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Diffstat (limited to 'deps/v8/test/webkit/dfg-cse-cfa-discrepancy.js')
| -rw-r--r-- | deps/v8/test/webkit/dfg-cse-cfa-discrepancy.js | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/deps/v8/test/webkit/dfg-cse-cfa-discrepancy.js b/deps/v8/test/webkit/dfg-cse-cfa-discrepancy.js new file mode 100644 index 0000000000..a40e7e6931 --- /dev/null +++ b/deps/v8/test/webkit/dfg-cse-cfa-discrepancy.js @@ -0,0 +1,54 @@ +// Copyright 2013 the V8 project authors. All rights reserved. +// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions +// are met: +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the distribution. +// +// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY +// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY +// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +description( +"Tests stability when the CFA finds a constant in block-local data flow over captured variables but the CSE doesn't because of differences in heap modeling." +); + +function foo(a, b) { + var x = a + b; + var y = a - b; + function bar() { + var m = x + y; + var n = x - y; + function baz() { + return m + n; + } + m = 23; + if (m < n) { + m = 12; + y = 72; // PutScopedVar appears to clobber world in CSE but only clobbers structures in CFA. + return m + 6 + n + baz(); + } else + return 91; + } + x = 42; + if (y < 0) { + return x + 5 + y + bar(); + } else + return 73; +} + +for (var i = 0; i < 200; ++i) + shouldBe("foo(i, i + 1)", "162"); + |