shuaiwang added a comment.

In https://reviews.llvm.org/D50447#1192393, @JonasToth wrote:

> ... just check if the variable is dereferenced in the scope of the loop (any
>  declRefExpr exists).


+1
And I would imagine it's very rare (as in categories not raw number of 
occurrences) for a loop variable to be not used in the loop body so it's 
probably a safe change. Though I'm interested to learn whether there's any real 
false negative by doing this.


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D50447



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