v8/test/mjsunit/regress/regress-1166.js
kmillikin@chromium.org 82cdd48b2f Fix a bug in deoptimization after logical expressions in an effect context.
When deoptimizing to after an expression of the form (expr0 || expr1)
or (expr0 && expr1) in an effect context, the unoptimized code could
incorrectly see the value of the expression.

Handle the short-circuit binary operators specially in effect contexts.
This fixes the issue and will generate better code when the left
subexpression is boolean-valued.

BUG=v8:1166

Review URL: http://codereview.chromium.org/6519046

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6831 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2011-02-17 11:06:50 +00:00

36 lines
1.8 KiB
JavaScript

// Copyright 2011 the V8 project authors. All rights reserved.
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//
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// Deoptimization after a short-circuit logical operation in an effect
// context should not see the value of the expression.
function observe(x, y) { return x; }
function test(x) { return observe(1, ((false || false), x + 1)); }
for (var i = 0; i < 10000000; ++i) test(0);
test("a");