[PATCH] D93906: [LoopDeletion] Break backedge of loops when known not taken

[Philip Reames via Phabricator via llvm-commits]

reames updated this revision to Diff 315675.
reames added a comment.

Context: This patch was reverted following failures in stage2 builders (only).  Still investigating root cause.  Reproduction is a bit of a pain.

Rebasing over landed test file to simplify my life.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D93906/new/

https://reviews.llvm.org/D93906

Files:
  llvm/include/llvm/Transforms/Utils/LoopUtils.h
  llvm/lib/Transforms/Scalar/LoopDeletion.cpp
  llvm/lib/Transforms/Utils/LoopUtils.cpp
  llvm/test/Transforms/IndVarSimplify/X86/pr45360.ll
  llvm/test/Transforms/IndVarSimplify/exit_value_test2.ll
  llvm/test/Transforms/LoopDeletion/update-scev.ll
  llvm/test/Transforms/LoopDeletion/zero-btc.ll

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