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

[Eric Christopher via Phabricator via llvm-commits]

echristo added a comment.

One more follow up here:

One set of benchmarks we're seeing this in are also in the llvm test harness:

llvm_multisource_tsvc.TSVC-ControlFlow-flt and llvm_multisource_misc.Ptrdist-yacr2

in an FDO mode (so we have some decent branch hints for the code).

You should be able to duplicate at least some of the slowdown there.


Repository:
  rG LLVM Github Monorepo

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