On 64 bit platforms, "stelem.ref" and "ldelema" ignore the high bits of a native int index #71571
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…of a native int index Fix dotnet#52817
ghost
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src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/CastHelpers.cs
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We had the same problem for NewArray helper some time ago and we fixed it there by changing the NewArray helper to take native int. Would it be better to do the same thing here to avoid the code duplication? For R2R, we have introduced a new compat band in .NET 7, so it is ok to make JIT helper breaking changes without doing anything special about it. |
…gh bits of a native int index" This reverts commit 47eba9a.
| @@ -830,7 +830,7 @@ private static unsafe void StelemRef_Helper(ref object element, MethodTable* ele | |||
| } | |||
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| ref object rawData = ref Unsafe.As<byte, object>(ref Unsafe.As<RawArrayData>(array).Data); | |||
| return ref Unsafe.Add(ref rawData, index); | |||
| return ref Unsafe.Add(ref rawData, (int)index); | |||
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There is Unsafe.Add overload that takes IntPtr. It should not be necessary to cast the index to int here. It just going to add an extra unnecessary instruction.
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If the problem is that the "minimal runtime" does not compile without the cast, just add the necessary method to the minimal Unsafe used by the minimal runtime.
Co-authored-by: Michal Strehovský <[email protected]>
Fixes #52817