[PATCH] D123815: [InstCombine] Add a strnlen handler stub.

[Martin Sebor via Phabricator via llvm-commits]

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This patch in the `strnlen` series adds a stub handler for the function and annotates calls to it with the expected attributes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123815

Files:
  llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h
  llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
  llvm/test/Transforms/InstCombine/strnlen-1.ll
  llvm/test/Transforms/InstCombine/strnlen-2.ll
  llvm/test/Transforms/InstCombine/strnlen-3.ll
  llvm/test/Transforms/InstCombine/strnlen-5.ll
  llvm/test/Transforms/InstCombine/strnlen-6.ll

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