| /** |
| * 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 "DFGFlowIndexing.h" |
| #include "DFGGraph.h" |
| #include "DFGNode.h" |
| |
| namespace JSC { namespace DFG { |
| |
| // This is a mapping from nodes to values that is useful for flow-sensitive analysis. In such an |
| // analysis, at every point in the program we need to consider the values of nodes plus the shadow |
| // values of Phis. This makes it easy to do both of those things. |
| template<typename T> |
| class FlowMap { |
| public: |
| FlowMap(Graph& graph) |
| : m_graph(graph) |
| { |
| resize(); |
| } |
| |
| // Call this if the number of nodes in the graph has changed. Note that this does not reset any |
| // entries. |
| void resize() |
| { |
| m_map.resize(m_graph.maxNodeCount()); |
| m_shadowMap.resize(m_graph.maxNodeCount()); |
| } |
| |
| Graph& graph() const { return m_graph; } |
| |
| T& at(unsigned nodeIndex) |
| { |
| return m_map[nodeIndex]; |
| } |
| |
| T& at(Node* node) |
| { |
| return at(node->index()); |
| } |
| |
| T& atShadow(unsigned nodeIndex) |
| { |
| return m_shadowMap[nodeIndex]; |
| } |
| |
| T& atShadow(Node* node) |
| { |
| return atShadow(node->index()); |
| } |
| |
| T& at(unsigned nodeIndex, NodeFlowProjection::Kind kind) |
| { |
| switch (kind) { |
| case NodeFlowProjection::Primary: |
| return at(nodeIndex); |
| case NodeFlowProjection::Shadow: |
| return atShadow(nodeIndex); |
| } |
| RELEASE_ASSERT_NOT_REACHED(); |
| return *bitwise_cast<T*>(nullptr); |
| } |
| |
| T& at(Node* node, NodeFlowProjection::Kind kind) |
| { |
| return at(node->index(), kind); |
| } |
| |
| T& at(NodeFlowProjection projection) |
| { |
| return at(projection.node(), projection.kind()); |
| } |
| |
| const T& at(unsigned nodeIndex) const { return const_cast<FlowMap*>(this)->at(nodeIndex); } |
| const T& at(Node* node) const { return const_cast<FlowMap*>(this)->at(node); } |
| const T& atShadow(unsigned nodeIndex) const { return const_cast<FlowMap*>(this)->atShadow(nodeIndex); } |
| const T& atShadow(Node* node) const { return const_cast<FlowMap*>(this)->atShadow(node); } |
| const T& at(unsigned nodeIndex, NodeFlowProjection::Kind kind) const { return const_cast<FlowMap*>(this)->at(nodeIndex, kind); } |
| const T& at(Node* node, NodeFlowProjection::Kind kind) const { return const_cast<FlowMap*>(this)->at(node, kind); } |
| const T& at(NodeFlowProjection projection) const { return const_cast<FlowMap*>(this)->at(projection); } |
| |
| private: |
| Graph& m_graph; |
| Vector<T, 0, UnsafeVectorOverflow> m_map; |
| Vector<T, 0, UnsafeVectorOverflow> m_shadowMap; |
| }; |
| |
| } } // namespace JSC::DFG |
| |
| namespace WTF { |
| |
| template<typename T> |
| void printInternal(PrintStream& out, const JSC::DFG::FlowMap<T>& map) |
| { |
| CommaPrinter comma; |
| for (unsigned i = 0; i < map.graph().maxNodeCount(); ++i) { |
| if (JSC::DFG::Node* node = map.graph().nodeAt(i)) { |
| if (const T& value = map.at(node)) |
| out.print(comma, node, "=>", value); |
| } |
| } |
| for (unsigned i = 0; i < map.graph().maxNodeCount(); ++i) { |
| if (JSC::DFG::Node* node = map.graph().nodeAt(i)) { |
| if (const T& value = map.atShadow(node)) |
| out.print(comma, "shadow(", node, ")=>", value); |
| } |
| } |
| } |
| |
| } // namespace WTF |
| |
| #endif // ENABLE(DFG_JIT) |
| |