diff options
| -rw-r--r-- | lib/CodeGen/MachineVerifier.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/MachineVerifier.cpp b/lib/CodeGen/MachineVerifier.cpp index a13d39e868..59864fb3a4 100644 --- a/lib/CodeGen/MachineVerifier.cpp +++ b/lib/CodeGen/MachineVerifier.cpp @@ -365,7 +365,8 @@ MachineVerifier::visitMachineOperand(const MachineOperand *MO, unsigned MONum) addRegWithSubRegs(regsKilled, Reg); } // Explicit use of a dead register. - if (!MO->isImplicit() && !regsLive.count(Reg)) { + // A register use marked <undef> is OK. + if (!MO->isImplicit() && !MO->isUndef() && !regsLive.count(Reg)) { if (TargetRegisterInfo::isPhysicalRegister(Reg)) { // Reserved registers may be used even when 'dead'. if (!isReserved(Reg)) |