Index: lldb/packages/Python/lldbsuite/test/functionalities/register/register_command/TestRegisters.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/functionalities/register/register_command/TestRegisters.py
+++ lldb/packages/Python/lldbsuite/test/functionalities/register/register_command/TestRegisters.py
@@ -187,7 +187,8 @@
         elif not value.IsValid():
             return  # If register doesn't exist, skip this test
 
-        self.runCmd("register write " + register + " \'" + new_value + "\'")
+        # Also test the 're' alias.
+        self.runCmd("re write " + register + " \'" + new_value + "\'")
         self.expect(
             "register read " +
             register,
Index: lldb/source/Interpreter/CommandInterpreter.cpp
===================================================================
--- lldb/source/Interpreter/CommandInterpreter.cpp
+++ lldb/source/Interpreter/CommandInterpreter.cpp
@@ -429,6 +429,11 @@
     AddAlias("var", cmd_obj_sp);
     AddAlias("vo", cmd_obj_sp, "--object-description");
   }
+
+  cmd_obj_sp = GetCommandSPExact("register", false);
+  if (cmd_obj_sp) {
+    AddAlias("re", cmd_obj_sp);
+  }
 }
 
 void CommandInterpreter::Clear() {