[PATCH] D38055: Tighten the invariants around LoopBase::invalidate

[Sanjoy Das via Phabricator via llvm-commits]

sanjoy created this revision.
Herald added subscribers: mcrosier, mehdi_amini.

With this change:

- Methods in LoopBase trip an assert if the receiver has been invalidated
- LoopBase::invalidate frees up the memory held the LoopBase instance

This change also shuffles things around as necessary to work with this stricter invariant.


https://reviews.llvm.org/D38055

Files:
  include/llvm/Analysis/LoopInfo.h
  include/llvm/Analysis/LoopInfoImpl.h
  include/llvm/Transforms/Scalar/LoopPassManager.h
  include/llvm/Transforms/Utils/UnrollLoop.h
  lib/Analysis/LoopInfo.cpp
  lib/Analysis/LoopPass.cpp
  lib/Transforms/Scalar/LoopUnrollPass.cpp
  lib/Transforms/Utils/LoopUnroll.cpp
  test/Transforms/LoopUnroll/unroll-loop-invalidation.ll

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