[PATCH] D84108: [SimplifyCFG][LoopRotate] SimplifyCFG: disable common instruction hoisting by default, enable late in pipeline

[Sanne Wouda via Phabricator via llvm-commits]

sanwou01 added a comment.

Just wanted to add to @fhahn that we're seeing this too, as an even more notable 8% regression (same benchmark, different hardware). Florian's explanation matches what I'm seeing, but I hadn't had a chance to confirm what was happening.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D84108/new/

https://reviews.llvm.org/D84108