LivePhysRegs: Remove redundant check

llvm-svn: 265509

diff --git a/llvm/lib/CodeGen/LivePhysRegs.cpp b/llvm/lib/CodeGen/LivePhysRegs.cpp
index be8c02c..6cb3ee1 100644 (file)
--- a/llvm/lib/CodeGen/LivePhysRegs.cpp
+++ b/llvm/lib/CodeGen/LivePhysRegs.cpp
@@ -57,7 +57,7 @@ void LivePhysRegs::stepBackward(const MachineInstr &MI) {
 
   // Add uses to the set.
   for (ConstMIBundleOperands O(MI); O.isValid(); ++O) {
-    if (!O->isReg() || !O->readsReg() || O->isUndef())
+    if (!O->isReg() || !O->readsReg())
       continue;
     unsigned Reg = O->getReg();
     if (Reg == 0)