Use llvm::copy. NFC

llvm-svn: 347126
diff --git a/llvm/lib/Analysis/MemorySSAUpdater.cpp b/llvm/lib/Analysis/MemorySSAUpdater.cpp
index 880dc2f..1ac5818 100644
--- a/llvm/lib/Analysis/MemorySSAUpdater.cpp
+++ b/llvm/lib/Analysis/MemorySSAUpdater.cpp
@@ -93,7 +93,7 @@
         // FIXME: Figure out whether this is dead code and if so remove it.
         if (!std::equal(Phi->op_begin(), Phi->op_end(), PhiOps.begin())) {
           // These will have been filled in by the recursive read we did above.
-          std::copy(PhiOps.begin(), PhiOps.end(), Phi->op_begin());
+          llvm::copy(PhiOps, Phi->op_begin());
           std::copy(pred_begin(BB), pred_end(BB), Phi->block_begin());
         }
       } else {