219 static bool ShouldRematerialize(const MachineInstr &Def, AliasAnalysis &AA,  in ShouldRematerialize()  argument
221   return Def.isAsCheapAsAMove() && TII->isTriviallyReMaterializable(Def, &AA);  in ShouldRematerialize()
232   if (MachineInstr *Def = MRI.getUniqueVRegDef(Reg))  in GetVRegDef()  local
233     return Def;  in GetVRegDef()
246 static bool HasOneUse(unsigned Reg, MachineInstr *Def,  in HasOneUse()  argument
256       LIS.getInstructionIndex(*Def).getRegSlot());  in HasOneUse()
276 static bool IsSafeToMove(const MachineInstr *Def, const MachineInstr *Insert,  in IsSafeToMove()  argument
279   assert(Def->getParent() == Insert->getParent());  in IsSafeToMove()
282   for (const MachineOperand &MO : Def->operands()) {  in IsSafeToMove()
312         (MO.isDef() || Def->definesRegister(Reg)) ?  in IsSafeToMove()
313         LI.getVNInfoAt(LIS.getInstructionIndex(*Def).getRegSlot()) :  in IsSafeToMove()
314         LI.getVNInfoBefore(LIS.getInstructionIndex(*Def));  in IsSafeToMove()
322   Query(*Def, AA, Read, Write, Effects, StackPointer);  in IsSafeToMove()
330   MachineBasicBlock::const_iterator D(Def), I(Insert);  in IsSafeToMove()
435                                       MachineInstr *Def,  in MoveForSingleUse()  argument
440   DEBUG(dbgs() << "Move for single use: "; Def->dump());  in MoveForSingleUse()
442   MBB.splice(Insert, &MBB, Def);  in MoveForSingleUse()
443   LIS.handleMove(*Def);  in MoveForSingleUse()
453     Def->getOperand(0).setReg(NewReg);  in MoveForSingleUse()
461     LI.removeSegment(LIS.getInstructionIndex(*Def).getRegSlot(),  in MoveForSingleUse()
467     DEBUG(dbgs() << " - Replaced register: "; Def->dump());  in MoveForSingleUse()
470   ImposeStackOrdering(Def);  in MoveForSingleUse()
471   return Def;  in MoveForSingleUse()
477     unsigned Reg, MachineOperand &Op, MachineInstr &Def, MachineBasicBlock &MBB,  in RematerializeCheapDef()  argument
481   DEBUG(dbgs() << "Rematerializing cheap def: "; Def.dump());  in RematerializeCheapDef()
485   TII->reMaterialize(MBB, Insert, NewReg, 0, Def, *TRI);  in RematerializeCheapDef()
500     IsDead = !LI.liveAt(LIS.getInstructionIndex(Def).getDeadSlot());  in RematerializeCheapDef()
506     SlotIndex Idx = LIS.getInstructionIndex(Def).getRegSlot();  in RematerializeCheapDef()
509     LIS.RemoveMachineInstrFromMaps(Def);  in RematerializeCheapDef()
510     Def.eraseFromParent();  in RematerializeCheapDef()
537     unsigned Reg, MachineOperand &Op, MachineInstr *Def, MachineBasicBlock &MBB,  in MoveAndTeeForMultiUse()  argument
540   DEBUG(dbgs() << "Move and tee for multi-use:"; Def->dump());  in MoveAndTeeForMultiUse()
543   MBB.splice(Insert, &MBB, Def);  in MoveAndTeeForMultiUse()
544   LIS.handleMove(*Def);  in MoveAndTeeForMultiUse()
550   MachineOperand &DefMO = Def->getOperand(0);  in MoveAndTeeForMultiUse()
558   SlotIndex DefIdx = LIS.getInstructionIndex(*Def).getRegSlot();  in MoveAndTeeForMultiUse()
573   ImposeStackOrdering(Def);  in MoveAndTeeForMultiUse()
576   DEBUG(dbgs() << " - Replaced register: "; Def->dump());  in MoveAndTeeForMultiUse()
578   return Def;  in MoveAndTeeForMultiUse()
754         MachineInstr *Def = GetVRegDef(Reg, Insert, MRI, LIS);  in runOnMachineFunction()  local
755         if (!Def)  in runOnMachineFunction()
760         if (Def->getOpcode() == TargetOpcode::INLINEASM)  in runOnMachineFunction()
765         if (Def->getOpcode() == WebAssembly::ARGUMENT_I32 ||  in runOnMachineFunction()
766             Def->getOpcode() == WebAssembly::ARGUMENT_I64 ||  in runOnMachineFunction()
767             Def->getOpcode() == WebAssembly::ARGUMENT_F32 ||  in runOnMachineFunction()
768             Def->getOpcode() == WebAssembly::ARGUMENT_F64)  in runOnMachineFunction()
777         bool SameBlock = Def->getParent() == &MBB;  in runOnMachineFunction()
778         bool CanMove = SameBlock && IsSafeToMove(Def, Insert, AA, LIS, MRI) &&  in runOnMachineFunction()
780         if (CanMove && HasOneUse(Reg, Def, MRI, MDT, LIS)) {  in runOnMachineFunction()
781           Insert = MoveForSingleUse(Reg, Op, Def, MBB, Insert, LIS, MFI, MRI);  in runOnMachineFunction()
782         } else if (ShouldRematerialize(*Def, AA, TII)) {  in runOnMachineFunction()
784               RematerializeCheapDef(Reg, Op, *Def, MBB, Insert->getIterator(),  in runOnMachineFunction()
788           Insert = MoveAndTeeForMultiUse(Reg, Op, Def, MBB, Insert, LIS, MFI,  in runOnMachineFunction()