private bool IsGeneratedEqualityContract(IProperty property)
{
// Generated member:
// protected virtual Type EqualityContract {
// [CompilerGenerated] get => typeof(R);
// }
Debug.Assert(property.Name == "EqualityContract");
if (property.Accessibility != Accessibility.Protected)
{
return(false);
}
if (!(property.IsVirtual || property.IsOverride))
{
return(false);
}
if (property.IsSealed)
{
return(false);
}
var getter = property.Getter;
if (!(getter != null && !property.CanSet))
{
return(false);
}
if (property.GetAttributes().Any())
{
return(false);
}
if (getter.GetReturnTypeAttributes().Any())
{
return(false);
}
var attrs = getter.GetAttributes().ToList();
if (attrs.Count != 1)
{
return(false);
}
if (!attrs[0].AttributeType.IsKnownType(KnownAttribute.CompilerGenerated))
{
return(false);
}
var body = DecompileBody(getter);
if (body == null || body.Instructions.Count != 1)
{
return(false);
}
if (!(body.Instructions.Single() is Leave leave))
{
return(false);
}
// leave IL_0000 (call GetTypeFromHandle(ldtypetoken R))
if (!TransformExpressionTrees.MatchGetTypeFromHandle(leave.Value, out IType ty))
{
return(false);
}
return(IsRecordType(ty));
}
bool ScanCallSiteInitBlock(Block callSiteInitBlock, IField callSiteCacheField, IType callSiteDelegateType, out CallSiteInfo callSiteInfo, out Block blockAfterInit)
{
callSiteInfo = default(CallSiteInfo);
blockAfterInit = null;
int instCount = callSiteInitBlock.Instructions.Count;
if (callSiteInitBlock.IncomingEdgeCount != 1 || instCount < 2)
{
return(false);
}
if (!callSiteInitBlock.Instructions[instCount - 1].MatchBranch(out blockAfterInit))
{
return(false);
}
if (!callSiteInitBlock.Instructions[instCount - 2].MatchStsFld(out var field, out var value) || !field.Equals(callSiteCacheField))
{
return(false);
}
if (!(value is Call createBinderCall) || createBinderCall.Method.TypeArguments.Count != 0 || createBinderCall.Arguments.Count != 1 || createBinderCall.Method.Name != "Create" || createBinderCall.Method.DeclaringType.FullName != CallSiteTypeName || createBinderCall.Method.DeclaringType.TypeArguments.Count != 1)
{
return(false);
}
if (!(createBinderCall.Arguments[0] is Call binderCall) || binderCall.Method.DeclaringType.FullName != CSharpBinderTypeName || binderCall.Method.DeclaringType.TypeParameterCount != 0)
{
return(false);
}
callSiteInfo.DelegateType = callSiteDelegateType;
callSiteInfo.InitBlock = callSiteInitBlock;
switch (binderCall.Method.Name)
{
case "IsEvent":
callSiteInfo.Kind = BinderMethodKind.IsEvent;
// In the case of Binder.IsEvent all arguments should already be properly inlined, as there is no array initializer:
// Scan arguments: binder flags, member name, context type
if (binderCall.Arguments.Count != 3)
{
return(false);
}
if (!binderCall.Arguments[0].MatchLdcI4(out int binderFlagsInteger))
{
return(false);
}
callSiteInfo.Flags = (CSharpBinderFlags)binderFlagsInteger;
if (!binderCall.Arguments[1].MatchLdStr(out string name))
{
return(false);
}
callSiteInfo.MemberName = name;
if (!TransformExpressionTrees.MatchGetTypeFromHandle(binderCall.Arguments[2], out var contextType))
{
return(false);
}
callSiteInfo.Context = contextType;
return(true);
case "Convert":
callSiteInfo.Kind = BinderMethodKind.Convert;
// In the case of Binder.Convert all arguments should already be properly inlined, as there is no array initializer:
// Scan arguments: binder flags, target type, context type
if (binderCall.Arguments.Count != 3)
{
return(false);
}
if (!binderCall.Arguments[0].MatchLdcI4(out binderFlagsInteger))
{
return(false);
}
callSiteInfo.Flags = (CSharpBinderFlags)binderFlagsInteger;
if (!TransformExpressionTrees.MatchGetTypeFromHandle(binderCall.Arguments[1], out var targetType))
{
return(false);
}
callSiteInfo.ConvertTargetType = targetType;
if (!TransformExpressionTrees.MatchGetTypeFromHandle(binderCall.Arguments[2], out contextType))
{
return(false);
}
callSiteInfo.Context = contextType;
return(true);
case "InvokeMember":
callSiteInfo.Kind = BinderMethodKind.InvokeMember;
if (binderCall.Arguments.Count != 5)
{
return(false);
}
// First argument: binder flags
// The value must be a single ldc.i4 instruction.
