blob: 92d1333bccabcb14c2447cb5870a20bfdd8bdd1a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/* -*- 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 never a type descriptor object,
* so ObjectIsTypeDescr resolves to false (and we have to catch
* 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 ST = new T.StructType({x:T.int32});
function check(v) {
return v.toSource();
}
function test() {
var fake = { toSource: ST.toSource };
var a = [ ST, fake ];
for ( var i=0 ; i < 1000 ; i++ )
try { check(a[i%2]); } catch (e) {}
try { return check(a[0]); } catch (e) { return "Thrown" }
}
print(test());
|
