Rewrite temporary variable elimination

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

@@ -0,0 +1,24 @@
+function foo() {
+    throw "foo";
+}
+
+function bar() {
+    var $tmp = foo();
+    try {
+        return "result: " + $tmp;
+    } catch (e) {
+        return "error";
+    }
+}
+
+function box() {
+    try {
+        bar()
+    } catch (e) {
+        if (e == "foo") {
+            return "OK"
+        }
+        return e;
+    }
+    return "Exception expected";
+}