HHasInstanceType uses GVN but does not provide a comparison function...

test/mjsunit/regress/regress-995.js

Index: test/mjsunit/regress/regress-995.js
===================================================================
--- test/mjsunit/regress/regress-995.js	(revision 0)
+++ test/mjsunit/regress/regress-995.js	(revision 0)
@@ -0,0 +1,57 @@
+// Copyright 2010 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.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// 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.
+
+//
+// A number of hydrogen instructions did not correctly compare its
+// data during GVN.
+//
+// Flags: --allow-natives-syntax
+
+// HHasInstance.
+function f(value) {
+  if (%_IsSpecObject(value)) {
+    if ((%_IsArray(value))) assertTrue(false);
+  }
+}
+f(new String("bar"));
+
+// HClassOf.
+function g(value) {
+  if (%_ClassOf(value) === 'Date') {
+    if (%_ClassOf(value) === 'String') assertTrue(false);
+  }
+}
+g(new Date());
+
+// HIsNull.
+function h(value) {
+  if (value == null) {
+    if (value === null) assertTrue(false);
+  }
+}
+h(undefined);
+