[PATCH] D99716: [LoopFusion] Bails out if only the second candidate is guarded (PR48060)

[Ta-Wei Tu via Phabricator via llvm-commits]

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If only the second candidate loop is guarded while the first one is not, fusioning
two loops might not be valid but this check is currently missing.

Fixes https://bugs.llvm.org/show_bug.cgi?id=48060


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99716

Files:
  llvm/lib/Transforms/Scalar/LoopFuse.cpp
  llvm/test/Transforms/LoopFusion/pr48060.ll

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