[Runtime] Shrink RemanglerBuffer's SubstitutionEntry. #81084
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We stack-allocate 512 of these entries for a temporary cache, so the entry size matters a great deal. Shrink it from 3 words to 2 by storing treatAsIdentifier in the low bit of the node pointer. rdar://149685318
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We stack-allocate 512 of these entries for a temporary cache, so the entry size matters a great deal. Shrink it from 3 words to 2 by storing treatAsIdentifier in the low bit of the node pointer.
rdar://149685318