Remove RTTs (#4848)

RTTs were removed from the GC spec and if they are added back in in the future,
they will be heap types rather than value types as in our implementation.
Updating our implementation to have RTTs be heap types would have been more work
than deleting them for questionable benefit since we don't know how long it will
be before they are specced again.

1 files changed, 2 insertions, 3 deletions

diff --git a/src/passes/Precompute.cpp b/src/passes/Precompute.cpp
index bbaa6d533..35f218362 100644
--- a/src/passes/Precompute.cpp
+++ b/src/passes/Precompute.cpp
@@ -514,9 +514,8 @@ private:
     if (type.isRef()) {
       return false;
     }
-    // For now, don't try to precompute an Rtt. TODO figure out when that would
-    // be safe and useful.
-    return !type.isRtt();
+
+    return true;
   }
 };