstr &MI,
   }
   default:
     break;
   }
 
   return 0;
 }
 
-void AVRInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                       MachineBasicBlock::iterator MI,
-                                       Register SrcReg, bool isKill,
-                                       int FrameIndex,
-                                       const TargetRegisterClass *RC,
-                                       const TargetRegisterInfo *TRI) const {
+void AVRInstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register SrcReg,
+    bool isKill, int FrameIndex, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   MachineFunction &MF = *MBB.getParent();
   AVRMachineFunctionInfo *AFI = MF.getInfo<AVRMachineFunctionInfo>();
 
   AFI->setHasSpills(true);
 
   const MachineFrameInfo &MFI = MF.getFrameInfo();
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
BuildMI(MBB, MI, DebugLoc(), get(Opcode))
       .addReg(SrcReg, getKillRegState(isKill))
       .addMemOperand(MMO);
 }
 
 void AVRInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                         MachineBasicBlock::iterator MI,
                                         Register DestReg, int FrameIndex,
                                         const TargetRegisterClass *RC,
-                                        const TargetRegisterInfo *TRI) const {
+                                        const TargetRegisterInfo *TRI,
+                                        Register VReg) const {
   MachineFunction &MF = *MBB.getParent();
   const MachineFrameInfo &MFI = MF.getFrameInfo();
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FrameIndex),
       MachineMemOperand::MOLoad, MFI.getObjectSize(FrameIndex),
       MFI.getObjectAlign(FrameIndex));
 

llvm/lib/Target/BPF/BPFInstrInfo.h

void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    bool KillSrc) const override;
 
   bool expandPostRAPseudo(MachineInstr &MI) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI, Register SrcReg,
                            bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
   bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
                      MachineBasicBlock *&FBB,
                      SmallVectorImpl<MachineOperand> &Cond,
                      bool AllowModify) const override;
 
   unsigned removeBranch(MachineBasicBlock &MBB,
                         int *BytesRemoved = nullptr) const override;
   unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,

llvm/lib/Target/BPF/BPFInstrInfo.cpp

bool BPFInstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
 
   return false;
 }
 
 void BPFInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
                                        MachineBasicBlock::iterator I,
                                        Register SrcReg, bool IsKill, int FI,
                                        const TargetRegisterClass *RC,
-                                       const TargetRegisterInfo *TRI) const {
+                                       const TargetRegisterInfo *TRI,
+                                       Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   if (RC == &BPF::GPRRegClass)
     BuildMI(MBB, I, DL, get(BPF::STD))
         .addReg(SrcReg, getKillRegState(IsKill))
         .addFrameIndex(FI)
         .addImm(0);
   else if (RC == &BPF::GPR32RegClass)
     BuildMI(MBB, I, DL, get(BPF::STW32))
         .addReg(SrcReg, getKillRegState(IsKill))
         .addFrameIndex(FI)
         .addImm(0);
   else
     llvm_unreachable("Can't store this register to stack slot");
 }
 
 void BPFInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                         MachineBasicBlock::iterator I,
                                         Register DestReg, int FI,
                                         const TargetRegisterClass *RC,
-                                        const TargetRegisterInfo *TRI) const {
+                                        const TargetRegisterInfo *TRI,
+                                        Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   if (RC == &BPF::GPRRegClass)
     BuildMI(MBB, I, DL, get(BPF::LDD), DestReg).addFrameIndex(FI).addImm(0);
   else if (RC == &BPF::GPR32RegClass)
     BuildMI(MBB, I, DL, get(BPF::LDW32), DestReg).addFrameIndex(FI).addImm(0);

llvm/lib/Target/CSKY/CSKYFrameLowering.cpp

bool CSKYFrameLowering::spillCalleeSavedRegisters(
   DebugLoc DL;
   if (MI != MBB.end() && !MI->isDebugInstr())
     DL = MI->getDebugLoc();
 
   for (auto &CS : CSI) {
     // Insert the spill to the stack frame.
     Register Reg = CS.getReg();
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-    TII.storeRegToStackSlot(MBB, MI, Reg, true, CS.getFrameIdx(), RC, TRI);
+    TII.storeRegToStackSlot(MBB, MI, Reg, true, CS.getFrameIdx(), RC, TRI,
+                            Register());
   }
 
   return true;
 }
 
 bool CSKYFrameLowering::restoreCalleeSavedRegisters(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
     MutableArrayRef<CalleeSavedInfo> CSI, const TargetRegisterInfo *TRI) const {
   if (CSI.empty())
     return true;
 
   MachineFunction *MF = MBB.getParent();
   const TargetInstrInfo &TII = *MF->getSubtarget().getInstrInfo();
   DebugLoc DL;
   if (MI != MBB.end() && !MI->isDebugInstr())
     DL = MI->getDebugLoc();
 
   for (auto &CS : reverse(CSI)) {
     Register Reg = CS.getReg();
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-    TII.loadRegFromStackSlot(MBB, MI, Reg, CS.getFrameIdx(), RC, TRI);
+    TII.loadRegFromStackSlot(MBB, MI, Reg, CS.getFrameIdx(), RC, TRI,
+                             Register());
     assert(MI != MBB.begin() && "loadRegFromStackSlot didn't insert any code!");
   }
 
   return true;
 }
 
 // Eliminate ADJCALLSTACKDOWN, ADJCALLSTACKUP pseudo instructions.
 MachineBasicBlock::iterator CSKYFrameLowering::eliminateCallFramePseudoInstr(

llvm/lib/Target/CSKY/CSKYInstrInfo.h

unsigned isLoadFromStackSlot(const MachineInstr &MI,
                                int &FrameIndex) const override;
   unsigned isStoreToStackSlot(const MachineInstr &MI,
                               int &FrameIndex) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI, Register SrcReg,
                            bool IsKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
                         MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
                         const DebugLoc &DL,

llvm/lib/Target/CSKY/CSKYInstrInfo.cpp

unsigned CSKYInstrInfo::isStoreToStackSlot(const MachineInstr &MI,
 
   return 0;
 }
 
 void CSKYInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
                                         MachineBasicBlock::iterator I,
                                         Register SrcReg, bool IsKill, int FI,
                                         const TargetRegisterClass *RC,
-                                        const TargetRegisterInfo *TRI) const {
+                                        const TargetRegisterInfo *TRI,
+                                        Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   MachineFunction &MF = *MBB.getParent();
   CSKYMachineFunctionInfo *CFI = MF.getInfo<CSKYMachineFunctionInfo>();
   MachineFrameInfo &MFI = MF.getFrameInfo();
 
BuildMI(MBB, I, DL, get(Opcode))
       .addImm(0)
       .addMemOperand(MMO);
 }
 
 void CSKYInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                          MachineBasicBlock::iterator I,
                                          Register DestReg, int FI,
                                          const TargetRegisterClass *RC,
-                                         const TargetRegisterInfo *TRI) const {
+                                         const TargetRegisterInfo *TRI,
+                                         Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   MachineFunction &MF = *MBB.getParent();
   CSKYMachineFunctionInfo *CFI = MF.getInfo<CSKYMachineFunctionInfo>();
   MachineFrameInfo &MFI = MF.getFrameInfo();
 

llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp

bool HexagonFrameLowering::insertCSRSpillsInBlock(MachineBasicBlock &MBB,
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     // Add live in registers. We treat eh_return callee saved register r0 - r3
     // specially. They are not really callee saved registers as they are not
     // supposed to be killed.
     bool IsKill = !HRI.isEHReturnCalleeSaveReg(Reg);
     int FI = I.getFrameIdx();
     const TargetRegisterClass *RC = HRI.getMinimalPhysRegClass(Reg);
-    HII.storeRegToStackSlot(MBB, MI, Reg, IsKill, FI, RC, &HRI);
+    HII.storeRegToStackSlot(MBB, MI, Reg, IsKill, FI, RC, &HRI, Register());
     if (IsKill)
       MBB.addLiveIn(Reg);
   }
   return true;
 }
 
 bool HexagonFrameLowering::insertCSRRestoresInBlock(MachineBasicBlock &MBB,
       const CSIVect &CSI, const HexagonRegisterInfo &HRI) const {
if (useRestoreFunction(MF, CSI)) {
     addCalleeSaveRegistersAsImpOperand(DeallocCall, CSI, true, false);
     return true;
   }
 
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     const TargetRegisterClass *RC = HRI.getMinimalPhysRegClass(Reg);
     int FI = I.getFrameIdx();
-    HII.loadRegFromStackSlot(MBB, MI, Reg, FI, RC, &HRI);
+    HII.loadRegFromStackSlot(MBB, MI, Reg, FI, RC, &HRI, Register());
   }
 
   return true;
 }
 
 MachineBasicBlock::iterator HexagonFrameLowering::eliminateCallFramePseudoInstr(
     MachineFunction &MF, MachineBasicBlock &MBB,
     MachineBasicBlock::iterator I) const {
bool HexagonFrameLowering::expandStoreVecPred(MachineBasicBlock &B,
   BuildMI(B, It, DL, HII.get(Hexagon::A2_tfrsi), TmpR0)
     .addImm(0x01010101);
 
