protected internal override void VisitNewObj(NewObj inst)
{
if (TransformDecimalCtorToConstant(inst, out LdcDecimal decimalConstant))
{
context.Step("TransformDecimalCtorToConstant", inst);
inst.ReplaceWith(decimalConstant);
return;
}
Block block;
if (TransformSpanTCtorContainingStackAlloc(inst, out ILInstruction locallocSpan))
{
inst.ReplaceWith(locallocSpan);
block = null;
ILInstruction stmt = locallocSpan;
while (stmt.Parent != null)
{
if (stmt.Parent is Block b)
{
block = b;
break;
}
stmt = stmt.Parent;
}
//ILInlining.InlineIfPossible(block, stmt.ChildIndex - 1, context);
return;
}
if (TransformArrayInitializers.TransformSpanTArrayInitialization(inst, context, out block))
{
context.Step("TransformSpanTArrayInitialization: single-dim", inst);
inst.ReplaceWith(block);
return;
}
base.VisitNewObj(inst);
}
protected internal override void VisitNewObj(NewObj inst)
{
if (TransformDecimalCtorToConstant(inst, out LdcDecimal decimalConstant))
{
context.Step("TransformDecimalCtorToConstant", inst);
inst.ReplaceWith(decimalConstant);
return;
}
Block block;
if (TransformSpanTCtorContainingStackAlloc(inst, out ILInstruction locallocSpan))
{
context.Step("new Span<T>(stackalloc) -> stackalloc Span<T>", inst);
inst.ReplaceWith(locallocSpan);
block = null;
ILInstruction stmt = locallocSpan;
while (stmt.Parent != null)
{
if (stmt.Parent is Block b)
{
block = b;
break;
}
stmt = stmt.Parent;
}
// Special case to eliminate extra store
if (stmt.GetNextSibling() is StLoc storeStmt && storeStmt.Value is LdLoc)
{
ILInlining.InlineIfPossible(block, stmt.ChildIndex, context);
}
return;
}
if (TransformArrayInitializers.TransformSpanTArrayInitialization(inst, context, out block))
{
context.Step("TransformSpanTArrayInitialization: single-dim", inst);
inst.ReplaceWith(block);
return;
}
if (TransformDelegateCtorLdVirtFtnToLdVirtDelegate(inst, out LdVirtDelegate ldVirtDelegate))
{
context.Step("new Delegate(target, ldvirtftn Method) -> ldvirtdelegate Delegate Method(target)", inst);
inst.ReplaceWith(ldVirtDelegate);
return;
}
base.VisitNewObj(inst);
}
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);