[5.5] DeadObjectAllocation: fix a use-after free crash #37161
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The optimization tried to optimized a keypath instruction which was already deleted in a previous iteration. rdar://77180080
eeckstein
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AnthonyLatsis
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🍒 release cherry pick
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The optimization tried to optimized a keypath instruction which was already deleted in a previous iteration.
rdar://77180080
This is a cherry-pick of #37127