ContainBlockStoreAddress on arm64 can remove handles

[jakobbotsch]

The armarch version of Lowering::ContainBlockStoreAddress has tiny inlined version of TryCreateAddrMode that seems like it needs to be audited. In addition to the issue in #76532, it can also remove handles.

We should figure out if we can replace it with (a subset of) TryCreateAddrMode, and otherwise at least fix the handle issue.

category:correctness
theme:lower
skill-level:intermediate
cost:small
impact:small

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Issue Details

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The armarch version of Lowering::ContainBlockStoreAddress has tiny inlined version of TryCreateAddrMode that seems like it needs to be audited. In addition to the issue in #76532, it can also remove handles.

We should figure out if we can replace it with (a subset of) TryCreateAddrMode, and otherwise at least fix the handle issue.

Author:	jakobbotsch
Assignees:	-
Labels:	area-CodeGen-coreclr
Milestone:	-

[kunalspathak]

@jakobbotsch - can you confirm if this is still relevant and if yes, share more details?