diff --git a/src/script_opt/Expr.cc b/src/script_opt/Expr.cc
index 6904da0337..6988f06354 100644
--- a/src/script_opt/Expr.cc
+++ b/src/script_opt/Expr.cc
@@ -229,7 +229,7 @@ ExprPtr Expr::ReduceToConditional(Reducer* c, StmtPtr& red_stmt) {
         // conditional.
         StmtPtr red_stmt2;
         new_me = new_me->ReduceToConditional(c, red_stmt2);
-        red_stmt = MergeStmts(red_stmt, red_stmt2);
+        red_stmt = MergeStmts(std::move(red_stmt), std::move(red_stmt2));
 
         return new_me;
     }
@@ -252,7 +252,7 @@ ExprPtr Expr::ReduceToConditional(Reducer* c, StmtPtr& red_stmt) {
 
             StmtPtr red_stmt2;
             auto res = Reduce(c, red_stmt2);
-            red_stmt = MergeStmts(red_stmt, red_stmt2);
+            red_stmt = MergeStmts(std::move(red_stmt), std::move(red_stmt2));
             return res;
         }
 
@@ -2950,7 +2950,7 @@ bool ScriptOptBuiltinExpr::IsPure() const { return arg1->IsPure() && (! arg2 ||
 
 ExprPtr ScriptOptBuiltinExpr::Duplicate() {
     auto new_me = make_intrusive<ScriptOptBuiltinExpr>(tag, arg1, arg2);
-    return with_location_of(new_me, this);
+    return with_location_of(std::move(new_me), this);
 }
 
 bool ScriptOptBuiltinExpr::IsReduced(Reducer* c) const {
@@ -2980,7 +2980,7 @@ ExprPtr ScriptOptBuiltinExpr::Reduce(Reducer* c, StmtPtr& red_stmt) {
         if ( arg2 ) {
             StmtPtr red_stmt2;
             arg2 = arg2->Reduce(c, red_stmt2);
-            red_stmt = MergeStmts(red_stmt, red_stmt2);
+            red_stmt = MergeStmts(std::move(red_stmt), std::move(red_stmt2));
         }
     }
 
diff --git a/src/script_opt/ZAM/BuiltIn.cc b/src/script_opt/ZAM/BuiltIn.cc
index 85bae5130f..6a6016e813 100644
--- a/src/script_opt/ZAM/BuiltIn.cc
+++ b/src/script_opt/ZAM/BuiltIn.cc
@@ -290,7 +290,7 @@ MultiZBI::MultiZBI(std::string name, bool _ret_val_matters, BiFArgsInfo _args_in
     : ZAMBuiltIn(std::move(name), _ret_val_matters), args_info(std::move(_args_info)), type_arg(_type_arg) {}
 
 MultiZBI::MultiZBI(std::string name, BiFArgsInfo _args_info, BiFArgsInfo _assign_args_info, int _type_arg)
-    : MultiZBI(std::move(name), false, _args_info, _type_arg) {
+    : MultiZBI(std::move(name), false, std::move(_args_info), _type_arg) {
     assign_args_info = std::move(_assign_args_info);
     have_both = true;
 }
diff --git a/src/script_opt/ZAM/Ops.in b/src/script_opt/ZAM/Ops.in
index 0c6c5d1847..387bd6b382 100644
--- a/src/script_opt/ZAM/Ops.in
+++ b/src/script_opt/ZAM/Ops.in
@@ -1233,7 +1233,7 @@ direct-unary-op Record-Constructor ConstructRecord
 macro ConstructRecordPost()
 	auto& r = frame[z.v1].record_val;
 	Unref(r);
-	r = new RecordVal(cast_intrusive<RecordType>(z.t), init_vals);
+	r = new RecordVal(cast_intrusive<RecordType>(z.t), std::move(init_vals));
 
 op Construct-Direct-Record
 type V