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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/. */
/* Susceptible to timeouts on some systems, see bug 1203595, if run
* with --ion-eager --ion-offthread-compile=off.
*
* Probably only meaningful to run this with default flags.
*/
/* This test is intended to test Ion code generation for the internal
* primitive TypeDescrIsArrayType(), available to self-hosted code.
*
* This test differs from the one in TypedObject-TypeDescrIsArrayType.js
* in that it tries to hide type information from the JIT. Sadly,
* it turns out to be hard to write a test that causes a run-time test
* to be inserted at the right spot. This is my best effort,
* but the test was still specialized as "true" in the generated code
* last I looked.
*
* To do that, it must trigger enough uses of that primitive as well
* as enough uses of a caller of the primitive to trigger inlining of
* the primitive into its compiled caller.
*
* It turns out that TypeDescrIsArrayType() is used early in the map()
* method on TypedObject arrays, so code that heavily uses the latter
* method will usually be good enough.
*
* In practice this test just asserts that map() works, and thus that
* the code for TypeDescrIsArrayType() is at least not completely
* broken.
*
* The test is only meaningful if inlining actually happens. Here is
* how to verify that (manually):
*
* Run this with IONFLAGS=logs, generate pdfs with iongraph, and then
* try running "pdfgrep TypeDescrIsArrayType func*pass00*.pdf", this
* might net a function that is a likely candidate for manual inspection.
*
* (It is sometimes useful to comment out the assert() macro in the
* self-hosted code.)
*/
if (!this.TypedObject) {
print("No TypedObject, skipping");
quit();
}
var T = TypedObject;
var AT = new T.ArrayType(T.int32, 100);
function check(v) {
return v.map(x => x+1);
}
function Array_build(n, f) {
var a = new Array(n);
for ( var i=0 ; i < n ; i++ )
a[i] = f(i);
return a;
}
function test() {
var w1 = AT.build(x => x+1);
var w2 = Array_build(100, x => x+1);
w2.map = w1.map;
var a = [ w1, w2 ];
for ( var i=0 ; i < 2000 ; i++ )
try { a[i%2] = check(a[i%2]); } catch (e) { assertEq( i%2, 1 ); }
return a[0];
}
var w = test();
assertEq(w.length, 100);
assertEq(w[99], 1100);
print("Done");
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