Reachability bugfix.

src/frontend.rs

@@ -1296,7 +1296,7 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
                         out,
                         params,
                         results,
-                        merge_reachable,
+                        merge_reachable: merge_reachable || self.reachable,
                     });
                     self.cur_block = el;
                     self.locals.start_block(el, self.reachable);

src/ir/module.rs

@@ -224,7 +224,6 @@ impl<'a> Module<'a> {
         let mut module = frontend::wasm_to_ir(bytes)?;
         for func_decl in module.funcs.values_mut() {
             if let Some(body) = func_decl.body_mut() {
-                crate::passes::rpo::run(body);
                 let cfg = crate::cfg::CFGInfo::new(body);
                 crate::passes::basic_opt::gvn(body, &cfg);
                 crate::passes::resolve_aliases::run(body);