[PATCH] D101142: [SimplifyCFG/JumpThreading] Transfer loop metadata to new latch.

[Michael Kruse via Phabricator via llvm-commits]

Meinersbur created this revision.
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When simplifying an empty block with an unconditional branch by skipping over it, the skipped block might have been a loop's latch. In that case transfer the loop's metadata attached to the latch to the new latch. If it already is also a latch with different metadata, do not skip the block.

Part of fix for llvm.org/PR50060.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101142

Files:
  llvm/include/llvm/Transforms/Scalar/JumpThreading.h
  llvm/include/llvm/Transforms/Utils/Local.h
  llvm/lib/Transforms/Scalar/JumpThreading.cpp
  llvm/lib/Transforms/Utils/Local.cpp
  llvm/lib/Transforms/Utils/SimplifyCFG.cpp
  llvm/test/Transforms/LoopVectorize/X86/x86-interleaved-accesses-masked-group.ll
  llvm/test/Transforms/SimplifyCFG/pr50060-jumpthread.ll

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