[PATCH] D33587: [DAGCombine] Do several rounds of combine.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

Currently we largely visit nodes before their operands. So when we simplify the operands several layers down we don’t revisit the later nodes to match patterns. But if we visited the operands first, then the first visit of the later nodes would occur after. So we wouldn’t need to revisit them.


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  rL LLVM

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  https://reviews.llvm.org/D33587/new/

https://reviews.llvm.org/D33587