--- /dev/null
+// 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.
+
+// Flags: --allow-natives-syntax --check-elimination
+
+function A(x, y) {
+ this.x = x;
+ this.y = y;
+}
+
+function B(x, y) {
+ this.x = x;
+ this.y = y;
+}
+
+function F1(a, b) {
+ if (a == b) return a.x;
+ else return b.x;
+}
+
+function F2(a, b) {
+ if (a == b) return a.x;
+ else return b.x;
+}
+
+function F3(a, b) {
+ var f = a.y;
+ if (a == b) return a.x;
+ else return b.x;
+}
+
+function F4(a, b) {
+ var f = b.y;
+ if (a == b) return a.x;
+ else return b.x;
+}
+
+%NeverOptimizeFunction(test);
+
+function test(f, a, b) {
+ f(a, a);
+ f(a, b);
+ f(b, a);
+ f(b, c);
+ f(b, b);
+ f(c, c);
+
+ %OptimizeFunctionOnNextCall(f)
+
+ assertEquals(a.x, f(a, a));
+ assertEquals(b.x, f(b, b));
+}
+
+var a = new A(3, 5);
+var b = new B(2, 6);
+var c = new A(1, 7);
+
+test(F1, a, c);
+test(F2, a, b);
+test(F3, a, b);
+test(F4, a, b);