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1 files changed, 1 insertions, 1 deletions

diff --git a/src/passes/CoalesceLocals.cpp b/src/passes/CoalesceLocals.cpp
index d74500bb5..ba2c6dd81 100644
--- a/src/passes/CoalesceLocals.cpp
+++ b/src/passes/CoalesceLocals.cpp
@@ -225,7 +225,7 @@ struct CoalesceLocals : public WalkerPass<CFGWalker<CoalesceLocals, Visitor<Coal
 
   // copying state
 
-  std::vector<uint8_t> copies; // canonicalized - accesses should check (low, high)
+  std::vector<uint8_t> copies; // canonicalized - accesses should check (low, high) TODO: use a map for high N, as this tends to be sparse? or don't look at copies at all for big N?
   std::vector<Index> totalCopies; // total # of copies for each local, with all others
 
   void addCopy(Index i, Index j) {