[PATCH] D149507: [SeparateConstOffsetFromGEP] Fix bug handling negative offsets

[Tom Stellard via Phabricator via llvm-commits]

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Negative offsets were being zero-extend when used as part of a computation
where the result was zero-extended.  This was causing negative offsets to
be converted to very large positive numbers.
e.g. -15 => 17179869124

Resolves #62379


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D149507

Files:
  llvm/lib/Transforms/Scalar/SeparateConstOffsetFromGEP.cpp
  llvm/test/Transforms/SeparateConstOffsetFromGEP/pr62379-zeroext-negative.ll

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