Don't relocate temporary variable which receives property access, unless it's provable that this property don't have side effects

js/js.translator/testData/js-optimizer/temporary-variable/methodCall.optimized.js

@@ -52,6 +52,13 @@ function test5() {
     return $tmp1 + $tmp2 + $tmp3;
 }
 
+function test6() {
+    init();
+
+    var $tmp = foo(1);
+    return foo(2) + $tmp;
+}
+
 function box() {
     var result = test1();
     if (result != 3) return "fail1a: " + result;
@@ -73,5 +80,9 @@ function box() {
     if (result != 6) return "fail5a: " + result;
     if (log != "{1}{2}{3}{4}") return "fail5b: " + log;
 
+    result = test6();
+    if (result != 3) return "fail6a: " + result;
+    if (log != "{1}{2}") return "fail6b: " + result;
+
     return "OK";
 }