[PATCH] D74079: [SimplifyLibCalls] Simplify __strlen_chk

[George Burgess IV via Phabricator via llvm-commits]

george.burgess.iv created this revision.
george.burgess.iv added reviewers: jdoerfert, erik.pilkington.
Herald added subscribers: llvm-commits, dexonsmith, hiraditya.
Herald added a project: LLVM.

Bionic has had `__strlen_chk` for quite a while; its goal is to catch overflows of unterminated strings.

This CL allows LLVM to optimize that to `strlen` where appropriate.


https://reviews.llvm.org/D74079

Files:
  llvm/include/llvm/Analysis/TargetLibraryInfo.def
  llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h
  llvm/lib/Analysis/TargetLibraryInfo.cpp
  llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
  llvm/test/Transforms/InstCombine/strlen_chk.ll
  llvm/unittests/Analysis/TargetLibraryInfoTest.cpp

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