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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Generic;
using ILCompiler.DependencyAnalysisFramework;
using Internal.Text;
using Internal.TypeSystem;
using Debug = System.Diagnostics.Debug;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// Represents references to canonical method bodies with the capability to make
/// the canonical reference concrete when given an instantiation context.
/// This node is used to represent references from canonical method bodies to other
/// canonical methods.
/// </summary>
internal class RuntimeDeterminedMethodNode : DependencyNodeCore<NodeFactory>, IMethodNode, INodeWithRuntimeDeterminedDependencies
{
private readonly IMethodNode _canonicalMethodNode;
public MethodDesc Method { get; }
// Implementation of ISymbolNode that makes this node act as a symbol for the canonical body
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
_canonicalMethodNode.AppendMangledName(nameMangler, sb);
}
public int Offset => _canonicalMethodNode.Offset;
public bool RepresentsIndirectionCell => _canonicalMethodNode.RepresentsIndirectionCell;
public RuntimeDeterminedMethodNode(MethodDesc method, IMethodNode canonicalMethod)
{
Debug.Assert(!method.IsSharedByGenericInstantiations);
Debug.Assert(method.IsRuntimeDeterminedExactMethod);
Method = method;
_canonicalMethodNode = canonicalMethod;
}
public override IEnumerable<DependencyListEntry> GetStaticDependencies(NodeFactory factory)
{
yield return new DependencyListEntry(_canonicalMethodNode, "Canonical body");
}
protected override string GetName(NodeFactory factory) => $"{Method.ToString()} backed by {_canonicalMethodNode.GetMangledName(factory.NameMangler)}";
public IEnumerable<DependencyListEntry> InstantiateDependencies(NodeFactory factory, Instantiation typeInstantiation, Instantiation methodInstantiation)
{
yield return new DependencyListEntry(
factory.ShadowConcreteMethod(Method.GetNonRuntimeDeterminedMethodFromRuntimeDeterminedMethodViaSubstitution(typeInstantiation, methodInstantiation)), "concrete method");
}
public override bool HasConditionalStaticDependencies => false;
public override bool HasDynamicDependencies => false;
public override bool InterestingForDynamicDependencyAnalysis => false;
public override bool StaticDependenciesAreComputed => true;
public override IEnumerable<CombinedDependencyListEntry> SearchDynamicDependencies(List<DependencyNodeCore<NodeFactory>> markedNodes, int firstNode, NodeFactory factory) => null;
public override IEnumerable<CombinedDependencyListEntry> GetConditionalStaticDependencies(NodeFactory factory) => null;
int ISortableNode.ClassCode => 258139501;
int ISortableNode.CompareToImpl(ISortableNode other, CompilerComparer comparer)
{
return comparer.Compare(_canonicalMethodNode, ((RuntimeDeterminedMethodNode)other)._canonicalMethodNode);
}
}
}
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