Lines Matching defs:Def

254 // Test whether Def is safe and profitable to rematerialize.
255 static bool shouldRematerialize(const MachineInstr &Def,
257   return Def.isAsCheapAsAMove() && TII->isTriviallyReMaterializable(Def);
267   if (MachineInstr *Def = MRI.getUniqueVRegDef(Reg))
268     return Def;
270   // MRI doesn't know what the Def is. Try asking LIS.
278 // Test whether Reg, as defined at Def, has exactly one use. This is a
281 static bool hasOneNonDBGUse(unsigned Reg, MachineInstr *Def,
291       LI.getVNInfoAt(LIS.getInstructionIndex(*Def).getRegSlot());
306 // Test whether it's safe to move Def to just before Insert.
311 static bool isSafeToMove(const MachineOperand *Def, const MachineOperand *Use,
315   const MachineInstr *DefI = Def->getParent();
331   if (Def != DefI->defs().begin())
522                                       MachineInstr *Def, MachineBasicBlock &MBB,
526   LLVM_DEBUG(dbgs() << "Move for single use: "; Def->dump());
528   WebAssemblyDebugValueManager DefDIs(Def);
530   LIS.handleMove(*Def);
548     LI.removeSegment(LIS.getInstructionIndex(*Def).getRegSlot(),
554     LLVM_DEBUG(dbgs() << " - Replaced register: "; Def->dump());
557   imposeStackOrdering(Def);
558   return Def;
571     unsigned Reg, MachineOperand &Op, MachineInstr &Def, MachineBasicBlock &MBB,
575   LLVM_DEBUG(dbgs() << "Rematerializing cheap def: "; Def.dump());
578   WebAssemblyDebugValueManager DefDIs(&Def);
597     IsDead = !LI.liveAt(LIS.getInstructionIndex(Def).getDeadSlot());
603     SlotIndex Idx = LIS.getInstructionIndex(Def).getRegSlot();
606     LIS.RemoveMachineInstrFromMaps(Def);
618 ///    Reg = INST ...        // Def
625 ///    DefReg = INST ...     // Def (to become the new Insert)
634     unsigned Reg, MachineOperand &Op, MachineInstr *Def, MachineBasicBlock &MBB,
637   LLVM_DEBUG(dbgs() << "Move and tee for multi-use:"; Def->dump());
643   // Move Def into place.
644   WebAssemblyDebugValueManager DefDIs(Def);
646   LIS.handleMove(*Def);
649   MachineOperand &DefMO = Def->getOperand(0);
657   SlotIndex DefIdx = LIS.getInstructionIndex(*Def).getRegSlot();
659   // Tell LiveIntervals we moved the original vreg def from Def to Tee.
672   imposeStackOrdering(Def);
681   LLVM_DEBUG(dbgs() << " - Replaced register: "; Def->dump());
683   return Def;
868         MachineOperand *Def =
870         assert(Def != nullptr);
879         bool CanMove = SameBlock && isSafeToMove(Def, &Use, Insert, MFI, MRI) &&