Let ComputeTarget fail if it skips over NORMAL objects.

test/mjsunit/regress/regress-2595.js

 // Copyright 2013 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
 
-var bytes = new Uint8Array([
-    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f]);  // kHoleNaN
-var doubles = new Float64Array(bytes.buffer);
-assertTrue(isNaN(doubles[0]));
+var p = { f: function () { return "p"; } };
+var o = Object.create(p);
+o.x = true;
+delete o.x;  // slow case object
 
-var prototype = [2.5, 2.5];
-var array = [3.5, 3.5];
-array.__proto__ = prototype;
-assertTrue(%HasFastDoubleElements(array));
+var u = { x: 0, f: function () { return "u"; } };  // object with some other map
 
-function boom(index) {
-  array[index] = doubles[0];
-  return array[index];
+function F(x) {
+  return x.f();
 }
 
-assertTrue(isNaN(boom(0)));
-assertTrue(isNaN(boom(0)));
-assertTrue(isNaN(boom(0)));
+// First make CALL IC in F go MEGAMORPHIC and ensure that we put the stub
+// that calls p.f (guarded by a negative dictionary lookup on the reciever)
+// into the stub cache
+assertEquals("p", F(o));
+assertEquals("p", F(o));
+assertEquals("u", F(u));
+assertEquals("p", F(o));
+assertEquals("u", F(u));
 
-// Test hydrogen
-%OptimizeFunctionOnNextCall(boom);
-assertTrue(isNaN(boom(0)));
-assertTrue(isNaN(boom(0)));
-assertTrue(isNaN(boom(0)));
+// Optimize F. We will inline p.f into F guarded by map checked against
+// receiver which does not work for slow case objects.
+%OptimizeFunctionOnNextCall(F);
+assertEquals("p", F(o));
 
-
-
+// Add f to o. o's map will *not* change.
+o.f = function () { return "o"; };
+assertEquals("o", F(o));