Fix for-loop with const/let and empty condition/iteration statements.

test/mjsunit/harmony/empty-for.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
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 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
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 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+// Flags: --harmony-scoping
 
-var __v_0 = {};
-var __v_5 = {};
-function __f_2() {
-  this.__defineGetter__('str', function() { return __f_2(this); });
-  this.str = "1";
-  this.toString = function() {
-    return this.str;
-  };
-};
+"use strict";
 
-__v_5 = new __f_2();
-__v_0 = new __f_2();
-
-function __f_5(fun,a,b) {
-  __v_5.str = a;
-  __v_0.str = b;
-  fun(__v_5, __v_0);
+function for_const() {
+  for (const x = 1;;) {
+    if (x == 1) break;
+  }
+  for (const x = 1; x < 2;) {
+    if (x == 1) break;
+  }
+  for (const x = 1;; 0) {
+    if (x == 1) break;
+  }
 }
 
-function __f_8(a,b) { return a%b };
+for_const();
 
-__f_5(__f_8, 1 << 30, 1);
-__f_5(__f_8, 1, 1 << 30);
-%OptimizeFunctionOnNextCall(__f_8);
-__f_5(__f_8, 1, 1 << 30);
+function for_let() {
+  for (let x;;) {
+    if (!x) break;
+  }
+  for (let x; x < 2;) {
+    if (!x) break;
+  }
+  for (let x = 1;; x++) {
+    if (x == 2) break;
+  }
+}
+
+for_let();
+
+function for_var() {
+  for (var x;;) {
+    if (!x) break;
+  }
+  for (var x; x < 2;) {
+    if (!x) break;
+  }
+  for (var x = 1;; x++) {
+    if (x == 2) break;
+  }
+}
+
+for_var();