mirror of
https://github.com/RGBCube/serenity
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45 lines
1 KiB
C++
45 lines
1 KiB
C++
/*
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* Copyright (c) 2023, Dan Klishch <danilklishch@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Compiler/EnableGraphPointers.h"
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#include "Compiler/GenericASTPass.h"
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#include "Compiler/StronglyConnectedComponents.h"
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namespace JSSpecCompiler {
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class DeadCodeEliminationPass
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: public IntraproceduralCompilerPass
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, private RecursiveASTVisitor
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, private EnableGraphPointers<DeadCodeEliminationPass, SSAVariableDeclarationRef> {
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public:
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inline static constexpr StringView name = "dce"sv;
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using IntraproceduralCompilerPass::IntraproceduralCompilerPass;
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protected:
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void process_function() override;
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private:
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friend EnableGraphPointers;
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static Vertex as_vertex(Variable* variable);
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RecursionDecision on_entry(Tree tree) override;
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void on_leave(Tree tree) override;
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void remove_unused_phi_nodes();
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struct NodeData {
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Vector<Vertex> outgoing_edges;
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Vector<Vertex> incoming_edges;
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bool is_referenced = false;
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};
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Vector<NodeData> m_nodes;
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};
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}
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