   BuildMI(B, It, DL, HII.get(Hexagon::V6_vandqrt), TmpR1)
     .addReg(SrcR, getKillRegState(IsKill))
     .addReg(TmpR0, RegState::Kill);
 
   auto *HRI = B.getParent()->getSubtarget<HexagonSubtarget>().getRegisterInfo();
-  HII.storeRegToStackSlot(B, It, TmpR1, true, FI, RC, HRI);
+  HII.storeRegToStackSlot(B, It, TmpR1, true, FI, RC, HRI, Register());
   expandStoreVec(B, std::prev(It), MRI, HII, NewRegs);
 
   NewRegs.push_back(TmpR0);
   NewRegs.push_back(TmpR1);
   B.erase(It);
   return true;
 }
 
bool HexagonFrameLowering::expandLoadVecPred(MachineBasicBlock &B,
   // DstR = V6_vandvrt TmpR1, TmpR0
   Register TmpR0 = MRI.createVirtualRegister(&Hexagon::IntRegsRegClass);
   Register TmpR1 = MRI.createVirtualRegister(RC);
 
   BuildMI(B, It, DL, HII.get(Hexagon::A2_tfrsi), TmpR0)
     .addImm(0x01010101);
   MachineFunction &MF = *B.getParent();
   auto *HRI = MF.getSubtarget<HexagonSubtarget>().getRegisterInfo();
-  HII.loadRegFromStackSlot(B, It, TmpR1, FI, RC, HRI);
+  HII.loadRegFromStackSlot(B, It, TmpR1, FI, RC, HRI, Register());
   expandLoadVec(B, std::prev(It), MRI, HII, NewRegs);
 
   BuildMI(B, It, DL, HII.get(Hexagon::V6_vandvrt), DstR)
     .addReg(TmpR1, RegState::Kill)
     .addReg(TmpR0, RegState::Kill);
 
   NewRegs.push_back(TmpR0);
   NewRegs.push_back(TmpR1);

llvm/lib/Target/Hexagon/HexagonInstrInfo.h

void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   /// Store the specified register of the given register class to the specified
   /// stack frame index. The store instruction is to be added to the given
   /// machine basic block before the specified machine instruction. If isKill
   /// is true, the register operand is the last use and must be marked kill.
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   /// Load the specified register of the given register class from the specified
   /// stack frame index. The load instruction is to be added to the given
   /// machine basic block before the specified machine instruction.
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   /// This function is called for all pseudo instructions
   /// that remain after register allocation. Many pseudo instructions are
   /// created to help register allocation. This is the place to convert them
   /// into real instructions. The target can edit MI in place, or it can insert
   /// new instructions and erase MI. The function should return true if
   /// anything was changed.
   bool expandPostRAPseudo(MachineInstr &MI) const override;

llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp

#ifndef NDEBUG
   // Show the invalid registers to ease debugging.
   dbgs() << "Invalid registers for copy in " << printMBBReference(MBB) << ": "
          << printReg(DestReg, &HRI) << " = " << printReg(SrcReg, &HRI) << '\n';
 #endif
   llvm_unreachable("Unimplemented");
 }
 
 void HexagonInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-      MachineBasicBlock::iterator I, Register SrcReg, bool isKill, int FI,
-      const TargetRegisterClass *RC, const TargetRegisterInfo *TRI) const {
+                                           MachineBasicBlock::iterator I,
+                                           Register SrcReg, bool isKill, int FI,
+                                           const TargetRegisterClass *RC,
+                                           const TargetRegisterInfo *TRI,
+                                           Register VReg) const {
   DebugLoc DL = MBB.findDebugLoc(I);
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
   unsigned KillFlag = getKillRegState(isKill);
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FI), MachineMemOperand::MOStore,
       MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
if (Hexagon::IntRegsRegClass.hasSubClassEq(RC)) {
     BuildMI(MBB, I, DL, get(Hexagon::PS_vstorerw_ai))
       .addFrameIndex(FI).addImm(0)
       .addReg(SrcReg, KillFlag).addMemOperand(MMO);
   } else {
     llvm_unreachable("Unimplemented");
   }
 }
 
-void HexagonInstrInfo::loadRegFromStackSlot(
-    MachineBasicBlock &MBB, MachineBasicBlock::iterator I, Register DestReg,
-    int FI, const TargetRegisterClass *RC,
-    const TargetRegisterInfo *TRI) const {
+void HexagonInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                            MachineBasicBlock::iterator I,
+                                            Register DestReg, int FI,
+                                            const TargetRegisterClass *RC,
+                                            const TargetRegisterInfo *TRI,
+                                            Register VReg) const {
   DebugLoc DL = MBB.findDebugLoc(I);
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FI), MachineMemOperand::MOLoad,
       MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
 

llvm/lib/Target/Lanai/LanaiInstrInfo.h

public:
 
   unsigned isStoreToStackSlot(const MachineInstr &MI,
                               int &FrameIndex) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator Position,
                    const DebugLoc &DL, MCRegister DestinationRegister,
                    MCRegister SourceRegister, bool KillSource) const override;
 
-  void
-  storeRegToStackSlot(MachineBasicBlock &MBB,
+  void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator Position,
                            Register SourceRegister, bool IsKill, int FrameIndex,
                            const TargetRegisterClass *RegisterClass,
-                      const TargetRegisterInfo *RegisterInfo) const override;
+                           const TargetRegisterInfo *RegisterInfo,
+                           Register VReg) const override;
 
-  void
-  loadRegFromStackSlot(MachineBasicBlock &MBB,
+  void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator Position,
                             Register DestinationRegister, int FrameIndex,
                             const TargetRegisterClass *RegisterClass,
-                       const TargetRegisterInfo *RegisterInfo) const override;
+                            const TargetRegisterInfo *RegisterInfo,
+                            Register VReg) const override;
 
   bool expandPostRAPseudo(MachineInstr &MI) const override;
 
   bool getMemOperandsWithOffsetWidth(
       const MachineInstr &LdSt,
       SmallVectorImpl<const MachineOperand *> &BaseOps, int64_t &Offset,
       bool &OffsetIsScalable, unsigned &Width,
       const TargetRegisterInfo *TRI) const override;

llvm/lib/Target/Lanai/LanaiInstrInfo.cpp

BuildMI(MBB, Position, DL, get(Lanai::OR_I_LO), DestinationRegister)
       .addReg(SourceRegister, getKillRegState(KillSource))
       .addImm(0);
 }
 
 void LanaiInstrInfo::storeRegToStackSlot(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator Position,
     Register SourceRegister, bool IsKill, int FrameIndex,
     const TargetRegisterClass *RegisterClass,
-    const TargetRegisterInfo * /*RegisterInfo*/) const {
+    const TargetRegisterInfo * /*RegisterInfo*/, Register /*VReg*/) const {
   DebugLoc DL;
   if (Position != MBB.end()) {
     DL = Position->getDebugLoc();
   }
 
   if (!Lanai::GPRRegClass.hasSubClassEq(RegisterClass)) {
     llvm_unreachable("Can't store this register to stack slot");
   }
   BuildMI(MBB, Position, DL, get(Lanai::SW_RI))
       .addReg(SourceRegister, getKillRegState(IsKill))
       .addFrameIndex(FrameIndex)
       .addImm(0)
       .addImm(LPAC::ADD);
 }
 
 void LanaiInstrInfo::loadRegFromStackSlot(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator Position,
     Register DestinationRegister, int FrameIndex,
     const TargetRegisterClass *RegisterClass,
-    const TargetRegisterInfo * /*RegisterInfo*/) const {
+    const TargetRegisterInfo * /*RegisterInfo*/, Register /*VReg*/) const {
   DebugLoc DL;
   if (Position != MBB.end()) {
     DL = Position->getDebugLoc();
   }
 
   if (!Lanai::GPRRegClass.hasSubClassEq(RegisterClass)) {
     llvm_unreachable("Can't load this register from stack slot");
   }

llvm/lib/Target/LoongArch/LoongArchFrameLowering.cpp

bool LoongArchFrameLowering::spillCalleeSavedRegisters(
   // Insert the spill to the stack frame.
   for (auto &CS : CSI) {
     Register Reg = CS.getReg();
     // If the register is RA and the return address is taken by method
     // LoongArchTargetLowering::lowerRETURNADDR, don't set kill flag.
     bool IsKill =
         !(Reg == LoongArch::R1 && MF->getFrameInfo().isReturnAddressTaken());
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-    TII.storeRegToStackSlot(MBB, MI, Reg, IsKill, CS.getFrameIdx(), RC, TRI);
+    TII.storeRegToStackSlot(MBB, MI, Reg, IsKill, CS.getFrameIdx(), RC, TRI,
+                            Register());
   }
 