if (!binderCall.Arguments[0].MatchLdLoc(out var variable))
{
return(false);
}
if (!callSiteInitBlock.Instructions[0].MatchStLoc(variable, out value))
{
return(false);
}
if (!value.MatchLdcI4(out binderFlagsInteger))
{
return(false);
}
callSiteInfo.Flags = (CSharpBinderFlags)binderFlagsInteger;
// Second argument: method name
// The value must be a single ldstr instruction.
if (!binderCall.Arguments[1].MatchLdLoc(out variable))
{
return(false);
}
if (!callSiteInitBlock.Instructions[1].MatchStLoc(variable, out value))
{
return(false);
}
if (!value.MatchLdStr(out name))
{
return(false);
}
callSiteInfo.MemberName = name;
// Third argument: type arguments
// The value must be either ldnull (no type arguments) or an array initializer pattern.
if (!binderCall.Arguments[2].MatchLdLoc(out variable))
{
return(false);
}
if (!callSiteInitBlock.Instructions[2].MatchStLoc(out var variableOrTemporary, out value))
{
return(false);
}
int numberOfTypeArguments = 0;
if (!value.MatchLdNull())
{
if (value is NewArr typeArgsNewArr && typeArgsNewArr.Type.IsKnownType(KnownTypeCode.Type) && typeArgsNewArr.Indices.Count == 1 && typeArgsNewArr.Indices[0].MatchLdcI4(out numberOfTypeArguments))
{
if (!TransformArrayInitializers.HandleSimpleArrayInitializer(context.Function, callSiteInitBlock, 3, variableOrTemporary, typeArgsNewArr.Type, new[] { numberOfTypeArguments }, out var typeArguments, out _))
{
return(false);
}
int i = 0;
callSiteInfo.TypeArguments = new IType[numberOfTypeArguments];
foreach (var(_, typeArg) in typeArguments)
{
if (!TransformExpressionTrees.MatchGetTypeFromHandle(typeArg, out var type))
{
return(false);
}
callSiteInfo.TypeArguments[i] = type;
i++;
}
}
else
{
return(false);
}
}
int typeArgumentsOffset = numberOfTypeArguments;
// Special case for csc array initializers:
if (variableOrTemporary != variable)
{
// store temporary from array initializer in variable
if (!callSiteInitBlock.Instructions[3 + typeArgumentsOffset].MatchStLoc(variable, out value))
{
return(false);
}
if (!value.MatchLdLoc(variableOrTemporary))
{
return(false);
}
typeArgumentsOffset++;
}
// Fourth argument: context type
if (!binderCall.Arguments[3].MatchLdLoc(out variable))
{
return(false);
}
if (!callSiteInitBlock.Instructions[3 + typeArgumentsOffset].MatchStLoc(variable, out value))
{
return(false);
}
if (!TransformExpressionTrees.MatchGetTypeFromHandle(value, out contextType))
{
return(false);
}
callSiteInfo.Context = contextType;
// Fifth argument: call parameter info
if (!binderCall.Arguments[4].MatchLdLoc(out variable))
{
return(false);
}
if (!callSiteInitBlock.Instructions[4 + typeArgumentsOffset].MatchStLoc(variable, out value))
{
return(false);
}
if (!ExtractArgumentInfo(value, ref callSiteInfo, 5 + typeArgumentsOffset, variable))
{
return(false);
}
return(true);
ILInstruction MakeDynamicInstruction(CallSiteInfo callsite, CallVirt targetInvokeCall, List <ILInstruction> deadArguments)
{
switch (callsite.Kind)
{
case BinderMethodKind.BinaryOperation:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicBinaryOperatorInstruction(
binderFlags: callsite.Flags,
operation: callsite.Operation,
context: callsite.Context,
leftArgumentInfo: callsite.ArgumentInfos[0],
left: targetInvokeCall.Arguments[2],
rightArgumentInfo: callsite.ArgumentInfos[1],
right: targetInvokeCall.Arguments[3]
));
case BinderMethodKind.Convert:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
ILInstruction result = new DynamicConvertInstruction(
binderFlags: callsite.Flags,
context: callsite.Context,
type: callsite.ConvertTargetType,
argument: targetInvokeCall.Arguments[2]
);
if (result.ResultType == StackType.Unknown)
{
// if references are missing, we need to coerce the primitive type to None.
