Don't swap binary ops when "use asm" is in effect.

Refs #167

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/ast.js b/lib/ast.js
index a1301da8..b8e89f23 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -945,6 +945,9 @@ TreeWalker.prototype = {
             if (x instanceof type) return x;
         }
     },
+    has_directive: function(type) {
+        return this.find_parent(AST_Scope).has_directive(type);
+    },
     in_boolean_context: function() {
         var stack = this.stack;
         var i = stack.length, self = stack[--i];