   return true;
 }
 
 StackOffset LoongArchFrameLowering::getFrameIndexReference(
     const MachineFunction &MF, int FI, Register &FrameReg) const {
   const MachineFrameInfo &MFI = MF.getFrameInfo();

llvm/lib/Target/LoongArch/LoongArchInstrInfo.h

public:
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                    const DebugLoc &DL, MCRegister DstReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI, Register SrcReg,
                            bool IsKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI, Register DstReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   // Materializes the given integer Val into DstReg.
   void movImm(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
               const DebugLoc &DL, Register DstReg, uint64_t Val,
               MachineInstr::MIFlag Flag = MachineInstr::NoFlags) const;
 
   unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
 

llvm/lib/Target/LoongArch/LoongArchInstrInfo.cpp

void LoongArchInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
 
   BuildMI(MBB, MBBI, DL, get(Opc), DstReg)
       .addReg(SrcReg, getKillRegState(KillSrc));
 }
 
 void LoongArchInstrInfo::storeRegToStackSlot(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator I, Register SrcReg,
     bool IsKill, int FI, const TargetRegisterClass *RC,
-    const TargetRegisterInfo *TRI) const {
+    const TargetRegisterInfo *TRI, Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
   MachineFunction *MF = MBB.getParent();
   MachineFrameInfo &MFI = MF->getFrameInfo();
 
   unsigned Opcode;
   if (LoongArch::GPRRegClass.hasSubClassEq(RC))
void LoongArchInstrInfo::storeRegToStackSlot(
 
   BuildMI(MBB, I, DL, get(Opcode))
       .addReg(SrcReg, getKillRegState(IsKill))
       .addFrameIndex(FI)
       .addImm(0)
       .addMemOperand(MMO);
 }
 
-void LoongArchInstrInfo::loadRegFromStackSlot(
-    MachineBasicBlock &MBB, MachineBasicBlock::iterator I, Register DstReg,
-    int FI, const TargetRegisterClass *RC,
-    const TargetRegisterInfo *TRI) const {
+void LoongArchInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                              MachineBasicBlock::iterator I,
+                                              Register DstReg, int FI,
+                                              const TargetRegisterClass *RC,
+                                              const TargetRegisterInfo *TRI,
+                                              Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
   MachineFunction *MF = MBB.getParent();
   MachineFrameInfo &MFI = MF->getFrameInfo();
 
   unsigned Opcode;
   if (LoongArch::GPRRegClass.hasSubClassEq(RC))
void LoongArchInstrInfo::insertIndirectBranch(MachineBasicBlock &MBB,
   else {
     // When there is no scavenged register, it needs to specify a register.
     // Specify t8 register because it won't be used too often.
     Scav = LoongArch::R20;
     int FrameIndex = LAFI->getBranchRelaxationSpillFrameIndex();
     if (FrameIndex == -1)
       report_fatal_error("The function size is incorrectly estimated.");
     storeRegToStackSlot(MBB, PCALAU12I, Scav, /*IsKill=*/true, FrameIndex,
-                        &LoongArch::GPRRegClass, TRI);
+                        &LoongArch::GPRRegClass, TRI, Register());
     TRI->eliminateFrameIndex(std::prev(PCALAU12I.getIterator()),
                              /*SpAdj=*/0, /*FIOperandNum=*/1);
     PCALAU12I.getOperand(1).setMBB(&RestoreBB);
     ADDI.getOperand(2).setMBB(&RestoreBB);
     loadRegFromStackSlot(RestoreBB, RestoreBB.end(), Scav, FrameIndex,
-                         &LoongArch::GPRRegClass, TRI);
+                         &LoongArch::GPRRegClass, TRI, Register());
     TRI->eliminateFrameIndex(RestoreBB.back(),
                              /*SpAdj=*/0, /*FIOperandNum=*/1);
   }
   MRI.replaceRegWith(ScratchReg, Scav);
   MRI.clearVirtRegs();
 }
 
 static unsigned getOppositeBranchOpc(unsigned Opc) {

llvm/lib/Target/M68k/M68kFrameLowering.h

assignCalleeSavedSpillSlots(MachineFunction &MF,
                               std::vector<CalleeSavedInfo> &CSI) const override;
 
   /// Issues instruction(s) to spill all callee saved registers and returns
   /// true if it isn't possible / profitable to do so by issuing a series of
   /// store instructions via storeRegToStackSlot(). Returns false otherwise.
   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator MI,
                                  ArrayRef<CalleeSavedInfo> CSI,
-                                 const TargetRegisterInfo *TRI) const override;
+                                 const TargetRegisterInfo *TRI,
+                                 Register VReg) const override;
 
   /// Issues instruction(s) to restore all callee saved registers and returns
   /// true if it isn't possible / profitable to do so by issuing a series of
   /// load instructions via loadRegToStackSlot().  Returns false otherwise.
   bool
   restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator MI,
                               MutableArrayRef<CalleeSavedInfo> CSI,

llvm/lib/Target/M68k/M68kInstrInfo.h

public:
   bool getStackSlotRange(const TargetRegisterClass *RC, unsigned SubIdx,
                          unsigned &Size, unsigned &Offset,
                          const MachineFunction &MF) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI, Register SrcReg,
                            bool IsKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   bool expandPostRAPseudo(MachineInstr &MI) const override;
 
   bool isPCRelRegisterOperandLegal(const MachineOperand &MO) const override;
 
   /// Add appropriate SExt nodes
   void AddSExt(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                DebugLoc DL, unsigned Reg, MVT From, MVT To) const;

llvm/lib/Target/M68k/M68kInstrInfo.cpp

bool M68kInstrInfo::getStackSlotRange(const TargetRegisterClass *RC,
                                       unsigned &Offset,
                                       const MachineFunction &MF) const {
   // The slot size must be the maximum size so we can easily use MOVEM.L
   Size = 4;
   Offset = 0;
   return true;
 }
 
-void M68kInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                        MachineBasicBlock::iterator MI,
-                                        Register SrcReg, bool IsKill,
-                                        int FrameIndex,
-                                        const TargetRegisterClass *RC,
-                                        const TargetRegisterInfo *TRI) const {
+void M68kInstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register SrcReg,
+    bool IsKill, int FrameIndex, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   const MachineFrameInfo &MFI = MBB.getParent()->getFrameInfo();
   assert(MFI.getObjectSize(FrameIndex) >= TRI->getSpillSize(*RC) &&
          "Stack slot is too small to store");
 
   unsigned Opc = getStoreRegOpcode(SrcReg, RC, TRI, Subtarget);
   DebugLoc DL = MBB.findDebugLoc(MI);
   // (0,FrameIndex) <- $reg
   M68k::addFrameReference(BuildMI(MBB, MI, DL, get(Opc)), FrameIndex)
       .addReg(SrcReg, getKillRegState(IsKill));
 }
 
 void M68kInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                          MachineBasicBlock::iterator MI,
                                          Register DstReg, int FrameIndex,
                                          const TargetRegisterClass *RC,
-                                         const TargetRegisterInfo *TRI) const {
+                                         const TargetRegisterInfo *TRI,
+                                         Register VReg) const {
   const MachineFrameInfo &MFI = MBB.getParent()->getFrameInfo();
   assert(MFI.getObjectSize(FrameIndex) >= TRI->getSpillSize(*RC) &&
          "Stack slot is too small to load");
 
   unsigned Opc = getLoadRegOpcode(DstReg, RC, TRI, Subtarget);
   DebugLoc DL = MBB.findDebugLoc(MI);
   M68k::addFrameReference(BuildMI(MBB, MI, DL, get(Opc), DstReg), FrameIndex);
 }

llvm/lib/Target/MSP430/MSP430InstrInfo.h

public:
   ///
   const TargetRegisterInfo &getRegisterInfo() const { return RI; }
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MI,
-                           Register SrcReg, bool isKill,
-                           int FrameIndex,
+                           MachineBasicBlock::iterator MI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MI,
-                            Register DestReg, int FrameIdx,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MI, Register DestReg,
+                            int FrameIdx, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
 
   // Branch folding goodness
   bool
   reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
   bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
                      MachineBasicBlock *&FBB,

llvm/lib/Target/MSP430/MSP430InstrInfo.cpp

 
 // Pin the vtable to this file.
 void MSP430InstrInfo::anchor() {}
 
 MSP430InstrInfo::MSP430InstrInfo(MSP430Subtarget &STI)
   : MSP430GenInstrInfo(MSP430::ADJCALLSTACKDOWN, MSP430::ADJCALLSTACKUP),
     RI() {}
 
