| /* |
| * Copyright (C) 2011 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. ``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 |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(DFG_JIT) |
| |
| #include "SpeculatedType.h" |
| |
| namespace JSC { namespace DFG { |
| |
| class Graph; |
| |
| // Propagate predictions gathered at heap load sites by the value profiler, and |
| // from slow path executions, to generate a prediction for each node in the graph. |
| // This is a crucial phase of compilation, since before running this phase, we |
| // have no idea what types any node (or most variables) could possibly have, unless |
| // that node is either a heap load, a call, a GetLocal for an argument, or an |
| // arithmetic op that had definitely taken slow path. Most nodes (even most |
| // arithmetic nodes) do not qualify for any of these categories. But after running |
| // this phase, we'll have full information for the expected type of each node. |
| |
| bool performPredictionPropagation(Graph&); |
| |
| // Helper used for FixupPhase for computing the predicted type of a ToPrimitive. |
| SpeculatedType resultOfToPrimitive(SpeculatedType); |
| |
| } } // namespace JSC::DFG::Phase |
| |
| #endif // ENABLE(DFG_JIT) |
