message: llvm2alive: remove support for strr?chr as LLVM optimizes these
diff: @@ -191,14 +191,6 @@ known_call(llvm::CallInst &i, const llvm::TargetLibraryInfo &TLI,
  RETURN_KNOWN_ATTRS();
  }
  - case llvm::LibFunc_strchr:
  - case llvm::LibFunc_strrchr:
  - attrs.set(FnAttrs::NoThrow);
  - attrs.set(FnAttrs::ArgMemOnly);
  - attrs.set(FnAttrs::NoWrite);
  - attrs.set(FnAttrs::NoFree);
  - RETURN_KNOWN_ATTRS();
  -
  case llvm::LibFunc_fopen:
  ret_and_args_no_undef();
  attrs.set(FnAttrs::NoThrow);
  