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00d5002e51
This prevents against assertion errors like PR32659 which occur from a replacement deleting a node after it's been added to the list argument of RemoveDeadNodes. The specific failure from PR32659 does not currently happen, but it is still potentially possible. The underlying cause is that the callers of the change dfunction builds up a list of nodes to delete after having moved their uses and it possible that a move of a later node will cause a previously deleted nodes to be deleted. Reviewers: bkramer, spatel, davide Reviewed By: spatel Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D33731 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305070 91177308-0d34-0410-b5e6-96231b3b80d8