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https://github.com/JakeHillion/object-introspection.git
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688d483c0c
We previously moved container identification later in CodeGen in order to preserve information for AlignmentCalc. However, Flattener needs to know if a class is a container in order to apply its special handling for this case. This new approach moves container identification in front of Flattener, but has Container own a type node, representing its layout. This underlying type node can be used for calculating a container's alignment in a later pass.
61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Prune.h"
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#include "TypeGraph.h"
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#include "TypeIdentifier.h"
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namespace oi::detail::type_graph {
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Pass Prune::createPass() {
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auto fn = [](TypeGraph& typeGraph, NodeTracker& tracker) {
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Prune pass{tracker};
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for (auto& type : typeGraph.rootTypes()) {
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pass.accept(type);
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}
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};
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return Pass("Prune", fn);
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}
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void Prune::accept(Type& type) {
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if (tracker_.visit(type))
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return;
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type.accept(*this);
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}
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void Prune::visit(Class& c) {
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RecursiveVisitor::visit(c);
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c.templateParams.clear();
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c.parents.clear();
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c.functions.clear();
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// Should we bother with this shrinking? It saves memory but costs CPU
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c.templateParams.shrink_to_fit();
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c.parents.shrink_to_fit();
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c.functions.shrink_to_fit();
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}
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void Prune::visit(Container& c) {
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RecursiveVisitor::visit(c);
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c.setUnderlying(nullptr);
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}
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} // namespace oi::detail::type_graph
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