src/third_party/mozjs-45/js/src/jit-test/tests/ion/inlining/TypedObject-ObjectIsTypeDescr-multi.js

/* -*- 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 ObjectIsTypeDescr tests
 * internal to Type.toSource().
 *
 * In this case the argument type is always a type descriptor object
 * (though not a unique one), so ObjectIsTypeDescr resolves to true
 * and there should be no exceptions.
 *
 * 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 ObjectIsTypeDescr far
 * down in the graph for pass00, with a call to DescrToSource in a
 * subsequent block (all of this is at the mercy of the way the code
 * is currently written).
 */

if (!this.TypedObject)
  quit();

var T = TypedObject;
var ST1 = new T.StructType({x:T.int32});
var ST2 = new T.StructType({x:T.float64});

function check(v) {
    return v.toSource();
}

function test() {
  var a = [ ST1, ST2 ];
    for ( var i=0 ; i < 1000 ; i++ )
	check(a[i%2]);
    return check(a[0]);
}

print(test());