when creating blocks in binary format parsing, we know if a block has a break to it - use that to avoid rescanning blocks for unreachability purposes (#1495)

1 files changed, 1 insertions, 0 deletions

diff --git a/src/wasm-binary.h b/src/wasm-binary.h
index e03fd29ea..b8eb86d31 100644
--- a/src/wasm-binary.h
+++ b/src/wasm-binary.h
@@ -890,6 +890,7 @@ public:
     BreakTarget(Name name, int arity) : name(name), arity(arity) {}
   };
   std::vector<BreakTarget> breakStack;
+  // the names that breaks target. this lets us know if a block has breaks to it or not.
   std::unordered_set<Name> breakTargetNames;
 
   std::vector<Expression*> expressionStack;