Do not generate LDummyUse instruction for HCapturedObject

test/mjsunit/regress/regress-captured-object-no-dummy-use.js

Index: test/mjsunit/regress/regress-captured-object-no-dummy-use.js
diff --git a/test/mjsunit/neuter-twice.js b/test/mjsunit/regress/regress-captured-object-no-dummy-use.js
similarity index 51%
copy from test/mjsunit/neuter-twice.js
copy to test/mjsunit/regress/regress-captured-object-no-dummy-use.js
index 3501cee4330f966c1eeaf6f5b7ebdc6418f2bcec..cdf548d5fa6790a41237c9108a18731fc7e7b04d 100644
--- a/test/mjsunit/neuter-twice.js
+++ b/test/mjsunit/regress/regress-captured-object-no-dummy-use.js
@@ -4,6 +4,15 @@
 //
 // Flags: --allow-natives-syntax
 
-var ab = new ArrayBuffer(100);
-%ArrayBufferNeuter(ab);
-%ArrayBufferNeuter(ab);
+var global = "10.1";
+function f() { }
+function g(a) { this.d = a; }
+function h() {
+  var x = new f();
+  global.dummy = this;
+  var y = new g(x);
+}
+h();
+h();
+%OptimizeFunctionOnNextCall(h);
+h();