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Pointer64 -> CompressedPointer32
Compress 64-bit memory addresses into 32-bit offsets by shifting them based on a heap-alignment factor.
Problem it solves
64-bit pointers double the memory footprint of reference fields compared to 32-bit JVMs.
Consumes
Emits
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.