-void MSP430InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                          MachineBasicBlock::iterator MI,
-                                    Register SrcReg, bool isKill, int FrameIdx,
-                                          const TargetRegisterClass *RC,
-                                          const TargetRegisterInfo *TRI) const {
+void MSP430InstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register SrcReg,
+    bool isKill, int FrameIdx, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   DebugLoc DL;
   if (MI != MBB.end()) DL = MI->getDebugLoc();
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FrameIdx),
       MachineMemOperand::MOStore, MFI.getObjectSize(FrameIdx),
void MSP430InstrInfo::storeRegToStackSlot(
   else
     llvm_unreachable("Cannot store this register to stack slot!");
 }
 
 void MSP430InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                            MachineBasicBlock::iterator MI,
                                            Register DestReg, int FrameIdx,
                                            const TargetRegisterClass *RC,
-                                           const TargetRegisterInfo *TRI) const{
+                                           const TargetRegisterInfo *TRI,
+                                           Register VReg) const {
   DebugLoc DL;
   if (MI != MBB.end()) DL = MI->getDebugLoc();
   MachineFunction &MF = *MBB.getParent();
   MachineFrameInfo &MFI = MF.getFrameInfo();
 
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FrameIdx),
       MachineMemOperand::MOLoad, MFI.getObjectSize(FrameIdx),

llvm/lib/Target/Mips/MipsInstrInfo.h

public:
   virtual bool isBranchWithImm(unsigned Opc) const {
     return false;
   }
 
   /// Return the number of bytes of code the specified instruction may be.
   unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override {
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override {
     storeRegToStack(MBB, MBBI, SrcReg, isKill, FrameIndex, RC, TRI, 0);
   }
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override {
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override {
     loadRegFromStack(MBB, MBBI, DestReg, FrameIndex, RC, TRI, 0);
   }
 
   virtual void storeRegToStack(MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator MI,
                                Register SrcReg, bool isKill, int FrameIndex,
                                const TargetRegisterClass *RC,
                                const TargetRegisterInfo *TRI,

llvm/lib/Target/Mips/MipsSEFrameLowering.cpp

void MipsSEFrameLowering::emitPrologue(MachineFunction &MF,
   }
 
   if (MipsFI->callsEhReturn()) {
     // Insert instructions that spill eh data registers.
     for (int I = 0; I < 4; ++I) {
       if (!MBB.isLiveIn(ABI.GetEhDataReg(I)))
         MBB.addLiveIn(ABI.GetEhDataReg(I));
       TII.storeRegToStackSlot(MBB, MBBI, ABI.GetEhDataReg(I), false,
-                              MipsFI->getEhDataRegFI(I), RC, &RegInfo);
+                              MipsFI->getEhDataRegFI(I), RC, &RegInfo,
+                              Register());
     }
 
     // Emit .cfi_offset directives for eh data registers.
     for (int I = 0; I < 4; ++I) {
       int64_t Offset = MFI.getObjectOffset(MipsFI->getEhDataRegFI(I));
       unsigned Reg = MRI->getDwarfRegNum(ABI.GetEhDataReg(I), true);
       unsigned CFIIndex = MF.addFrameInst(
           MCCFIInstruction::createOffset(nullptr, Reg, Offset));
if (MipsFI->callsEhReturn()) {
     // Find first instruction that restores a callee-saved register.
     MachineBasicBlock::iterator I = MBBI;
     for (unsigned i = 0; i < MFI.getCalleeSavedInfo().size(); ++i)
       --I;
 
     // Insert instructions that restore eh data registers.
     for (int J = 0; J < 4; ++J) {
       TII.loadRegFromStackSlot(MBB, I, ABI.GetEhDataReg(J),
-                               MipsFI->getEhDataRegFI(J), RC, &RegInfo);
+                               MipsFI->getEhDataRegFI(J), RC, &RegInfo,
+                               Register());
     }
   }
 
   if (MF.getFunction().hasFnAttribute("interrupt"))
     emitInterruptEpilogueStub(MF, MBB);
 
   // Get the number of bytes from FrameInfo
   uint64_t StackSize = MFI.getStackSize();
void MipsSEFrameLowering::emitInterruptEpilogueStub(
 
   // Disable Interrupts.
   BuildMI(MBB, MBBI, DL, STI.getInstrInfo()->get(Mips::DI), Mips::ZERO);
   BuildMI(MBB, MBBI, DL, STI.getInstrInfo()->get(Mips::EHB));
 
   // Restore EPC
   STI.getInstrInfo()->loadRegFromStackSlot(MBB, MBBI, Mips::K1,
                                            MipsFI->getISRRegFI(0), PtrRC,
-                                           STI.getRegisterInfo());
+                                           STI.getRegisterInfo(), Register());
   BuildMI(MBB, MBBI, DL, STI.getInstrInfo()->get(Mips::MTC0), Mips::COP014)
       .addReg(Mips::K1)
       .addImm(0);
 
   // Restore Status
   STI.getInstrInfo()->loadRegFromStackSlot(MBB, MBBI, Mips::K1,
                                            MipsFI->getISRRegFI(1), PtrRC,
-                                           STI.getRegisterInfo());
+                                           STI.getRegisterInfo(), Register());
   BuildMI(MBB, MBBI, DL, STI.getInstrInfo()->get(Mips::MTC0), Mips::COP012)
       .addReg(Mips::K1)
       .addImm(0);
 }
 
 StackOffset
 MipsSEFrameLowering::getFrameIndexReference(const MachineFunction &MF, int FI,
                                             Register &FrameReg) const {
if (IsLOHI && Func.hasFnAttribute("interrupt")) {
       }
       BuildMI(MBB, MI, DL, TII.get(Op), Mips::K0)
           .setMIFlag(MachineInstr::FrameSetup);
     }
 
     // Insert the spill to the stack frame.
     bool IsKill = !IsRAAndRetAddrIsTaken;
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-    TII.storeRegToStackSlot(MBB, MI, Reg, IsKill, I.getFrameIdx(), RC, TRI);
+    TII.storeRegToStackSlot(MBB, MI, Reg, IsKill, I.getFrameIdx(), RC, TRI,
+                            Register());
   }
 
   return true;
 }
 
 bool
 MipsSEFrameLowering::hasReservedCallFrame(const MachineFunction &MF) const {
   const MachineFrameInfo &MFI = MF.getFrameInfo();

llvm/lib/Target/NVPTX/NVPTXInstrInfo.h

public:
    *
    * virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
    *                                  int &FrameIndex) const;
    * virtual unsigned isStoreToStackSlot(const MachineInstr *MI,
    *                                 int &FrameIndex) const;
    * virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
    *                              MachineBasicBlock::iterator MBBI,
    *                             unsigned SrcReg, bool isKill, int FrameIndex,
-   *                              const TargetRegisterClass *RC) const;
+   *                              const TargetRegisterClass *RC,
+   *                              Register VReg) const;
    * virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
    *                               MachineBasicBlock::iterator MBBI,
    *                               unsigned DestReg, int FrameIndex,
-   *                               const TargetRegisterClass *RC) const;
+   *                               const TargetRegisterClass *RC,
+   *                               const TargetRegisterInfo *TRI,
+   *                               Register VReg) const;
    */
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   // Branch analysis.
   bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,

llvm/lib/Target/PowerPC/PPCFrameLowering.cpp

if (IsCRField) {
         // before their use because they will become undefined registers.
         // Functions without NoUnwind need to preserve the order of elements in
         // saved vector registers.
         if (Subtarget.needsSwapsForVSXMemOps() &&
             !MF->getFunction().hasFnAttribute(Attribute::NoUnwind))
           TII.storeRegToStackSlotNoUpd(MBB, MI, Reg, !IsLiveIn,
                                        I.getFrameIdx(), RC, TRI);
         else
-          TII.storeRegToStackSlot(MBB, MI, Reg, !IsLiveIn, I.getFrameIdx(),
-                                  RC, TRI);
+          TII.storeRegToStackSlot(MBB, MI, Reg, !IsLiveIn, I.getFrameIdx(), RC,
+                                  TRI, Register());
       }
     }
   }
   return true;
 }
 
 static void restoreCRs(bool is31, bool CR2Spilled, bool CR3Spilled,
                        bool CR4Spilled, MachineBasicBlock &MBB,
if (Reg == PPC::CR2) {
 
