Precompute: Optimize array.len (#6299)

Arrays have immutable length, so we can optimize them like immutable fields.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/passes/Precompute.cpp b/src/passes/Precompute.cpp
index 5baf2331f..d2f3543ad 100644
--- a/src/passes/Precompute.cpp
+++ b/src/passes/Precompute.cpp
@@ -178,7 +178,7 @@ public:
     // Otherwise, we've failed to precompute.
     return Flow(NONCONSTANT_FLOW);
   }
-  Flow visitArrayLen(ArrayLen* curr) { return Flow(NONCONSTANT_FLOW); }
+  // ArrayLen is not disallowed here as it is an immutable property.
   Flow visitArrayCopy(ArrayCopy* curr) { return Flow(NONCONSTANT_FLOW); }
 
   // Generates heap info for a heap-allocating expression.