dim added a comment.

Actually, having thought about it a little more, if the warning is "rather 
broken", or even "completely broken", depending on one's point of view, then 
maybe it is better not have it under `-Wextra` either?  E.g. somebody has to 
ask for the warning specifically, using `-Wtautological-constant-compare`, or 
use `-Weverything`?

I ask this, because in FreeBSD we have traditionally been using `-W`, which is 
(again, historically) an alias for `-Wextra`.  We now still have to explicitly 
use `-Wno-tautological-constant-compare` everywhere. :-(


Repository:
  rC Clang

https://reviews.llvm.org/D41512



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