Fix HObjectAccess for loads from migrating prototypes

BUG=chromium:305309
R=danno@chromium.org

Review URL: https://codereview.chromium.org/35173005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17345 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
parent 2208338b
......@@ -4759,6 +4759,9 @@ bool HOptimizedGraphBuilder::PropertyAccessInfo::LookupInPrototypes() {
Handle<Map> map = map_;
while (map->prototype()->IsJSObject()) {
holder_ = handle(JSObject::cast(map->prototype()));
if (holder_->map()->is_deprecated()) {
JSObject::TryMigrateInstance(holder_);
}
map = Handle<Map>(holder_->map());
if (!CanInlinePropertyAccess(*map)) {
lookup_.NotFound();
......
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// Flags: --allow-natives-syntax
function BadProto() {
this.constant_function = function() {};
this.one = 1;
this.two = 2;
}
var b1 = new BadProto();
var b2 = new BadProto();
function Ctor() {}
Ctor.prototype = b1;
var a = new Ctor();
function Two(x) {
return x.two;
}
assertEquals(2, Two(a));
assertEquals(2, Two(a));
b2.constant_function = "no longer constant!";
%OptimizeFunctionOnNextCall(Two);
assertEquals(2, Two(a));
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