// Otherwise we will get loads of assertions.
result = new Conv(result, PrimitiveType.None, ((DynamicConvertInstruction)result).IsChecked, Sign.None);
}
return(result);
case BinderMethodKind.GetIndex:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicGetIndexInstruction(
binderFlags: callsite.Flags,
context: callsite.Context,
argumentInfo: callsite.ArgumentInfos,
arguments: targetInvokeCall.Arguments.Skip(2).ToArray()
));
case BinderMethodKind.GetMember:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicGetMemberInstruction(
binderFlags: callsite.Flags,
name: callsite.MemberName,
context: callsite.Context,
targetArgumentInfo: callsite.ArgumentInfos[0],
target: targetInvokeCall.Arguments[2]
));
case BinderMethodKind.Invoke:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicInvokeInstruction(
binderFlags: callsite.Flags,
context: callsite.Context,
argumentInfo: callsite.ArgumentInfos,
arguments: targetInvokeCall.Arguments.Skip(2).ToArray()
));
case BinderMethodKind.InvokeConstructor:
var arguments = targetInvokeCall.Arguments.Skip(2).ToArray();
// Extract type information from targetInvokeCall:
// Must either be an inlined type or
// a reference to a variable that is initialized with a type.
if (!TransformExpressionTrees.MatchGetTypeFromHandle(arguments[0], out var type))
{
if (!(arguments[0].MatchLdLoc(out var temp) && temp.IsSingleDefinition && temp.StoreInstructions.FirstOrDefault() is StLoc initStore))
{
return(null);
}
if (!TransformExpressionTrees.MatchGetTypeFromHandle(initStore.Value, out type))
{
return(null);
}
}
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicInvokeConstructorInstruction(
binderFlags: callsite.Flags,
type: type ?? SpecialType.UnknownType,
context: callsite.Context,
argumentInfo: callsite.ArgumentInfos,
arguments: arguments
));
case BinderMethodKind.InvokeMember:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicInvokeMemberInstruction(
binderFlags: callsite.Flags,
name: callsite.MemberName,
typeArguments: callsite.TypeArguments,
context: callsite.Context,
argumentInfo: callsite.ArgumentInfos,
arguments: targetInvokeCall.Arguments.Skip(2).ToArray()
));
case BinderMethodKind.IsEvent:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicIsEventInstruction(
binderFlags: callsite.Flags,
name: callsite.MemberName,
context: callsite.Context,
argument: targetInvokeCall.Arguments[2]
));
case BinderMethodKind.SetIndex:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicSetIndexInstruction(
binderFlags: callsite.Flags,
context: callsite.Context,
argumentInfo: callsite.ArgumentInfos,
arguments: targetInvokeCall.Arguments.Skip(2).ToArray()
));
case BinderMethodKind.SetMember:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicSetMemberInstruction(
binderFlags: callsite.Flags,
name: callsite.MemberName,
context: callsite.Context,
targetArgumentInfo: callsite.ArgumentInfos[0],
target: targetInvokeCall.Arguments[2],
valueArgumentInfo: callsite.ArgumentInfos[1],
value: targetInvokeCall.Arguments[3]
));
case BinderMethodKind.UnaryOperation:
deadArguments.AddRange(targetInvokeCall.Arguments.Take(2));
return(new DynamicUnaryOperatorInstruction(
binderFlags: callsite.Flags,
operation: callsite.Operation,
context: callsite.Context,
operandArgumentInfo: callsite.ArgumentInfos[0],
operand: targetInvokeCall.Arguments[2]
));
default:
throw new ArgumentOutOfRangeException($"Value {callsite.Kind} is not supported!");
}
}