[PATCH] D98213: [InlineCost] Enable the cost benefit analysis on FDO

[Wenlei He via Phabricator via llvm-commits]

wenlei added a comment.

> The feature caims to compare the performance gains by measuring the cycles saved from a PGO run, and comparing against some threshold. This doesn't make sense since the length of the runs for PGO are arbitrary, and you shouldn't be using them in absolute terms.

IIUC, hot threshold is being taken into account in the formula (at the very end of `costBenefitAnalysis`), so this is affected by relative hotness only. It's just like how pgo counts are used and supposed to be used anywhere else in the pipeline.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D98213/new/

https://reviews.llvm.org/D98213