6a81642f31
The Advance() function of the class responsible for iterating environment uses didn't always advance as far as it could (relying on the HasNext predicate to finish advancing). This is brittle. The HasNext predicate also didn't advance as far as it could when it was at the end of an environment level. This is a bug. R=jkummerow@chromium.org BUG= TEST= Review URL: http://codereview.chromium.org/6993023 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8181 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
66 lines
2.3 KiB
JavaScript
66 lines
2.3 KiB
JavaScript
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax
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// Test that the Lithium environment iterator does stop iteration early.
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"use strict";
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function f0() {
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return f1('literal', true);
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}
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function f1(x, y) {
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return f2(x, y);
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}
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// Because it's strict, f2 has an environment containing only the constants
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// undefined, 'literal', and false. Bug 1423 would cause environment
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// iteration to stop early.
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//
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// Bug manifests as UNREACHABLE code (due to an unallocated register) in
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// debug builds.
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function f2(x, y) {
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if (y) {
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if (f3(x, 'other-literal')) {
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return 0;
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} else {
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return 1;
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}
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} else {
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return 2;
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}
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}
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function f3(x, y) {
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return x === y;
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}
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for (var i = 0; i < 5; ++i) f0();
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%OptimizeFunctionOnNextCall(f0);
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assertEquals(1, f0());
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