[PATCH] D137505: [SCEV] Cache ZExt SCEV expressions.

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

In D137505#3977595 <https://reviews.llvm.org/D137505#3977595>, @nikic wrote:

> My main thought here was that a forwarding node would avoid the need to do two folding set lookups, and should also avoid the need for the separate FoldID.

For what it's worth, I roughly sketched out what I had in mind here: https://github.com/llvm/llvm-project/commit/b158b70df1bb49036da8312a76f0b54de6466f7f This causes a change in incorrect-
exit-count.ll though, so probably it's not right.


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https://reviews.llvm.org/D137505