Implement IC for storing to dictionary case objects....

test/mjsunit/store-dictionary.js

Index: test/mjsunit/store-dictionary.js
===================================================================
--- test/mjsunit/store-dictionary.js	(revision 0)
+++ test/mjsunit/store-dictionary.js	(revision 0)
@@ -0,0 +1,65 @@
+// 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.
+
+// Test dictionary store ICs.
+
+// Function that stores property 'x' on an object.
+function store(obj) { obj.x = 42; }
+
+// Create object and force it to dictionary mode by deleting property.
+var o = { x: 32, y: 33 };
+delete o.y;
+
+// Make the store ic in the 'store' function go into dictionary store
+// case.
+for (var i = 0; i < 3; i++) {
+  store(o);
+}
+assertEquals(42, o.x);
+
+// Test that READ_ONLY property attribute is respected. Make 'x'
+// READ_ONLY.
+Object.defineProperty(o, 'x', { value: 32, writable: false });
+
+// Attempt to store using the store ic in the 'store' function.
+store(o);
+
+// Check that the store did not change the value.
+assertEquals(32, o.x);
+
+// Check that bail-out code works.
+// Smi.
+store(1);
+// Fast case object.
+o = new Object();
+store(o);
+assertEquals(42, o.x);
+// Slow case object without x property.
+delete o.x;
+store(o);
+assertEquals(42, o.x);
+