diff options
| -rw-r--r-- | lib/CodeGen/MachineInstr.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index e008c9a61b..5da6a317cb 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -780,6 +780,7 @@ bool MachineInstr::addRegisterDead(unsigned IncomingReg, const TargetRegisterInfo *RegInfo, bool AddIfNotFound) { bool isPhysReg = TargetRegisterInfo::isPhysicalRegister(IncomingReg); + bool hasAliases = isPhysReg && RegInfo->getAliasSet(IncomingReg) == 0; bool Found = false; SmallVector<unsigned,4> DeadOps; for (unsigned i = 0, e = getNumOperands(); i != e; ++i) { @@ -790,7 +791,7 @@ bool MachineInstr::addRegisterDead(unsigned IncomingReg, if (Reg == IncomingReg) { MO.setIsDead(); Found = true; - } else if (isPhysReg && MO.isDead() && + } else if (hasAliases && MO.isDead() && TargetRegisterInfo::isPhysicalRegister(Reg)) { // There exists a super-register that's marked dead. if (RegInfo->isSuperRegister(IncomingReg, Reg)) |