[interpreter] Fix peephole rule on eliding last before jump.

test/mjsunit/ignition/regress-629792-source-position-on-jump.js

Index: test/mjsunit/ignition/regress-629792-source-position-on-jump.js
diff --git a/test/mjsunit/compiler/regress-572409.js b/test/mjsunit/ignition/regress-629792-source-position-on-jump.js
similarity index 59%
copy from test/mjsunit/compiler/regress-572409.js
copy to test/mjsunit/ignition/regress-629792-source-position-on-jump.js
index 126b622625ad4455b4bd2e309ee10e32eb02989e..f87caf681a00af7d47b878013e1344f1cfd94c72 100644
--- a/test/mjsunit/compiler/regress-572409.js
+++ b/test/mjsunit/ignition/regress-629792-source-position-on-jump.js
@@ -2,9 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-var o = function() {};
-function f() {
-  var lit = { __proto__: o  };
-  o instanceof RegExp;
+function f(t) {
+  var f = t || this;
+  for (var i in t) {
+    for (var j in t) {
+      (j);
+      continue;
+    }
+  }
 }
 f();