JIT: Fix generating unrepresentable nullchecks on ARM64 #71687
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The logic in lowering could in some struct and primitive type cases generate an unrepresentable NULLCHECK node for ARM64/LA64, when there was a contained address mode. We now use the width from the address mode, if this keeps the access small enough, and otherwise clear containedness. Fix dotnet#71684
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch Issue DetailsThe logic in lowering could in some struct and primitive type cases Fix #71684
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Avoid creating the address mode in the first place for unrepresentable accesses.
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cc @dotnet/jit-contrib PTAL @EgorBo |
EgorBo
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Jul 6, 2022
EgorBo
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Jul 6, 2022
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The logic in lowering could in some struct and primitive type cases
generate an unrepresentable NULLCHECK node for ARM64/LA64 when there
was a contained address mode. We now transform unused indirections and
create address modes in the opposite order on non-xarch to avoid these unrepresentable
nullchecks.
Fix #71684