Dead code elimination.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96496 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/PHIElimination.cpp

@@ -56,7 +56,6 @@ bool llvm::PHIElimination::runOnMachineFunction(MachineFunction &Fn) {
   MRI = &Fn.getRegInfo();
 
   PHIDefs.clear();
-  PHIKills.clear();
   bool Changed = false;
 
   // Split critical edges to help the coalescer
@@ -276,9 +275,6 @@ void llvm::PHIElimination::LowerAtomicPHINode(
     // path the PHI.
     MachineBasicBlock &opBlock = *MPhi->getOperand(i*2+2).getMBB();
 
-    // Record the kill.
-    PHIKills[SrcReg].insert(&opBlock);
-
     // If source is defined by an implicit def, there is no need to insert a
     // copy.
     MachineInstr *DefMI = MRI->getVRegDef(SrcReg);