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/propertyAccess.optimized.js

@@ -0,0 +1,24 @@
+var log = "";
+
+A = {};
+Object.defineProperty(A, "x", {
+    get: function() {
+        log += "A.x;";
+        return 23;
+    }
+});
+
+function b() {
+    log += "b();";
+    return 42;
+}
+
+function box() {
+    var $tmp = A.x;
+    var result = b() + ";" + $tmp;
+
+    if (result != "42;23") return "fail1: " + result;
+    if (log != "A.x;b();") return "fail2: " + log;
+
+    return "OK";
+}