simplify.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84465 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 304900f..3e4c823 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -517,9 +517,7 @@
       }
 
       // Code: [strchar x N]
-      const char *StrBegin = MDS->begin();
-      for (unsigned i = 0, e = MDS->length(); i != e; ++i)
-        Record.push_back(StrBegin[i]);
+      Record.append(MDS->begin(), MDS->end());
 
       // Emit the finished record.
       Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);