Revert r144568 now that r144730 has fixed the fast-isel kill marker bug.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144776 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 7a0fcb5..53c63a0 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -502,8 +502,7 @@
       continue;
     if (!UI.getOperand().isKill())
       return 0;
-    if (KillMI)
-      return 0;  // -O0 kill markers cannot be trusted?
+    assert(!KillMI && "More than one local kills?");
     KillMI = UseMI;
   }