[PATCH] D123530: Optimize cross block gc.relocate lowering. NFC.

[Serguei Katkov via Phabricator via llvm-commits]

skatkov added a comment.

Well.. Do I understand correctly that the original problem comes from the fact that during lowering of statepoint if value is relocated through register then this register is exported unconditionally?

So if during statepoint lowering we export the value only in case there is a relocate outside of current basic block, the extra copy is disappeared.
gc.relocate should be handled in the same way - if there is a use outside of this basic block then export is needed otherwise no export at all. As I understand this corresponds to usual handling of instruction and no special handling of gc.relocate is required?

Do I miss anything?


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https://reviews.llvm.org/D123530