[PATCH] D86578: [TargetLowering] Combine known bits for icmp in SimplifySetCC (PR41182)

[Matt D'Arcangelo via Phabricator via llvm-commits]

darcangelo.matthew added a comment.

In D86578#2239392 <https://reviews.llvm.org/D86578#2239392>, @nikic wrote:

> What is the motivation for this patch? The added tests should already get folded before reaching the backend (by InstCombine). We should only add folds to DAGCombine if the folded pattern is created by legalization. What is the original context for this change?

This was an unassigned enhancement - https://bugs.llvm.org/show_bug.cgi?id=41182 - that I was interested in and wanted to have a go at. Unfortunately that's all I have for context on my end


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