[Wasm GC] Add negated BrOn* operations (#3913)

They are basically the flip versions. The only interesting part in the impl is that their
returned typed and sent types are different.

Spec: https://docs.google.com/document/d/1DklC3qVuOdLHSXB5UXghM_syCh-4cMinQ50ICiXnK3Q/edit

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ir/branch-utils.h b/src/ir/branch-utils.h
index 662f70725..87f7813e7 100644
--- a/src/ir/branch-utils.h
+++ b/src/ir/branch-utils.h
@@ -81,7 +81,7 @@ void operateOnScopeNameUsesAndSentTypes(Expression* expr, T func) {
     } else if (auto* sw = expr->dynCast<Switch>()) {
       func(name, sw->value ? sw->value->type : Type::none);
     } else if (auto* br = expr->dynCast<BrOn>()) {
-      func(name, br->getCastType());
+      func(name, br->getSentType());
     } else {
       assert(expr->is<Try>() || expr->is<Rethrow>()); // delegate or rethrow
     }