[PATCH] D22835: [BPI] Add new LazyBPI analysis

[Adam Nemet via llvm-commits]

anemet created this revision.
anemet added reviewers: davidxl, hfinkel.
anemet added a subscriber: llvm-commits.

The motivation is the same as in D22141: In order to add the hotness
attribute to optimization remarks we need BFI to be available in all
passes that emit optimization remarks.  BFI depends on BPI so unless we
make this lazy as well we would still compute BPI unconditionally.

The solution is to use the new LazyBPI pass in LazyBFI and only compute
BPI when computation of BFI is requested by the client.

I extended the laziness test using a LoopDistribute test to also cover
BPI.

https://reviews.llvm.org/D22835

Files:
  include/llvm/Analysis/LazyBlockFrequencyInfo.h
  include/llvm/Analysis/LazyBranchProbabilityInfo.h
  include/llvm/InitializePasses.h
  lib/Analysis/Analysis.cpp
  lib/Analysis/CMakeLists.txt
  lib/Analysis/LazyBlockFrequencyInfo.cpp
  lib/Analysis/LazyBranchProbabilityInfo.cpp
  test/Analysis/BranchProbabilityInfo/basic.ll
  test/Transforms/LoopDistribute/diagnostics-with-hotness-lazy-BFI.ll

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