         // Functions without NoUnwind need to preserve the order of elements in
         // saved vector registers.
         if (Subtarget.needsSwapsForVSXMemOps() &&
             !MF->getFunction().hasFnAttribute(Attribute::NoUnwind))
           TII.loadRegFromStackSlotNoUpd(MBB, I, Reg, CSI[i].getFrameIdx(), RC,
                                         TRI);
         else
-          TII.loadRegFromStackSlot(MBB, I, Reg, CSI[i].getFrameIdx(), RC, TRI);
+          TII.loadRegFromStackSlot(MBB, I, Reg, CSI[i].getFrameIdx(), RC, TRI,
+                                   Register());
 
         assert(I != MBB.begin() &&
                "loadRegFromStackSlot didn't insert any code!");
       }
     }
 
     // Insert in reverse order.
     if (AtStart)

llvm/lib/Target/PowerPC/PPCInstrInfo.h

void insertSelect(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                     ArrayRef<MachineOperand> Cond, Register TrueReg,
                     Register FalseReg) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   // Emits a register spill without updating the register class for vector
   // registers. This ensures that when we spill a vector register the
   // element order in the register is the same as it was in memory.
   void storeRegToStackSlotNoUpd(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator MBBI,
                                 unsigned SrcReg, bool isKill, int FrameIndex,
                                 const TargetRegisterClass *RC,
                                 const TargetRegisterInfo *TRI) const;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   // Emits a register reload without updating the register class for vector
   // registers. This ensures that when we reload a vector register the
   // element order in the register is the same as it was in memory.
   void loadRegFromStackSlotNoUpd(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator MBBI,
                                  unsigned DestReg, int FrameIndex,
                                  const TargetRegisterClass *RC,

llvm/lib/Target/PowerPC/PPCInstrInfo.cpp

void PPCInstrInfo::storeRegToStackSlotNoUpd(
   const MachineFrameInfo &MFI = MF.getFrameInfo();
   MachineMemOperand *MMO = MF.getMachineMemOperand(
       MachinePointerInfo::getFixedStack(MF, FrameIdx),
       MachineMemOperand::MOStore, MFI.getObjectSize(FrameIdx),
       MFI.getObjectAlign(FrameIdx));
   NewMIs.back()->addMemOperand(MF, MMO);
 }
 
-void PPCInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                       MachineBasicBlock::iterator MI,
-                                       Register SrcReg, bool isKill,
-                                       int FrameIdx,
-                                       const TargetRegisterClass *RC,
-                                       const TargetRegisterInfo *TRI) const {
+void PPCInstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register SrcReg,
+    bool isKill, int FrameIdx, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   // We need to avoid a situation in which the value from a VRRC register is
   // spilled using an Altivec instruction and reloaded into a VSRC register
   // using a VSX instruction. The issue with this is that the VSX
   // load/store instructions swap the doublewords in the vector and the Altivec
   // ones don't. The register classes on the spill/reload may be different if
   // the register is defined using an Altivec instruction and is then used by a
   // VSX instruction.
   RC = updatedRC(RC);
MachineMemOperand *MMO = MF.getMachineMemOperand(
       MFI.getObjectAlign(FrameIdx));
   NewMIs.back()->addMemOperand(MF, MMO);
 }
 
 void PPCInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                         MachineBasicBlock::iterator MI,
                                         Register DestReg, int FrameIdx,
                                         const TargetRegisterClass *RC,
-                                        const TargetRegisterInfo *TRI) const {
+                                        const TargetRegisterInfo *TRI,
+                                        Register VReg) const {
   // We need to avoid a situation in which the value from a VRRC register is
   // spilled using an Altivec instruction and reloaded into a VSRC register
   // using a VSX instruction. The issue with this is that the VSX
   // load/store instructions swap the doublewords in the vector and the Altivec
   // ones don't. The register classes on the spill/reload may be different if
   // the register is defined using an Altivec instruction and is then used by a
   // VSX instruction.
   RC = updatedRC(RC);

llvm/lib/Target/RISCV/RISCVFrameLowering.cpp

bool RISCVFrameLowering::spillCalleeSavedRegisters(
 
   // Manually spill values not spilled by libcall.
   const auto &NonLibcallCSI = getNonLibcallCSI(*MF, CSI);
   for (auto &CS : NonLibcallCSI) {
     // Insert the spill to the stack frame.
     Register Reg = CS.getReg();
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
     TII.storeRegToStackSlot(MBB, MI, Reg, !MBB.isLiveIn(Reg), CS.getFrameIdx(),
-                            RC, TRI);
+                            RC, TRI, Register());
   }
 
   return true;
 }
 
 bool RISCVFrameLowering::restoreCalleeSavedRegisters(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
     MutableArrayRef<CalleeSavedInfo> CSI, const TargetRegisterInfo *TRI) const {
bool RISCVFrameLowering::restoreCalleeSavedRegisters(
   // order in the epilogue. In addition, the return address will be restored
   // first in the epilogue. It increases the opportunity to avoid the
   // load-to-use data hazard between loading RA and return by RA.
   // loadRegFromStackSlot can insert multiple instructions.
   const auto &NonLibcallCSI = getNonLibcallCSI(*MF, CSI);
   for (auto &CS : NonLibcallCSI) {
     Register Reg = CS.getReg();
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-    TII.loadRegFromStackSlot(MBB, MI, Reg, CS.getFrameIdx(), RC, TRI);
+    TII.loadRegFromStackSlot(MBB, MI, Reg, CS.getFrameIdx(), RC, TRI,
+                             Register());
     assert(MI != MBB.begin() && "loadRegFromStackSlot didn't insert any code!");
   }
 
   const char *RestoreLibCall = getRestoreLibCallName(*MF, CSI);
   if (RestoreLibCall) {
     // Add restore libcall via tail call.
     MachineBasicBlock::iterator NewMI =
         BuildMI(MBB, MI, DL, TII.get(RISCV::PseudoTAIL))

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

static MachineBasicBlock *emitSplitF64Pseudo(MachineInstr &MI,
   const TargetRegisterInfo *RI = MF.getSubtarget().getRegisterInfo();
   Register LoReg = MI.getOperand(0).getReg();
   Register HiReg = MI.getOperand(1).getReg();
   Register SrcReg = MI.getOperand(2).getReg();
   const TargetRegisterClass *SrcRC = &RISCV::FPR64RegClass;
   int FI = MF.getInfo<RISCVMachineFunctionInfo>()->getMoveF64FrameIndex(MF);
 
   TII.storeRegToStackSlot(*BB, MI, SrcReg, MI.getOperand(2).isKill(), FI, SrcRC,
-                          RI);
+                          RI, Register());
   MachinePointerInfo MPI = MachinePointerInfo::getFixedStack(MF, FI);
   MachineMemOperand *MMOLo =
       MF.getMachineMemOperand(MPI, MachineMemOperand::MOLoad, 4, Align(8));
   MachineMemOperand *MMOHi = MF.getMachineMemOperand(
       MPI.getWithOffset(4), MachineMemOperand::MOLoad, 4, Align(8));
   BuildMI(*BB, MI, DL, TII.get(RISCV::LW), LoReg)
       .addFrameIndex(FI)
       .addImm(0)
BuildMI(*BB, MI, DL, TII.get(RISCV::SW))
       .addFrameIndex(FI)
       .addImm(0)
       .addMemOperand(MMOLo);
   BuildMI(*BB, MI, DL, TII.get(RISCV::SW))
       .addReg(HiReg, getKillRegState(MI.getOperand(2).isKill()))
       .addFrameIndex(FI)
       .addImm(4)
       .addMemOperand(MMOHi);
-  TII.loadRegFromStackSlot(*BB, MI, DstReg, FI, DstRC, RI);
+  TII.loadRegFromStackSlot(*BB, MI, DstReg, FI, DstRC, RI, Register());
   MI.eraseFromParent(); // The pseudo instruction is gone now.
   return BB;
 }
 
 static bool isSelectPseudo(MachineInstr &MI) {
   switch (MI.getOpcode()) {
   default:
     return false;

llvm/lib/Target/RISCV/RISCVInstrInfo.h

public:
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                    const DebugLoc &DL, MCRegister DstReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI, Register SrcReg,
                            bool IsKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI, Register DstReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   using TargetInstrInfo::foldMemoryOperandImpl;
   MachineInstr *foldMemoryOperandImpl(MachineFunction &MF, MachineInstr &MI,
                                       ArrayRef<unsigned> Ops,
                                       MachineBasicBlock::iterator InsertPt,
                                       int FrameIndex,
                                       LiveIntervals *LIS = nullptr,
                                       VirtRegMap *VRM = nullptr) const override;

llvm/lib/Target/RISCV/RISCVInstrInfo.cpp

BuildMI(MBB, MBBI, DL, get(Opc), DstReg)
         .addReg(SrcReg, getKillRegState(KillSrc));
   }
 }
 
