[es6] Don't eliminate tail calls from for-in and for-of bodies.

test/mjsunit/es6/tail-call.js

Index: test/mjsunit/es6/tail-call.js
diff --git a/test/mjsunit/es6/tail-call.js b/test/mjsunit/es6/tail-call.js
index 318519b3551c0b939e9fdcbfef883c11c384708f..d3e35d6e1cc73253f44d267772a3431d0ceba946 100644
--- a/test/mjsunit/es6/tail-call.js
+++ b/test/mjsunit/es6/tail-call.js
@@ -247,6 +247,52 @@ function f_153(expected_call_stack, a) {
 })();
 
 
+// Tail calling from various statements.
+(function() {
+  function g1() {
+    for (var v in {a:0}) {
+      return f_153([f_153, g1, test]);
+    }
+  }
+
+  function g2() {
+    for (var v of [1, 2, 3]) {
+      return f_153([f_153, g2, test]);
+    }
+  }
+
+  function g3() {
+    for (var i = 0; i < 10; i++) {
+      return f_153([f_153, test]);
+    }
+  }
+
+  function g4() {
+    while (true) {
+      return f_153([f_153, test]);
+    }
+  }
+
+  function g5() {
+    do {
+      return f_153([f_153, test]);
+    } while (true);
+  }
+
+  function test() {
+    assertEquals(153, g1());
+    assertEquals(153, g2());
+    assertEquals(153, g3());
+    assertEquals(153, g4());
+    assertEquals(153, g5());
+  }
+  test();
+  test();
+  %OptimizeFunctionOnNextCall(test);
+  test();
+})();
+
+
 // Test tail calls from try-catch constructs.
 (function() {
   function tc1(a) {