Merge branch 'master' into harmony-v3.0.15

lib/compress.js

@@ -1718,6 +1718,63 @@ merge(Compressor.prototype, {
             }
             throw def;
         });
+        var object_fns = [
+            'constructor',
+            'toString',
+            'valueOf',
+        ];
+        var native_fns = {
+            Array: makePredicate([
+                'indexOf',
+                'join',
+                'lastIndexOf',
+                'slice',
+            ].concat(object_fns)),
+            Boolean: makePredicate(object_fns),
+            Number: makePredicate([
+                'toExponential',
+                'toFixed',
+                'toPrecision',
+            ].concat(object_fns)),
+            RegExp: makePredicate([
+                'test',
+            ].concat(object_fns)),
+            String: makePredicate([
+                'charAt',
+                'charCodeAt',
+                'concat',
+                'indexOf',
+                'italics',
+                'lastIndexOf',
+                'match',
+                'replace',
+                'search',
+                'slice',
+                'split',
+                'substr',
+                'substring',
+                'trim',
+            ].concat(object_fns)),
+        };
+        def(AST_Call, function(compressor){
+            var exp = this.expression;
+            if (compressor.option("unsafe") && exp instanceof AST_PropAccess) {
+                var key = exp.property;
+                if (key instanceof AST_Node) {
+                    key = ev(key, compressor);
+                }
+                var val = ev(exp.expression, compressor);
+                if ((val && native_fns[val.constructor.name] || return_false)(key)) {
+                    return val[key].apply(val, this.args.map(function(arg) {
+                        return ev(arg, compressor);
+                    }));
+                }
+            }
+            throw def;
+        });
+        def(AST_New, function(compressor){
+            throw def;
+        });
     })(function(node, func){
         node.DEFMETHOD("_eval", func);
     });
@@ -3312,6 +3369,11 @@ merge(Compressor.prototype, {
             && is_iife_call(self)) {
             return self.negate(compressor, true);
         }
+        var ev = self.evaluate(compressor);
+        if (ev !== self) {
+            ev = make_node_from_constant(ev, self).optimize(compressor);
+            return best_of(compressor, ev, self);
+        }
         return self;
     });