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[DAGCombiner] Remove mostly redundant calls to AddToWorklist

Authored by deadalnix on Aug 21 2019, 10:40 AM.



These calls change the order in which some nodes are processed and so have an effect on codegen.

The change in fixup-bw-copy.ll is due to (and (load anyext)) gets transformed into (load zext) while previously the and was removed by SimplifyDemandedBits, so the (load anyext) remained.

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deadalnix created this revision.Aug 21 2019, 10:40 AM
Herald added a project: Restricted Project. · View Herald TranscriptAug 21 2019, 10:40 AM
deadalnix retitled this revision from [DAGCombiner] Remove ostl redundant calls to AddToWorklist to [DAGCombiner] Remove mostly redundant calls to AddToWorklist.Aug 21 2019, 10:43 AM
efriedma accepted this revision.Aug 21 2019, 11:39 AM

These are redundant because they're new nodes? Sure, LGTM.

This revision is now accepted and ready to land.Aug 21 2019, 11:39 AM

They are indeed new nodes that end up being added to the worklist when their user is processed.

This revision was automatically updated to reflect the committed changes.