| /** |
| * 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) |
| |
| namespace JSC { namespace DFG { |
| |
| class Graph; |
| |
| // This phase ensures that we maintain liveness for locals |
| // that are live in the "catch" block. Because a "catch" |
| // block will not be in the control flow graph, we need to ensure |
| // anything live inside the "catch" block in bytecode will maintain |
| // liveness inside the "try" block for an OSR exit from the "try" |
| // block into the "catch" block in the case of an exception being thrown. |
| // |
| // The mechanism currently used to demonstrate liveness to OSR exit |
| // is ensuring all variables live in a "catch" are flushed to the |
| // stack inside the "try" block. |
| |
| bool performLiveCatchVariablePreservationPhase(Graph&); |
| |
| } } // namespace JSC::DFG |
| |
| #endif // ENABLE(DFG_JIT) |
