opt-level >= 4

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/rustc_mir_transform/src/normalize_array_len.rs b/compiler/rustc_mir_transform/src/normalize_array_len.rs
index 7ed4cb402c7..60e71130cd1 100644
--- a/compiler/rustc_mir_transform/src/normalize_array_len.rs
+++ b/compiler/rustc_mir_transform/src/normalize_array_len.rs
@@ -15,9 +15,9 @@ pub struct NormalizeArrayLen;
 
 impl<'tcx> MirPass<'tcx> for NormalizeArrayLen {
     fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
-        // if tcx.sess.mir_opt_level() < 3 {
-        //     return;
-        // }
+        if tcx.sess.mir_opt_level() < 4 {
+            return;
+        }
 
         // early returns for edge cases of highly unrolled functions
         if body.basic_blocks().len() > MAX_NUM_BLOCKS {