Remove preexisting kill flags in RegAllocLocal, just like LiveVariables does.

This should make it possible to start producing kill flags in isel without
breaking stuff.

llvm-svn: 102976

lib/CodeGen/RegAllocLocal.cpp

@@ -644,6 +644,9 @@ void RALocal::ComputeLocalLiveness(MachineBasicBlock& MBB) {
       if (!MO.isReg() || !MO.getReg() || !MO.isUse())
         continue;
 
+      // Ignore helpful kill flags from earlier passes.
+      MO.setIsKill(false);
+
       LastUseDef[MO.getReg()] = std::make_pair(I, i);
       
       if (TargetRegisterInfo::isVirtualRegister(MO.getReg())) continue;