We are already setting <undef> flags, and that is good enough. The
<imp-def> operands don't mean anything any more.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152009
91177308-0d34-0410-b5e6-
96231b3b80d8
SmallVector<unsigned,8> Ops;
bool Reads, Writes;
tie(Reads, Writes) = UseMI->readsWritesVirtualRegister(SrcReg, &Ops);
SmallVector<unsigned,8> Ops;
bool Reads, Writes;
tie(Reads, Writes) = UseMI->readsWritesVirtualRegister(SrcReg, &Ops);
- bool Kills = false, Deads = false;
// Replace SrcReg with DstReg in all UseMI operands.
for (unsigned i = 0, e = Ops.size(); i != e; ++i) {
MachineOperand &MO = UseMI->getOperand(Ops[i]);
// Replace SrcReg with DstReg in all UseMI operands.
for (unsigned i = 0, e = Ops.size(); i != e; ++i) {
MachineOperand &MO = UseMI->getOperand(Ops[i]);
- Kills |= MO.isKill();
- Deads |= MO.isDead();
// Make sure we don't create read-modify-write defs accidentally. We
// assume here that a SrcReg def cannot be joined into a live DstReg. If
// Make sure we don't create read-modify-write defs accidentally. We
// assume here that a SrcReg def cannot be joined into a live DstReg. If
if (JoinedCopies.count(UseMI))
continue;
if (JoinedCopies.count(UseMI))
continue;
- if (SubIdx) {
- // If UseMI was a simple SrcReg def, make sure we didn't turn it into a
- // read-modify-write of DstReg.
- if (Deads)
- UseMI->addRegisterDead(DstReg, TRI);
- else if (!Reads && Writes)
- UseMI->addRegisterDefined(DstReg, TRI);
-
- // Kill flags apply to the whole physical register.
- if (DstIsPhys && Kills)
- UseMI->addRegisterKilled(DstReg, TRI);
- }
-
DEBUG({
dbgs() << "\t\tupdated: ";
if (!UseMI->isDebugValue())
DEBUG({
dbgs() << "\t\tupdated: ";
if (!UseMI->isDebugValue())