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/* -*- tab-width: 8; indent-tabs-mode: nil; js-indent-level: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* Used to verify that the JIT resolves the ObjectIsTypedObject tests
* used in the TO.objectType() method, among other places.
*
* In this case the argument type is sometimes a TypedObject,
* sometimes not, so ObjectIsTypedObject must be a run-time check and
* sometimes it resolves to "false" and takes a more expensive path.
* There should be no exceptions: the operation is defined also on
* non-TypedObjects.
*
* Load this into the js shell with IONFLAGS=logs, then exit and run
* iongraph. You're looking for a smallish function within the
* "self-hosted" domain. Look for a call to ObjectIsTypedObject far
* down in the graph for pass00, with a subgraph before it that looks
* like it's comparing something to a string and to null (this is the
* inlining of IsObject). (All of this is at the mercy of the way the
* code is currently written.)
*/
if (!this.TypedObject) {
print("No TypedObject, skipping");
quit();
}
var T = TypedObject;
var ST1 = new T.StructType({x:T.int32});
var v1 = new ST1({x:10});
function check(v) {
return T.objectType(v);
}
function test() {
var v2 = { tag: "Hello, world!" };
var a = [ v1, v2 ];
for ( var i=0 ; i < 1000 ; i++ )
assertEq(check(a[i%2]), (i%2) == 0 ? ST1 : T.Object);
return check(a[i%2]);
}
print("Done");
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