[PATCH] D144953: [LoopVectorize] Only fetch BFI if profile summary available

[Nikita Popov via Phabricator via llvm-commits]

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BlockFrequencyInfo should generally only be fetched in PGO builds where a PSI profile summary is available. However, LoopVectorize was fetching it unconditionally.

This results in a compile-time improvement: http://llvm-compile-time-tracker.com/compare.php?from=f332498f9880d276890562fb861a375a13bfd9d9&to=7b224f4a8ef2355298051f8f326eccda4cb07b41&stat=instructions%3Au


https://reviews.llvm.org/D144953

Files:
  llvm/include/llvm/Transforms/Vectorize/LoopVectorize.h
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Other/new-pm-defaults.ll
  llvm/test/Other/new-pm-lto-defaults.ll
  llvm/test/Other/new-pm-thinlto-defaults.ll

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