[PATCH] D86347: [SimplifyCFG] Two entry phi select costs

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.
samparker added reviewers: lebedev.ri, mkazantsev.
Herald added a subscriber: hiraditya.
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samparker requested review of this revision.

In same manner as D82438 <https://reviews.llvm.org/D82438>, but in FoldTwoEntryPHINode, estimate the cost needed to insert the required selects and count this against the given budget. This will prevent some high cost conversions which IfConversion can later evaluate with better accuracy.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86347

Files:
  llvm/lib/Transforms/Utils/SimplifyCFG.cpp
  llvm/test/Transforms/PGOProfile/chr.ll
  llvm/test/Transforms/SimplifyCFG/ARM/phi-eliminate.ll
  llvm/test/Transforms/SimplifyCFG/ARM/speculate-math.ll
  llvm/test/Transforms/SimplifyCFG/PhiEliminate3.ll
  llvm/test/Transforms/SimplifyCFG/speculate-math.ll

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