[PATCH] D42551: [Debug] Add dbg.value intrinsics for PHIs created during LCSSA.

[Daniel Berlin via Phabricator via llvm-commits]

dberlin added a comment.

This adds another basic block walk per InstBB, because llvm::insertDebugValuesForPHIs walks the entire bb :(

LCSSA can already be quite slow.
Do you have compile time numbers on some of the cases where LCSSA is already slow.


https://reviews.llvm.org/D42551