 void RISCVInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
                                          MachineBasicBlock::iterator I,
                                          Register SrcReg, bool IsKill, int FI,
                                          const TargetRegisterClass *RC,
-                                         const TargetRegisterInfo *TRI) const {
+                                         const TargetRegisterInfo *TRI,
+                                         Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   MachineFunction *MF = MBB.getParent();
   MachineFrameInfo &MFI = MF->getFrameInfo();
 
   unsigned Opcode;
BuildMI(MBB, I, DL, get(Opcode))
         .addMemOperand(MMO);
   }
 }
 
 void RISCVInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                           MachineBasicBlock::iterator I,
                                           Register DstReg, int FI,
                                           const TargetRegisterClass *RC,
-                                          const TargetRegisterInfo *TRI) const {
+                                          const TargetRegisterInfo *TRI,
+                                          Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   MachineFunction *MF = MBB.getParent();
   MachineFrameInfo &MFI = MF->getFrameInfo();
 
   unsigned Opcode;
else {
     // Pick s11 because it doesn't make a difference.
     TmpGPR = RISCV::X27;
 
     int FrameIndex = RVFI->getBranchRelaxationScratchFrameIndex();
     if (FrameIndex == -1)
       report_fatal_error("underestimated function size");
 
     storeRegToStackSlot(MBB, MI, TmpGPR, /*IsKill=*/true, FrameIndex,
-                        &RISCV::GPRRegClass, TRI);
+                        &RISCV::GPRRegClass, TRI, Register());
     TRI->eliminateFrameIndex(std::prev(MI.getIterator()),
                              /*SpAdj=*/0, /*FIOperandNum=*/1);
 
     MI.getOperand(1).setMBB(&RestoreBB);
 
     loadRegFromStackSlot(RestoreBB, RestoreBB.end(), TmpGPR, FrameIndex,
-                         &RISCV::GPRRegClass, TRI);
+                         &RISCV::GPRRegClass, TRI, Register());
     TRI->eliminateFrameIndex(RestoreBB.back(),
                              /*SpAdj=*/0, /*FIOperandNum=*/1);
   }
 
   MRI.replaceRegWith(ScratchReg, TmpGPR);
   MRI.clearVirtRegs();
 }
 

llvm/lib/Target/Sparc/SparcInstrInfo.h

public:
   bool
   reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   Register getGlobalBaseReg(MachineFunction *MF) const;
 
   // Lower pseudo instructions after register allocation.
   bool expandPostRAPseudo(MachineInstr &MI) const override;
 };
 
 }
 
 #endif

llvm/lib/Target/Sparc/SparcInstrInfo.cpp

for (unsigned i = 0; i != numSubRegs; ++i) {
     MovMI = MIB.getInstr();
   }
   // Add implicit super-register defs and kills to the last MovMI.
   MovMI->addRegisterDefined(DestReg, TRI);
   if (KillSrc)
     MovMI->addRegisterKilled(SrcReg, TRI);
 }
 
-void SparcInstrInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void SparcInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
+                                         MachineBasicBlock::iterator I,
                                          Register SrcReg, bool isKill, int FI,
                                          const TargetRegisterClass *RC,
-                    const TargetRegisterInfo *TRI) const {
+                                         const TargetRegisterInfo *TRI,
+                                         Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end()) DL = I->getDebugLoc();
 
   MachineFunction *MF = MBB.getParent();
   const MachineFrameInfo &MFI = MF->getFrameInfo();
   MachineMemOperand *MMO = MF->getMachineMemOperand(
       MachinePointerInfo::getFixedStack(*MF, FI), MachineMemOperand::MOStore,
       MFI.getObjectSize(FI), MFI.getObjectAlign(FI));
else if (SP::QFPRegsRegClass.hasSubClassEq(RC))
     // Use STQFri irrespective of its legality. If STQ is not legal, it will be
     // lowered into two STDs in eliminateFrameIndex.
     BuildMI(MBB, I, DL, get(SP::STQFri)).addFrameIndex(FI).addImm(0)
       .addReg(SrcReg,  getKillRegState(isKill)).addMemOperand(MMO);
   else
     llvm_unreachable("Can't store this register to stack slot");
 }
 
-void SparcInstrInfo::
-loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+void SparcInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                          MachineBasicBlock::iterator I,
                                           Register DestReg, int FI,
                                           const TargetRegisterClass *RC,
-                     const TargetRegisterInfo *TRI) const {
+                                          const TargetRegisterInfo *TRI,
+                                          Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end()) DL = I->getDebugLoc();
 
   MachineFunction *MF = MBB.getParent();
   const MachineFrameInfo &MFI = MF->getFrameInfo();
   MachineMemOperand *MMO = MF->getMachineMemOperand(
       MachinePointerInfo::getFixedStack(*MF, FI), MachineMemOperand::MOLoad,
       MFI.getObjectSize(FI), MFI.getObjectAlign(FI));

llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp

bool SystemZELFFrameLowering::spillCalleeSavedRegisters(
   }
 
   // Save FPRs/VRs in the normal TargetInstrInfo way.
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     if (SystemZ::FP64BitRegClass.contains(Reg)) {
       MBB.addLiveIn(Reg);
       TII->storeRegToStackSlot(MBB, MBBI, Reg, true, I.getFrameIdx(),
-                               &SystemZ::FP64BitRegClass, TRI);
+                               &SystemZ::FP64BitRegClass, TRI, Register());
     }
     if (SystemZ::VR128BitRegClass.contains(Reg)) {
       MBB.addLiveIn(Reg);
       TII->storeRegToStackSlot(MBB, MBBI, Reg, true, I.getFrameIdx(),
-                               &SystemZ::VR128BitRegClass, TRI);
+                               &SystemZ::VR128BitRegClass, TRI, Register());
     }
   }
 
   return true;
 }
 
 bool SystemZELFFrameLowering::restoreCalleeSavedRegisters(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
     MutableArrayRef<CalleeSavedInfo> CSI, const TargetRegisterInfo *TRI) const {
   if (CSI.empty())
     return false;
 
   MachineFunction &MF = *MBB.getParent();
   const TargetInstrInfo *TII = MF.getSubtarget().getInstrInfo();
   SystemZMachineFunctionInfo *ZFI = MF.getInfo<SystemZMachineFunctionInfo>();
   bool HasFP = hasFP(MF);
   DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
 
   // Restore FPRs/VRs in the normal TargetInstrInfo way.
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     if (SystemZ::FP64BitRegClass.contains(Reg))
       TII->loadRegFromStackSlot(MBB, MBBI, Reg, I.getFrameIdx(),
-                                &SystemZ::FP64BitRegClass, TRI);
+                                &SystemZ::FP64BitRegClass, TRI, Register());
     if (SystemZ::VR128BitRegClass.contains(Reg))
       TII->loadRegFromStackSlot(MBB, MBBI, Reg, I.getFrameIdx(),
-                                &SystemZ::VR128BitRegClass, TRI);
+                                &SystemZ::VR128BitRegClass, TRI, Register());
   }
 
   // Restore call-saved GPRs (but not call-clobbered varargs, which at
   // this point might hold return values).
   SystemZ::GPRRegs RestoreGPRs = ZFI->getRestoreGPRRegs();
   if (RestoreGPRs.LowGPR) {
     // If we saved any of %r2-%r5 as varargs, we should also be saving
     // and restoring %r6.  If we're saving %r6 or above, we should be
bool SystemZXPLINKFrameLowering::spillCalleeSavedRegisters(
   }
 
   // Spill FPRs to the stack in the normal TargetInstrInfo way
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     if (SystemZ::FP64BitRegClass.contains(Reg)) {
       MBB.addLiveIn(Reg);
       TII->storeRegToStackSlot(MBB, MBBI, Reg, true, I.getFrameIdx(),
-                               &SystemZ::FP64BitRegClass, TRI);
+                               &SystemZ::FP64BitRegClass, TRI, Register());
     }
     if (SystemZ::VR128BitRegClass.contains(Reg)) {
       MBB.addLiveIn(Reg);
       TII->storeRegToStackSlot(MBB, MBBI, Reg, true, I.getFrameIdx(),
-                               &SystemZ::VR128BitRegClass, TRI);
+                               &SystemZ::VR128BitRegClass, TRI, Register());
     }
   }
 
   return true;
 }
 
 bool SystemZXPLINKFrameLowering::restoreCalleeSavedRegisters(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
bool SystemZXPLINKFrameLowering::restoreCalleeSavedRegisters(
 
   DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
 
   // Restore FPRs in the normal TargetInstrInfo way.
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     if (SystemZ::FP64BitRegClass.contains(Reg))
       TII->loadRegFromStackSlot(MBB, MBBI, Reg, I.getFrameIdx(),
-                                &SystemZ::FP64BitRegClass, TRI);
+                                &SystemZ::FP64BitRegClass, TRI, Register());
     if (SystemZ::VR128BitRegClass.contains(Reg))
       TII->loadRegFromStackSlot(MBB, MBBI, Reg, I.getFrameIdx(),
-                                &SystemZ::VR128BitRegClass, TRI);
+                                &SystemZ::VR128BitRegClass, TRI, Register());
   }
 
   // Restore call-saved GPRs (but not call-clobbered varargs, which at
   // this point might hold return values).
   SystemZ::GPRRegs RestoreGPRs = ZFI->getRestoreGPRRegs();
   if (RestoreGPRs.LowGPR) {
     assert(isInt<20>(Regs.getStackPointerBias() + RestoreGPRs.GPROffset));
     if (RestoreGPRs.LowGPR == RestoreGPRs.HighGPR)

llvm/lib/Target/SystemZ/SystemZInstrInfo.h

public:
   bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles,
                             BranchProbability Probability) const override;
   bool PredicateInstruction(MachineInstr &MI,
                             ArrayRef<MachineOperand> Pred) const override;
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MBBI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MBBI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MBBI,
-                            Register DestReg, int FrameIdx,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MBBI, Register DestReg,
+                            int FrameIdx, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
   MachineInstr *convertToThreeAddress(MachineInstr &MI, LiveVariables *LV,
                                       LiveIntervals *LIS) const override;
   MachineInstr *
   foldMemoryOperandImpl(MachineFunction &MF, MachineInstr &MI,
                         ArrayRef<unsigned> Ops,
                         MachineBasicBlock::iterator InsertPt, int FrameIndex,
                         LiveIntervals *LIS = nullptr,
                         VirtRegMap *VRM = nullptr) const override;

llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp

void SystemZInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
 
   BuildMI(MBB, MBBI, DL, get(Opcode), DestReg)
     .addReg(SrcReg, getKillRegState(KillSrc));
 }
 
 void SystemZInstrInfo::storeRegToStackSlot(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register SrcReg,
     bool isKill, int FrameIdx, const TargetRegisterClass *RC,
-    const TargetRegisterInfo *TRI) const {
+    const TargetRegisterInfo *TRI, Register VReg) const {
   DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
 
   // Callers may expect a single instruction, so keep 128-bit moves
   // together for now and lower them after register allocation.
   unsigned LoadOpcode, StoreOpcode;
   getLoadStoreOpcodes(RC, LoadOpcode, StoreOpcode);
   addFrameReference(BuildMI(MBB, MBBI, DL, get(StoreOpcode))
                         .addReg(SrcReg, getKillRegState(isKill)),
                     FrameIdx);
 }
 
-void SystemZInstrInfo::loadRegFromStackSlot(
-    MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register DestReg,
-    int FrameIdx, const TargetRegisterClass *RC,
-    const TargetRegisterInfo *TRI) const {
+void SystemZInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
+                                            MachineBasicBlock::iterator MBBI,
+                                            Register DestReg, int FrameIdx,
+                                            const TargetRegisterClass *RC,
+                                            const TargetRegisterInfo *TRI,
+                                            Register VReg) const {
   DebugLoc DL = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
 
   // Callers may expect a single instruction, so keep 128-bit moves
   // together for now and lower them after register allocation.
   unsigned LoadOpcode, StoreOpcode;
   getLoadStoreOpcodes(RC, LoadOpcode, StoreOpcode);
   addFrameReference(BuildMI(MBB, MBBI, DL, get(LoadOpcode), DestReg),
                     FrameIdx);

llvm/lib/Target/VE/VEInstrInfo.h

public:
   unsigned isLoadFromStackSlot(const MachineInstr &MI,
                                int &FrameIndex) const override;
   unsigned isStoreToStackSlot(const MachineInstr &MI,
                               int &FrameIndex) const override;
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MBBI, Register SrcReg,
                            bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MBBI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
   /// } Stack Spill & Reload
 
   /// Optimization {
 
   bool FoldImmediate(MachineInstr &UseMI, MachineInstr &DefMI, Register Reg,
                      MachineRegisterInfo *MRI) const override;
 
   /// } Optimization

llvm/lib/Target/VE/VEInstrInfo.cpp

unsigned VEInstrInfo::isStoreToStackSlot(const MachineInstr &MI,
   }
   return 0;
 }
 
 void VEInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
                                       MachineBasicBlock::iterator I,
                                       Register SrcReg, bool isKill, int FI,
                                       const TargetRegisterClass *RC,
-                                      const TargetRegisterInfo *TRI) const {
+                                      const TargetRegisterInfo *TRI,
+                                      Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   MachineFunction *MF = MBB.getParent();
   const MachineFrameInfo &MFI = MF->getFrameInfo();
   MachineMemOperand *MMO = MF->getMachineMemOperand(
       MachinePointerInfo::getFixedStack(*MF, FI), MachineMemOperand::MOStore,
void VEInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
   } else
     report_fatal_error("Can't store this register to stack slot");
 }
 
 void VEInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                        MachineBasicBlock::iterator I,
                                        Register DestReg, int FI,
                                        const TargetRegisterClass *RC,
-                                       const TargetRegisterInfo *TRI) const {
+                                       const TargetRegisterInfo *TRI,
+                                       Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end())
     DL = I->getDebugLoc();
 
   MachineFunction *MF = MBB.getParent();
   const MachineFrameInfo &MFI = MF->getFrameInfo();
   MachineMemOperand *MMO = MF->getMachineMemOperand(
       MachinePointerInfo::getFixedStack(*MF, FI), MachineMemOperand::MOLoad,

llvm/lib/Target/X86/X86FastPreTileConfig.cpp

void X86FastPreTileConfig::spill(MachineBasicBlock::iterator Before,
                                  Register VirtReg, bool Kill) {
   LLVM_DEBUG(dbgs() << "Spilling " << printReg(VirtReg, TRI) << " \n");
   int FI = getStackSpaceFor(VirtReg);
   LLVM_DEBUG(dbgs() << " to stack slot #" << FI << '\n');
 
   const TargetRegisterClass &RC = *MRI->getRegClass(VirtReg);
   // Don't need shape information for tile store, becasue it is adjacent to
   // the tile def instruction.
-  TII->storeRegToStackSlot(*MBB, Before, VirtReg, Kill, FI, &RC, TRI);
+  TII->storeRegToStackSlot(*MBB, Before, VirtReg, Kill, FI, &RC, TRI,
+                           Register());
   ++NumStores;
 
   // TODO: update DBG_VALUEs
 }
 
 /// Insert reload instruction for \p PhysReg before \p Before.
 void X86FastPreTileConfig::reload(MachineBasicBlock::iterator UseMI,
                                   Register OrigReg, MachineOperand *RowMO,

llvm/lib/Target/X86/X86FrameLowering.cpp

for (const CalleeSavedInfo &I : llvm::reverse(CSI)) {
     MVT VT = MVT::Other;
     if (X86::VK16RegClass.contains(Reg))
       VT = STI.hasBWI() ? MVT::v64i1 : MVT::v16i1;
 
     // Add the callee-saved register as live-in. It's killed at the spill.
     MBB.addLiveIn(Reg);
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg, VT);
 
-    TII.storeRegToStackSlot(MBB, MI, Reg, true, I.getFrameIdx(), RC, TRI);
+    TII.storeRegToStackSlot(MBB, MI, Reg, true, I.getFrameIdx(), RC, TRI,
+                            Register());
     --MI;
     MI->setFlag(MachineInstr::FrameSetup);
     ++MI;
   }
 
   return true;
 }
 
if (X86::GR64RegClass.contains(Reg) ||
       continue;
 
     // If this is k-register make sure we lookup via the largest legal type.
     MVT VT = MVT::Other;
     if (X86::VK16RegClass.contains(Reg))
       VT = STI.hasBWI() ? MVT::v64i1 : MVT::v16i1;
 
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg, VT);
-    TII.loadRegFromStackSlot(MBB, MI, Reg, I.getFrameIdx(), RC, TRI);
+    TII.loadRegFromStackSlot(MBB, MI, Reg, I.getFrameIdx(), RC, TRI,
+                             Register());
   }
 
   // POP GPRs.
   unsigned Opc = STI.is64Bit() ? X86::POP64r : X86::POP32r;
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     if (!X86::GR64RegClass.contains(Reg) &&
         !X86::GR32RegClass.contains(Reg))

llvm/lib/Target/X86/X86InstrInfo.h

void insertSelect(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                     Register FalseReg) const override;
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
   void storeRegToStackSlot(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI, Register SrcReg,
                            bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI, Register DestReg,
                             int FrameIndex, const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   void loadStoreTileReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
                         unsigned Opc, Register Reg, int FrameIdx,
                         bool isKill = false) const;
 
   bool expandPostRAPseudo(MachineInstr &MI) const override;
 
