// Replace uses with ZeroReg.
for (MachineRegisterInfo::use_iterator U = MRI->use_begin(DstReg),
- E = MRI->use_end(); U != E; ++U) {
+ E = MRI->use_end(); U != E;) {
MachineOperand &MO = U.getOperand();
+ unsigned OpNo = U.getOperandNo();
MachineInstr *MI = MO.getParent();
+ ++U;
// Do not replace if it is a phi's operand or is tied to def operand.
- if (MI->isPHI() || MI->isRegTiedToDefOperand(U.getOperandNo()) ||
- MI->isPseudo())
+ if (MI->isPHI() || MI->isRegTiedToDefOperand(OpNo) || MI->isPseudo())
continue;
MO.setReg(ZeroReg);
define void @zero_u(%struct.unaligned* nocapture %p) nounwind {
entry:
+; CHECK: swl $zero
; CHECK: swr $zero
%x = getelementptr inbounds %struct.unaligned* %p, i32 0, i32 0
store i32 0, i32* %x, align 1