rsmith added a comment.

I think the ideal solution would be something like:

If a variable produced by a macro expansion shadows a variable not produced by 
a macro expansion, do not warn immediately. Instead, warn if we see a use of 
the inner variable in a context that is not produced by the same macro 
expansion (more broadly: for each point of use, if there is no macro expansion 
that contains both the point of declaration of the inner variable and all 
points of use, then warn). As an approximation to this, we could suppress the 
warning only if the (start of the) scope containing the inner variable and the 
inner variable itself were produced by the same macro expansion.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D35783/new/

https://reviews.llvm.org/D35783



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