[PATCH] D20957: [JumpThreading] Prevent dangling pointer problems in BranchProbabilityInfo

[Igor Laevsky via llvm-commits]

igor-laevsky created this revision.
igor-laevsky added reviewers: sanjoy, reames, hfinkel.
igor-laevsky added a subscriber: llvm-commits.

We should update results of the BranchProbabilityInfo after removing block in JumpThreading. Otherwise we will get dangling pointer inside BranchProbabilityInfo cache. Which can lead to various problems. Note that there is similar issue for the BlockFrequencyInfo but it's a subject for separate change.

http://reviews.llvm.org/D20957

Files:
  include/llvm/Analysis/BranchProbabilityInfo.h
  include/llvm/Transforms/Utils/Local.h
  lib/Analysis/BranchProbabilityInfo.cpp
  lib/Transforms/Scalar/JumpThreading.cpp
  lib/Transforms/Utils/Local.cpp
  unittests/Analysis/BlockFrequencyInfoTest.cpp

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