length = AddInstruction(new(zone()) HJSArrayLength(object));
checked_key = AddInstruction(new(zone()) HBoundsCheck(key, length));
AddInstruction(elements);
+ if (is_store) {
+ AddInstruction(new(zone()) HCheckMap(
+ elements, isolate()->factory()->fixed_array_map()));
+ }
} else {
AddInstruction(elements);
+ if (is_store) {
+ AddInstruction(new(zone()) HCheckMap(
+ elements, isolate()->factory()->fixed_array_map()));
+ }
length = AddInstruction(new(zone()) HFixedArrayLength(elements));
checked_key = AddInstruction(new(zone()) HBoundsCheck(key, length));
}
elements = AddInstruction(new(zone()) HLoadElements(object));
elements->ClearFlag(HValue::kUseGVN);
if (is_store) {
+ AddInstruction(new(zone()) HCheckMap(
+ elements, isolate()->factory()->fixed_array_map()));
access = AddInstruction(
new(zone()) HStoreKeyedFastElement(elements, checked_key, val));
} else {
set_current_block(if_fastobject);
elements = AddInstruction(new(zone()) HLoadElements(object));
elements->ClearFlag(HValue::kUseGVN);
+ if (is_store) {
+ AddInstruction(new(zone()) HCheckMap(
+ elements, isolate()->factory()->fixed_array_map()));
+ }
length = AddInstruction(new(zone()) HFixedArrayLength(elements));
checked_key = AddInstruction(new(zone()) HBoundsCheck(key, length));
if (is_store) {
--- /dev/null
+// Copyright 2011 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 --expose-gc
+
+function mkCOWArray() {
+ var a = [''];
+ assertEquals('', a[0]);
+ return a;
+}
+
+function mkArray() {
+ var a = [];
+ a[0] = '';
+ return a;
+}
+
+function mkNumberDictionary() {
+ var a = new Array();
+ a[0] = '';
+ a[100000] = '';
+ return a;
+}
+
+function write(a, i) { a[i] = "bazinga!"; }
+
+function test(factories, w) {
+ factories.forEach(function(f) { w(f(), 0); });
+ factories.forEach(function(f) { w(f(), 0); });
+ %OptimizeFunctionOnNextCall(w);
+ factories.forEach(function(f) { w(f(), 0); });
+}
+
+// Monomorphic case.
+for (var i = 0; i < 5; i++) write(mkArray(), 0);
+%OptimizeFunctionOnNextCall(write);
+write(mkCOWArray(), 0);
+var failure = mkCOWArray();
+
+// Cleanup, then polymorphic case.
+%DeoptimizeFunction(write);
+gc();
+test([mkArray, mkNumberDictionary], write);
+test([mkArray, mkNumberDictionary, mkCOWArray], write);