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[NativeAOT][8.0] Make casting logic closer to CoreCLR #90234

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merged 5 commits into from
Aug 9, 2023
Merged

[NativeAOT][8.0] Make casting logic closer to CoreCLR #90234

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957ac35
Refactored AssignmentVariation
VSadov Jul 26, 2023
7cdbbaa
refactored similar to coreclr
VSadov Jul 27, 2023
48ed2b1
fix build
VSadov Jul 27, 2023
6714387
simpler selection of runtime helpers for casts
VSadov Aug 6, 2023
3f40da7
add a codegen test
VSadov Aug 7, 2023
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2 changes: 2 additions & 0 deletions src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/CastHelpers.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -333,6 +333,8 @@ internal static unsafe class CastHelpers
return ChkCastClassSpecial(toTypeHnd, obj);
}

// Optimized helper for classes. Assumes that the trivial cases
// has been taken care of by the inlined check
[DebuggerHidden]
[StackTraceHidden]
[DebuggerStepThrough]
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18 changes: 5 additions & 13 deletions src/coreclr/nativeaot/Runtime.Base/src/System/Runtime/RuntimeExports.cs
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Expand Up @@ -194,7 +194,7 @@ public static unsafe void RhUnboxAny(object? o, ref byte data, EETypePtr pUnboxT
}
else
{
if (o != null && (TypeCast.IsInstanceOf(ptrUnboxToEEType, o) == null))
if (o != null && (TypeCast.IsInstanceOfAny(ptrUnboxToEEType, o) == null))
{
throw ptrUnboxToEEType->GetClasslibException(ExceptionIDs.InvalidCast);
}
Expand Down Expand Up @@ -392,26 +392,18 @@ internal static unsafe IntPtr RhGetRuntimeHelperForType(MethodTable* pEEType, Ru
return (IntPtr)(delegate*<MethodTable*, object>)&InternalCalls.RhpNewFast;

case RuntimeHelperKind.IsInst:
if (pEEType->IsArray)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.IsInstanceOfArray;
else if (pEEType->HasGenericVariance)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.IsInstanceOf;
if (pEEType->HasGenericVariance || pEEType->IsParameterizedType || pEEType->IsFunctionPointerType)
return (IntPtr)(delegate*<MethodTable*, object, object?>)&TypeCast.IsInstanceOfAny;
else if (pEEType->IsInterface)
return (IntPtr)(delegate*<MethodTable*, object?, object?>)&TypeCast.IsInstanceOfInterface;
else if (pEEType->IsParameterizedType || pEEType->IsFunctionPointerType)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.IsInstanceOf; // Array handled above; pointers and byrefs handled here
else
return (IntPtr)(delegate*<MethodTable*, object?, object?>)&TypeCast.IsInstanceOfClass;

case RuntimeHelperKind.CastClass:
if (pEEType->IsArray)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.CheckCastArray;
else if (pEEType->HasGenericVariance)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.CheckCast;
if (pEEType->HasGenericVariance || pEEType->IsParameterizedType || pEEType->IsFunctionPointerType)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.CheckCastAny;
else if (pEEType->IsInterface)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.CheckCastInterface;
else if (pEEType->IsParameterizedType || pEEType->IsFunctionPointerType)
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.CheckCast; // Array handled above; pointers and byrefs handled here
else
return (IntPtr)(delegate*<MethodTable*, object, object>)&TypeCast.CheckCastClass;

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