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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.IL;
using Internal.Text;
using Internal.TypeSystem;
using Debug = System.Diagnostics.Debug;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// NEWOBJ operation on String type is actually a call to a static method that returns a String
/// instance (i.e. there's an explicit call to the runtime allocator from the static method body).
/// This node is used to model the behavior. It represents the symbol for the target allocator
/// method and makes sure the String type is marked as constructed.
/// </summary>
class StringAllocatorMethodNode : DependencyNodeCore<NodeFactory>, IMethodNode
{
private readonly MethodDesc _allocationMethod;
private readonly MethodDesc _constructorMethod;
public MethodDesc Method => _allocationMethod;
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(nameMangler.GetMangledMethodName(_allocationMethod));
}
public int Offset => 0;
public bool RepresentsIndirectionCell => false;
public StringAllocatorMethodNode(MethodDesc constructorMethod)
{
Debug.Assert(constructorMethod.IsConstructor && constructorMethod.OwningType.IsString);
// Find the allocator method that matches the constructor signature.
var signatureBuilder = new MethodSignatureBuilder(constructorMethod.Signature);
signatureBuilder.Flags = MethodSignatureFlags.Static;
signatureBuilder.ReturnType = constructorMethod.OwningType;
_allocationMethod = constructorMethod.OwningType.GetKnownMethod("Ctor", signatureBuilder.ToSignature());
_constructorMethod = constructorMethod;
}
public override IEnumerable<DependencyListEntry> GetStaticDependencies(NodeFactory factory)
{
DependencyList result = new DependencyList();
result.Add(
factory.ConstructedTypeSymbol(factory.TypeSystemContext.GetWellKnownType(WellKnownType.String)),
"String constructor call");
result.Add(
factory.MethodEntrypoint(_allocationMethod),
"String constructor call");
factory.MetadataManager.GetDependenciesDueToReflectability(ref result, factory, _constructorMethod);
return result;
}
public override bool HasConditionalStaticDependencies => false;
public override bool HasDynamicDependencies => false;
public override bool InterestingForDynamicDependencyAnalysis => false;
public override bool StaticDependenciesAreComputed => true;
public override IEnumerable<CombinedDependencyListEntry> GetConditionalStaticDependencies(NodeFactory factory) => null;
public override IEnumerable<CombinedDependencyListEntry> SearchDynamicDependencies(List<DependencyNodeCore<NodeFactory>> markedNodes, int firstNode, NodeFactory context) => null;
protected override string GetName(NodeFactory factory) => this.GetMangledName(factory.NameMangler);
int ISortableNode.ClassCode => 1991750873;
int ISortableNode.CompareToImpl(ISortableNode other, CompilerComparer comparer)
{
return comparer.Compare(_allocationMethod, ((StringAllocatorMethodNode)other)._allocationMethod);
}
}
}
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