[PATCH] D82638: [MachineCopyPropagation] BackwardPropagatableCopy: add check for hasOverlappingMultipleDef

[Kai Luo via Phabricator via llvm-commits]

lkail added a comment.

In D82638#2118048 <https://reviews.llvm.org/D82638#2118048>, @efriedma wrote:

> If the definition is earlyclobber, do we also need to check for overlapping uses?

Prior `propagateDefs`, there is an invalidation of earlyclobber registers, so in `propagateDefs`, if `MODef` is earlyclobber, there should not be a corresponding COPY to propagate from.


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https://reviews.llvm.org/D82638