Add `memoryrefunset` intrinsic (#61759)

To allow for  write barriers to be added for concurrent GC.

Coauthored by claude.

---------

Co-authored-by: Cody Tapscott <84105208+topolarity@users.noreply.github.com>

Oscar Smith committed 3mo ago

afd703e7137ed8eec4cc1326a5b9b54de7ece2da

Parent: 062a90b

Committed by GitHub <noreply@github.com> on 5/21/2026, 4:14:24 PM