[PATCH] D66537: [DAGCombiner] Remove a bunch of redundant AddToWorklist calls.

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix created this revision.
deadalnix added reviewers: craig.topper, efriedma, RKSimon, lebedev.ri.
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This comes as a first step toward processing the DAG nodes in topological orders. Doing so ensure that arguments of a node are combined before the node itself is combined, which exposes ore opportunities for optimization and/or reduce the amount of patterns a node has to match for.

DAGCombiner adding nodes to the worklist is various places causes the nodes to be in a different order from what is expected. In addition, this is reduant because these nodes end up being added to the worklist anyways due to the machinery at line 1621.


Repository:
  rL LLVM

https://reviews.llvm.org/D66537

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp

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