v8/test/mjsunit/regress/regress-606021.js
Ross McIlroy 994db73210 [cleanup] Add missing %PrepareFunctionForOptimize in mjsunit tests
Bug: v8:8801,v8:8394,v8:9183
Change-Id: I55027b3ba0c78f40d82aaf2d160aaf957d02cab5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1662292
Auto-Submit: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62214}
2019-06-17 13:14:51 +00:00

34 lines
813 B
JavaScript

// Copyright 2016 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.
// Flags: --allow-natives-syntax
function foo() {
return function(c) {
var double_var = [3.0, 3.5][0];
var literal = c ? [1, double_var] : [double_var, 3.5];
return literal[0];
};
}
var f1 = foo();
var f2 = foo();
%PrepareFunctionForOptimization(f1);
// Both closures point to full code.
f1(false);
f2(false);
// Optimize f1, but don't initialize the [1, double_var] literal.
%OptimizeFunctionOnNextCall(f1);
f1(false);
// Initialize the [1, double_var] literal, and transition the boilerplate to
// double.
f2(true);
// Trick crankshaft into writing double_var at the wrong position.
var l = f1(true);
assertEquals(1, l);