| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| #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) |
