[PATCH] D116935: [IRBuilder] Introduce folder using inst-simplify, use for Or fold.

[Roman Lebedev via Phabricator via cfe-commits]

lebedev.ri added a comment.

In D116935#3232126 <https://reviews.llvm.org/D116935#3232126>, @craig.topper wrote:

> If I remember correctly, the Or and And folds for 0 and all 1s are there to optimize bitfield codegen for the frontend. Are we losing that optimization if this patch goes in before switching clang to InstSimplifyFolder?

True, but why is that optimization there in the first place?
Presumably it shouldn't matter nowadays.


Repository:
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https://reviews.llvm.org/D116935