Change Details

Nodes that have no uses are added to the worklist will eventually be pruned, when they are considered. This is leaves a transient where the existence of dangling nodes may inhibit some optimizations. This change records which nodes are added to the worklist and upon finishing the current DAGCombine visit, immediately checks to see if they may be pruned. This generally improves codegen, save in some cases where an extension is not pulled before an inputs operator. This should be fixed in a followup patch.

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.

Nodes that have no uses are added to the worklist will eventually beeventually pruned when they are selected pruned, when they are consideredfrom the worklist. This is leaves a transient where theRecord nodes newly added to the worklist or DAG and existence of danglperform pruning nodes may inhibit some optimizations. Thisafter every combine attempt. change records which nodes are added to the worklist and upon finishing the current DAGCombine visit, immediately checks to see if they may be pruned. This generally improves codegen, save in some cases where an extension is not pulled before an inputs operator. This should be fixed in a followup patch.