JIT: remove incorrect type deduction for an Unsafe.As case #93694
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Thanks to @SingleAccretion for the fix. The JIT was assuming that an indirectly accessed value type field had the type of the field, but that might not be the case if the field was accessed via `Unsafe.As`. Fix this by limiting type deduction from these indirectly accessed fields to only ref type fields. Closes dotnet#93650.
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch Issue DetailsThanks to @SingleAccretion for the fix. The JIT was assuming that an indirectly accessed value type field had the type of the field, but that might not be the case if the field was accessed via Fix this by limiting type deduction from these indirectly accessed fields to only ref type fields. Closes #93650.
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@jakobbotsch PTAL |
jakobbotsch
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Oct 18, 2023
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No diffs or TP impact. |
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/backport to release/8.0 |
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Started backporting to release/8.0: https://github.com/dotnet/runtime/actions/runs/6567332986 |
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Thanks to @SingleAccretion for the fix.
The JIT was assuming that an indirectly accessed value type field had the type of the field, but that might not be the case if the field was accessed via
Unsafe.As.Fix this by limiting type deduction from these indirectly accessed fields to only ref type fields.
Closes #93650.