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d3c5ebd041
Summary: Nodes that have no uses are eventually pruned when they are selected from the worklist. Record nodes newly added to the worklist or DAG and perform pruning after every combine attempt. Reviewers: efriedma, RKSimon, craig.topper, spatel, jyknight Reviewed By: jyknight Subscribers: jdoerfert, jyknight, nemanjai, jvesely, nhaehnle, javed.absar, hiraditya, jsji, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58070 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@357283 91177308-0d34-0410-b5e6-96231b3b80d8