3b473d7aad
Deopt support is added on two levels. On the IR level, a new ObjectState node is added, which represenents an object to be materialized. ObjectState nodes appear as inputs of FrameState and StateValues nodes. On the instruction select/code-generation level, the FrameStateDescriptor class handles the nesting introduced by ObjectState, and ensures that deopt code with CAPTURED_OBJECT/DUPLICATED_OBJECT entries are generated similarly to what crankshaft's escape analysis does. Two unittests test correctness of the IR level implementation. Correctness for instruction selection / code generation is tested by mjsunit tests. R=jarin@chromium.org,mstarzinger@chromium.org BUG=v8:4586 LOG=n Review URL: https://codereview.chromium.org/1485183002 Cr-Commit-Position: refs/heads/master@{#33115}
58 lines
2.2 KiB
JavaScript
58 lines
2.2 KiB
JavaScript
// Copyright 2013 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 --turbo-escape
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// Test deoptimization with captured objects in local variables.
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(function testDeoptLocal() {
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"use strict";
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function constructor1() {
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this.x=1;
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this.y=2;
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this.z=3;
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}
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function constructor2(x) {
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this.a=x;
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this.b=4;
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}
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function func() {
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var o1 = new constructor1();
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var o2 = new constructor2(o1);
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o1.x = o1;
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%DeoptimizeNow();
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assertEquals(o1, o1.x);
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assertEquals(2, o1.y);
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assertEquals(3, o1.z);
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assertEquals(o1, o2.a);
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assertEquals(4, o2.b);
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}
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func();
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func();
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%OptimizeFunctionOnNextCall(func);
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func();
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})();
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