v8/test/mjsunit/asm/float32array-outofbounds.js
bmeurer@chromium.org 9b306893a3 [turbofan] Properly emit bounds checks for typed array element loads.
Also fix an awfull bug in simplified lowering.

TEST=cctest,mjsunit/asm
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/640603003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24463 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-08 11:16:45 +00:00

31 lines
705 B
JavaScript

// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
function Module(stdlib, foreign, heap) {
"use asm";
var MEM32 = new stdlib.Float32Array(heap);
function load(i) {
i = i|0;
i = +MEM32[i >> 2];
return i;
}
function store(i, v) {
i = i|0;
v = +v;
MEM32[i >> 2] = v;
}
return { load: load, store: store };
}
var m = Module(this, {}, new ArrayBuffer(4));
m.store(0, 42.0);
for (var i = 1; i < 64; ++i) {
m.store(i * 4 * 32 * 1024, i);
}
assertEquals(42.0, m.load(0));
for (var i = 1; i < 64; ++i) {
assertEquals(NaN, m.load(i * 4 * 32 * 1024));
}