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https://github.com/darlinghq/darling-JavaScriptCore.git
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53 lines
2.3 KiB
C++
53 lines
2.3 KiB
C++
/*
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* Copyright (C) 2011 Apple Inc. All rights reserved.
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*
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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
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* are met:
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* 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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*/
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#pragma once
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#if ENABLE(DFG_JIT)
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#include "SpeculatedType.h"
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namespace JSC { namespace DFG {
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class Graph;
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// Propagate predictions gathered at heap load sites by the value profiler, and
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// from slow path executions, to generate a prediction for each node in the graph.
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// This is a crucial phase of compilation, since before running this phase, we
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// have no idea what types any node (or most variables) could possibly have, unless
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// that node is either a heap load, a call, a GetLocal for an argument, or an
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// arithmetic op that had definitely taken slow path. Most nodes (even most
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// arithmetic nodes) do not qualify for any of these categories. But after running
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// this phase, we'll have full information for the expected type of each node.
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bool performPredictionPropagation(Graph&);
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// Helper used for FixupPhase for computing the predicted type of a ToPrimitive.
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SpeculatedType resultOfToPrimitive(SpeculatedType);
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} } // namespace JSC::DFG::Phase
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#endif // ENABLE(DFG_JIT)
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