[PATCH] D58210: [SelectionDAGLegalize] Improve promotion of CTLZ

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Generally we should prefer to perform combines in DAGCombine in cases where it's straightforward.  (There are a few scattered optimizations in legalization, but mostly for cases that can't simplify after legalization, like libcalls.)


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  https://reviews.llvm.org/D58210/new/

https://reviews.llvm.org/D58210