Add support for reference types proposal (#2451)

This adds support for the reference type proposal. This includes support
for all reference types (`anyref`, `funcref`(=`anyfunc`), and `nullref`)
and four new instructions: `ref.null`, `ref.is_null`, `ref.func`, and
new typed `select`. This also adds subtype relationship support between
reference types.

This does not include table instructions yet. This also does not include
wasm2js support.

Fixes #2444 and fixes #2447.

1 files changed, 2 insertions, 1 deletions

diff --git a/test/binaryen.js/exception-handling.js b/test/binaryen.js/exception-handling.js
index 6a1b32ed7..5ee53667c 100644
--- a/test/binaryen.js/exception-handling.js
+++ b/test/binaryen.js/exception-handling.js
@@ -18,7 +18,8 @@ function stringify(expr) {
 
 function test() {
   var module = new Binaryen.Module();
-  module.setFeatures(Binaryen.Features.ExceptionHandling);
+  module.setFeatures(Binaryen.Features.ReferenceTypes |
+                     Binaryen.Features.ExceptionHandling);
 
   var event_ = module.addEvent("e", 0, Binaryen.i32, Binaryen.none);