1 files changed, 3 insertions, 0 deletions
diff --git a/src/passes/OnceReduction.cpp b/src/passes/OnceReduction.cpp
index 73e221c69..83ee7378b 100644
--- a/src/passes/OnceReduction.cpp
+++ b/src/passes/OnceReduction.cpp
@@ -156,6 +156,9 @@ struct Scanner : public WalkerPass<PostWalker<Scanner>> {
     //    foo$once = 1;
     //    ...
     //
+    // TODO: if we generalize this to allow more conditions than just a
+    //       global.get, this could be merged with
+    //       SimplifyGlobals::GlobalUseScanner::visitFunction().
     auto* block = body->dynCast<Block>();
     if (!block) {
       return Name();