[PATCH] D123817: [InstCombine] Fold strnlen of constant strings.

[Martin Sebor via Phabricator via llvm-commits]

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This patch in the `strnlen` series implements folding of calls with constant string arguments.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123817

Files:
  llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
  llvm/test/Transforms/InstCombine/strnlen-1.ll
  llvm/test/Transforms/InstCombine/strnlen-3.ll

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