1 //===---------------------- ProcessImplicitDefs.cpp -----------------------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
31   const TargetRegisterInfo *TRI = nullptr;  member in __anonb70e92d00111::ProcessImplicitDefs
70   if (!MI->isCopyLike() &&  in canTurnIntoImplicitDef()
71       !MI->isInsertSubreg() &&  in canTurnIntoImplicitDef()
72       !MI->isRegSequence() &&  in canTurnIntoImplicitDef()
73       !MI->isPHI())  in canTurnIntoImplicitDef()
75   for (const MachineOperand &MO : MI->all_uses())  in canTurnIntoImplicitDef()
83   Register Reg = MI->getOperand(0).getReg();  in processImplicitDef()
87     // implicit-def when possible.  in processImplicitDef()
88     for (MachineOperand &MO : MRI->use_nodbg_operands(Reg)) {  in processImplicitDef()
94       UserMI->setDesc(TII->get(TargetOpcode::IMPLICIT_DEF));  in processImplicitDef()
97     MI->eraseFromParent();  in processImplicitDef()
101   // This is a physreg implicit-def.  in processImplicitDef()
103   MachineBasicBlock::instr_iterator UserMI = MI->getIterator();  in processImplicitDef()
104   MachineBasicBlock::instr_iterator UserE = MI->getParent()->instr_end();  in processImplicitDef()
107     for (MachineOperand &MO : UserMI->operands()) {  in processImplicitDef()
111       if (!UserReg.isPhysical() || !TRI->regsOverlap(Reg, UserReg))  in processImplicitDef()
125     MI->eraseFromParent();  in processImplicitDef()
131   for (unsigned i = MI->getNumOperands() - 1; i; --i)  in processImplicitDef()
132     MI->removeOperand(i);  in processImplicitDef()
136 /// processImplicitDefs - Process IMPLICIT_DEF instructions and turn them into
146   TRI = MF.getSubtarget().getRegisterInfo();  in runOnMachineFunction()
148   assert(WorkList.empty() && "Inconsistent worklist state");  in runOnMachineFunction()