minor

1 files changed, 14 insertions, 11 deletions

diff --git a/lib/compress.js b/lib/compress.js
index 5cbb31c9..a7a6172b 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1477,7 +1477,21 @@ merge(Compressor.prototype, {
         return this;
     });
 
+    var commutativeOperators = makePredicate("== === != !== * & | ^");
+
     OPT(AST_Binary, function(self, compressor){
+        function reverse(op) {
+            if (op) self.operator = op;
+            var tmp = self.left;
+            self.left = self.right;
+            self.right = tmp;
+        };
+        if (commutativeOperators(self.operator)) {
+            if (self.right instanceof AST_Constant
+                && !(self.left instanceof AST_Constant)) {
+                reverse();
+            }
+        }
         self = self.lift_sequences(compressor);
         if (compressor.option("comparisons")) switch (self.operator) {
           case "===":
@@ -1489,11 +1503,6 @@ merge(Compressor.prototype, {
             // XXX: intentionally falling down to the next case
           case "==":
           case "!=":
-            if (self.right instanceof AST_Constant && !(self.left instanceof AST_Constant)) {
-                var tmp = self.left;
-                self.left = self.right;
-                self.right = tmp;
-            }
             if (self.left instanceof AST_String
                 && self.left.value == "undefined"
                 && self.right instanceof AST_UnaryPrefix
@@ -1560,12 +1569,6 @@ merge(Compressor.prototype, {
                 });
                 self = best_of(self, negated);
             }
-            var reverse = function(op) {
-                self.operator = op;
-                var tmp = self.left;
-                self.left = self.right;
-                self.right = tmp;
-            };
             switch (self.operator) {
               case "<": reverse(">"); break;
               case "<=": reverse(">="); break;