[TableGen] Move the ConversionRow vector into the ConversionTable instead of copying.

llvm-svn: 245190
diff --git a/llvm/utils/TableGen/AsmMatcherEmitter.cpp b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
index 8403aa5..30dbb11 100644
--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
@@ -1974,7 +1974,7 @@
       continue;
 
     // Add the row to the table.
-    ConversionTable.push_back(ConversionRow);
+    ConversionTable.push_back(std::move(ConversionRow));
   }
 
   // Finish up the converter driver function.