[interpreter] Extend test for OSR from within generators.

test/mjsunit/ignition/osr-from-generator.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --allow-natives-syntax
 
 (function TestGeneratorOSRSimple() {
   function* gen1() {
     for (var i = 0; i < 3; ++i) {
       if (i == 1) %OptimizeOsr();
     }
     return 23;
   }
   var g = gen1();
   assertEquals({ value:23, done:true }, g.next());
 })();
 
-(function TestGeneratorOSRYield() {
+(function TestGeneratorOSRYieldAfterArming() {
   function* gen2() {
     for (var i = 0; i < 3; ++i) {
       if (i == 1) %OptimizeOsr();
       yield i;
     }
     return 23;
   }
   var g = gen2();
   assertEquals({ value:0, done:false }, g.next());
   assertEquals({ value:1, done:false }, g.next());
   assertEquals({ value:2, done:false }, g.next());
   assertEquals({ value:23, done:true }, g.next());
 })();
 
+(function TestGeneratorOSRYieldBeforeArming() {
+  function* gen3() {
+    for (var i = 0; i < 3; ++i) {
+      yield i;
+      if (i == 1) %OptimizeOsr();
+    }
+    return 23;
+  }
+  var g = gen3();
+  assertEquals({ value:0, done:false }, g.next());
+  assertEquals({ value:1, done:false }, g.next());
+  assertEquals({ value:2, done:false }, g.next());
+  assertEquals({ value:23, done:true }, g.next());
+})();
+
 (function TestGeneratorOSRNested() {
-  function* gen3() {
+  function* gen4() {
     for (var i = 0; i < 3; ++i) {
       for (var j = 0; j < 3; ++j) {
         for (var k = 0; k < 10; ++k) {
           if (k == 5) %OptimizeOsr();
         }
       }
       yield i;
     }
     return 23;
   }
-  var g = gen3();
+  var g = gen4();
   assertEquals({ value:0, done:false }, g.next());
   assertEquals({ value:1, done:false }, g.next());
   assertEquals({ value:2, done:false }, g.next());
   assertEquals({ value:23, done:true }, g.next());
 })();