[PATCH] D28962: Add BFI in constanthoisting pass and do the hoisting selectively

[Wei Mi via Phabricator via llvm-commits]

wmi updated this revision to Diff 87189.
wmi added a comment.

Make change to save compile time and add assertion per David's suggestions.


Repository:
  rL LLVM

https://reviews.llvm.org/D28962

Files:
  include/llvm/Transforms/Scalar/ConstantHoisting.h
  lib/Transforms/Scalar/ConstantHoisting.cpp
  test/CodeGen/X86/constant-hoisting-bfi.ll
  test/CodeGen/X86/fold-tied-op.ll

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