   /// Check whether the target can fold a load that feeds a subreg operand

llvm/lib/Target/X86/X86InstrInfo.cpp

case X86::TILELOADD: {
     MachineOperand &MO = NewMI->getOperand(1 + X86::AddrIndexReg);
     MO.setReg(VirtReg);
     MO.setIsKill(true);
     break;
   }
   }
 }
 
-void X86InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                       MachineBasicBlock::iterator MI,
-                                       Register SrcReg, bool isKill,
-                                       int FrameIdx,
-                                       const TargetRegisterClass *RC,
-                                       const TargetRegisterInfo *TRI) const {
+void X86InstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, Register SrcReg,
+    bool isKill, int FrameIdx, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   const MachineFunction &MF = *MBB.getParent();
   const MachineFrameInfo &MFI = MF.getFrameInfo();
   assert(MFI.getObjectSize(FrameIdx) >= TRI->getSpillSize(*RC) &&
          "Stack slot too small for store");
 
   unsigned Alignment = std::max<uint32_t>(TRI->getSpillSize(*RC), 16);
   bool isAligned =
       (Subtarget.getFrameLowering()->getStackAlign() >= Alignment) ||
       (RI.canRealignStack(MF) && !MFI.isFixedObjectIndex(FrameIdx));
 
   unsigned Opc = getStoreRegOpcode(SrcReg, RC, isAligned, Subtarget);
   if (isAMXOpcode(Opc))
     loadStoreTileReg(MBB, MI, Opc, SrcReg, FrameIdx, isKill);
   else
     addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc)), FrameIdx)
         .addReg(SrcReg, getKillRegState(isKill));
 }
 
 void X86InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                         MachineBasicBlock::iterator MI,
                                         Register DestReg, int FrameIdx,
                                         const TargetRegisterClass *RC,
-                                        const TargetRegisterInfo *TRI) const {
+                                        const TargetRegisterInfo *TRI,
+                                        Register VReg) const {
   const MachineFunction &MF = *MBB.getParent();
   const MachineFrameInfo &MFI = MF.getFrameInfo();
   assert(MFI.getObjectSize(FrameIdx) >= TRI->getSpillSize(*RC) &&
          "Load size exceeds stack slot");
   unsigned Alignment = std::max<uint32_t>(TRI->getSpillSize(*RC), 16);
   bool isAligned =
       (Subtarget.getFrameLowering()->getStackAlign() >= Alignment) ||
       (RI.canRealignStack(MF) && !MFI.isFixedObjectIndex(FrameIdx));

llvm/lib/Target/XCore/XCoreFrameLowering.cpp

bool XCoreFrameLowering::spillCalleeSavedRegisters(
   for (const CalleeSavedInfo &I : CSI) {
     Register Reg = I.getReg();
     assert(Reg != XCore::LR && !(Reg == XCore::R10 && hasFP(*MF)) &&
            "LR & FP are always handled in emitPrologue");
 
     // Add the callee-saved register as live-in. It's killed at the spill.
     MBB.addLiveIn(Reg);
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-    TII.storeRegToStackSlot(MBB, MI, Reg, true, I.getFrameIdx(), RC, TRI);
+    TII.storeRegToStackSlot(MBB, MI, Reg, true, I.getFrameIdx(), RC, TRI,
+                            Register());
     if (emitFrameMoves) {
       auto Store = MI;
       --Store;
       XFI->getSpillLabels().push_back(std::make_pair(Store, I));
     }
   }
   return true;
 }
 
 bool XCoreFrameLowering::restoreCalleeSavedRegisters(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
     MutableArrayRef<CalleeSavedInfo> CSI, const TargetRegisterInfo *TRI) const {
   MachineFunction *MF = MBB.getParent();
   const TargetInstrInfo &TII = *MF->getSubtarget().getInstrInfo();
   bool AtStart = MI == MBB.begin();
   MachineBasicBlock::iterator BeforeI = MI;
   if (!AtStart)
     --BeforeI;
   for (const CalleeSavedInfo &CSR : CSI) {
     Register Reg = CSR.getReg();
     assert(Reg != XCore::LR && !(Reg == XCore::R10 && hasFP(*MF)) &&
            "LR & FP are always handled in emitEpilogue");
 
     const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(Reg);
-    TII.loadRegFromStackSlot(MBB, MI, Reg, CSR.getFrameIdx(), RC, TRI);
+    TII.loadRegFromStackSlot(MBB, MI, Reg, CSR.getFrameIdx(), RC, TRI,
+                             Register());
     assert(MI != MBB.begin() &&
            "loadRegFromStackSlot didn't insert any code!");
     // Insert in reverse order.  loadRegFromStackSlot can insert multiple
     // instructions.
     if (AtStart)
       MI = MBB.begin();
     else {
       MI = BeforeI;

llvm/lib/Target/XCore/XCoreInstrInfo.h

public:
   unsigned removeBranch(MachineBasicBlock &MBB,
                         int *BytesRemoved = nullptr) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
                    bool KillSrc) const override;
 
   void storeRegToStackSlot(MachineBasicBlock &MBB,
-                           MachineBasicBlock::iterator MI,
-                           Register SrcReg, bool isKill, int FrameIndex,
+                           MachineBasicBlock::iterator MI, Register SrcReg,
+                           bool isKill, int FrameIndex,
                            const TargetRegisterClass *RC,
-                           const TargetRegisterInfo *TRI) const override;
+                           const TargetRegisterInfo *TRI,
+                           Register VReg) const override;
 
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator MI,
-                            Register DestReg, int FrameIndex,
-                            const TargetRegisterClass *RC,
-                            const TargetRegisterInfo *TRI) const override;
+                            MachineBasicBlock::iterator MI, Register DestReg,
+                            int FrameIndex, const TargetRegisterClass *RC,
+                            const TargetRegisterInfo *TRI,
+                            Register VReg) const override;
 
   bool reverseBranchCondition(
                           SmallVectorImpl<MachineOperand> &Cond) const override;
 
   // Emit code before MBBI to load immediate value into physical register Reg.
   // Returns an iterator to the new instruction.
   MachineBasicBlock::iterator loadImmediate(MachineBasicBlock &MBB,
                                             MachineBasicBlock::iterator MI,
                                             unsigned Reg, uint64_t Value) const;
 };
 
 }
 
 #endif

llvm/lib/Target/XCore/XCoreInstrInfo.cpp

void XCoreInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
   if (DestReg == XCore::SP && GRSrc) {
     BuildMI(MBB, I, DL, get(XCore::SETSP_1r))
       .addReg(SrcReg, getKillRegState(KillSrc));
     return;
   }
   llvm_unreachable("Impossible reg-to-reg copy");
 }
 
-void XCoreInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
-                                         MachineBasicBlock::iterator I,
-                                         Register SrcReg, bool isKill,
-                                         int FrameIndex,
-                                         const TargetRegisterClass *RC,
-                                         const TargetRegisterInfo *TRI) const
-{
+void XCoreInstrInfo::storeRegToStackSlot(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator I, Register SrcReg,
+    bool isKill, int FrameIndex, const TargetRegisterClass *RC,
+    const TargetRegisterInfo *TRI, Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end() && !I->isDebugInstr())
     DL = I->getDebugLoc();
   MachineFunction *MF = MBB.getParent();
   const MachineFrameInfo &MFI = MF->getFrameInfo();
   MachineMemOperand *MMO = MF->getMachineMemOperand(
       MachinePointerInfo::getFixedStack(*MF, FrameIndex),
       MachineMemOperand::MOStore, MFI.getObjectSize(FrameIndex),
       MFI.getObjectAlign(FrameIndex));
   BuildMI(MBB, I, DL, get(XCore::STWFI))
     .addReg(SrcReg, getKillRegState(isKill))
     .addFrameIndex(FrameIndex)
     .addImm(0)
     .addMemOperand(MMO);
 }
 
 void XCoreInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                           MachineBasicBlock::iterator I,
                                           Register DestReg, int FrameIndex,
                                           const TargetRegisterClass *RC,
-                                          const TargetRegisterInfo *TRI) const
-{
+                                          const TargetRegisterInfo *TRI,
+                                          Register VReg) const {
   DebugLoc DL;
   if (I != MBB.end() && !I->isDebugInstr())
     DL = I->getDebugLoc();
   MachineFunction *MF = MBB.getParent();
   const MachineFrameInfo &MFI = MF->getFrameInfo();
   MachineMemOperand *MMO = MF->getMachineMemOperand(
       MachinePointerInfo::getFixedStack(*MF, FrameIndex),
       MachineMemOperand::MOLoad, MFI.getObjectSize(FrameIndex),