2 files changed, 2 insertions, 0 deletions
diff --git a/src/optimize/mod.rs b/src/optimize/mod.rs
index f6d02e999e1..29ad5321d57 100644
--- a/src/optimize/mod.rs
+++ b/src/optimize/mod.rs
@@ -5,6 +5,7 @@ mod stack2reg;
 
 pub fn optimize_function<'tcx>(
     tcx: TyCtxt<'tcx>,
+    #[cfg_attr(not(debug_assertions), allow(unused_variables))]
     instance: Instance<'tcx>,
     ctx: &mut Context,
     cold_blocks: &EntitySet<Block>,
diff --git a/src/optimize/stack2reg.rs b/src/optimize/stack2reg.rs
index 757e608d733..b21f838111c 100644
--- a/src/optimize/stack2reg.rs
+++ b/src/optimize/stack2reg.rs
@@ -162,6 +162,7 @@ impl<'a> OptimizeContext<'a> {
 
 pub(super) fn optimize_function(
     ctx: &mut Context,
+    #[cfg_attr(not(debug_assertions), allow(unused_variables))]
     clif_comments: &mut crate::pretty_clif::CommentWriter,
 ) {
     combine_stack_addr_with_load_store(&mut ctx.func);