[PATCH] D131502: [X86][BF16][Experiment] Fix the missing fpext/fpround back for BF16 promote

[Phoebe Wang via Phabricator via llvm-commits]

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This is an experimental patch referred to the method introduced by D73749 <https://reviews.llvm.org/D73749>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D131502

Files:
  llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
  llvm/lib/CodeGen/TargetLoweringBase.cpp
  llvm/test/CodeGen/X86/bfloat.ll

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