99   // If the node is only used by a CopyToReg and the dest reg is a vreg, use  in EmitCopyFromReg()
100   // the CopyToReg'd destination register instead of creating a new vreg.  in EmitCopyFromReg()
202     // is a vreg in the same register class, use the CopyToReg'd destination  in CreateVirtualRegisters()
203     // register instead of creating a new vreg.  in CreateVirtualRegisters()
277     Register VReg = MRI->createVirtualRegister(RC);  in getVR()  local
279             TII->get(TargetOpcode::IMPLICIT_DEF), VReg);  in getVR()
280     return VReg;  in getVR()
327   Register VReg = getVR(Op, VRBaseMap);  in AddRegisterOperand()  local
335   // shrink VReg's register class within reason.  For example, if VReg == GR32  in AddRegisterOperand()
336   // and II requires a GR32_NOSP, just constrain VReg to GR32_NOSP.  in AddRegisterOperand()
351         = MRI->constrainRegClass(VReg, OpRC, MinNumRegs);  in AddRegisterOperand()
357                 TII->get(TargetOpcode::COPY), NewVReg).addReg(VReg);  in AddRegisterOperand()
358         VReg = NewVReg;  in AddRegisterOperand()
361            "Constraining an allocatable VReg produced an unallocatable class?");  in AddRegisterOperand()
391   MIB.addReg(VReg, getDefRegState(isOptDef) | getKillRegState(isKill) |  in AddRegisterOperand()
412     Register VReg = R->getReg();  in AddOperand()  local
424     if (OpRC && IIRC && OpRC != IIRC && VReg.isVirtual()) {  in AddOperand()
427                TII->get(TargetOpcode::COPY), NewVReg).addReg(VReg);  in AddOperand()
428       VReg = NewVReg;  in AddOperand()
434     MIB.addReg(VReg, getImplRegState(Imp));  in AddOperand()
476 Register InstrEmitter::ConstrainForSubReg(Register VReg, unsigned SubIdx,  in ConstrainForSubReg()  argument
478   const TargetRegisterClass *VRC = MRI->getRegClass(VReg);  in ConstrainForSubReg()
481   // RC is a sub-class of VRC that supports SubIdx.  Try to constrain VReg  in ConstrainForSubReg()
484     RC = MRI->constrainRegClass(VReg, RC, MinRCSize);  in ConstrainForSubReg()
486   // VReg has been adjusted.  It can be used with SubIdx operands now.  in ConstrainForSubReg()
488     return VReg;  in ConstrainForSubReg()
490   // VReg couldn't be reasonably constrained.  Emit a COPY to a new virtual  in ConstrainForSubReg()
496     .addReg(VReg);  in ConstrainForSubReg()
508   // If the node is only used by a CopyToReg and the dest reg is a vreg, use  in EmitSubregNode()
509   // the CopyToReg'd destination register instead of creating a new vreg.  in EmitSubregNode()
638   unsigned VReg = getVR(Node->getOperand(0), VRBaseMap);  in EmitCopyToRegClassNode()  local
640   // Create the new VReg in the destination class and emit a copy.  in EmitCopyToRegClassNode()
646     NewVReg).addReg(VReg);  in EmitCopyToRegClassNode()
677       // Skip physical registers as they don't have a vreg to get and we'll  in EmitRegSequence()
764     case SDDbgOperand::VREG:  in AddDbgValueLocationOps()
827   // defines a VReg, it can depend for example on the order blocks are  in EmitDbgInstrRef()
833   // i.e., point the instruction at the vreg, and patch it up later in  in EmitDbgInstrRef()
835   auto AddVRegOp = [&](unsigned VReg) {  in EmitDbgInstrRef()  argument
837         /* Reg */ VReg, /* isDef */ false, /* isImp */ false,  in EmitDbgInstrRef()
848     unsigned VReg;  in EmitDbgInstrRef()  local
850     if (DbgOperand.getKind() == SDDbgOperand::VREG) {  in EmitDbgInstrRef()
851       VReg = DbgOperand.getVReg();  in EmitDbgInstrRef()
853       // No definition means that block hasn't been emitted yet. Leave a vreg  in EmitDbgInstrRef()
855       if (!MRI->hasOneDef(VReg)) {  in EmitDbgInstrRef()
856         AddVRegOp(VReg);  in EmitDbgInstrRef()
860       DefMI = &*MRI->def_instr_begin(VReg);  in EmitDbgInstrRef()
862       // Look up the corresponding VReg for the given SDNode, if any.  in EmitDbgInstrRef()
866       // No VReg -> produce a DBG_VALUE $noreg instead.  in EmitDbgInstrRef()
871       VReg = getVR(Op, VRBaseMap);  in EmitDbgInstrRef()
873       // Again, if there's no instruction defining the VReg right now, fix it up  in EmitDbgInstrRef()
875       if (!MRI->hasOneDef(VReg)) {  in EmitDbgInstrRef()
876         AddVRegOp(VReg);  in EmitDbgInstrRef()
880       DefMI = &*MRI->def_instr_begin(VReg);  in EmitDbgInstrRef()
891       AddVRegOp(VReg);  in EmitDbgInstrRef()
895     // Find the operand number which defines the specified VReg.  in EmitDbgInstrRef()
898       if (MO.isReg() && MO.isDef() && MO.getReg() == VReg)  in EmitDbgInstrRef()
1225       Register VReg = getVR(GluedNode->getOperand(0), VRBaseMap);  in EmitMachineNode()  local
1226       MachineOperand MO = MachineOperand::CreateReg(VReg, /*isDef=*/false,  in EmitMachineNode()
1257       // Instead building a COPY to that vreg destination, build an  in EmitSpecialNode()